首页> 外文期刊>The Biological Bulletin >Seawater Temperature Alters Feeding Discrimination by Cold-Temperate but not Subtropical Individuals of an Ectothermic Herbivore
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Seawater Temperature Alters Feeding Discrimination by Cold-Temperate but not Subtropical Individuals of an Ectothermic Herbivore

机译:海水温度改变了摄食性草食动物的冷温而非亚热带个体的摄食区分

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摘要

Seawater temperature varies across multiple spatial and temporal scales, yet the roles that such variation play in altering biotic interactions are poorly known. We assessed temperature-mediated feeding behavior exhibited by the herbivorous amphipod Ampithoe longimana collected from cold-temperate and subtropical estuaries (27° N and 41° N, respectively). Individuals were offered a pairwise feeding choice between lyophilized seaweeds that provide higher fitness (Ulva intestinalis) or lower fitness (Halimeda tuna, H. opuntia, Amphiroa spp., or Stypopodium zonale). Overall, herbivores preferentially consumed the higher quality U. intestinalis more than any lower quality food. However, the strength of this feeding choice was not consistent. Northern herbivores consumed proportionally more poorer quality tissue at 25 ° C than at 20 ° C in two assays (H. opuntia and Amphiroa sp.), consumed less poorer quality tissue at 25 ° C than at 20 ° C in one assay (S. zonale), and showed no difference in another assay (H. tuna). Moreover, when offered tissue coated with lipophilic extracts of H. opuntia, northern herbivores consumed more extract-coated tissue at 25 ° C than at 20 ° C. In contrast to northern herbivores, the southern herbivores did not alter their feeding choices with temperature. This study represents the first demonstration that short-term (i.e., days-long) variation in ambient temperature alters feeding choices in a marine herbivore. [PUBLICATION ABSTRACT]
机译:海水温度会在多个时空尺度上变化,但是这种变化在改变生物相互作用中所起的作用却鲜为人知。我们评估了从低温温带河口和亚热带河口(分别为27°N和41°N)收集的草食性两足动物Ampithoe longimana表现出的温度介导的摄食行为。在冻干的海藻中,成对选择提供个体,冻干的海藻可提供更高的适应性(小肠Ulva)或更低的适应性(Halimeda金枪鱼,H。opuntia,Amphiroa spp。或Sypopodium zonale)。总体而言,草食性动物比其他任何质量较低的食物优先食用质量较高的小肠。但是,这种喂食选择的强度并不一致。在两次测定中(H. opuntia和Amphiroa sp。),北部草食动物在25°C时消耗的劣质组织比在20°C时成比例地消耗更多,在一次测定中,在25°C时消耗的劣质组织比在20°C时消耗的劣质组织更少(S. zonale),并且在其他检测方法(H. tuna)中没有显示差异。此外,当提供的涂有仙人掌亲脂性提取物的薄纸时,北部草食动物在25°C时比在20°C时消耗的提取物涂覆的组织更多。与北部草食动物相比,南部草食动物不会随温度改变其觅食选择。这项研究首次证明了环境温度的短期(即几天)变化会改变海洋草食动物的觅食选择。 [出版物摘要]

著录项

  • 来源
    《The Biological Bulletin》 |2009年第1期|p.75-84|共10页
  • 作者

    Erik E Sotka Hannah Giddens;

  • 作者单位

    ERIK E. SOTKA* AND HANNAH GIDDENSGrice Marine Laboratory and Department of Biology, College of Charleston, 205 Fort Johnson Road, Charleston, South Carolina 29412Received 15 July 2008: accepted 3 October 2008.* To whom correspondence should be addressed. E-mail: SotkaE@cofc.edu;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 23:33:20

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