This document summarizes the findings of a study on the length-weight relationship of the riverine fish Chela bacaila collected from the Wainganga River in India. 386 fish were measured and categorized by sex (212 males and 174 females). Regression analysis found the relationships to be: male C. bacaila W = 0.006634 L 2.9086, female C. bacaila W = 0.012325 L 2.6478, and combined C. bacaila W = 0.013283 L 2.8097. The b values indicate males are heavier than females at equal lengths, and that river conditions were not optimal for the fish's healthy development
The length weight relationship of a riverine fish chela bacailaAlexander Decker
The document analyzes the length-weight relationship of the riverine fish Chela bacaila collected from the Wainganga River in India. 386 fish were measured and categorized by sex. Regression analysis found the relationships to be: for males W = 0.006634 L2.9086, for females W = 0.012325 L2.6478, and combined W = 0.013283 L2.8097. The b values deviated from 3, indicating the river conditions were not optimal for the fish's healthy development. Males were found to be heavier than females at equal lengths.
This document summarizes a study on the length-weight relationship and condition factor of Tetraodon cutcutia fish collected from Neematighat, Assam, India between April 2011 and March 2013. The growth coefficient (b) and condition factor (K) were calculated monthly, seasonally, and by sex. b values ranged from 1.13-2.33 for males and 1.19-5.32 for females, indicating allometric growth. K ranged from 2.66-6.722 for males and 2.362-7.048 for females. Seasonally, b was lowest in pre-monsoon and highest in post-monsoon for males, while K was highest in winter for both
This document discusses a study on the length-weight relationship of Pearl spot (Etroplus suratensis) fish collected from Pulicat Lake in southeast India. A total of 120 fish ranging from 3.5 to 10.5 cm in length and 2.0 to 34.0 g in weight were measured. Regression analysis found the length-weight relationship to follow an allometric growth pattern. The slope value (b) was estimated to be 1.0368, indicating the weight does not increase cubically with length. Separate regression equations were calculated for males and females. The study provides baseline information that can be used for future research and population comparisons.
This document analyzes the weight-length relationship of the rosy barb fish (Puntius conchonius) collected from water bodies in Nagaland, India. 50 fish ranging from 5.2-7.6cm and 1.6-7.1g were measured. Log-transformed regressions found high correlation between length and weight. Growth was found to be negatively allometric (not proportional to the cube of length) for mixed, male, and female populations. Predictive equations were derived relating length and weight. The relationships were significant and can help studies on the species' biology, fisheries, and management.
1. The study assessed the feasibility of tagging cultured adult Delta Smelt, an endangered fish species, with passive integrated transponder (PIT) tags or acoustic tags to potentially track them as surrogates for wild fish in field experiments.
2. Preliminary experiments found that anesthetizing Delta Smelt in 35 mg/L of AQUI-S 20E for 4 minutes minimized stress while allowing tagging. Survival of PIT-tagged Delta Smelt was high at 95% after 28 days and similar to untagged controls.
3. Survival of Delta Smelt tagged with acoustic tags, either injected or surgically inserted, was significantly lower at 60% for injected tags and 50%
The length weight relationship of a riverine fish chela bacailaAlexander Decker
The document analyzes the length-weight relationship of the riverine fish Chela bacaila collected from the Wainganga River in India. 386 fish were measured and categorized by sex. Regression analysis found the relationships to be: for males W = 0.006634 L2.9086, for females W = 0.012325 L2.6478, and combined W = 0.013283 L2.8097. The b values deviated from 3, indicating the river conditions were not optimal for the fish's healthy development. Males were found to be heavier than females at equal lengths.
This document summarizes a study on the length-weight relationship and condition factor of Tetraodon cutcutia fish collected from Neematighat, Assam, India between April 2011 and March 2013. The growth coefficient (b) and condition factor (K) were calculated monthly, seasonally, and by sex. b values ranged from 1.13-2.33 for males and 1.19-5.32 for females, indicating allometric growth. K ranged from 2.66-6.722 for males and 2.362-7.048 for females. Seasonally, b was lowest in pre-monsoon and highest in post-monsoon for males, while K was highest in winter for both
This document discusses a study on the length-weight relationship of Pearl spot (Etroplus suratensis) fish collected from Pulicat Lake in southeast India. A total of 120 fish ranging from 3.5 to 10.5 cm in length and 2.0 to 34.0 g in weight were measured. Regression analysis found the length-weight relationship to follow an allometric growth pattern. The slope value (b) was estimated to be 1.0368, indicating the weight does not increase cubically with length. Separate regression equations were calculated for males and females. The study provides baseline information that can be used for future research and population comparisons.
