This 2-slide bite defines the qualitative genetics in fish and its inheritence focusing on some examples in ornamental fish as well as in aquaculture as well as highlighting the nil influence of environment on the qualitative traits. [important]Qualitative genetics in fish[/important]
Category: Language
Describe publication item language
Permanent link to this article: https://fishconsult.org/?p=3516
May 14 2012
Fish selection (trend and plateau)
This information bite illustrates the accumulated gain over generations through selection. The bite also describes the factors that influence the response to selection which are namely heritability coefficient and selection differential. The illustration shows the declining gain (response to selection) till reaching the plateau whereas no gain could be achieved unless variation is created naturally …
Permanent link to this article: https://fishconsult.org/?p=3497
May 13 2012
Genetic Environment Interaction (GxE) in Fish
This illustrated bite shows how the growth rate of two strains of a given species when grown in two different farming environments. The examples of the “No GxE) as well as the existence of the GxE has been illustrated. The two experimental environments are defined. The bite emphasized that these information should result of well designed experiment …
Permanent link to this article: https://fishconsult.org/?p=3488
Apr 30 2012
Fish predation in the wild (Video)
This video shows a predation case in the wild. The video shows the relationship between the predator and the prey. The freshness of the prey as shown in the video indicates the immediate action of predation. The video has been taken in Alexandria, Egypt
Permanent link to this article: https://fishconsult.org/?p=3440
Apr 30 2012
Incubating the embryos of African catfish, Clarias gariepinus (Video)
This video shows a hatchery of African catfish, Clarias gariepinus. Artificial reproduction of African catfish is now carried out at commercial level in several hatcheries in Egypt. The video shows the incubators of catfish embryos whereas water is supplied from the bottom and drains from screened windows near the top of the incubators.
Permanent link to this article: https://fishconsult.org/?p=3448
Apr 30 2012
Fouling of tilapia cages in Rayaan Depressions, Fayoum, Egypt (Video)
The video which has been taken in Rayaan Depression in Fayoum, Egypt. Cage farming has been banned in River Nile while some cages have been licensed for practicing in Rayaan depression for Nile tilapia farming. The video shows several piles of fouling aquatic plants. The periodic maintenance of cages is necessary in order to maintain …
Permanent link to this article: https://fishconsult.org/?p=3442
Apr 30 2012
Tilapia cages in Rayaan Depressions, Fayoum (Egypt) – Video
This video shows a unit of cages located in Rayaan Depression, Fayoum, Egypt. Demand feeders are commonly used in cages. As we see in the video, demand feeders are covered to avoid feed loss by birds.
Permanent link to this article: https://fishconsult.org/?p=3450
Apr 30 2012
Hand grading of harvested tilapia in a commercial tilapia farm in Egypt (Video)
The video has been taken in a commercial fish farm for Nile tilapia, Oreochromis niloticus. Farm crew is sorting fish in size grades although as shown in the video that the majority of harvested fish falls in the premium size. It worth mentioning that prices vary significantly according to size grades.
Permanent link to this article: https://fishconsult.org/?p=3446
Apr 30 2012
A small-scale fish feed mill in India (Video)
Credit: Indian fish farmers and Raju (India) Feed preparation at farm level using different locally available raw materials was a common practice in the olden days. Now a day, farmers prefer to go for using floating pellets in carp farming. Some big feed manufacturing companies supply the formulated feed which may not be have the …
Permanent link to this article: https://fishconsult.org/?p=3366
Apr 28 2012
Longevity in Fishes
This large bite does not only address the definition of longevity and related terms (e.g. lifespan) but also covers with examples the factors affecting longevity. For a valid illustration, a Table with maximum longevity has been included whereas clear differences among various fish groups could be easily noticed. The application of longevity in fishery and aquaculture practices has …
Permanent link to this article: https://fishconsult.org/?p=3431