Vertically-Suspended Environmental Enrichment Improves Growth of Landlocked Fall Chinook Salmon during Initial Hatchery Rearing

Autor:	Nathan Huysman, Eric Krebs, Michael E. Barnes, Jill M. Voorhees
Rok vydání:	2020
Předmět:	Specific growth Chinook wind Environmental enrichment Animal science biology animal diseases Oncorhynchus Juvenile Landlocked country biology.organism_classification Feed conversion ratio Hatchery
Zdroj:	Open Journal of Applied Sciences. 10:725-731
ISSN:	2165-3925 2165-3917
DOI:	10.4236/ojapps.2020.1011051
Popis:	Environmental enrichment has been shown to improve juvenile salmonid growth during hatchery rearing. This study examined the effects of vertically-suspended environmental enrichment starting seven days after feed training and continuing for the next 32 days of landlocked fall Chinook salmon (Oncorhynchus tshawytscha) rearing. At the end of this experiment, final tank weights, gain, percent gain, and feed conversion ratio were all significantly improved in the tanks of salmon with environmental enrichment compared to barren tanks, with a nearly 25% improvement in feed conversion ratio. Individual salmon in tanks with environmental enrichment were significantly longer and weighed significantly more than salmon from tanks without enrichment. Specific growth rate was also significantly improved with the use of enrichment. The use of vertically-suspended environmental enrichment to improve growth and rearing efficiency is recommended during the initial rearing of landlocked fall Chinook salmon.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::307c9a6f53072d91c1fe0a5adc4c5116 https://doi.org/10.4236/ojapps.2020.1011051 Zobrazit plný text záznamu