A M Shokr Elsayed (42 results)

- Softcover
Seller: PBShop.store UK, Fairford, GLOS, United KingdomPBShop.store UK
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- Softcover
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- Softcover
Seller: California Books, Miami, FL, U.S.A.California Books
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- Softcover
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Taschenbuch. Condition: Neu. Physiology and reproduction in fish | Elsayed A. M. Shokr | Taschenbuch | Englisch | 2023 | LAP LAMBERT Academic Publishing | EAN 9786205630594 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu. …

- Softcover
Seller: moluna, Greven, Germanymoluna
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- Softcover
Seller: Mispah books, Redhill, SURRE, United KingdomMispah books
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paperback. Condition: New. NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

- Softcover
Seller: KALAMO BOOKS, Burriana, CS, SpainKALAMO BOOKS
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- Softcover
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- Softcover
Seller: preigu, Osnabrück, Germanypreigu
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Taschenbuch. Condition: Neu. Physiologie et reproduction chez les poissons | Elsayed A. M. Shokr | Taschenbuch | Französisch | 2023 | Editions Notre Savoir | EAN 9786205687093 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu. …

Published by Sciencia Scripts, 2023
- Softcover
Seller: preigu, Osnabrück, Germanypreigu
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Taschenbuch. Condition: Neu. Fiziologiq i razmnozhenie ryb | Elsayed A. M. Shokr | Taschenbuch | Russisch | 2023 | Sciencia Scripts | EAN 9786205687215 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu.…

- Softcover
Seller: moluna, Greven, Germanymoluna
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Condition: New.

- Softcover
Seller: moluna, Greven, Germanymoluna
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US$ 79.50
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Condition: New.

- Softcover
Seller: preigu, Osnabrück, Germanypreigu
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Taschenbuch. Condition: Neu. Fisiologia e reprodução em peixes | Elsayed A. M. Shokr | Taschenbuch | Portugiesisch | 2023 | Edições Nosso Conhecimento | EAN 9786205687154 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu. …

- Softcover
Seller: preigu, Osnabrück, Germanypreigu
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Taschenbuch. Condition: Neu. Fisiologia e riproduzione nei pesci | Elsayed A. M. Shokr | Taschenbuch | Italienisch | 2023 | Edizioni Sapienza | EAN 9786205687109 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu. …

- Softcover
Seller: preigu, Osnabrück, Germanypreigu
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US$ 79.50
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Taschenbuch. Condition: Neu. Physiologie und Reproduktion bei Fischen | Elsayed A. M. Shokr | Taschenbuch | 156 S. | Deutsch | 2023 | Verlag Unser Wissen | EAN 9786205686911 | Verantwortliche Person für die EU: SIA OmniScriptum Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu. …

Language: English
Published by LAP LAMBERT Academic Publishing Jan 2023, 2023
- Softcover
- Print on Demand
Seller: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, GermanyBuchWeltWeit Ludwig Meier e.K.
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US$ 79.50
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Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -All living species of fishes existing in the world at present, a wide variety of patterns of reproduction present as follow, uni-sexuality, bisexuality, hermaphroditism and parthenogenesis. Like other vertebrates, the fishes usually reproduce sexually and in a quite large number of them, spermatozoa and eggs are formed in separate individuals and the gametes are expelled in the water where fertilisation occur. To increase and standardise an efficient hatchery system for producing the young fish of good quality insufficient numbers of a given species, it is essential to know the details of its natural breeding. It involves the study of sexuality of a given fish, sexual dimorphism, reproductive cycle, time, season and place of reproduction. Also, fecundity, spawning pattern, parental care and larval life history. Reproductive physiology of fish (RPF) is a vast scientific field, which directly concerns a set of physiological processes essential for reproduction, beginning with egg fertilisation and ending with sexual behaviour and spawning. Processes include gonad differentiation, puberty, male and female gametogenesi, timing of reproductive cycles. 140 pp. Englisch.…

