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ZOOGEOGRAPHY OF PERCA FLUVIATILIS (LINNAEUS) AND PERCA FLAVESCENS (MITCHILL) WITH SPECIAL REFERENCE TO THE EFFECTS OF HIGH TEMPERATURE
Author(s) -
WEATHERLEY A. H.
Publication year - 1963
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1469-7998.1963.tb06100.x
Subject(s) - perch , zoogeography , fishery , notropis , zoology , biology , ecology , fish <actinopterygii> , biogeography
Perch, Perca fluviatilis and P. flavescens , are limited in their distribution by hills and mountains, being unable to persist in streams in which the rate of water flow is rapid. This fact largely determines the pattern of their world distribution. However, evidence is adduced to show that in North America and Australia high temperatures may be acting in determining the proximity of their approach to the equator. In contrast, perhaps, to some species it is believed that perch do not avoid death from high temperature by active avoidance of unfavourable thermal conditions, but that high temperature acts fairly directly in imposing limits. Because perch spawn in the spring, while conditions are still fairly cool, it is thought that high temperature is unlikely to affect reproduction adversely.