Genetic improvement of farmed tilapias: Composition and genetic parameters of a synthetic base population of Oreochromis niloticus for selective breeding

Ambekar, Jalindar D.; Bentsen, Hans B.; Ponzoni, R. W.; Rye, Morten; Nguyen, Nguyen Hong; Thodesen, Jørn; Gjerde, Bjarne

doi:10.1016/j.aquaculture.2007.09.015

Cited by 123 publications

(72 citation statements)

References 31 publications

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“…Partly due to the ease in which tilapia can be farmed and thrive when introduced into new areas and its market demand, the species has now been spread well beyond its native ranges via human-mediated translocations associated with aquaculture (George 1995;Vreven et al 1998;Eknath et al 2007). The species is also stocked in many natural environments but overfishing has decimated native populations.…”

Section: Introductionmentioning

confidence: 99%

“…The success of stocking Nile tilapia in nonnative environments is attributed to several factors including its opportunistic omnivore, growth rate, and prolific breeding in artificial and natural ecosystems, the species strategies of predator avoidance and diversified habitats (Ogutu-Ohwayo 1990;Balirwa 1992;Eknath et al 2007). The effectiveness of Nile tilapia to thrive in a broad range of habitats may also be reflected in the condition coefficient or factor of the species.…”

Section: Introductionmentioning

confidence: 99%

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Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

et al. 2018

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Nile tilapia occurs naturally in East Africa where it's an economically important species. Many of the natural populations of Nile tilapia have been affected by anthropogenic activities including translocations, associated with programmes aimed at enhancing capture fisheries and aquaculture productivity. Using geometric morphometric analyses, we tested the hypothesis that such anthropogenic activities have augmented admixture among natural populations of Nile tilapia and influenced the geographical distribution of morphological variation within the species. Our expectation was that Nile tilapia shape divergent might be consistent with reportedly anthropogenic activities in nonnative environments. To test this hypothesis, we analyzed the shapes of 490 individuals from thirteen populations; three farms, six natives and four nonnative natural populations. Our analysis revealed that the most pronounced shape diversification was observed in seven populations; three nonnatives (Victoria, Kyoga and Sindi farm) and four natives (Albert, River Nile, George and Turkana). The features responsible for the observed morphotypes were mainly related to the orientation of the anterior region of the fish and may be due to diversifying selection in response to new environmental pressures (for nonnative populations), admixture or drift. Shape change in the nonnative high-altitude populations was unexpectedly conserved, suggesting recent introductions which may have not resulted in admixture or there was strong selection against change in the traits measured. On the other hand, the recorded morphotypic clusters explained the possible genetic link to their putative ancestral home. Our results were partially consistent with our prediction that the nonnative populations exhibited divergent morphotypes. We recommend further investigations with molecular genetics for followup of these findings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

et al. 2018

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“…They are farmed in at least 85 countries, with most production coming from Asia and Latin America (Eknath et al, 2007). In 2007, tilapia production of China reached 1,210,000 tons, approximately up to 49% of the global yield (Li and Cai, 2008).…”

Section: Introductionmentioning

confidence: 99%

Quality evaluation of tray-packed tilapia fillets stored at 0C based on sensory, microbiological, biochemical and physical attributes

Liu¹,

Wen²,

Zhong³

et al. 2010

Afr. J. Biotechnol.

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The quality deterioration of tray-packed tilapia (genetically improved farmed tilapia strain of Oreochromis niloticus) fillets stored at 0°C were studied by integrated evaluations of sensory, microbiological, biochemical and physical analysis, in order to expound the mechanism of fish spoilage and develop the most reliable indicators for quality assessment. The results showed that four quality index as Pseudomonas counts, total volatile basic nitrogen (TVBN), cadaverine (CAD) and K value were highly correlated (r > 0.90) with storage time and sensory acceptability. Protein degradation was visible on SDS-PAGE when microbiological load exceeded 6 log cfu/g. Thiobarbituric acid reactive substances (TBARS) value remained at a very low level throughout the storage, suggesting low lipid oxidation in muscle. Hardness decrease tested by texture machine was consistent with texture softening of fillets in the sensory evaluation. Considering fish freshness and microbiological safety, the shelf life of tilapia fillets stored at 0°C was approximately 10 -12 days.

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“…Significant GxE interactions for growth in aquaculture have occurred due to differences in temperature, salinity, stocking density and between recirculation, pond and cage facilities (Sylven et al, 1991;Myers et al, 2001;Ponzoni et al, 2005;Saillant et al, 2006;Eknath 2007;Khaw et al, 2009;Mas-Muñoz et al, 2013) with estimates for body weight at harvest in different environments as low as 0.19+0.13 (Sae-Lim et al, 2013). There is also an emerging need for GxE assessment of growth rate in newly formulated diets with significant re-ranking of family performances between diets observed by Pierce et al (2008), Dupont-Nivet et al…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Rapid assessment of genotype-by-environment interactions and heritability for growth rate in aquaculture species using in vitro fertilisation and DNA tagging

Macbeth¹,

Wang

2014

Aquaculture

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Please cite this article as: Macbeth, Gilbert Michael, Wang, You-Gan, Rapid assessment of genotype-by-environment interactions and heritability for growth rate in aquaculture species using in vitro fertilisation and DNA tagging, Aquaculture (2014), doi: 10.1016/j.aquaculture.2014.08.026 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. The design is suitable for rapid assessment of GxE over one generation with a true 0.70 genetic correlation yielding standard errors as low as 0.07. Different design scenarios were tested for bias and accuracy with a range of heritability values, number of half-sib families created, number of progeny within each full-sib family, number of fish genotyped, number of fish stocked, differing family survival rates and at various simulated genetic correlation levels. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Genetic improvement of farmed tilapias: Composition and genetic parameters of a synthetic base population of Oreochromis niloticus for selective breeding

Cited by 123 publications

References 31 publications

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

Anthropogenic impacts on the contextual morphological diversification and adaptation of Nile tilapia (Oreochromis niloticus, L. 1758) in East Africa

Quality evaluation of tray-packed tilapia fillets stored at 0C based on sensory, microbiological, biochemical and physical attributes

Rapid assessment of genotype-by-environment interactions and heritability for growth rate in aquaculture species using in vitro fertilisation and DNA tagging

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