Published by Sciencia Scripts Feb 2023, 2023
- Softcover
- Print on Demand
Seller: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, GermanyBuchWeltWeit Ludwig Meier e.K.
Contact seller5-star sellerCondition: New
US$ 41.30
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Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -U wseh zhiwyh widow ryb, suschestwuüschih w mire w nastoqschee wremq, prisutstwuüt samye raznoobraznye zakonomernosti razmnozheniq, takie kak odnopolost', dwupolost', germafroditizm i partenogenez. Kak i drugie pozwonochnye, ryby obychno razmnozhaütsq polowym putem, i u dowol'no bol'shogo ih kolichestwa spermatozoidy i ikrinki obrazuütsq otdel'nymi osobqmi, a gamety wybrasywaütsq w wodu, gde proishodit oplodotworenie. Dlq uwelicheniq i standartizacii äffektiwnoj rybowodnoj sistemy dlq polucheniq mal'ka horoshego kachestwa w nedostatochnom kolichestwe dannogo wida neobhodimo znat' detali ego estestwennogo razwedeniq. On predpolagaet izuchenie sexual'nosti dannoj ryby, polowogo dimorfizma, reproduktiwnogo cikla, wremeni, sezona i mesta razmnozheniq. Krome togo, plodowitost', harakter neresta, roditel'skaq zabota i istoriq zhizni lichinok. Reproduktiwnaq fiziologiq ryb (RPF) ¿ obshirnaq nauchnaq oblast', kotoraq neposredstwenno kasaetsq sowokupnosti fiziologicheskih processow, neobhodimyh dlq razmnozheniq, nachinaq s oplodotworeniq ikry i zakanchiwaq polowym powedeniem i nerestom. Processy wklüchaüt differencirowku gonad, polowoe sozrewanie, muzhskoj i zhenskij gametogenez, sinhronizaciü reproduktiwnyh ciklow. 164 pp. Russisch.…

- Softcover
- Print on Demand
Seller: AHA-BUCH GmbH, Einbeck, GermanyAHA-BUCH GmbH
Contact seller5-star sellerCondition: New
US$ 85.92
US$ 39.21 shippingShips from Germany to U.S.A.Quantity: 1 available
Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - All living species of fishes existing in the world at present, a wide variety of patterns of reproduction present as follow, uni-sexuality, bisexuality, hermaphroditism and parthenogenesis. Like other vertebrates, the fishes usually reproduce sexually and in a quite large number of them, spermatozoa and eggs are formed in separate individuals and the gametes are expelled in the water where fertilisation occur. To increase and standardise an efficient hatchery system for producing the young fish of good quality insufficient numbers of a given species, it is essential to know the details of its natural breeding. It involves the study of sexuality of a given fish, sexual dimorphism, reproductive cycle, time, season and place of reproduction. Also, fecundity, spawning pattern, parental care and larval life history. Reproductive physiology of fish (RPF) is a vast scientific field, which directly concerns a set of physiological processes essential for reproduction, beginning with egg fertilisation and ending with sexual behaviour and spawning. Processes include gonad differentiation, puberty, male and female gametogenesi, timing of reproductive cycles.…

- Softcover
- Print on Demand
Seller: Grand Eagle Retail, Bensenville, IL, U.S.A.Grand Eagle Retail
Contact seller5-star sellerCondition: New
US$ 131.60
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Paperback. Condition: new. Paperback. A few fishes breed only once in their long life spawn eg. Pacific salmon . The fresh water eel breeds only once in 10-14 years . Most of the fishes breed in one season every year, they are called seasonal breeders, but some breed in all seasons, through out the year, and they are called year round spawners . - Seasonal breeders exhibit rhythmic changes in the structure and physiology of ovary and testes in different seasons. These changes are demarcated into five phases - 1. Resting phase (December - January) 2. Preparatory phase(February - April) 3. Maturing phase (may - June) 4. Spawning phase (July - September) 5. Post spawning phase(October - November) GONADOSOMATIC INDEX (GSI) - It is a ratio between body weight and the weight of gonad showing the status of ovary and testis in terms of maturity and denotes the phase of the reproductive cycle- GSI = Weight of the gonad 100 Weight of fish-weight of the gonad - GSI of fish increases with the maturation of the fish i.e. lowest during post spawning phase and highest at the peak of maturity i.e. spawning phase.FEMALE REPRODUCTIVE ORGAN - Unlike mammals, the female reproductive system of teleosts. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Language: Spanish
Published by Ediciones Nuestro Conocimiento Feb 2023, 2023
- Softcover
- Print on Demand
Seller: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, GermanyBuchWeltWeit Ludwig Meier e.K.
Contact seller5-star sellerCondition: New
US$ 79.50
US$ 25.76 shippingShips from Germany to U.S.A.Quantity: 2 available
Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Todas las especies vivas de peces existentes en el mundo en la actualidad, presentan una amplia variedad de patrones de reproducción como sigue, uni-sexualidad, bisexualidad, hermafroditismo y partenogénesis. Al igual que otros vertebrados, los peces suelen reproducirse sexualmente y en un número bastante elevado de ellos, los espermatozoides y los óvulos se forman en individuos separados y los gametos son expulsados al agua donde se produce la fecundación. Para aumentar y estandarizar un sistema de criadero eficiente para producir alevines de buena calidad en cantidades insuficientes de una determinada especie, es fundamental conocer los detalles de su crianza natural. Implica el estudio de la sexualidad de un determinado pez, dimorfismo sexual, ciclo reproductivo, tiempo, estación y lugar de reproducción. Además, la fecundidad, el patrón de desove, el cuidado de los padres y la historia de vida de las larvas. La fisiología reproductiva de los peces (RPF) es un vasto campo científico que se relaciona directamente con un conjunto de procesos fisiológicos esenciales para la reproducción, comenzando con la fertilización del huevo y terminando con el comportamiento sexual y el desove. Los procesos incluyen la diferenciación de las gónadas, la pubertad, la gametogénesis masculina y femenina, la sincronización de los ciclos reproductivos. 152 pp. Spanisch.…

