Farming evaluation of the brownbow triploid hybrid (<Emphasis Type="Italic">Oncorhynchus mykiss</Emphasis><Emphasis Type="Italic">Salmo trutta</Emphasis>) |
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| Authors: | Email author" target="_blank">JM?BlancEmail author P?Maunas |
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| Institution: | (1) I.N.R.A., Unité ECOBIOP, 64310 Saint-Pée-sur-Nivelle, France;(2) I.N.R.A., Unité NUAGE, 64490 Pisciculture Expérimentale, Lées-Athas, France |
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| Abstract: | Triploid hybrids between female rainbow trout (Oncorhynchus mykiss Walbaum) and male brown trout (Salmo trutta L.) were tested for farming performances, with reference to parental species. The main drawback of hybrids lay in embryonic
and larval mortalities, amounting to 60% on average, and displaying a large variability between spawns. Further survival was
inferior to that of diploid, but similar to that of triploid rainbow trout. Hybrid body weight was intermediate between weights
of rainbow and brown trout of the same age, mainly as a consequence of differences in precocious growth. Analysis of relative
growth rates from 6 to 18 months showed that hybrids were surpassed by rainbow controls in common rearing, but not in separate
rearing. Hybrid behaviour was similar to that of rainbow trout. These results are discussed in the scope of providing fisheries
managers with original and sterile game fishes.
An erratum to this article can be found at . |
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| Keywords: | Aquaculture Genetics Growth Hybridization Salmonidae Survival |
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