This document analyzes the weight-length relationship of the rosy barb fish (Puntius conchonius) collected from water bodies in Nagaland, India. 50 fish ranging from 5.2-7.6cm and 1.6-7.1g were measured. Log-transformed regressions found high correlation between length and weight. Growth was found to be negatively allometric (not proportional to the cube of length) for mixed, male, and female populations. Predictive equations were derived relating length and weight. The relationships were significant and can help studies on the species' biology, fisheries, and management.
1. The study assessed the feasibility of tagging cultured adult Delta Smelt, an endangered fish species, with passive integrated transponder (PIT) tags or acoustic tags to potentially track them as surrogates for wild fish in field experiments.
2. Preliminary experiments found that anesthetizing Delta Smelt in 35 mg/L of AQUI-S 20E for 4 minutes minimized stress while allowing tagging. Survival of PIT-tagged Delta Smelt was high at 95% after 28 days and similar to untagged controls.
3. Survival of Delta Smelt tagged with acoustic tags, either injected or surgically inserted, was significantly lower at 60% for injected tags and 50%
Kotak Mahindra Bank was facing high attrition and offer drop-offs due to ineffective hiring practices. This was resulting in lost revenue, increased costs, and sales team churn. Kotak engaged Global Talent Metrics to improve hiring effectiveness and reduce attrition. Global Talent Metrics conducted an evaluation of Kotak's organization and hiring process. They implemented their STARTM system to match candidates' characteristics to the organization profile to assess hiring risk. After 12 months, STARTM accurately identified 83% of low-risk candidates and had an overall 78% accuracy rate. This helped Kotak reduce costs from attrition.
This document proposes an implementation of LINQ-style querying for ActionScript 3 collections. It provides examples of filtering, sorting, grouping and selecting data from collections using query syntax. The implementation would include interfaces like IQuery and ICondition to define query and filter objects. CollectionQuery would be the main class, allowing queries to be built and executed on a target collection. Predicates would represent individual filter conditions, and Conditions groups of predicates. The proposal outlines methods, properties and classes required to support queries on nested and complex objects.
The document discusses crop production techniques in Bihar such as System of Rice Intensification (SRI) and hybrid rice. It provides statistics on land usage, crop yields, and production targets in Bihar. The key initiatives to promote SRI and hybrid rice techniques include distribution of seeds and equipment, trainings for farmers, and monitoring of crop growth and yields.
Presented at the 2005 NJEDge.Net Annual Conference by Debbie Kell & Ken Ronkowitz. Traces the development of a collaborative faculty development model (using WebCT training as a focus) that began at NJIT and was adapted to the needs of Mercer County College in New Jersey.
This document analyzes the weight-length relationship of the rosy barb fish (Puntius conchonius) collected from water bodies in Nagaland, India. 50 fish ranging from 5.2-7.6cm and 1.6-7.1g were measured. Log-transformed regressions found significant correlations between length and weight for mixed, male, and female populations, though growth was negatively allometric. The relationships suggest predictive equations can estimate weight from length and vice versa. The study provides information on the growth and management of the species' fisheries in Nagaland.
Accretion Profile of the Rosy Barb, Puntius Conchonius (Hamilton- Buchanan, 1...IOSR Journals
Present study was made on 50 freshwater wild Puntius conchonius (Hamilton - Buchanan) of
various sizes ranging from a total length of 5.2 cm to 7.6 cm and weighing 1.6 gm to 7.1 gm. They were
sampled from different lentic and lotic water bodies of Nagaland, to investigate the weight-length relationship.
Each fish was measured and weight was taken. Log transformed regressions were used to test the growth trend. It was observed that growth in weight is not proportional to the cube of its length. Coefficient of correlation values for both male and female as well as for mixed population were found to be highly significant.
This document studies the length-weight relationship of Mugil cephalus, a species of grey mullet, collected from the Kovalam coast of Chennai, India. The slope value (b) estimated for both male and female M. cephalus was 1.0368, indicating allometric growth. The regression equation for females was Log W = -0.7292 + 1.0368 Log L. The growth was found to be significantly different between sexes. Comparing the slope value to other brackishwater fish species, it was concluded that the slope value of 1.0368 for M. cephalus is less than the typical value of 3, indicating their growth pattern differs from the
Aspects of the biology of african moony, monodactylus sebae from badagry cree...Alexander Decker
The document summarizes a study on the biology of the African moony fish (Monodactylus sebae) in Badagry Creek, Lagos, Nigeria. A total of 267 fish were collected from May 2012 to April 2013. The fish lengths ranged from 56-163 mm and weights ranged from 5.6-151.7 g. The length-weight relationship showed negative allometric growth. The condition factor was higher in females than males. The sex ratio was approximately 1:1 male to female.
