SUMMER POPULATION OF HEXARTHRA-BULGARICA IN A HIGH-ELEVATION LAKE OF SOUTH ANDES

被引：27
|
作者：
MODENUTTI, BE
机构：
[1] Centro Regional Universitario Bariloche, Bariloche, 8400
来源：
HYDROBIOLOGIA | 1993年 / 259卷 / 01期
关键词：
HEXARTHRA-BULGARICA; HIGH-ELEVATION LAKE; COPEPOD PREDATION; SOUTHERN ANDES;
D O I：
10.1007/BF00005962
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
A Hexarthra bulgarica population was studied over one summer in a high-elevation lake of the southern Andes. A brief description of specimens is included. The zooplankton is composed of this species and the calanoid copepod Pseudoboeckella gibbosa. The lake lacks vertebrate predators. Analysis of Pseudoboeckella guts showed that its omnivorous diet included Hexarthra. A biogeographical comparison is made between this and other American high-elevation lakes. It is concluded that the Hexarthra population is controlled by predation and by extreme abiotic conditions.
引用
收藏
页码：33 / 37
页数：5
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