Research Title:MORPHOMETRIC, MERISTIC CHARACTERS ANDMORPHOMETRIC, MERISTIC CHARACTERS ANDTHEIR RELATIONSHIPS INTHEIR RELATIONSHIPS IN Channa punctatusChanna punctatus(BLOCH) OF RIVER(BLOCH) OF RIVER INDUS, DISTRICTINDUS, DISTRICT JAMSHORO,JAMSHORO,SINDH, PAKISTAN.SINDH, PAKISTAN.Name of Scholar:BUSHRA ANNY DARS
INTRODUCTION• Channa punctatus (Bloch) also known asMurrel and locally known as “Shakur” arenative to fresh water system of tropical Africaand Southern Asia (Nelson, 1984) they can befound in rivers, canals, lakes, swamps,marshes, and rice fields (Mirza, 1988) inalmost any habitat where there is water (Wee,1982) they are plenty available in open waterbodies of Pakistan, Bangladesh, Thailand,India and Nepal (Rahman, 1989).
INTRODUCTION• It is fast growing fish and popular due to theabsence of intramuscularly bones, less fatand protein content high in comparison toother commercial species like carps (Rath,2000).
INTRODUCTION• In Polyculture system this fish is used aspolice fish to control the number of youngtilapia (Curz and Laudenica, 1980) this fishhas high market price having great toleranceto adverse water quality.
INTRODUCTIONPresently, no published information is availableon the morphometric and meristic charactersand their relationship in commercially importantfish, Channa punctatus from Pakistan.So the present study was initiated to supply thebaseline data on this commercially importantfish, which would enable the future researcherto culture this species in open water.
Objectives of the present Study.• Morphometric measurements of various bodyparts of shakur, Channa punctatus.• Meristic counts of shakur, Channa punctatus.
a) Morphometric study• For the morphometric study a total number of200 specimens of Channa punctatus (Bloch)with total length ranging from 67.0 to 245 mmwere collected from river Indus District,Jamshoro, Sindh, during March to August2010. The Experimental fish of various bodylengths, collected from River Indus are shownin (Fig. 1)
Fig. 1 Show the measurement length of fish Channa punctatus (Bloch) fromRiver Indus.
Morphometric studyAll the Measurements, except eye diameter, were taken ona millimeter scale. The eye diameter measurement wastaken with the help of veneer calipers (Fig 2).
Fig. 2. Show the measurement Instrument Digital verniercaliper
Morphometric studyThe following measurements were made fromeach fish(1) Total length (TL).(2) Standard length (SL).(3) Head length (HL).(4) Dorsal fin length (DFL).(5) Eye diameter (ED).(6) Girth (G).
Morphometric study(7) Tail fin length (TFL).(8) Pectoral fin length: (Pec. FL).(9) Pelvic fin length: (Pel. FL).(10) Ventral fin length (VFL).(11) Gape of mouth: (GM).
Morphometric Study• Morphometric measurements Morphometricmeasurements in relation to various bodyparts in Channa punctatus (Bloch) werestudied separately for male and female fromriver Indus near Jamshoro and presented intables 1 and 2 respectively.
Morphometric measurements• In order to compare the growth rate of variousmorphometric characters in relations to totallength have been calculated from 200 fishspecimens ranged between 67.0 to 245 mm intotal length. The following mathematicalequations were obtained in regressionanalysis between.
Morphometric measurements of female• TL and Pel. FL = - 0.2 + 0.69 TL (r = 0. 98)• TL and TFL = - 0.6 + 0.69 TL (r = 0. 99)• Whereas, eye diameter and gape of mouthmeasurements were found to be highlycorrelated with the head length.• HL and ED - 0. 3 + 0. 66 HL (r = 0. 98)• HL and GM - 0. 25 + 0. 86 HL (r = 0. 98)
b) Meristic Characters• In total six meristic character were studiedand counts were made of (1) Dorsal fin rays(2) Ventral fin rays (3) Pectoral fin rays (4)Pelvic fin rays (5) Tail fin rays (6) Lateral linescales count.• Table. 3 show the range and mean values ofmeristic counts of males and females.
Table 3 : Comparison of Meristic Characters of males(N=141) and females (N=59) channa punctatus (Bloch)from river IndusMeristicCharactersMale FemaleRange Mean Rang MeanDorsal fin ray 25-30 30.0 25-30 30.0Ventral fin ray 15-20 19.0 15-20 19.0Pectoral fin ray 10-15 15.0 10-15 15.0Pelvic fin ray 0-5 5.0 0-5 5.0Tail fin ray 10-15 15.0 10-15 15.0Lateral line scalescounts 30-38 36.0 30-38 36.0
Meristic Characters• An application of “t” test showed that there isno significant difference between variousmorphometric and meristic characters ofmales and females of Channa punctatus fromthe river Indus except girth values.
Conclusion• The reliability of the above equations would beseen to be high from the coefficient ofcorrelation (r =) values in all cases• From the regression equations it is evident thatthe standard length, head length, dorsal finlength, pectoral fin length were found to belinear with total length
Conclusion• While gape of mouth verses head length andpelvic fin length verses total length wereobserved highly correlated with the total length• In case of male the head length verses gape ofmouth (r = 0.99) and Pel. Fin length verses totallength (r = o.99) as compared to the female (r=0.98) and (r = 0.98) respectively.• The tail fin length verses total length (r = 0.99)and girth verses total length were found to behighly correlated in the case of female ascompared to male.
Conclusion• It is concluded that females were found to bemore pot-bailed and broader than that ofmales.• While males were found to be smaller in sizeand slim body.• From the morphometric study and meristiccounts of large number of specimens in thepresent study. It was inferred that there is asingle homogenous stock of Channapunctatus exists in the river Indus.
AUDIENCEPRESENTED BY:NIMRA & PARASPRESENTED BY:BUSHRA ANNY DARS