Genetic variation for juvenile growth and survival in Atlantic cod (Gadus morhua)

Gjerde, Bjarne; Terjesen, Bendik Fyhn; Barr, Yoav; Lein, Ingrid; Thorland, Ingunn

doi:10.1016/j.aquaculture.2004.03.004

Cited by 83 publications

(59 citation statements)

References 20 publications

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“…Growth Growth can be affected by environmental factors like water temperature (Howell, 1984), light , fish size (Braaten, 1984;Jobling, 1992), sexual maturation (Braaten, 1984;Hansen et al, 2001;Hemre et al, 2002), health, nutrition (Morais et al, 2001;Rosenlund et al, 2004) and heritage (Gjerde et al, 2004). Specific growth rate (SGR) was higher in the first 7 weeks (1.00 ±0.09) than in the last 7 weeks (0.76 ±0.08), which was expected, since smaller cod have higher feed intake per weight unit than larger cod (Braaten, 1984).…”

Section: Growth and Feed Utilizationmentioning

confidence: 99%

Energy dilution with α-cellulose in diets for Atlantic cod (Gadus morhua L.) juveniles — Effects on growth, feed intake, liver size and digestibility of nutrients

Lekva¹,

Hansen²,

Rosenlund³

et al. 2010

Aquaculture

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Section: Growth and Feed Utilizationmentioning

confidence: 99%

Energy dilution with α-cellulose in diets for Atlantic cod (Gadus morhua L.) juveniles — Effects on growth, feed intake, liver size and digestibility of nutrients

Lekva¹,

Hansen²,

Rosenlund³

et al. 2010

Aquaculture

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“…The genotype dependent growth reported in the present study supports this view. For cod, initial trials (Gjerde et al 2004) indicate that the heritability for body weight is large, and that there is a substantial additive genetic variation of growth rate in cod. However, traditional methods of selective breeding for genetic improvement depend on estimation of heritability factors and breeding value based on parent/offspring or sib correlations (cf.…”

Section: Discussionmentioning

confidence: 99%

Variations in growth in haemoglobin genotypes of Atlantic cod

Imsland¹,

Foss

Nævdal

et al. 2004

Fish Physiol Biochem

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In the present paper are described the growth properties of three different haemoglobin genotypes of juvenile Atlantic cod (Gadus morhua) reared at 7, 10, 13 and 16°C. In addition one group was reared under ''temperature steps'' i.e. moved successively from 16 to 13 and 10°C. The genotype Hb-I(2/2) displayed the overall highest growth rate in the temperature range 13-16°C, whereas the Hb-I(1/1) genotype showed the highest overall growth at the lowest temperature (7°C). Accordingly, we found a significant interaction between genotype and temperature. The differences in growth were largest when cod were reared under the temperature step regime where the Hb-I(2/2) genotype displayed 17 and 24% higher growth than Hb

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“…For more recently domesticated species, where the environment is not yet standardized, the common environment effect can be rather large. In the Atlantic cod [7], the common environment effect on juvenile body weight was estimated to be 3-12% and in the rohu carp this effect (i.e. nursery pond effect) on harvest body weight was 32% [6].…”

Section: Introductionmentioning

confidence: 99%

A combination of walk-back and optimum contribution selection in fish: a simulation study

Sonesson

2005

Genet. Sel. Evol.

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-The aim of this paper was to study the performance of a novel fish breeding scheme, which is a combination of walk-back and optimum contribution selection using stochastic simulation. In this walk-back selection scheme, batches of different sizes (50, 100, 1000, 5000 and 10 000) with the phenotypically superior fish from one tank with mixed families were genotyped to set up the pedigree. BLUP estimated breeding values were calculated. The optimum contribution selection method was used with the rate of inbreeding (∆F) constrained to 0.005 or 0.01 per generation. If the constraint on ∆F could not be held, a second batch of fish was genotyped etc. Compared with the genotyping of all selection candidates (1000, 5000 or 10 000), the use of batches saves genotyping costs. The results show that two batches of 50 fish were often necessary. With a batch size of 100, genetic level was 76-92% of the genetic level achieved for schemes with all fish being genotyped and thus candidates for the optimum contribution selection step. More parents were selected for schemes with larger batches, resulting in a higher genetic gain, especially when all selection candidates were genotyped. There was little extra genetic gain in genotyping of 1000 fish instead of 100 for the larger schemes of 5000 and 10 000 candidates. The accuracy of breeding values was similar for all batch sizes (∼0.30), but higher (∼0.5) when all candidates were included. Since only the phenotypically most superior fish were genotyped, BLUP-EBV were biased. Compared with genotyping of all selection candidates, the use of batches saves genotyping costs, while simultaneously maintaining high genetic gains. fish breeding / selection / parentage testing / walk-back selection / genetic markers

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Genetic variation for juvenile growth and survival in Atlantic cod (Gadus morhua)

Cited by 83 publications

References 20 publications

Energy dilution with α-cellulose in diets for Atlantic cod (Gadus morhua L.) juveniles — Effects on growth, feed intake, liver size and digestibility of nutrients

Energy dilution with α-cellulose in diets for Atlantic cod (Gadus morhua L.) juveniles — Effects on growth, feed intake, liver size and digestibility of nutrients

Variations in growth in haemoglobin genotypes of Atlantic cod

A combination of walk-back and optimum contribution selection in fish: a simulation study

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