11.[8 17]length-weight relationships of some important estuarine fish species...Alexander Decker
This document presents a study on the length-weight relationships of 23 fish species found in the Merbok estuary in northern Peninsular Malaysia. The study found:
- The b values for the length-weight relationships varied between 2.7928 and 3.6001, indicating 9 species exhibited positive allometric growth, 10 negative allometric growth, 3 isometric growth, and 1 Gompertz form of growth.
- Condition factors ranged from 0.5769 to 3.4994, showing most species were in good condition.
- This study provides the first published length-weight relationships for species from the Merbok estuary. Most fish specimens were juveniles, indicating the estuary
International Journal of Engineering and Science Invention (IJESI)inventionjournals
1) The study examined 145 gobies (Parachaeturichthys ocellatus) from Malad creek in Mumbai from July 2010 to August 2011. It analyzed 19 morphometric and 10 meristic characters.
2) The morphometric analysis found strong correlations between total length and standard length. Standard length showed the highest growth rate while eye diameter grew slowest. Meristic characters showed limited variation.
3) Length-weight relationships indicated negative allometry for both sexes. Males showed a stronger correlation between length and weight than females.
Morphometric study of banded gourami (Colisa fasciata) in Jessore, BangladeshAbdullaAlAsif1
Population morphometry including population demography, size group distribution, length weight relationship and sex ratio of an important freshwater fish, Colisafasciata was studied which collected fromJessore and Jhenaidah districts in Bangladesh during May, 2014 to April, 2015. Random samples of 201 individuals (108males and 93 females) were collected from different fish markets in Jessore (Monirampur, Borobazar, Chowgasa) and Jhenaidah (Mohespur, Barobazar, Kotchandpur) districst. The mean size of the specimen was recorded 65.08 ±14.32 mm in length and 7.43 ±3.09 g in body weight. Females were found little smaller than males. The specimens were larger in winter than summer and monsoon season. But in monsoon season the females were larger than males. The maximum length of the specimen collected from Jhenaidah district was smaller compare to the specimen of Jessore district. Most of the population (29%) was observed under 55-64 mm size class. Linear relationship was obtained between the log length (mm) and log weight (g) of the species in respects of sexes, seasons, and districts. The allometric coefficient ‘b’ of the relationship indicated negative allometric growth of the species as ‘b’ value was less than 3. The overall sex ratio (male: female=1:0.86)showed significant difference from the expected value 1:1. Overall males showed non-significant over females (χ2 =1.119) in all season of both districts but in November males showed the significant (P<0.01) dominance over females. However, the findings of the present study have helped us to understand more about the species is the prerequisites in fishery management strategy and culture system.
Length Frequency Distribution, Length-Weight Relationship and Condition Facto...paperpublications3
Abstract: Length –Frequency Distribution, Length – Weight relationship and condition factor of Pomadasys jubelini from the Lagos lagoon were investigated for 6months in order to study the growth pattern and wellbeing of P.jubelini. A total of 305 specimens of P.jubelini were purchased from local fisher-folks on landing sites at different locations within the Lagos lagoon ( Majidun, Makoko, Ibese, Bayeiku) from January 2012 to June 2012 and used for this study. Their Total length ranging from 12cm to 29.5cm and body weight ranged from 21.3g to 367g. The frequency distribution showed a polymodal distribution of P.jubelini. The size class of 18.0cm to 20.9cm (TL) was more abundant. The length weight relationship was determined by regression coefficient equation Log W= -1.8357+2.9628LogL (n =305, r = 0.9213). P.jubelini showed negative allometric growth (b= 2.96). The mean condition factor 1.31, indicates that P.jubelini were in good condition in the lagoon. The result from this study is relevant for fishery management and stock assessment studies of P.jubelini from the Lagos lagoon.
