This 3-slide bite addresses the field testing of ammonia in fish ponds and describe how the analysis can be reliable and reasonably accurate. The sampling procedures are covered in this illustrated bite. Moreover, the bite addresses incidences of questionable reasons and means of validating the results. This bite introduces to ammonia components which would be …
Category: Lectures and Bites
Permanent link to this article: https://fishconsult.org/?p=7603
Nov 20 2012
Applications of squash technique in sex determination in fish
This 2-slide bite presents the squash technique and its use in sex determination in fish. Examples are given such as sex reversal and progeny testing in tilapia. The same is true in situations whereas the sex of juvenile fish of more species cannot be determined based on fish morphology. The bite also includes the procedures …
Permanent link to this article: https://fishconsult.org/?p=7428
Sep 19 2012
Mariculture development in Gazi Bay, Kenya
Credit: Caroline Wanjiru (Kenya) This document addresses the development of mariculture Gazi Bay, Kenya. The description of the project location is addressed as well as the rationality of the project from social and ecological dimensions. The photos describe the various phases of the project starting by the site selection and ending by the completion of fish …
Permanent link to this article: https://fishconsult.org/?p=5865
Sep 18 2012
Spawning and nursing of sea cucumber Holothuria scabra (sandfish) in Vietnam
Credit: Rayner Pitt (United Kingdom) This file addresses the spawning and nursing of sand fish (Holothuria scabra). Technical components begin with the acquision of sea cucumber broodstock and spawning as well as the facilities required. The management of spawning and nursing operations are covered especially in regard to water management and feeding throughout all phases …
Permanent link to this article: https://fishconsult.org/?p=5844
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 …
Permanent link to this article: https://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 …
Permanent link to this article: https://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 …
Permanent link to this article: https://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 …
Permanent link to this article: https://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: https://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 …
Permanent link to this article: https://fishconsult.org/?p=3528