Language: English
Published by LAP LAMBERT Academic Publishing Apr 2026, 2026
- Softcover
- Print on Demand
Seller: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, GermanyBuchWeltWeit Ludwig Meier e.K.
Contact seller5-star sellerCondition: New
US$ 116.42
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Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware 276 pp. Englisch.

Language: English
Published by LAP LAMBERT Academic Publishing Jan 2023, 2023
- Softcover
- Print on Demand
Seller: buchversandmimpf2000, Emtmannsberg, BAYE, Germanybuchversandmimpf2000
Contact seller5-star sellerCondition: New
US$ 79.50
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Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Titel. Neuware -All living species of fishes existing in the world at present, a wide variety of patterns of reproduction present as follow, uni-sexuality, bisexuality, hermaphroditism and parthenogenesis. Like other vertebrates, the fishes usually reproduce sexually and in a quite large number of them, spermatozoa and eggs are formed in separate individuals and the gametes are expelled in the water where fertilisation occur. To increase and standardise an efficient hatchery system for producing the young fish of good quality insufficient numbers of a given species, it is essential to know the details of its natural breeding. It involves the study of sexuality of a given fish, sexual dimorphism, reproductive cycle, time, season and place of reproduction. Also, fecundity, spawning pattern, parental care and larval life history. Reproductive physiology of fish (RPF) is a vast scientific field, which directly concerns a set of physiological processes essential for reproduction, beginning with egg fertilisation and ending with sexual behaviour and spawning. Processes include gonad differentiation, puberty, male and female gametogenesi, timing of reproductive cycles.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 140 pp. Englisch.…

- Softcover
- Print on Demand
Seller: AHA-BUCH GmbH, Einbeck, GermanyAHA-BUCH GmbH
Contact seller5-star sellerCondition: New
US$ 122.61
US$ 39.21 shippingShips from Germany to U.S.A.Quantity: 1 available
Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - A few fishes breed only once in their long life spawn eg. Pacific salmon . The fresh water eel breeds only once in 10-14 years . Most of the fishes breed in one season every year , they are called seasonal breeders , but some breed in all seasons, through out the year , and they are called year round spawners . - Seasonal breeders exhibit rhythmic changes in the structure and physiology of ovary and testes in different seasons. These changes are demarcated into five phases - 1. Resting phase (December - January) 2. Preparatory phase(February - April) 3. Maturing phase (may - June) 4. Spawning phase (July - September) 5. Post spawning phase(October - November) GONADOSOMATIC INDEX (GSI) - It is a ratio between body weight and the weight of gonad showing the status of ovary and testis in terms of maturity and denotes the phase of the reproductive cycle- GSI = Weight of the gonad × 100 Weight of fish-weight of the gonad - GSI of fish increases with the maturation of the fish i.e. lowest during post spawning phase and highest at the peak of maturity i.e. spawning phase.FEMALE REPRODUCTIVE ORGAN - Unlike mammals , the female reproductive system of teleosts.…

Language: English
Published by LAP LAMBERT Academic Publishing Apr 2026, 2026
- Softcover
- Print on Demand
Seller: buchversandmimpf2000, Emtmannsberg, BAYE, Germanybuchversandmimpf2000
Contact seller5-star sellerCondition: New
US$ 116.42
US$ 67.21 shippingShips from Germany to U.S.A.Quantity: 1 available
Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Titel. Neuware VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 276 pp. Englisch.