This document discusses the age and growth of the red toothed triggerfish (Odonus niger) off the coast of Thoothukudi, India. It estimates the von Bertalanffy growth parameters for O. niger as L∞ = 283.90 cm and K = 0.75 based on length frequency data. Total mortality (Z) was estimated to be 1.07 and fishing mortality (F) was 0.27. The natural mortality (M) was estimated to be 0.80. The exploitation ratio was estimated to be 0.25, indicating the stock is under fishing pressure. The length at first capture was close to the length that provides maximum yield per recruit. The lifespan of O
This document discusses the age and growth of the red toothed triggerfish (Odonus niger) off the coast of Thoothukudi, India. It analyzed samples collected from bottom trawls between 2008° 53.6'N latitude 78° 16'E longitude and 08° 53.8'N latitude 78° 32'E longitude. The von Bertalanffy growth parameters were estimated as L∞ = 283.90 cm and K = 0.75. Total mortality was estimated to be 1.07 and fishing mortality was 0.27. The exploitation ratio was estimated to be 0.25, indicating the stock is under fishing pressure. The estimated life span of O. niger appears to
Analysis of length-weight relationships, condition factor and Bayesian appro...Gitartha kaushik
The document analyzes length-weight relationships, condition factor, and Bayesian approach to predict the health and shape of 17 fish species collected from Lakhimpur district, Assam, India. Length-weight relationships were calculated to estimate biomass and growth patterns. Condition factor was used to assess fatness and habitat health. The Bayesian approach found 3 species to be short and deep, 9 fusiform, and 5 elongated in shape. The study found both positive and negative allometric growth among the species, with condition factors generally above 1, indicating good individual condition.
Population dynamics of tinfoil barb, barbonymus schwanenfeldii (bleeker, 1853...Alexander Decker
1. Tinfoil barb (Barbonymus schwanenfeldii) was the dominant fish species found in Pedu Reservoir, comprising 38.9% of total catch.
2. Analysis of the length-frequency data showed B. schwanenfeldii could attain a maximum length (L∞) of 30.95 cm with a growth rate (K) of 0.66 yr-1.
3. Estimates of total mortality (Z), natural mortality (M), and fishing mortality (F) for B. schwanenfeldii were 2.01, 1.37, and 0.64 yr-1 respectively, indicating potential for a slight increase
A study on length weight relationships (lwr) and growth responses of major ca...Alexander Decker
This study examined the effects of sub-lethal concentrations of lead on the growth of three major carp species: Catla catla, Labeo rohita, and Cirrhina mrigala. Fish were exposed to lead for 30 days, then transferred to ponds for 6 months of growth monitoring. Cirrhina mrigala gained the most weight, while Labeo rohita showed reduced or negative growth when exposed to lead. Analysis of length-weight relationships found allometric growth for all lead-exposed species, but isometric growth for unexposed Labeo rohita. The results could help sustainable fisheries management in river systems affected by pollution.
A MULTI WATER QUALITY PARAMETER STUDIES FORM VELLAR RIVER, TAMIL NADUIAEME Publication
In recent days, environmental pollution caused by anthropogenic input into rivers has become a serious problem. Studies on physiochemical characteristics of water on major rivers in Tamil Nadu have been done. However, minor rivers such as Vellar have less attention. At the same time, studies on microbial diversity are useful for environmental monitoring. In this regard, we collected samples from the Vellar River to examine physiochemical characters and microbial diversity to understand the present state of the river. The result shows that physiochemical characters (pH, Temperature, Salinity, TDS, and EC) are varied spatially. Whereas, the microbial diversity studies suggest that the most of water samples contact with gram-positive and gram-negative bacteria’s (Escherichia coli, streptococcus, salmonella typhi, bacillus sp, Klebsiella pneumoniae) and fungal diversity. The overall result suggests that the water quality of the Vellar River is classified in the D (poor) category. This is an alarming situation and immediate mitigative actions are needed.
Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bha...ijtsrd
The present study was conducted in Shahjangi Pond of Bhagalpur District of Bihar during April 2021 to March 2022. Zooplanktonic abundance and diversity were determined by using standard method. The principal aim of this study was to study more about the swamps overall zooplankton diversity. Water samples were collected using zooplankton net and preserved with formalin aqueous solution of formaldehyde and 5 neutral buffer 10 ml on the spot, then brought to the laboratory for further analysis. Totally 21 species of zooplankton of four different classes were recorded rotifer, cladocera, copepod and ostracoda in which Rotifera was the most dominant class followed by the cladocera, copepoda and ostracoda. From total 21 genera 10 were belongs to Rotifera, 6 from cladocera, 3 from copepoda and 2 from ostracoda. Shannon Weaver index were employed to analysis the species diversity. Priyama Kumari | Dr. Ashok Kumar Thakur "Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bhagalpur, Bihar (India)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-3 , April 2022, URL: https://www.ijtsrd.com/papers/ijtsrd49809.pdf Paper URL: https://www.ijtsrd.com/biological-science/zoology/49809/study-of-zooplankton-abundance-and-species-diversity-in-shahjangi-pond-of-bhagalpur-bihar-india/priyama-kumari
Kotak Mahindra Bank was facing high attrition and offer drop-offs due to ineffective hiring practices. This was resulting in lost revenue, increased costs, and sales team churn. Kotak engaged Global Talent Metrics to improve hiring effectiveness and reduce attrition. Global Talent Metrics conducted an evaluation of Kotak's organization and hiring process. They implemented their STARTM system to match candidates' characteristics to the organization profile to assess hiring risk. After 12 months, STARTM accurately identified 83% of low-risk candidates and had an overall 78% accuracy rate. This helped Kotak reduce costs from attrition.
