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Extra info for Aquaculture and Fisheries Biotechnology: Genetic Approaches Animals Pets

Sample text

1987). Female triploid tench had large visceral fat deposits and males had fat deposits along the connective-tissue capsule (Flajshans, 1997). -H. , 1989b). The neutral lipid triglyceride was higher in the triploids and in the diploids during the non-spawning season in the belly and dorsal muscles compared with the diploids during the spawning season, but the glycolipid and the phospholipid phosphatidylcholine were lower for triploids and diploids of the non-spawning season compared with diploids in the spawning season.

1980). Polyploidy is one mechanism of speciation. , 1980). Although diploid, salmonids have tetraploid ancestry and sometimes still show vestiges of tetrasomic inheritance. , 1984). , 1999a,b). , 1999a,b,c). Temperature and salinity can affect the rate of induction of polyploidy in shellfish and invertebrates, specifically the geoduck clam, Panope abrupta (Vadopalas and Davis, 1998). The timing of the meiotic divisions and extrusion of the first and second polar bodies are different for fish and shellfish.

1999) examined muscle growth and development in mixed-sex and all-female diploid and triploid Atlantic salmon. Rate of somite formation at 6°C was the same for diploids and triploids. The rostral-to-caudal development of myotubes and acetylcholinesterase staining at the myosepta were slightly more advanced in triploids than in diploids. However, family differences were larger than the differences between triploids and diploids. Satellite cells are used in postembryonic growth, and they were more abundant in diploid than in triploid smolts.

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