- Softcover
- Print on Demand
Seller: CitiRetail, Stevenage, United KingdomCitiRetail
Contact seller5-star sellerCondition: New
US$ 137.66
US$ 48.97 shippingShips from United Kingdom to U.S.A.Quantity: 1 available
Paperback. Condition: new. Paperback. A few fishes breed only once in their long life spawn eg. Pacific salmon . The fresh water eel breeds only once in 10-14 years . Most of the fishes breed in one season every year, they are called seasonal breeders, but some breed in all seasons, through out the year, and they are called year round spawners . - Seasonal breeders exhibit rhythmic changes in the structure and physiology of ovary and testes in different seasons. These changes are demarcated into five phases - 1. Resting phase (December - January) 2. Preparatory phase(February - April) 3. Maturing phase (may - June) 4. Spawning phase (July - September) 5. Post spawning phase(October - November) GONADOSOMATIC INDEX (GSI) - It is a ratio between body weight and the weight of gonad showing the status of ovary and testis in terms of maturity and denotes the phase of the reproductive cycle- GSI = Weight of the gonad 100 Weight of fish-weight of the gonad - GSI of fish increases with the maturation of the fish i.e. lowest during post spawning phase and highest at the peak of maturity i.e. spawning phase.FEMALE REPRODUCTIVE ORGAN - Unlike mammals, the female reproductive system of teleosts. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

- Softcover
- Print on Demand
Seller: AHA-BUCH GmbH, Einbeck, GermanyAHA-BUCH GmbH
Contact seller5-star sellerCondition: New
US$ 85.92
US$ 39.21 shippingShips from Germany to U.S.A.Quantity: 1 available
Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Todas las especies vivas de peces existentes en el mundo en la actualidad, presentan una amplia variedad de patrones de reproducción como sigue, uni-sexualidad, bisexualidad, hermafroditismo y partenogénesis. Al igual que otros vertebrados, los peces suelen reproducirse sexualmente y en un número bastante elevado de ellos, los espermatozoides y los óvulos se forman en individuos separados y los gametos son expulsados al agua donde se produce la fecundación. Para aumentar y estandarizar un sistema de criadero eficiente para producir alevines de buena calidad en cantidades insuficientes de una determinada especie, es fundamental conocer los detalles de su crianza natural. Implica el estudio de la sexualidad de un determinado pez, dimorfismo sexual, ciclo reproductivo, tiempo, estación y lugar de reproducción. Además, la fecundidad, el patrón de desove, el cuidado de los padres y la historia de vida de las larvas. La fisiología reproductiva de los peces (RPF) es un vasto campo científico que se relaciona directamente con un conjunto de procesos fisiológicos esenciales para la reproducción, comenzando con la fertilización del huevo y terminando con el comportamiento sexual y el desove. Los procesos incluyen la diferenciación de las gónadas, la pubertad, la gametogénesis masculina y femenina, la sincronización de los ciclos reproductivos.…

- Softcover
- Print on Demand
Seller: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, GermanyBuchWeltWeit Ludwig Meier e.K.
Contact seller5-star sellerCondition: New
US$ 79.50
US$ 25.76 shippingShips from Germany to U.S.A.Quantity: 2 available
Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Toutes les espèces vivantes de poissons existant dans le monde à l'heure actuelle, une grande variété de modèles de reproduction présente comme suit, l'uni-sexualité, la bisexualité, l'hermaphrodisme et la parthénogenèse. Comme les autres vertébrés, les poissons se reproduisent généralement sexuellement et chez un assez grand nombre d'entre eux, les spermatozoïdes et les oeufs se forment chez des individus séparés et les gamètes sont expulsés dans l'eau où se produit la fécondation. Pour augmenter et standardiser un système d'écloserie efficace pour produire des alevins de bonne qualité en nombre insuffisant d'une espèce donnée, il est essentiel de connaître les détails de son élevage naturel. Elle implique l'étude de la sexualité d'un poisson donné, du dimorphisme sexuel, du cycle de reproduction, de l'heure, de la saison et du lieu de reproduction. En outre, la fécondité, le modèle de frai, les soins parentaux et l'histoire de la vie larvaire. La physiologie de la reproduction des poissons (RPF) est un vaste domaine scientifique, qui concerne directement un ensemble de processus physiologiques essentiels à la reproduction, commençant par la fécondation des oeufs et se terminant par le comportement sexuel et la ponte. Les processus comprennent la différenciation des gonades, la puberté, la gamétogenèse mâle et femelle, le calendrier des cycles de reproduction. 156 pp. Französisch.…

