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TEMPERATURE, SALINITY, AND SOUTHERN LIMITS OF THREE SPECIES OF PACIFIC COTTID FISHES
Author(s) -
Morris Robert W.
Publication year - 1960
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1960.5.2.0175
Subject(s) - salinity , intraspecific competition , osmoregulation , biology , degree (music) , temperature salinity diagrams , seawater , ecology , oceanography , geology , physics , acoustics
Three species of cottid fishes, Oligocottus maculosus, Clinocottus globiceps, and Leptocottus armatus, were subjected to tests to determine their relative degree of tolerance of elevated temperature and salinity. They were found tolerant of approximately double strength sea water for up to 14 hours, at 12°C. Elevation of temperature resulted in partial failure of osmoregulation at about 16°C in the first two named species and at about 25°C in L. armatus. The temperature related reaction to osmotic stress can be related to maximum shore temperatures at the southern extremity of the ranges of O. maculosus and C. globiceps. In intraspecific comparison, tolerance of elevated salinity does not imply tolerance of high temperature and vice versa.