New Zealand Journal of Marine and Freshwater Research abstracts
Thermal tolerance and preference of some native New Zealand freshwater fish
JODY RICHARDSON
JACQUES A. T. BOUBÉE
DAVID W. WEST
NIWA
National Institute of Water and Atmospheric
Research Ltd.
P.O. Box 11-115
Hamilton, New Zealand
Abstract Upper lethal and preferred temperatures were
determined experimentally for eight common species of New Zealand freshwater
fish. Upper lethal temperatures ranged between 28.3 and 39.7deg.C and preferred
temperatures between 16.1 and 26.9deg.C.
Anguilla australis was the most
tolerant of high temperatures, whereas
Retropinna retropinna and two
species of
Galaxias preferred cooler water. The relationship between
lethal and preferred temperatures for New Zealand species was similar to that
calculated from data for 38 other species of freshwater fish, meaning that
either lethal or preferred temperatures could be used accurately to predict
lethal, preferred, and growth optima, and to recommend temperature regimes for
waterways. However, New Zealand field records show that significant
relationships between fish density and water temperature exist for only two
species,
A. dieffenbachii and
Cheimarrichthys fosteri. This
suggests New Zealand species are able to thrive within a wide temperature
range.
Keywords preferred temperature; freshwater fish; lethal
temperature; New Zealand
New Zealand Journal of Marine and Freshwater Research, 1994: Vol. 28:
399-407
0028-8330/94/2804-0399 $2.50/0 (c) The Royal Society of New Zealand
1994
PDF file of entire paper: medium quality (618K); (scanned from paper original: notes about this process)
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