Antennule shape and body size of Bosmina: key factors determining its vulnerability to predacious Copepoda

Masaki Sakamoto; Takayuki Hanazato

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Antennule shape and body size of Bosmina: key factors determining its vulnerability to predacious Copepoda

机译：波斯尼亚虫的前庭形状和体型：决定其对早熟Co足类动物脆弱性的关键因素

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Cyclopoid copepods are common in lakes and ponds, and they have a significant predation impact on the communities of the small zooplankton species. To reduce the predation risk, some cladoceran zooplankters develop protuberant (defensive) morphologies in the presence of the copepods. In the case of the small cladoceran Bosmina, they elongate their appendages (antennule and mucrone) and change the antennule morphotype. However, information about the effectiveness of these defensive devices against copepod predation is still insufficient. In our study, to find the compositive effects of these appendages on the vulnerability of Bosmina, we exposed two bosminid species (B. longirostris and B. fatalis) of different body sizes and with appendages of different lengths and shapes to copepod (Mesocyclops) predation. The experiment revealed that the shape of the antennule is a main factor determining the bosminid’s vulnerability to copepod predation and indicated that the protection of the opened ventral carapace must be a key strategy by which Bosmina avoids copepod predation.

机译：环足类pe足类动物在湖泊和池塘中很常见，它们对小型浮游动物物种的群落具有重要的捕食影响。为了降低捕食的风险，一些cl形动物浮游动物在the足类动物的存在下发展出突起的（防御性）形态。在小锁骨的情况下，它们拉长了它们的附肢（前庭和粘液）并改变了前庭的形态。但是，有关这些防御装置对抗co足类动物捕食的有效性的信息仍然不足。在我们的研究中，为了发现这些附肢对波斯尼亚易受伤害性的综合影响，我们将两种不同体型和不同长度和形状的附肢的波斯菊（B. longirostris和B. fatalis）物种暴露于co足类（Mesocyclops）捕食中。实验表明，耳廓的形状是决定波斯尼亚人对co足动物捕食的脆弱性的主要因素，并指出，保护腹侧开腹甲壳动物必须成为避免Bo足动物捕食的关键策略。

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《Limnology》 |2008年第1期|27-34|共8页
作者
Masaki Sakamoto; Takayuki Hanazato;
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作者单位

Institute of Mountain Science Shinshu University 5-2-4 Kogandori Suwa 392-0027 Japan;

Institute of Mountain Science Shinshu University 5-2-4 Kogandori Suwa 392-0027 Japan;

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正文语种 eng
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关键词
Bosmina; Copepod predation; Vulnerability to predation; Morphological defense;

机译：波斯尼亚;Co足类捕食;对捕食的脆弱性;形态防御;

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1. Antennule shape and body size of Bosmina: key factors determining its vulnerability to predacious Copepoda [J] . Sakamoto M, Hanazato T Limnology . 2008,第1期

机译：波斯尼亚虫的前房形状和体型：决定其对早熟Co足类动物脆弱性的关键因素
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Antennule shape and body size of Bosmina: key factors determining its vulnerability to predacious Copepoda

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