Differential responses of populations of the copepod Acartia hudsonica to toxic and nutritionally insufficient food algae

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	Differential responses of populations of the copepod Acartia hudsonica to toxic and nutritionally insufficient food algae
	Zheng, Ying ; Dam, Hans G. ; Avery, David E. ; Zheng Y(郑颖)
刊名	http://dx.doi.org/10.1016/j.hal.2011.06.003
	2011-09
关键词	RED-TIDE DINOFLAGELLATE FEEDING-BEHAVIOR EGG-PRODUCTION TEMORA-LONGICORNIS CALANUS-PACIFICUS BLOOM DYNAMICS DIATOMS TONSA DIETS PREY
英文摘要	China Scholarship Council; NOAA [NA06NOS4780249, S08-67963]; NSF [OCE-0648126]; Nutritional insufficiency and toxicity are deleterious effects of phytoplankton on grazers. We hypothesize that toxic food is likely to have stronger evolutionary selective effects on grazers than nutritionally insufficient food. We explore this hypothesis in comparative studies of egg production and egg hatching of the copepod Acartia hudsonica challenged with both a toxic and a nutritionally insufficient alga. Experiments lasting 6 days, in which mixtures of different proportions of the suspect and a control alga were offered as food to female copepods, showed that the dinoflagellate Alexandrium fundyense, which bears paralytic shellfish toxins, was toxic to A. hudsonica. In contrast, the diatom Phaeodactylum tricornutum was nutritionally insufficient to A. hudsonica. In another set of experiments, the effects of A. fundyense and P. tricornutum, respectively, as sole foods on egg production and egg hatching success of two geographically separated populations (Maine and Connecticut) of the copepod A. hudsonica were examined in common-environment experiments, after being raised under identical conditions for two generations. The location in Maine regularly experiences toxic blooms of Alexandrium sp. whereas the location in Connecticut does not. During a 6-day period, A. fundyense reduced the egg production rates of the Connecticut copepod population, but not of the Maine population. In contrast, the diatom P. tricornutum reduced the egg production of both populations. These results of this study are consistent with the hypothesis of local adaptation to toxic food, but not to nutritionally insufficient food. (C) 2011 Elsevier B.V. All rights reserved.
语种	英语
出版者	HARMFUL ALGAE
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87810]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Zheng, Ying,Dam, Hans G.,Avery, David E.,et al. Differential responses of populations of the copepod Acartia hudsonica to toxic and nutritionally insufficient food algae[J]. http://dx.doi.org/10.1016/j.hal.2011.06.003,2011.
APA	Zheng, Ying,Dam, Hans G.,Avery, David E.,&郑颖.(2011).Differential responses of populations of the copepod Acartia hudsonica to toxic and nutritionally insufficient food algae.http://dx.doi.org/10.1016/j.hal.2011.06.003.
MLA	Zheng, Ying,et al."Differential responses of populations of the copepod Acartia hudsonica to toxic and nutritionally insufficient food algae".http://dx.doi.org/10.1016/j.hal.2011.06.003 (2011).