Selective feeding of Acartia clausi and Centropages typicus on microzooplankton
Selective feeding of Acartia clausi and Centropages typicus on microzooplankton
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DOI：
10.3354/meps053037
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发表时间：
1989
影响因子：
2.5
通讯作者：
N. Wiadnyana;F. Rassoulzadegan
中科院分区：
文献类型：
--
作者：
N. Wiadnyana;F. Rassoulzadegan
研究了两种常见的桡足类动物——克氏足跖虫（Acartia clausi）和典型足跖虫（Centropages typicus）对纤毛虫和浮游藻类混合物的选择性取食。结果表明，这些桡足类动物能够识别颗粒食物的质量。用等比例（按生物体积计算）的少毛草酸盐（Strombidium sulcatum）和双鞭毛藻（proocentrum micans）或硅藻（thalassisira weissflogii）的混合物喂给桡足类动物。桡足类动物以3.2 × 10′3桡足类和4 × 10′3桡足类的速率摄取纤毛虫。3 × 105 pm3（分别占总摄取量的67%和80%）的桡足-' h-'，当提供甲藻+鞭毛藻混合物时。克氏拟南蝽对沙蚤的偏好大于对沙蚤的偏好，对沙蚤纤毛虫的摄取量为3.7 × 10’pm3桡足-’h-’（占总摄取量的75 O/ O）。桡足类对两种猎物的选择差异表现为纤毛虫的Ivlev选择性指数为正（高达+ 0.73），甲藻和硅藻的Ivlev选择性指数均为负（低至1.00）。本文还讨论了这种中浮游动物选择性摄食行为的生态学意义。
Selective feed~ng of 2 common copepods, Acartia clausi and Centropages typicus, on mixtures of ciliates and planktonic algae was investigated. Results show the ability of these copepods to recognize the quality of their particulate foods. An equiproportional mixture (in terms of biovolume) of the oligotrichous cihate Strombidium sulcatum and either the dinoflagellate Prorocentrum micans or the diatom Thalassiosira weissflogii was offered to the copepods. The copepods ingested ciliates, at rates of 3.2 X 10' 3 copepod-' h-' for A. clausi and 4 .3 X 105 pm3 copepod-' h-' for C. typicus (67 and 80 % of the total ingested ration respectively), when chate + dinoflagellate mixtures were offered. A. clausi preferred S. sulcatum to T weissflogii, and ingested the ciliate at a rate of 3.7 X 10' pm3 copepod-' h-' (75 O/ O of total ingested ration). The differences observed in the selection of 2 types of prey by copepods were reflected in a positive Ivlev Electivity Index for the ciliates (as high as + 0.73) and in a negative Index for both dinoflagellates and diatoms (as low as 1.00). Ecological implications of this type of selective feeding behaviour in mesozooplankton are also discussed.