Language: Spanish
Published by Ediciones Nuestro Conocimiento Feb 2023, 2023
- Softcover
- Print on Demand
Seller: buchversandmimpf2000, Emtmannsberg, BAYE, Germanybuchversandmimpf2000
Contact seller5-star sellerCondition: New
US$ 79.50
US$ 67.21 shippingShips from Germany to U.S.A.Quantity: 1 available
Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Todas las especies vivas de peces existentes en el mundo en la actualidad, presentan una amplia variedad de patrones de reproducción como sigue, uni-sexualidad, bisexualidad, hermafroditismo y partenogénesis. Al igual que otros vertebrados, los peces suelen reproducirse sexualmente y en un número bastante elevado de ellos, los espermatozoides y los óvulos se forman en individuos separados y los gametos son expulsados al agua donde se produce la fecundación. Para aumentar y estandarizar un sistema de criadero eficiente para producir alevines de buena calidad en cantidades insuficientes de una determinada especie, es fundamental conocer los detalles de su crianza natural. Implica el estudio de la sexualidad de un determinado pez, dimorfismo sexual, ciclo reproductivo, tiempo, estación y lugar de reproducción. Además, la fecundidad, el patrón de desove, el cuidado de los padres y la historia de vida de las larvas. La fisiología reproductiva de los peces (RPF) es un vasto campo científico que se relaciona directamente con un conjunto de procesos fisiológicos esenciales para la reproducción, comenzando con la fertilización del huevo y terminando con el comportamiento sexual y el desove. Los procesos incluyen la diferenciación de las gónadas, la pubertad, la gametogénesis masculina y femenina, la sincronización de los ciclos reproductivos.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 152 pp. Spanisch.…

Published by Sciencia Scripts
- Softcover
- Print on Demand
Seller: AHA-BUCH GmbH, Einbeck, GermanyAHA-BUCH GmbH
Contact seller5-star sellerCondition: New
US$ 47.99
US$ 39.21 shippingShips from Germany to U.S.A.Quantity: 1 available
Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - U wseh zhiwyh widow ryb, suschestwuüschih w mire w nastoqschee wremq, prisutstwuüt samye raznoobraznye zakonomernosti razmnozheniq, takie kak odnopolost', dwupolost', germafroditizm i partenogenez. Kak i drugie pozwonochnye, ryby obychno razmnozhaütsq polowym putem, i u dowol'no bol'shogo ih kolichestwa spermatozoidy i ikrinki obrazuütsq otdel'nymi osobqmi, a gamety wybrasywaütsq w wodu, gde proishodit oplodotworenie. Dlq uwelicheniq i standartizacii äffektiwnoj rybowodnoj sistemy dlq polucheniq mal'ka horoshego kachestwa w nedostatochnom kolichestwe dannogo wida neobhodimo znat' detali ego estestwennogo razwedeniq. On predpolagaet izuchenie sexual'nosti dannoj ryby, polowogo dimorfizma, reproduktiwnogo cikla, wremeni, sezona i mesta razmnozheniq. Krome togo, plodowitost', harakter neresta, roditel'skaq zabota i istoriq zhizni lichinok. Reproduktiwnaq fiziologiq ryb (RPF) - obshirnaq nauchnaq oblast', kotoraq neposredstwenno kasaetsq sowokupnosti fiziologicheskih processow, neobhodimyh dlq razmnozheniq, nachinaq s oplodotworeniq ikry i zakanchiwaq polowym powedeniem i nerestom. Processy wklüchaüt differencirowku gonad, polowoe sozrewanie, muzhskoj i zhenskij gametogenez, sinhronizaciü reproduktiwnyh ciklow.…

- Softcover
- Print on Demand
Seller: AHA-BUCH GmbH, Einbeck, GermanyAHA-BUCH GmbH
Contact seller5-star sellerCondition: New
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Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Toutes les espèces vivantes de poissons existant dans le monde à l'heure actuelle, une grande variété de modèles de reproduction présente comme suit, l'uni-sexualité, la bisexualité, l'hermaphrodisme et la parthénogenèse. Comme les autres vertébrés, les poissons se reproduisent généralement sexuellement et chez un assez grand nombre d'entre eux, les spermatozoïdes et les oeufs se forment chez des individus séparés et les gamètes sont expulsés dans l'eau où se produit la fécondation. Pour augmenter et standardiser un système d'écloserie efficace pour produire des alevins de bonne qualité en nombre insuffisant d'une espèce donnée, il est essentiel de connaître les détails de son élevage naturel. Elle implique l'étude de la sexualité d'un poisson donné, du dimorphisme sexuel, du cycle de reproduction, de l'heure, de la saison et du lieu de reproduction. En outre, la fécondité, le modèle de frai, les soins parentaux et l'histoire de la vie larvaire. La physiologie de la reproduction des poissons (RPF) est un vaste domaine scientifique, qui concerne directement un ensemble de processus physiologiques essentiels à la reproduction, commençant par la fécondation des oeufs et se terminant par le comportement sexuel et la ponte. Les processus comprennent la différenciation des gonades, la puberté, la gamétogenèse mâle et femelle, le calendrier des cycles de reproduction.…