SlideShare a Scribd company logo
1 of 13
Download to read offline
ELECTROGENESIS IN FISHES
ABDUR ROUF SAMIM
M.Sc.(Final)
FISHERY SCIENCE AND
AQUACULTURE
INTRODUCTION
 Electrogenesis refers to the production of electrical
impulses in the tissues of a living organism.
 Observed in all animals such as fishes, reptiles, and
mammals etc.
TYPES OY ELECTRIC FISHES
 Strongly electric fishes
Example: Torpedo, Electrophorus etc.
 Weakly electric fishes
Example: Raja, Gymnotus etc.
RajaElectrophorus
 Electric organs are organs specialized for the production of
an electric field outside the body.
 Built up from a large number of disc like cells, called
electroplates.
 Electroplates embedded
in a jelly like extracellular
material and enclosed
within a compartment
of connective tissue.
Diagram showing electric organs
ELECTRIC ORGANS
DISTRIBUTION OF ELECTRIC ORGANS
Name of fishes Shape of electric organ Location of electric
organ
Torpedo Flat kidney shape On either side of mid-line
Malapterurus Lozenge-shape Located in skin
Raja (String ray) Spindle-shape Lying parallel to the
spinal cord in the tail
Torpedo Raja
PATTERNS OF ELECTRIC ORGAN DISCHARGES
 Monophasic pulses
 Biphasic pulses
 Polyphasic pulses
KINDS OF ELECTRIC ORGAN DISCHARGE
 Electrophorus: one small pulse followed by four large
pulse.
 Electric shark: repetition of sequence of events.
 Torpedo: four large pulses which are continuously
repeated.
MECHANISM OF ELECTRIC ORGAN DISCHARGE
+ + + + + + +
_ _ _ _ _ _ _
+ + - - - + + +
- - + + + - - -
_ _ _ _ _ _ _
+ + + + + + +
Resting phase Action Potential Spike stage
Receptor
Sensory
Nerve Fibre
Brain Optic Nerve
Electric Organ
Motor Nerve
1
2
Pathways of neural control of electric organ
FUNCTION OF ELECTRIC ORGAN
 Food procurement
 Defense
 Species and sex recognition
 Direction finding
 Communication
 Navigation
WHY ARE FISHES IMMUNE TO THEIR
OWN ELECTRIC CURRENT ?
 Got myolated nerve fibers with high degree of
insulation.
 Excitatory muscle fibers have high threshold of
excitation.
References
 www.wired.com
 www.elguanche.info
 www.revolvy.com
 www.keywordsuggests.org
 Brown, animal physiology ,2nd volume.
 Notes provided by Prof. Mukhtar Ahmad Khan.
ELECTROGENESIS IN FISHES By ABDUR ROUF SAMIM

More Related Content

What's hot

FINS IN FISHES ZOOLOGY.pptx
FINS IN FISHES ZOOLOGY.pptxFINS IN FISHES ZOOLOGY.pptx
FINS IN FISHES ZOOLOGY.pptxMonita Dhiman
 
Coldwater fisheries in India
Coldwater fisheries in IndiaColdwater fisheries in India
Coldwater fisheries in IndiaVaishaliC4
 
The curious evolution of electroreception in fish, amphibians, and monotremes...
The curious evolution of electroreception in fish, amphibians, and monotremes...The curious evolution of electroreception in fish, amphibians, and monotremes...
The curious evolution of electroreception in fish, amphibians, and monotremes...Mark McGinley
 
Parental care in fishes
Parental care in fishesParental care in fishes
Parental care in fishesRekha Jalandra
 
Induced breeding in fishes
Induced breeding in fishesInduced breeding in fishes
Induced breeding in fishesKhansaBajwa1
 
Hybridization in fishes
Hybridization in fishesHybridization in fishes
Hybridization in fishesAbhishek Giri
 
Comparative account of jaw suspension
Comparative account of jaw suspensionComparative account of jaw suspension
Comparative account of jaw suspensionpoojakamble1609
 
Fish reproduction
Fish reproductionFish reproduction
Fish reproductionShiggi
 
Larval form of mollusca
Larval form of molluscaLarval form of mollusca
Larval form of molluscaSambit Patel
 
