Patterns of colour inheritance from crossbreeding between Red hybrid tilapia (Oreochromis sp.) and GIFT tilapia (Oreochromis niloticus)

Nwachi, Oster Francis; Esa, Yuzine; Christianus, Annie; Rahim, Anuar Abdul; Kamarudin, Mohd Salleh

doi:10.22438/jeb/41/5(si)/ms_22

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…1992; Pandian and Koteeswaran 1998; Benfey 1999; Arai 2001; Hulata 2001; Maxime 2008; Piferrer et al. 2009; Nwachi and Esa 2016). The lower survival rates are generally attributed to the treatment.…”

Section: Resultsmentioning

confidence: 99%

Initial investigations into the production of triploid sunshine bass using temperature shock

Straus,

Abernathy,

Kelly

et al. 2024

N American J Aquac

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ObjectiveThe sunshine bass (female White Bass Morone chrysops × male Striped Bass M. saxatilis) is an important food fish raised in U.S. aquaculture. Spawning is performed by manually stripping and fertilizing White Bass eggs with Striped Bass sperm. Embryos hatch in approximately 48 h. Mature sunshine bass females can become fertile and produce viable eggs, which is problematic in commercial food‐fish production; therefore, triploid fish are desired.MethodsThe present nonreplicated study incorporated three warm and three cold temperature shocks, along with three postfertilization initiation times and three exposure times for each temperature, during initial stages of incubation to induce triploidy. After exposure to temperature shocks, fertilized eggs were incubated in experimental hatching systems. The best performing cold and warm temperatures and times (and an ambient diploid control) were then used to incubate fertilized eggs in a commercial‐scale trial using standard industry practices with a single batch of eggs. Larvae were stocked at about 185,000 larvae/ha (75,000 larvae/acre) in newly filled and fertilized ponds. Fry were sampled weekly and harvested at 30 days.ResultThere were 15 survivors from the pond containing fish derived from cold‐shocked fertilized eggs; these individuals were tested via Coulter Counter, and no triploids were detected. Testing of 50 survivors from the pond containing fish derived from warm‐shocked fertilized eggs indicated that 14% were triploid.ConclusionTherefore, initial trials indicate that warm temperature shock is preferable to cold shock for inducing a greater percentage of triploid sunshine bass.

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