This document proposes an implementation of LINQ-style querying for ActionScript 3 collections. It provides examples of filtering, sorting, grouping and selecting data from collections using query syntax. The implementation would include interfaces like IQuery and ICondition to define query and filter objects. CollectionQuery would be the main class, allowing queries to be built and executed on a target collection. Predicates would represent individual filter conditions, and Conditions groups of predicates. The proposal outlines methods, properties and classes required to support queries on nested and complex objects.
The document discusses crop production techniques in Bihar such as System of Rice Intensification (SRI) and hybrid rice. It provides statistics on land usage, crop yields, and production targets in Bihar. The key initiatives to promote SRI and hybrid rice techniques include distribution of seeds and equipment, trainings for farmers, and monitoring of crop growth and yields.
Presented at the 2005 NJEDge.Net Annual Conference by Debbie Kell & Ken Ronkowitz. Traces the development of a collaborative faculty development model (using WebCT training as a focus) that began at NJIT and was adapted to the needs of Mercer County College in New Jersey.
This document analyzes the weight-length relationship of the rosy barb fish (Puntius conchonius) collected from water bodies in Nagaland, India. 50 fish ranging from 5.2-7.6cm and 1.6-7.1g were measured. Log-transformed regressions found significant correlations between length and weight for mixed, male, and female populations, though growth was negatively allometric. The relationships suggest predictive equations can estimate weight from length and vice versa. The study provides information on the growth and management of the species' fisheries in Nagaland.
Accretion Profile of the Rosy Barb, Puntius Conchonius (Hamilton- Buchanan, 1...IOSR Journals
Present study was made on 50 freshwater wild Puntius conchonius (Hamilton - Buchanan) of
various sizes ranging from a total length of 5.2 cm to 7.6 cm and weighing 1.6 gm to 7.1 gm. They were
sampled from different lentic and lotic water bodies of Nagaland, to investigate the weight-length relationship.
Each fish was measured and weight was taken. Log transformed regressions were used to test the growth trend. It was observed that growth in weight is not proportional to the cube of its length. Coefficient of correlation values for both male and female as well as for mixed population were found to be highly significant.
This document studies the length-weight relationship of Mugil cephalus, a species of grey mullet, collected from the Kovalam coast of Chennai, India. The slope value (b) estimated for both male and female M. cephalus was 1.0368, indicating allometric growth. The regression equation for females was Log W = -0.7292 + 1.0368 Log L. The growth was found to be significantly different between sexes. Comparing the slope value to other brackishwater fish species, it was concluded that the slope value of 1.0368 for M. cephalus is less than the typical value of 3, indicating their growth pattern differs from the
Aspects of the biology of african moony, monodactylus sebae from badagry cree...Alexander Decker
The document summarizes a study on the biology of the African moony fish (Monodactylus sebae) in Badagry Creek, Lagos, Nigeria. A total of 267 fish were collected from May 2012 to April 2013. The fish lengths ranged from 56-163 mm and weights ranged from 5.6-151.7 g. The length-weight relationship showed negative allometric growth. The condition factor was higher in females than males. The sex ratio was approximately 1:1 male to female.
11.[8 17]length-weight relationships of some important estuarine fish species...Alexander Decker
This document presents a study on the length-weight relationships of 23 fish species found in the Merbok estuary in northern Peninsular Malaysia. The study found:
- The b values for the length-weight relationships varied between 2.7928 and 3.6001, indicating 9 species exhibited positive allometric growth, 10 negative allometric growth, 3 isometric growth, and 1 Gompertz form of growth.
- Condition factors ranged from 0.5769 to 3.4994, showing most species were in good condition.
- This study provides the first published length-weight relationships for species from the Merbok estuary. Most fish specimens were juveniles, indicating the estuary
International Journal of Engineering and Science Invention (IJESI)inventionjournals
1) The study examined 145 gobies (Parachaeturichthys ocellatus) from Malad creek in Mumbai from July 2010 to August 2011. It analyzed 19 morphometric and 10 meristic characters.
2) The morphometric analysis found strong correlations between total length and standard length. Standard length showed the highest growth rate while eye diameter grew slowest. Meristic characters showed limited variation.
