Flesh qualities and muscle fiber characteristics in triploid and diploid rainbow trout

Autor:	G. Hörstgen-Schwark, M. Wicke, C. Werner, K. Poontawee, A. Müller-Belecke
Rok vydání:	2007
Předmět:	Dorsum endocrine system animal structures animal diseases Flesh fungi food and beverages Anatomy Aquatic Science Biology biology.organism_classification Intermediate muscle fiber Dorsal fin Trout Animal science Rainbow trout Ploidy Muscle fibre
Zdroj:	Journal of Applied Ichthyology. 23:273-275
ISSN:	1439-0426 0175-8659
DOI:	10.1111/j.1439-0426.2007.00843.x
Popis:	Summary Analyzed with regard to their slaughter weights and flesh quality 78-month-old diploid and triploid rainbow trout (full sibs) were reared together in a pond after tagging at an age of 12 months. Triploids had higher body weights and carcass percentages than diploids (6 kg vs 4 kg and 66% vs 52%). Triploid fish also displayed lower electrical conductivity values and darker (L* value) and redder (a* value) flesh color. The fillets of the triploid trout contained more crude fat and less moisture than the diploids (6% vs 3% and 68% vs 74%, respectively). No effect of ploidy was found with regard to the protein contents. Triploid rainbow trout had larger mean white and intermediate muscle fiber areas than diploid fish in the dorsal and pelvic fin regions. In the pelvic fin part, the white muscle fiber areas were larger than in the dorsal fin part. In conclusion, adult triploid rainbow trout grow faster especially by fiber hypertrophy and have better flesh quality parameters than diploid fish.
Databáze:	OpenAIRE
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