Fish locomotion Notes
Fish locomotion NotesFish locomotion Notes
Fish locomotion Notesericchapman81
 
Natural fish seed collection
Natural fish seed collectionNatural fish seed collection
Natural fish seed collectionDegonto Islam
 
Introduction to Labeo rohita
Introduction to Labeo rohitaIntroduction to Labeo rohita
Introduction to Labeo rohitaAnukriti Nigam
 
Endocrine system of fishes ppt
Endocrine  system of fishes  pptEndocrine  system of fishes  ppt
Endocrine system of fishes pptAshish sahu
 
Hypophysation
HypophysationHypophysation
Hypophysationketul373
 

What's hot (20)

Fish Migration
Fish MigrationFish Migration
Fish Migration
 
FINS IN FISHES ZOOLOGY.pptx
FINS IN FISHES ZOOLOGY.pptxFINS IN FISHES ZOOLOGY.pptx
FINS IN FISHES ZOOLOGY.pptx
 
Origin and evolution of ostracoderms
Origin and evolution of ostracodermsOrigin and evolution of ostracoderms
Origin and evolution of ostracoderms
 
Coldwater fisheries in India
Coldwater fisheries in IndiaColdwater fisheries in India
Coldwater fisheries in India
 
Crustacean parasite
Crustacean parasiteCrustacean parasite
Crustacean parasite
 
The curious evolution of electroreception in fish, amphibians, and monotremes...
The curious evolution of electroreception in fish, amphibians, and monotremes...The curious evolution of electroreception in fish, amphibians, and monotremes...
The curious evolution of electroreception in fish, amphibians, and monotremes...
 
Parental care in fishes
Parental care in fishesParental care in fishes
Parental care in fishes
 
Induced breeding in fishes
Induced breeding in fishesInduced breeding in fishes
Induced breeding in fishes
 
Hybridization in fishes
Hybridization in fishesHybridization in fishes
Hybridization in fishes
 
3...cryopreservation
3...cryopreservation3...cryopreservation
3...cryopreservation
 
Comparative account of jaw suspension
Comparative account of jaw suspensionComparative account of jaw suspension
Comparative account of jaw suspension
 
indused breeding for fish
indused breeding for fishindused breeding for fish
indused breeding for fish
 
Fish reproduction
Fish reproductionFish reproduction
Fish reproduction
 
MIGRATION OF FISHES
MIGRATION OF FISHESMIGRATION OF FISHES
MIGRATION OF FISHES
 
Larval form of mollusca
Larval form of molluscaLarval form of mollusca
Larval form of mollusca
 
Fish locomotion Notes
Fish locomotion NotesFish locomotion Notes
Fish locomotion Notes
 
Natural fish seed collection
Natural fish seed collectionNatural fish seed collection
Natural fish seed collection
 
Introduction to Labeo rohita
Introduction to Labeo rohitaIntroduction to Labeo rohita
Introduction to Labeo rohita
 
Endocrine system of fishes ppt
Endocrine  system of fishes  pptEndocrine  system of fishes  ppt
Endocrine system of fishes ppt
 
Hypophysation
HypophysationHypophysation
Hypophysation
 

Viewers also liked

The effects of low and high frequencies on
The effects of low and high frequencies onThe effects of low and high frequencies on
The effects of low and high frequencies onzs2727
 
Hispanic Consumers in MI Retail
Hispanic Consumers in MI RetailHispanic Consumers in MI Retail
Hispanic Consumers in MI RetailThe Hispanic Way
 
Afasia de broca1
Afasia de broca1Afasia de broca1
Afasia de broca1Catita2017
 
Institucional Forma Mídias
Institucional Forma MídiasInstitucional Forma Mídias
Institucional Forma MídiasForma Mídias
 
클래스팅 에듀포럼_박민, 박상용, 최고은선생님
클래스팅 에듀포럼_박민, 박상용, 최고은선생님클래스팅 에듀포럼_박민, 박상용, 최고은선생님
클래스팅 에듀포럼_박민, 박상용, 최고은선생님Classting
 
filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...
filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...
filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...gabriela0702
 
Dental Biomaterials _ ISNC_ key points
Dental Biomaterials _ ISNC_ key pointsDental Biomaterials _ ISNC_ key points
Dental Biomaterials _ ISNC_ key pointsOlla BaEissa
 
