ISSN:
1573-5117
Keywords:
Hexarthra bulgarica
;
high-elevation lake
;
copepod predation
;
Southern Andes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00005962
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