期刊
AQUACULTURE RESEARCH
卷 41, 期 2, 页码 267-277出版社
WILEY
DOI: 10.1111/j.1365-2109.2009.02329.x
关键词
arachidonic acid; beta-carotene; guppy; microalgae; Parietochloris incisa; stress
类别
资金
- Regional Research and Development
- Israeli Ministry of Science and Technology
- Prof Dan Koshland Fund
Two trials were conducted to determine the effects of dietary enrichments with the microalga Parietochloris incisa, rich in arachidonic acid (ARA), on stress resistance in guppies Poecilia reticulata. The microalga was added to commercial diets as a neutral lipid (NL) extract and its fractions or as broken cells. Experimental diets were applied for a period of 14 days. In trial 1, commercial diets were supplemented with NL (containing 25 mg ARA and 0.11 mg beta-carotene g(-1) feed), its triacylglycerol (TAG) fraction (containing 25 mg ARAg(-1) feed and no beta-carotene) and the beta-carotene fraction (containing 0.11 mg carotenoid g(-1) feed and minute amounts of ARA). Neutral lipid-fed fish demonstrated the highest resistance (P < 0.05) to osmotic stress (32-ppt NaCl), followed by fish fed with diets supplemented with TAG and beta-carotene alone, which were more resistant than control (P < 0.05). In trial 2, fish fed diets supplemented with higher levels of broken alga (26.1 mg ARAg(-1) feed) were more resistant (P < 0.05) to stress as compared with fish fed lower ARA (16.3 g gg(-1)) or an unsupplemented control diet. We suggest a dietary supplementation with broken P. incisa cells to enhance stress resistance in guppies before a stressful event.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据