창의적 발상 15116350 최문정
창의적 발상 15116350 최문정창의적 발상 15116350 최문정
창의적 발상 15116350 최문정choi mun jeong
 
Dental Biomaterials _ ISNC_key points
Dental Biomaterials _ ISNC_key pointsDental Biomaterials _ ISNC_key points
Dental Biomaterials _ ISNC_key pointsOlla BaEissa
 
Como contamina el pet
Como contamina el petComo contamina el pet
Como contamina el pettania22vargas
 

Viewers also liked (15)

The effects of low and high frequencies on
The effects of low and high frequencies onThe effects of low and high frequencies on
The effects of low and high frequencies on
 
Hispanic Consumers in MI Retail
Hispanic Consumers in MI RetailHispanic Consumers in MI Retail
Hispanic Consumers in MI Retail
 
Afasia de broca1
Afasia de broca1Afasia de broca1
Afasia de broca1
 
Institucional Forma Mídias
Institucional Forma MídiasInstitucional Forma Mídias
Institucional Forma Mídias
 
클래스팅 에듀포럼_박민, 박상용, 최고은선생님
클래스팅 에듀포럼_박민, 박상용, 최고은선생님클래스팅 에듀포럼_박민, 박상용, 최고은선생님
클래스팅 에듀포럼_박민, 박상용, 최고은선생님
 
Saving the Family Barn - Bob Neier
Saving the Family Barn - Bob NeierSaving the Family Barn - Bob Neier
Saving the Family Barn - Bob Neier
 
filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...
filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...
filtros,ordenadores,ordenadores por criterio,tablas dinámicas y esquema por a...
 
Dental Biomaterials _ ISNC_ key points
Dental Biomaterials _ ISNC_ key pointsDental Biomaterials _ ISNC_ key points
Dental Biomaterials _ ISNC_ key points
 
LAV SUNUM
LAV SUNUMLAV SUNUM
LAV SUNUM
 
창의적 발상 15116350 최문정
창의적 발상 15116350 최문정창의적 발상 15116350 최문정
창의적 발상 15116350 최문정
 
Yolo
YoloYolo
Yolo
 
Dental Biomaterials _ ISNC_key points
Dental Biomaterials _ ISNC_key pointsDental Biomaterials _ ISNC_key points
Dental Biomaterials _ ISNC_key points
 
Captura de formulas
Captura de formulasCaptura de formulas
Captura de formulas
 
Captura de formulas
Captura de formulasCaptura de formulas
Captura de formulas
 
Como contamina el pet
Como contamina el petComo contamina el pet
Como contamina el pet
 

Similar to ELECTROGENESIS IN FISHES By ABDUR ROUF SAMIM

How do fish make electricity
How do fish make electricityHow do fish make electricity
How do fish make electricityAlicia Garcia
 
How do fish make electricity
How do fish make electricityHow do fish make electricity
How do fish make electricityAlicia Garcia
 
Sources of bioelectric potentials
Sources of bioelectric potentialsSources of bioelectric potentials
Sources of bioelectric potentialsGhansyam Rathod
 
Elf on the excitable cell
Elf on the excitable cellElf on the excitable cell
Elf on the excitable cellMohmmed
 
Topic 2 sources of bioelectric potentials
Topic 2 sources of bioelectric potentialsTopic 2 sources of bioelectric potentials
Topic 2 sources of bioelectric potentialsGhansyam Rathod
 
Evolution Of The Nervous System
Evolution Of The Nervous SystemEvolution Of The Nervous System
Evolution Of The Nervous Systemvacagodx
 
HIS 125 Electrical Potentials, Hair Cells, and the Eighth Nerve
HIS 125 Electrical Potentials, Hair Cells, and the Eighth NerveHIS 125 Electrical Potentials, Hair Cells, and the Eighth Nerve
HIS 125 Electrical Potentials, Hair Cells, and the Eighth NerveRebecca Krouse
 
Magnetic resonance
Magnetic resonanceMagnetic resonance
Magnetic resonanceSteve John
 
Physiological Effects Of Microcurrent On The Body Peter Lathrop
Physiological Effects Of Microcurrent On The Body   Peter LathropPhysiological Effects Of Microcurrent On The Body   Peter Lathrop
Physiological Effects Of Microcurrent On The Body Peter Lathropdrpeterlathrop
 
