Morphological abnormalities as a result of inbreeding in controlled reproduction in Oreochromis niloticus, Linnaeus, 1757

Alexandru, Vitalaru Bogdan; Cotor, G.; Ioniţă, Lucian; Alin, Birtoiu Ion

doi:10.1016/j.jbiotec.2014.07.063

Cited by 2 publications

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“…Reproduction occurred in distinct forms across the Nile tilapia varieties, as also observed by Almeida et al (2013). Only half of the females of the inbred AquaAmérica variety spawned, revealing a possible effect of inbreeding on reproduction, similarly to the findings reported by Alexandru et al (2014). The non-inbred AquaAmérica variety produced smaller and lighter eggs but a higher relative number of eggs than the other genetic groups.…”

Section: Discussionsupporting

confidence: 71%

“…However, selective breeding for weight at harvest (the main goal of fish breeding programs) may compromise reproductive traits, as observed in 12 selection generations of the GIFT variety in Malasya (Trong et al, 2013). Moreover, selection may lead to increased inbreeding, affecting reproductive traits (Alexandru et al, 2014). These situations reinforce the importance of monitoring reproductive traits in selection generations aimed at weight at harvest.…”

Section: Introductionmentioning

confidence: 99%

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Reproductive traits in different Nile tilapia genetic groups

Silva

Filho

Ventura

et al. 2020

Arq. Bras. Med. Vet. Zootec.

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The aim of this study was to evaluate the reproductive traits of the non-inbred and inbred AquaAmérica, GIFT and AquaAmérica × GIFTgenetic groups. Six fish from each genetic group were used (2 females:1 male). Females were examined for the presence of eggs in their mouth at every four days, for 12 weeks. Reproduction occurred in all genetic groups (GIFT: 100%; non-inbred AquaAmérica and AquaAmérica ×GIFT: 75%; inbred AquaAmérica: 50%). Female weight, female standard length, total spawning weight, absolute fecundity, relative fecundity, spawn index and hatching rate did not differ significantly between the genetic groups. However, the non-inbred AquaAmérica variety showed lower values (P<0.05) for egg diameter (2.4mm) and egg weight (4.2mg) and higher values (P<0.05) for relative number of eggs (247.6 eggs/g of egg) than GIFT (egg diameter: 2.8mm; egg weight: 5.7mg; relative number of eggs: 175.4 eggs/g of egg) and AquaAmérica ×GIFT (egg diameter: 2.8mm; egg weight: 5.9mg; relative number of eggs: 168.8 eggs/g of egg). In conclusion, the non-inbred AquaAmérica variety produces smaller, lighter eggs but a higher relative number of eggs than the GIFT variety and the AquaAmérica ×GIFT cross; and inbreeding negatively affects spawning rate.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%