3) Length-weight relationships indicated negative allometry for both sexes. Males showed a stronger correlation between length and weight than females.
Morphometric study of banded gourami (Colisa fasciata) in Jessore, BangladeshAbdullaAlAsif1
Population morphometry including population demography, size group distribution, length weight relationship and sex ratio of an important freshwater fish, Colisafasciata was studied which collected fromJessore and Jhenaidah districts in Bangladesh during May, 2014 to April, 2015. Random samples of 201 individuals (108males and 93 females) were collected from different fish markets in Jessore (Monirampur, Borobazar, Chowgasa) and Jhenaidah (Mohespur, Barobazar, Kotchandpur) districst. The mean size of the specimen was recorded 65.08 ±14.32 mm in length and 7.43 ±3.09 g in body weight. Females were found little smaller than males. The specimens were larger in winter than summer and monsoon season. But in monsoon season the females were larger than males. The maximum length of the specimen collected from Jhenaidah district was smaller compare to the specimen of Jessore district. Most of the population (29%) was observed under 55-64 mm size class. Linear relationship was obtained between the log length (mm) and log weight (g) of the species in respects of sexes, seasons, and districts. The allometric coefficient ‘b’ of the relationship indicated negative allometric growth of the species as ‘b’ value was less than 3. The overall sex ratio (male: female=1:0.86)showed significant difference from the expected value 1:1. Overall males showed non-significant over females (χ2 =1.119) in all season of both districts but in November males showed the significant (P<0.01) dominance over females. However, the findings of the present study have helped us to understand more about the species is the prerequisites in fishery management strategy and culture system.
Length Frequency Distribution, Length-Weight Relationship and Condition Facto...paperpublications3
Abstract: Length –Frequency Distribution, Length – Weight relationship and condition factor of Pomadasys jubelini from the Lagos lagoon were investigated for 6months in order to study the growth pattern and wellbeing of P.jubelini. A total of 305 specimens of P.jubelini were purchased from local fisher-folks on landing sites at different locations within the Lagos lagoon ( Majidun, Makoko, Ibese, Bayeiku) from January 2012 to June 2012 and used for this study. Their Total length ranging from 12cm to 29.5cm and body weight ranged from 21.3g to 367g. The frequency distribution showed a polymodal distribution of P.jubelini. The size class of 18.0cm to 20.9cm (TL) was more abundant. The length weight relationship was determined by regression coefficient equation Log W= -1.8357+2.9628LogL (n =305, r = 0.9213). P.jubelini showed negative allometric growth (b= 2.96). The mean condition factor 1.31, indicates that P.jubelini were in good condition in the lagoon. The result from this study is relevant for fishery management and stock assessment studies of P.jubelini from the Lagos lagoon.
This document discusses the age and growth of the red toothed triggerfish (Odonus niger) off the coast of Thoothukudi, India. It estimates the von Bertalanffy growth parameters for O. niger as L∞ = 283.90 cm and K = 0.75 based on length frequency data. Total mortality (Z) was estimated to be 1.07 and fishing mortality (F) was 0.27. The natural mortality (M) was estimated to be 0.80. The exploitation ratio was estimated to be 0.25, indicating the stock is under fishing pressure. The length at first capture was close to the length that provides maximum yield per recruit. The lifespan of O
This document discusses the age and growth of the red toothed triggerfish (Odonus niger) off the coast of Thoothukudi, India. It analyzed samples collected from bottom trawls between 2008° 53.6'N latitude 78° 16'E longitude and 08° 53.8'N latitude 78° 32'E longitude. The von Bertalanffy growth parameters were estimated as L∞ = 283.90 cm and K = 0.75. Total mortality was estimated to be 1.07 and fishing mortality was 0.27. The exploitation ratio was estimated to be 0.25, indicating the stock is under fishing pressure. The estimated life span of O. niger appears to
Analysis of length-weight relationships, condition factor and Bayesian appro...Gitartha kaushik
The document analyzes length-weight relationships, condition factor, and Bayesian approach to predict the health and shape of 17 fish species collected from Lakhimpur district, Assam, India. Length-weight relationships were calculated to estimate biomass and growth patterns. Condition factor was used to assess fatness and habitat health. The Bayesian approach found 3 species to be short and deep, 9 fusiform, and 5 elongated in shape. The study found both positive and negative allometric growth among the species, with condition factors generally above 1, indicating good individual condition.
