Unlike many fish species, the sperm can only be obtained by sacrificing a male of African catfish (Clarias gariepinus). Testis is dissected and cut into small pieces whereas the milt used in egg fertilization will be obtained through pressing pieces of the testis out. Note: We decided not to watermark the photos in order not to upset …
Category: Aquaculture
This collection of photos includes various farmed species of fin-fish, shell fish, seaweed and others as well as the farming practices carried out in many countries in the world
Permanent link to this article: https://fishconsult.org/?p=1187
Nov 05 2011
Spawning readiness of African catfish (Clarias gariepinus) female
Determining the spawning readiness of African catfish (Clarias gariepinus) female is assessed based on the softness of female abdomen as shown one photo. Female ovulation could be judged based on the release of few eggs under slight pressure. Females are watched for ovulation and should be stripped and eggs fertilized. Note: We decided not to watermark the photos …
Permanent link to this article: https://fishconsult.org/?p=1178
Nov 05 2011
Extraction of the pituitary gland of African catfish (Clarias gariepinus)
Pituitary gland extract is used in induced reproduction of African catfish (Clarias gariepinus). In order for the pituitary extract to be effective, donor fish should be sexually mature whether male or female. Also, the extraction of pituitary gland is preferred to be close to or within the spawning season. Note: We decided not to watermark …
Permanent link to this article: https://fishconsult.org/?p=1171
Permanent link to this article: https://fishconsult.org/?p=1161
Permanent link to this article: https://fishconsult.org/?p=1155
Nov 05 2011
Reddish coloration of Nile tilapia males during the spawning season
During the spawning season of Nile tilapia (Oreochromis niloticus) develop reddish coloration as secondary sex characteristics. One of the attached photos shows clearly the male coloration during the spawning season while the second photo shows the color difference between male and female of Nile tilapia. Note: We decided not to watermark the photos in order not to upset …
Permanent link to this article: https://fishconsult.org/?p=1143
Nov 05 2011
Tilapia farming in water reservoirs of horticulture farms in Egypt
This integration approach has been adopted by some horticulture farms such as gouva and banana. Economic indications are promising. Fertile water when used in horticulture farm would reduced the demand for chemical fertilizers and hence improve the economics of the horticulture farm. In fact, if the right match between fish biomass and horticulture acreage, this …
Permanent link to this article: https://fishconsult.org/?p=1130
Permanent link to this article: https://fishconsult.org/?p=1122
Nov 05 2011
Integrated duck-fish farming
The compatibility between ducks and fish in such integrated system is of top importance bearing in mind that while ducks are warm blooded animals, fish are cold blooded animals. Therefore proper management should be in place including stocking times and rates. For example, when such integrated system is applied in warm water aquaculture in temperate countries, …
Permanent link to this article: https://fishconsult.org/?p=1101
Nov 05 2011
Integrated rice-fish culture
A well-known model of integrated aquaculture-agriculture which has been practiced in countries whereas rice is a key crop. In Egypt, this integrated system is carried out with the support of the government whereas common carp (Cyprinus carpio) is delivered to contributing farms at no cost. The economic advantages of such integrated system include the increase of rice …
Permanent link to this article: https://fishconsult.org/?p=1100