Sustainable electric energy micro generation system based on electric
Sustainable electric energy micro generation system based on electricSustainable electric energy micro generation system based on electric
Sustainable electric energy micro generation system based on electricSuyog Nawalkar
 
Applications of physics in biology
Applications of physics in biologyApplications of physics in biology
Applications of physics in biologyWaqar Majeed
 
Information Can Control Behavior Without Creating A...
Information Can Control Behavior Without Creating A...Information Can Control Behavior Without Creating A...
Information Can Control Behavior Without Creating A...Candice Him
 
Bioelectromagnetisim presention
Bioelectromagnetisim presentionBioelectromagnetisim presention
Bioelectromagnetisim presentionAdil Muhammad
 
F. non al howanimpercworld-todo
F. non al howanimpercworld-todoF. non al howanimpercworld-todo
F. non al howanimpercworld-todorjhoage
 
4 q periodic exam reviewer (answers to d. t. crisologo's guide questions)
4 q   periodic exam reviewer (answers to d. t. crisologo's guide questions)4 q   periodic exam reviewer (answers to d. t. crisologo's guide questions)
4 q periodic exam reviewer (answers to d. t. crisologo's guide questions)Ferdinand, Jr. Sta. Ana
 

Similar to ELECTROGENESIS IN FISHES By ABDUR ROUF SAMIM (20)

Electric organ in Torpedo
Electric organ in TorpedoElectric organ in Torpedo
Electric organ in Torpedo
 
How do fish make electricity
How do fish make electricityHow do fish make electricity
How do fish make electricity
 
How do fish make electricity
How do fish make electricityHow do fish make electricity
How do fish make electricity
 
Sources of bioelectric potentials
Sources of bioelectric potentialsSources of bioelectric potentials
Sources of bioelectric potentials
 
Elf on the excitable cell
Elf on the excitable cellElf on the excitable cell
Elf on the excitable cell
 
Topic 2 sources of bioelectric potentials
Topic 2 sources of bioelectric potentialsTopic 2 sources of bioelectric potentials
Topic 2 sources of bioelectric potentials
 
Evolution Of The Nervous System
Evolution Of The Nervous SystemEvolution Of The Nervous System
Evolution Of The Nervous System
 
HIS 125 Electrical Potentials, Hair Cells, and the Eighth Nerve
HIS 125 Electrical Potentials, Hair Cells, and the Eighth NerveHIS 125 Electrical Potentials, Hair Cells, and the Eighth Nerve
HIS 125 Electrical Potentials, Hair Cells, and the Eighth Nerve
 
Magnetic resonance
Magnetic resonanceMagnetic resonance
Magnetic resonance
 
Physiological Effects Of Microcurrent On The Body Peter Lathrop
Physiological Effects Of Microcurrent On The Body   Peter LathropPhysiological Effects Of Microcurrent On The Body   Peter Lathrop
Physiological Effects Of Microcurrent On The Body Peter Lathrop
 
electric eel
electric eelelectric eel
electric eel
 
1. Dissertation
1. Dissertation1. Dissertation
1. Dissertation
 
Sustainable electric energy micro generation system based on electric
Sustainable electric energy micro generation system based on electricSustainable electric energy micro generation system based on electric
Sustainable electric energy micro generation system based on electric
 
Topic 2 biopotentials
Topic 2 biopotentialsTopic 2 biopotentials
Topic 2 biopotentials
 
Applications of physics in biology
Applications of physics in biologyApplications of physics in biology
Applications of physics in biology
 
Information Can Control Behavior Without Creating A...
Information Can Control Behavior Without Creating A...Information Can Control Behavior Without Creating A...
Information Can Control Behavior Without Creating A...
 
