Download PDF by Rex A. Dunham: Aquaculture and Fisheries Biotechnology, CABI Publishing
By Rex A. Dunham
The genetic development of fish for aquaculture and similar fisheries is a box of analysis that has visible huge advances lately. but there's no ebook which gives an available evaluate of the topic. This publication goals to fill this hole and may be appropriate for complicated scholars and researchers in animal genetics, fish biology and aquaculture.
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Additional resources for Aquaculture and Fisheries Biotechnology, CABI Publishing
However, by standardizing for temperature shifts, consistent results can be obtained. , 1997). Cherfas et al. (1990) apply the shocks based on τ0, the percentage of time until a division event occurs, which is, of course, temperature dependent. Often the hatch of embryos that have been induced for triploidy is lower than that for controls. , 2000), and sea bass, Dicentrarchus labrax, the lower hatch is due to handling and treatment of the eggs and not due to the state of triploidy. , 1997). , 1990).
1989) Yamamoto and Sugawara (1988) Chen et al. (1997a,b,c) Chourrout (1984) Palti et al. (1997) Palti et al. (1997) Aldridge et al. (1990) Reddy et al. (1990) Reddy et al. (1990) Polyploidy 25 26 Chapter 3 Fig. 1. Hydrostatic pressure chamber for inducing polyploidy. It is important to utilize a design that allows the bleeding off of all air to prevent the chamber from exploding and becoming a projectile. , 1983). , 1980). Polyploidy is one mechanism of speciation. , 1980). Although diploid, salmonids have tetraploid ancestry and sometimes still show vestiges of tetrasomic inheritance.
CB was also more effective in producing triploidy than hydrostatic pressure in scallops, Chlamys nobilis (Komaru and Wada, 1989). Pressure shocks, thermal shocks, CB and 6-dimethylaminopurine (6-DMAP) have been used to induce triploidy in gastropods (Zhang, G. , 1998). Treatments of 300 µM of 6-DMAP for 15 min for blocking polar body II yielded the highest percentage of triploids, but none of the veligers survived. Treatments of 100–150 µM for 15 min to block polar body II gave 46–54% triploids and allowed 90–95% survival of the trocophores.
Aquaculture and Fisheries Biotechnology, CABI Publishing by Rex A. Dunham