THE IMPORTANCE OF PREY SIZE AND DENSITY IN AN ENDEMIC PREDATOR PREY COUPLE (LEECH ERPOBDELLA-MONTEZUMA AMPHIPOD HYALELLA-MONTEZUMA)

被引：6

作者：

BLINN, DW ^{[1
]}

DEHDASHTI, B ^{[1
]}

RUNCK, C ^{[1
]}

DAVIES, RW ^{[1
]}

机构：

[1] UNIV CALGARY,DEPT BIOL SCI,DIV ECOL,AQUAT ECOL GRP,CALGARY T2N 1N4,ALBERTA,CANADA

来源：

JOURNAL OF ANIMAL ECOLOGY | 1990年 / 59卷 / 01期

关键词：

D O I：

10.2307/5167

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The rate with which E. montezuma captured H. montezuma was significantly influenced by both prey size and prey density with highest capture rates on juvenile H. montezuma at high prey densities. E. montezuma captured 30 times more energy at high prey densities (80 animals l-1) compared to low prey densities (10 animals l-1), and captured nearly 7 times more energy as juvenile prey compared to adult prey at high density regimes. E. montezuma showed a significantly higher capture rate for the pelagic H. montezuma than it did for the sedentary Hyalella azteca. The highly predictable nightly accumulations of H. montezuma in the surface 1.0 m of Montezuma Well, Arizona, may have provided the stimulus for the synchronized nightly migrations by E. montezuma and the development of its very specialized diet. -from Authors

引用

页码：187 / 192

页数：6

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