Tag Archive: sexual maturation

Oct 11 2017

Fish hatchery management (2017 – updated)

This lecture on fish hatchery started with general information related to the modes of reproduction in various groups of aquatic organisms as illustrated by pictures and tables highlighting the significant differences of reproduction among various fish groups ranging from scattering eggs to giving birth passing by fecundity, parental care and other reproduction parameters. The focus …

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Permanent link to this article: http://fishconsult.org/?p=14168

Feb 01 2017

Fly River turtle (Description- biology- threats)- Video

This video was filmed at the Sea World (San Diego, California) during January 2015 Ownership of the video and review: Abdel Rahman El Gamal (Founder of the video channel)     General: Fly River Turtles (Carettochelys insculpta), are also known, as pitted-shelled turtle and also as “pig-nosed turtle” because of their bulbous fleshy shout with prominently …

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Permanent link to this article: http://fishconsult.org/?p=13830

May 04 2015

Walrus (Odobenus rosmarus)- Part III (Eating habits – reproduction – utilization)- Video

This video was filmed during December 2014 in the Sea World, San Diego, California, USA. Review: Abdel Rahman El Gamal (Founder of the video channel) Eating habits and food preferences Walruses have a diverse diet and feed on many marine organisms such as shrimp, crabs, sea cucumbers, various mollusks and other benthic invertebrates (e.g. worms, …

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Permanent link to this article: http://fishconsult.org/?p=12593

Jun 11 2014

Hawksbill sea turtle, Eretmochelys imbricata (Description – feeding – reproduction) – Video

Credit for the video: Glenda Vélez Calabria (Colombia) Review: Abdel Rahman El Gamal (Site and video channel founder) This video was filmed at mundo marino and te mostramos lo que pasa en el fondo, Colombia Introduction: The hawksbill sea turtle (Eretmochelys imbricata) which belongs to the family Cheloniidae has a worldwide distribution and occur in tropical and subtropical waters …

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Permanent link to this article: http://fishconsult.org/?p=10968

Apr 15 2014

European eel, Anguilla anguilla (Description, feeding, reproduction, threats and conservation)

Credit of the photos: Glenda Vélez Calabria (Colombia) Technical review: Abdel Rahman El Gamal These photos have been taken in the recovery plan of European eel (Spain)   Introduction: The European eel, Anguilla anguilla, is a catadromous snake-like species of eels, that belongs to the family “Anguillidae”. This species is a popular food fish of high …

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Permanent link to this article: http://fishconsult.org/?p=10716

Oct 14 2013

Hatchery management (updated 2013 version)

The presentation starts with a fact sheet related to fish reproduction. Mode of fish production has been addressed and also the rationality of collecting fish production and fish seeds with a comparison with hatchery produced seeds. Fish sexual maturation in relation to influencing factors has been discussed in this presentation. Hatchery management is adequately addressed …

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Permanent link to this article: http://fishconsult.org/?p=9497

Jul 24 2013

Peces cultivados en Panamá, Colossoma O Cachams (Colossoma macropomum) en Panama – In Spanish

Credit: Rosa Libia Bellido (Panama) COLOSSOMA O CACHAMA, (Colossoma macropomum) CARACTERÍSTICAS: Es un pez frugívoro (se alimenta de frutas como mango, guayaba, naranja, etc) Acepta bien el alimento concentrado balanceado Alcanza un buen crecimiento con vísceras de pollo, pescado y otras Posee un crecimiento rápido en agua calientes mayor de 30 ºC Se reproduce artificialmente una vez al …

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Permanent link to this article: http://fishconsult.org/?p=8491

Oct 22 2012

Gilded catfish, Zungaro zungaro in Bolivia

Photo credit: Felipe Alviz Costa (Bolivia)        Description: Abdel Rahman El Gamal This catfish species has several common names such as giant Jelly Catfish, Gilded Catfish and Manguruyú (the last one is the Spanish name especially in Argentinian). This species is native to the Amazon and Orinoco River basins in South America. This catfish is mainly …

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Permanent link to this article: http://fishconsult.org/?p=6573

Sep 24 2012

Reproduction of black catfish, Rhamdia quelen in Uruguay – (Broodstock)

Photo credit: Claudia Turra (Uruguay) –  Description: Claudia Turra and Abdel Rahman El Gamal This species, Rhamdia quelen which belongs to the siluridae family is a South American catfish that is known by Black catfish in addition to other local names. The photo shows a broodstock of Black catfish in “Punta Negra” fish farm, Maldonado-Uruguay. The …

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Permanent link to this article: http://fishconsult.org/?p=6003

Nov 03 2011

Sex identification of a tilapia female

The photo shows a female of Nile tilapia, Oreochromis niloticus based on her papilla. For smaller sizes and/or with personnel who are not familiar with tilapia, a dye named as crystal violet may be used to show clearly the papilla.  Note: We decided not to watermark the photos in order not to upset its clarity. …

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Permanent link to this article: http://fishconsult.org/?p=998

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