Population dynamics of tinfoil barb, barbonymus schwanenfeldii (bleeker, 1853...Alexander Decker
1. Tinfoil barb (Barbonymus schwanenfeldii) was the dominant fish species found in Pedu Reservoir, comprising 38.9% of total catch.
2. Analysis of the length-frequency data showed B. schwanenfeldii could attain a maximum length (L∞) of 30.95 cm with a growth rate (K) of 0.66 yr-1.
3. Estimates of total mortality (Z), natural mortality (M), and fishing mortality (F) for B. schwanenfeldii were 2.01, 1.37, and 0.64 yr-1 respectively, indicating potential for a slight increase
A study on length weight relationships (lwr) and growth responses of major ca...Alexander Decker
This study examined the effects of sub-lethal concentrations of lead on the growth of three major carp species: Catla catla, Labeo rohita, and Cirrhina mrigala. Fish were exposed to lead for 30 days, then transferred to ponds for 6 months of growth monitoring. Cirrhina mrigala gained the most weight, while Labeo rohita showed reduced or negative growth when exposed to lead. Analysis of length-weight relationships found allometric growth for all lead-exposed species, but isometric growth for unexposed Labeo rohita. The results could help sustainable fisheries management in river systems affected by pollution.
A MULTI WATER QUALITY PARAMETER STUDIES FORM VELLAR RIVER, TAMIL NADUIAEME Publication
In recent days, environmental pollution caused by anthropogenic input into rivers has become a serious problem. Studies on physiochemical characteristics of water on major rivers in Tamil Nadu have been done. However, minor rivers such as Vellar have less attention. At the same time, studies on microbial diversity are useful for environmental monitoring. In this regard, we collected samples from the Vellar River to examine physiochemical characters and microbial diversity to understand the present state of the river. The result shows that physiochemical characters (pH, Temperature, Salinity, TDS, and EC) are varied spatially. Whereas, the microbial diversity studies suggest that the most of water samples contact with gram-positive and gram-negative bacteria’s (Escherichia coli, streptococcus, salmonella typhi, bacillus sp, Klebsiella pneumoniae) and fungal diversity. The overall result suggests that the water quality of the Vellar River is classified in the D (poor) category. This is an alarming situation and immediate mitigative actions are needed.
Study of Zooplankton Abundance and Species Diversity in Shahjangi Pond of Bha...ijtsrd
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11.[11 13]the length weight relationship of a riverine fish chela bacaila - copy
1. Journal of Biology, Agriculture and Healthcare www.iiste.org
ISSN 2224-3208 (Paper) ISSN 2225-093X (Online)
Vol 1, No.4, 2011
The Length – Weight Relationship of a Riverine Fish Chela
bacaila ( Gunther )
Dahare Rajesh
Associate Professor in Zoology
Sarvodaya Mahavidyalaya, Sindewahi
Dist. Chandrapur 441222 Maharashtra INDIA
drrajeshdahare@gmail.com
Abstract
The length-weight relationship of a fish Chela bacaila (Gunther) was studied which was collected from
Wainganga river located 20’48º N 79’38º E . The entire length-weight data were analyzed by least squire
method. The length-weight relationship of Chela bacaila was studied in 386 fishes under three categories
as male, female and common. Their corresponding parabolic representations are male C. bacaila W =
0.006634 L 2.9086 , female C. bacaila W = 0.012325 L 2.6478 and common C. bacaila W = 0.013283
L 2.8097. The equilibrium constant ‘b’ is found to be 2.9086 in males, 2.6478 in females and 2.8097
common. The males are heavier than females at equal length. The equilibrium constant not obeys the cube
law because it deviates from 3. The value of ‘b’ found to be less than three hence it indicates the river
condition was not found good for healthy development of Chela bacaila .
Key word : Length-weight relationship, Chela bacaila, Riverine fish.
1. Introduction
As for as India is concern there is an increase in the population rate as compare to food production rate and
due to that there is a problem of protein deficient malnutrition Almost nearly ¾ of our population is
suffering from the same problem. The major source of protein rich food is the fish. World’s one sixth
animal protein comes only from fish. If the fish is used as food for more extent the problem of
malnutrition can easily be solved. Hence fishery production becomes the matter of more concern.
For increasing the production of fish in both marine and inland area of water it is essential to explore water
resources. Infact the world fish production is about 90% in marine and 10% in inland water. In India this
ratio is 60 and 40 percent respectively. To developing the fish industry it becomes very essential to know
the biology of fish for satisfactory management. The length – weight relationship is one of the important
parameter in biology of fish. According to Le Cren the weight of the fish proportionately increases to the
length of fish. If the value of equilibrium constant is 3 it means fish obeys the cube law. But the physical
and chemical factor affects the growth and changes the value of equilibrium constant ‘b’.
