Gammarus pulex (L.) feeding bioassay—Effects of parasitism
Gammarus pulex (L.) feeding bioassay—Effects of parasitism
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Gammarus pulex (L.) 摄食生物测定——寄生的影响
DOI：
10.1007/bf00196046
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发表时间：
1995
影响因子：
2.7
通讯作者：
E. Taylor
中科院分区：
文献类型：
--
作者：
D. Pascoe;T. Kedwards;S. Blockwell;E. Taylor
为了确定灰头鱼对卤虫卵的摄食活性是否会受到影响，以及对利用摄食生物测定法进行污染评价的可能后果，从英国赫里福德郡的Teme河采集了Gammarus pulex和10枚无壳的A.通过以规律的时间间隔记录每只动物消耗的卵的数量，立即进行摄食测定。测量每只革兰氏阴性杆菌的重量和长度，解剖动物以观察是否有P. laevis，允许分类的大型和小型gammarids到寄生和非寄生组。计算并比较4组动物的中位进食时间。结果表明，被寄生的动物比未被寄生的动物花费更长的时间来消耗卵，而各组的摄食率变化相似。相应的大型和小型动物之间也没有显著差异。得出的结论是，应评估采集或培养用于毒性试验的革蜱虫的寄生虫状态，以避免使用寄生动物产生错误结果的可能性。00187035。
A study was performed in order to determine whether the feeding activity ofGammarus pulexonArtemia salinaeggs is modified by the presence ofPomphorhynchus laevisand if so, the possible consequences for pollution evaluation using the feeding bioassay.Gammaruswere collected from the River Teme, Herefordshire, England together with 10 shell-less eggs ofA. salina.The feeding assay was carried out immediately, by recording at regular time intervals, the number of eggs consumed by each animal. The weight and length of eachGammaruswere measured and the animals dissected to reveal any infections withP. laevis, allowing classification of both large and small gammarids into parasitized and non-parasitized groups. Median feeding times were calculated and compared for the 4 groups of animals. Results indicated that parasitized animals took longer to consume the eggs than non-parasitized ones, while the variation in feeding rate was similar for each group. There were also no significant differences between the corresponding large and small animals. It was concluded that gammarids which are collected or cultured for use in toxicity tests should be assessed for parasite status in order to avoid the possibility of erroneous results arising from the use of parasitized animals.00187035.