Bioelectromagnetisim presention
Bioelectromagnetisim presentionBioelectromagnetisim presention
Bioelectromagnetisim presention
 
F. non al howanimpercworld-todo
F. non al howanimpercworld-todoF. non al howanimpercworld-todo
F. non al howanimpercworld-todo
 
Gourov and Curran 2014
Gourov and Curran 2014Gourov and Curran 2014
Gourov and Curran 2014
 
4 q periodic exam reviewer (answers to d. t. crisologo's guide questions)
4 q   periodic exam reviewer (answers to d. t. crisologo's guide questions)4 q   periodic exam reviewer (answers to d. t. crisologo's guide questions)
4 q periodic exam reviewer (answers to d. t. crisologo's guide questions)
 

More from SYED ASSIM HAQ

Nematode Excretory System: Structure & Significance By SUNDUS SUHAIL
Nematode Excretory System: Structure & Significance By SUNDUS SUHAILNematode Excretory System: Structure & Significance By SUNDUS SUHAIL
Nematode Excretory System: Structure & Significance By SUNDUS SUHAILSYED ASSIM HAQ
 
Predatory nematodes by AALIYA TAIYAB
Predatory nematodes by AALIYA TAIYABPredatory nematodes by AALIYA TAIYAB
Predatory nematodes by AALIYA TAIYABSYED ASSIM HAQ
 
Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...
Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...
Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...SYED ASSIM HAQ
 
Classification of Plants and Animals By SYED AASIM HAQ
Classification of Plants and Animals By SYED AASIM HAQClassification of Plants and Animals By SYED AASIM HAQ
Classification of Plants and Animals By SYED AASIM HAQSYED ASSIM HAQ
 
FISHERIES OF JAMMU AND KASHMIR By MOHSIN ALI
FISHERIES OF JAMMU AND KASHMIR By MOHSIN ALIFISHERIES OF JAMMU AND KASHMIR By MOHSIN ALI
FISHERIES OF JAMMU AND KASHMIR By MOHSIN ALISYED ASSIM HAQ
 
Fish And Fisheries Of River Ganga By ANKITA
Fish And Fisheries Of River Ganga By ANKITAFish And Fisheries Of River Ganga By ANKITA
Fish And Fisheries Of River Ganga By ANKITASYED ASSIM HAQ
 
Parental care in fishes By TANZEEBA AMIN
Parental care in fishes By TANZEEBA AMINParental care in fishes By TANZEEBA AMIN
Parental care in fishes By TANZEEBA AMINSYED ASSIM HAQ
 
Ornamental fishes and maintainance of aquculture by irfan paswal
Ornamental fishes and maintainance of aquculture by irfan paswalOrnamental fishes and maintainance of aquculture by irfan paswal
Ornamental fishes and maintainance of aquculture by irfan paswalSYED ASSIM HAQ
 
Fish by products ; by UMAIYA FAROOQ
Fish by products  ; by UMAIYA FAROOQFish by products  ; by UMAIYA FAROOQ
Fish by products ; by UMAIYA FAROOQSYED ASSIM HAQ
 
COLORATION IN FISHES: its Regulation and significance by GAZEE OWAIS
COLORATION IN FISHES:  its Regulation and  significance by GAZEE OWAIS COLORATION IN FISHES:  its Regulation and  significance by GAZEE OWAIS
COLORATION IN FISHES: its Regulation and significance by GAZEE OWAIS SYED ASSIM HAQ
 
Alimentary canal and feeding adaptations in fishes by nusrit
Alimentary canal and feeding adaptations in fishes by nusritAlimentary canal and feeding adaptations in fishes by nusrit
Alimentary canal and feeding adaptations in fishes by nusritSYED ASSIM HAQ
 
Cluture of pearl oyster by SYED AASIM HAQ
Cluture of pearl oyster by SYED AASIM HAQCluture of pearl oyster by SYED AASIM HAQ
Cluture of pearl oyster by SYED AASIM HAQSYED ASSIM HAQ
 
Ecology by syed asim haq
Ecology by syed asim haqEcology by syed asim haq
Ecology by syed asim haqSYED ASSIM HAQ
 
Structure of DNA by syed aasim haq
Structure of DNA by syed aasim haqStructure of DNA by syed aasim haq
Structure of DNA by syed aasim haqSYED ASSIM HAQ
 
Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...
Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...
Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...SYED ASSIM HAQ
 

More from SYED ASSIM HAQ (15)

Nematode Excretory System: Structure & Significance By SUNDUS SUHAIL
Nematode Excretory System: Structure & Significance By SUNDUS SUHAILNematode Excretory System: Structure & Significance By SUNDUS SUHAIL
Nematode Excretory System: Structure & Significance By SUNDUS SUHAIL
 
Predatory nematodes by AALIYA TAIYAB
Predatory nematodes by AALIYA TAIYABPredatory nematodes by AALIYA TAIYAB
Predatory nematodes by AALIYA TAIYAB
 
Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...
Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...
Exploring ‘’Type 2 diabetes’’ using Drosophila as a study model By MOHD SAIFU...
 