2. Material and Method
The fishes Chela bacaila were collected from Wainganga river at Pauni, district Bhandara Maharashtra
INDIA located at 20’48º N 79’38º E. The random samples were collected of variable length in 12 months.
The fishes were bring to laboratory as for as possible in fresh condition and preserved in 10% formalin The
length of fish measure from their tip of the snout to the last ray of the caudal fin in centimeter. After
measuring the fish it was weighed on a single pan balance of 0.1gm. sensitivity. The sex of each fish was
determined after giving an incision on midventral line. The fishes were categorized in the group of 0.5
11
2. Journal of Biology, Agriculture and Healthcare www.iiste.org
ISSN 2224-3208 (Paper) ISSN 2225-093X (Online)
Vol 1, No.4, 2011
centimeters and data obtained was fitted to the formula Y=a+bX in order to test the difference between
regression coefficient for male, female and common.
3. Result and Discussion
The length–weight relationship expressed in the equation W = a Lb where as W and L represents weight
and length of fish ‘a’ is the initial growth index and ‘b’ is the equilibrium constant. In the present study 386
fishes comprising 212 males and 174 females ranging from 8.1cm. to 11.0cm. and weight 8.3 to 10.7 gm.
were utilized. The data of length –weight relationship of Chela bacaila was categorized in three groups ie.
male, female and common.
The general equation W = a Lb can be written as Log W = Log a + b Log L ie. Y = a + bX The linear
equation fitted separately and the logarithmic equation of the length-weight relationship in Chela
bacaila is shown in Table 1. The corresponding form of parabolic equation is shown in Table 2
Hence the cubic formula W = a L b represent for length – weight relationship for Chela bacaila is not
proper. The value of ‘b’ variable from 2.9086 in males, 2.6478 in females and 2.8097 common. These
values are not obeys the cube law because values are deviating from 3. The significance of variation for
length – weight relationship of Chela bacaila was carried out and these are non significant at 5% level.
The length – weight relationship was studied by many workers in variable fishes in India and abroad like
Hile 1936 in Lencicthys artadi, Allen 1938 in Salmon trutta, Bell 1963 in Tuna, Antony Raja 1067
in Sardinella longicep , Chatterji 1980 in Labeo gonius, Hatikakoti etal. 2004 in Oreochromis
mossambicus, Das 2004 in Liza tade,
In length – weight relationship the growth coefficient ‘b’ of the fish should be close to 3.0. It may ranges
between 2.4 and 4.0 as reported by Dahare, Hile and Martin. The value of ‘b’ in females is higher than the
males as reported by [Dahare, Homiara and Kulshesthra etal. The difference in the ‘b’ value of male and
female indicated that the female were heavier than the males of the same length. In Chela bacaila the
value of ‘b’ is 2.9086 in males and 2.6478 in females and common is 2.8097. It means the value of ‘b’ in
males is more than the female . This represents males are heavier than females at equal length. The value
of ‘b’ is found to be less than 3 indicate the fish have no better condition to develop in this river.
4. Acknowledgement
The author thanks to Dr. A. G. Sontakke, Ex. Director Institute of Science Nagpur INDIA for facilities
and guidance
References
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3. Journal of Biology, Agriculture and Healthcare www.iiste.org
ISSN 2224-3208 (Paper) ISSN 2225-093X (Online)
Vol 1, No.4, 2011
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river estury Chittagong M.Sc Thesis Chillagong university Bangladesh.
Kulshrestha S.K., Srivastava M. and George M. P. (1993) Length-weight relationship of a major carp Catla
catla (Ham.) from two water bodies of Bhopal. Advanced in Limnology: 329-332
Le Cren E. D. (1951) The length – weight relationship and seasonal cycle in gonadal weight and condition
in perch (Perca fluviatilis . J. Animal Ecol. 20: 201-219.
Martin W. R. (1949) The mechanics of the environmental control of body from in fishes.
Univ. Toronto Styd. Biol. 58: 1-91
Table 1 Showing Logarithmic equation of Chela bacaila
Male Chela bacaila Log Y = -2.1782 + 2.9086 Log X
.
Female Chela bacaila Log Y = -1.9092 + 2.6478 Log X
Common Chela bacaila Log Y = -1.8767 + 2.8097 Log X
.
Table 2 Showing the Parabolic equation of Chela bacaila
Male Chela bacaila W = 0.006634 L 2.9086,
.
Female Chela bacaila W = 0.012325 L 2.6478
.
Common Chela bacaila W = 0.013283 L 2.8097
.
13
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