Title: The effects of menhaden oil, flaxseed oil and a dairy-yeast prebiotic on growth , health , feed conversion , survival , critical maximum temperature, and body composition of sunshine bass Authors
|Thompson, Michele -|
|Lochmann, Rebecca -|
Submitted to: Book of Abstracts Aquaculture America
Publication Type: Abstract Only
Publication Acceptance Date: January 9, 2013
Publication Date: February 21, 2013
Citation: Thompson, M., Rawles, S.D., Lochmann, R. 2013. The effects of menhaden oil, flaxseed oil and a dairy-yeast prebiotic on growth , health , feed conversion , survival , critical maximum temperature, and body composition of sunshine bass [abstract]. Book of Abstracts Aquaculture America 2013: Strike a Chord for Sustainable Aquaculture, February 21-25, 2013, Nashville, Tennessee. p.1089. Technical Abstract: A 12-week feeding trial was conducted with juvenile "sunshine bass" female Morone chrysops x male M. saxatilis using four diets containing two levels of a dairy-yeast prebiotic (0 or 2%) and either menhaden fish oil or flaxseed oil as a lipid source. The objective was to determine the main and interactive effects of the prebiotic and lipid sources on the growth performance, nonspecific immune responses and thermal tolerance of sunshine bass. Fish fed diets with fish oil gained more weight than those fed flaxseed oil (Table 1). Survival was not different among diets. A subset of fish from the feeding trial was used to determine critical maximum temperature. Two points were measured: the loss of equilibrium and a pre-death thermal point defined as non-reaction to stimuli. The temperature of loss of equilibrium was higher in fish fed diets with fish oil versus flaxseed oil. The pre-death thermal point was lower in fish fed the prebiotic diets. There was no difference in alternative complement activity in fish among diets. The mean corpuscular hemoglobin concentration (MCHC) was higher in fish fed the flaxseed oil diets than those fed fish oil. Proximate analysis and fatty acid data is pending.