By Rex A. Dunham
The genetic development of fish for aquaculture and similar fisheries is a box of study that has noticeable significant advances in recent times. but there's no e-book which supplies an available assessment of the topic. This booklet goals to fill this hole and should be compatible for complex scholars and researchers in animal genetics, fish biology and aquaculture.
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Additional info for Aquaculture and Fisheries Biotechnology, CABI Publishing
1998), and European catﬁsh, Silurus glanis (Krasznai and Marian, 1986), grew faster than diploids during the ﬁrst year of growth. , 1986a). Upon reaching 2 years of age, the growth of diploid rainbow trout slows and triploid rainbow trout become larger than diploids (Bye and Lincoln, 1986). , 1982b), rainbow trout (Thorgaard and Gall, 1979) and plaice–ﬂounder hybrids (Pleuronectes platessa crossed with Platichthys ﬂesus) (Purdom, 1976) not only exhibit faster growth but also better feed conversion efﬁciency than diploids.
1985). Phenotypic Variation and Environmental Effects Restricted feeding could possibly result in additional problems, such as alterations in disease resistance. Lovell (1996) and Okwoche and Lovell (1997) reported that resistance to the bacterium Edwardsiella ictaluri was better in 1-year-old channel catﬁsh that were fed compared with unfed channel catﬁsh, but the opposite was true in 2-year-old ﬁsh. However, again, management of the environment is important in these evaluations because these results were possibly confounded by varying oxygen and ammonia levels in the experimental aquaria.
Morphology, meristics and identification Traits related to external appearance, including pigmentation, which is darker in triploid channel catﬁsh than in diploid channel catﬁsh, differ between diploids and triploids. Triploid grass carp ϫ bighead carp had fewer scales on the lateral line, a traverse series below the lateral line and a relatively longer gut compared with diploids. , 1988). Analysis of covariance and discriminant analysis indicated a classiﬁcation accuracy of 65–85%. Family differences may affect these differences in morphology and meristics in grass carp.
Aquaculture and Fisheries Biotechnology, CABI Publishing by Rex A. Dunham