Classification of Plants and Animals By SYED AASIM HAQ
Classification of Plants and Animals By SYED AASIM HAQClassification of Plants and Animals By SYED AASIM HAQ
Classification of Plants and Animals By SYED AASIM HAQ
 
FISHERIES OF JAMMU AND KASHMIR By MOHSIN ALI
FISHERIES OF JAMMU AND KASHMIR By MOHSIN ALIFISHERIES OF JAMMU AND KASHMIR By MOHSIN ALI
FISHERIES OF JAMMU AND KASHMIR By MOHSIN ALI
 
Fish And Fisheries Of River Ganga By ANKITA
Fish And Fisheries Of River Ganga By ANKITAFish And Fisheries Of River Ganga By ANKITA
Fish And Fisheries Of River Ganga By ANKITA
 
Parental care in fishes By TANZEEBA AMIN
Parental care in fishes By TANZEEBA AMINParental care in fishes By TANZEEBA AMIN
Parental care in fishes By TANZEEBA AMIN
 
Ornamental fishes and maintainance of aquculture by irfan paswal
Ornamental fishes and maintainance of aquculture by irfan paswalOrnamental fishes and maintainance of aquculture by irfan paswal
Ornamental fishes and maintainance of aquculture by irfan paswal
 
Fish by products ; by UMAIYA FAROOQ
Fish by products  ; by UMAIYA FAROOQFish by products  ; by UMAIYA FAROOQ
Fish by products ; by UMAIYA FAROOQ
 
COLORATION IN FISHES: its Regulation and significance by GAZEE OWAIS
COLORATION IN FISHES:  its Regulation and  significance by GAZEE OWAIS COLORATION IN FISHES:  its Regulation and  significance by GAZEE OWAIS
COLORATION IN FISHES: its Regulation and significance by GAZEE OWAIS
 
Alimentary canal and feeding adaptations in fishes by nusrit
Alimentary canal and feeding adaptations in fishes by nusritAlimentary canal and feeding adaptations in fishes by nusrit
Alimentary canal and feeding adaptations in fishes by nusrit
 
Cluture of pearl oyster by SYED AASIM HAQ
Cluture of pearl oyster by SYED AASIM HAQCluture of pearl oyster by SYED AASIM HAQ
Cluture of pearl oyster by SYED AASIM HAQ
 
Ecology by syed asim haq
Ecology by syed asim haqEcology by syed asim haq
Ecology by syed asim haq
 
Structure of DNA by syed aasim haq
Structure of DNA by syed aasim haqStructure of DNA by syed aasim haq
Structure of DNA by syed aasim haq
 
Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...
Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...
Trophic ecology of fishes,polyculture, fish food analysis and fish deformitie...
 

Recently uploaded

Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfMaximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfTechSoup
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRATanmoy Mishra
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationMJDuyan
 
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptxSandy Millin
 
The basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxThe basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxheathfieldcps1
 
Diploma in Nursing Admission Test Question Solution 2023.pdf
Diploma in Nursing Admission Test Question Solution 2023.pdfDiploma in Nursing Admission Test Question Solution 2023.pdf
Diploma in Nursing Admission Test Question Solution 2023.pdfMohonDas
 
How to Add a many2many Relational Field in Odoo 17
How to Add a many2many Relational Field in Odoo 17How to Add a many2many Relational Field in Odoo 17
How to Add a many2many Relational Field in Odoo 17Celine George
 
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptxPISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptxEduSkills OECD
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...raviapr7
 
How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17Celine George
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice documentXsasf Sfdfasd
 
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdfP4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdfYu Kanazawa / Osaka University
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...CaraSkikne1
 
Prescribed medication order and communication skills.pptx
Prescribed medication order and communication skills.pptxPrescribed medication order and communication skills.pptx
Prescribed medication order and communication skills.pptxraviapr7
 
