Relationship between functional response and gut transit time in the calanoid copepod Acartia clausi: role of food quantity and quality.
Relationship between functional response and gut transit time in the calanoid copepod Acartia clausi: role of food quantity and quality.
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桡足类 Acaria clausi 功能反应与肠道转运时间的关系：食物数量和质量的作用。
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
P. Mayzaud
中科院分区：
文献类型：
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作者：
V. Tirelli;P. Mayzaud
在实验室条件下，研究了克氏纺锤水蚤（Acartia clausi）摄食率与肠道通过时间的关系。实验中，克氏纺锤水蚤（Acartia clausi）分别摄食了威氏海链藻（Thalassiosira weissflopsis）的活细胞、威氏海链藻（Thalassiosira weissflopsis）的碎屑细胞、威氏海链藻（Thalassiosira weissflopsis）和威氏海链藻（Thalassiosira weissflopsis）两种饵料的蛋白质比例（50：50）、海洋原甲藻（Prorocentrum micans）的甲藻细胞和最小原甲藻（Prorocentrum minimum）。摄食遵循Holling 2型反应饮食1和4和线性的饮食2，3和5。肠道运输时间随食物丰富度变化，只有当桡足类喂养的活硅藻。肠排空率随T浓度的增加而增加。weissfloctane的值为0.010、0.020、0.032、0.042 min-1，对应于分别在50、110、130和275 mg蛋白L-1下测量的97、50、31和24 min的肠道通过时间。混合和纯碎屑饲料的肠道通过时间较长，但相似，范围为85 - 166分钟，取决于饮食。摄食率和肠道传输时间测量之间的耦合进行了讨论的背景下，桡足类的喂养策略。
The relationship between ingestion rate and gut transit time of the calanoid copepod Acartia clausi was examined in laboratory experiments with five different diets: (i) living cells of the diatom Thalassiosira weissflogii, (ii) detrital cells of the same diatom, (iii) 50:50 mix of the two previous diets on a protein basis, (iv) dinoflagellate cells of Prorocentrum micans and (v) Prorocentrum minimum. Ingestion followed a Holling type 2 response for diets 1 and 4 and a linear one for diets 2, 3 and 5. Gut transit time varied with food abundance only when the copepods were fed with the living diatom. The gut evacuation rate increased with the concentration of T. weissflogii with values of 0.010, 0.020, 0.032, 0.042 min ‐1 ,c orresponding to gut transit time of 97, 50, 31 and 24 min, measured at 50, 110, 130 and 275 mg protein L ‐1 , respectively.Copepodsfed with dinoflagellates, mixed and pure detrital dietsexhibited longer andsimilar gut transit times ranging from 85 to 166 min, depending on diet. The coupling between ingestion rate and gut transit time measurements is discussed in the context of copepod feeding strategies.