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Category: Information Bites

This category addresses specific points which are mostly covered in 1-3 power point slides/bite. These bites are helpful whenever specific information is targeted.

Sep 06 2012

Predation efficiency of Nile perch, Lates niloticus

This 2-slide information bite addresses the predation efficiency of Nile perch in relation to its characteristics especially its mouth and gapes. The bite touched the case study of the introduction of Nile perch into Lake Victoria and the impacts of the introduction. The predator-prey relationship has been addressed in this bite which is supported by …

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Permanent link to this article: http://fishconsult.org/?p=5506

Aug 28 2012

Rotifer enrichment in marine hatcheries

Rotifers by itself do not possess high nutritional value.  However, because of their appropriate sizes to the small larvae such as those of marine fish, rotifers have been successfully used in marine hatcheries after been adequately enriched to meet the nutritional demands of target larvae for proper neural development. Brachionus plicatilis is a common rotifer in …

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Permanent link to this article: http://fishconsult.org/?p=5464

Jun 05 2012

Fish aging – general and scale reading

This 2-slide information bite addresses fish aging topic covering its importance and applications in fishery management as well as aquaculture. The main fish aging methods are listed including the reading of scales, opercula, otolith or vertebrae. The focus has been placed on scale reading being the simplest method in fish aging as well as the conditions that …

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Permanent link to this article: http://fishconsult.org/?p=3738

May 19 2012

Integrated rabbit-fish in rural development programs

This information bite addresses the integration between rabbits and aquaculture. Number of rabbits for a specific acreage of a fish pond is recommended based on field observations. The advantages of rabbits in this integrated system have been covered especially in regard to its biological characters, its husbandry and the premium meat quality. The bite recommends …

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Permanent link to this article: http://fishconsult.org/?p=3568

May 17 2012

Selective breeding in fish

The 3-slide bite introduces the concept of fish selection in addition to the additive genetic variance VA. The illustrations included show the selection process over several generations and how means of selected populations move rightward till the selection plateau is reached. [important]Selective breeding in fish[/important]

Permanent link to this article: http://fishconsult.org/?p=3534

May 17 2012

Selection and sexual dimorphism in fish

This single slide began with the definition of sexual dimorphism and the importance of the phenomenon in selection programs. The illustrations as represented in natural distribution for two sexes of a given species demonstrating the necessity of having independent cut-off values for each sex otherwise a particular sex could dominate selected population. [important]Selection and sexual …

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Permanent link to this article: http://fishconsult.org/?p=3528

May 17 2012

Response to selection and selection intensity in fish

This single illustrated slide shows a normal distribution of a population and demonstrates the relationship between the response to selection and the selection differential that is directly related to selection intensity. The concerns about possible impact of small selected portion on inbreeding has been highlighted. [important]Response to selection and selection intensity[/important]

Permanent link to this article: http://fishconsult.org/?p=3523

May 17 2012

Qualitative genetics in fish

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]

Permanent link to this article: http://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 …

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Permanent link to this article: http://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 …

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Permanent link to this article: http://fishconsult.org/?p=3488

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