Philosophy of Education and Educational Philosophy
Philosophy of Education  and Educational PhilosophyPhilosophy of Education  and Educational Philosophy
Philosophy of Education and Educational PhilosophyShuvankar Madhu
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapitolTechU
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxKatherine Villaluna
 
Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.raviapr7
 

Recently uploaded (20)

Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfMaximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive Education
 
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
 
The basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxThe basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptx
 
Diploma in Nursing Admission Test Question Solution 2023.pdf
Diploma in Nursing Admission Test Question Solution 2023.pdfDiploma in Nursing Admission Test Question Solution 2023.pdf
Diploma in Nursing Admission Test Question Solution 2023.pdf
 
How to Add a many2many Relational Field in Odoo 17
How to Add a many2many Relational Field in Odoo 17How to Add a many2many Relational Field in Odoo 17
How to Add a many2many Relational Field in Odoo 17
 
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptxPISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...
 
How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17How to Add Existing Field in One2Many Tree View in Odoo 17
How to Add Existing Field in One2Many Tree View in Odoo 17
 
Finals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quizFinals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quiz
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice document
 
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdfP4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...
 
Prescribed medication order and communication skills.pptx
Prescribed medication order and communication skills.pptxPrescribed medication order and communication skills.pptx
Prescribed medication order and communication skills.pptx
 
Philosophy of Education and Educational Philosophy
Philosophy of Education  and Educational PhilosophyPhilosophy of Education  and Educational Philosophy
Philosophy of Education and Educational Philosophy
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptx
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptx
 
Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.Drug Information Services- DIC and Sources.
Drug Information Services- DIC and Sources.
 

ELECTROGENESIS IN FISHES By ABDUR ROUF SAMIM

  • 1. ELECTROGENESIS IN FISHES ABDUR ROUF SAMIM M.Sc.(Final) FISHERY SCIENCE AND AQUACULTURE
  • 2. INTRODUCTION  Electrogenesis refers to the production of electrical impulses in the tissues of a living organism.  Observed in all animals such as fishes, reptiles, and mammals etc.
  • 3. TYPES OY ELECTRIC FISHES  Strongly electric fishes Example: Torpedo, Electrophorus etc.  Weakly electric fishes Example: Raja, Gymnotus etc. RajaElectrophorus
  • 4.  Electric organs are organs specialized for the production of an electric field outside the body.  Built up from a large number of disc like cells, called electroplates.  Electroplates embedded in a jelly like extracellular material and enclosed within a compartment of connective tissue. Diagram showing electric organs ELECTRIC ORGANS
  • 5. DISTRIBUTION OF ELECTRIC ORGANS Name of fishes Shape of electric organ Location of electric organ Torpedo Flat kidney shape On either side of mid-line Malapterurus Lozenge-shape Located in skin Raja (String ray) Spindle-shape Lying parallel to the spinal cord in the tail Torpedo Raja
  • 6. PATTERNS OF ELECTRIC ORGAN DISCHARGES  Monophasic pulses  Biphasic pulses  Polyphasic pulses
  • 7. KINDS OF ELECTRIC ORGAN DISCHARGE  Electrophorus: one small pulse followed by four large pulse.  Electric shark: repetition of sequence of events.  Torpedo: four large pulses which are continuously repeated.
  • 8. MECHANISM OF ELECTRIC ORGAN DISCHARGE + + + + + + + _ _ _ _ _ _ _ + + - - - + + + - - + + + - - - _ _ _ _ _ _ _ + + + + + + + Resting phase Action Potential Spike stage
  • 9. Receptor Sensory Nerve Fibre Brain Optic Nerve Electric Organ Motor Nerve 1 2 Pathways of neural control of electric organ
  • 10. FUNCTION OF ELECTRIC ORGAN  Food procurement  Defense  Species and sex recognition  Direction finding  Communication  Navigation
  • 11. WHY ARE FISHES IMMUNE TO THEIR OWN ELECTRIC CURRENT ?  Got myolated nerve fibers with high degree of insulation.  Excitatory muscle fibers have high threshold of excitation.
  • 12. References  www.wired.com  www.elguanche.info  www.revolvy.com  www.keywordsuggests.org  Brown, animal physiology ,2nd volume.  Notes provided by Prof. Mukhtar Ahmad Khan.