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Chronic Effects of Constant Elevated Temperature on the Fathead Minnow (Pimephales promelas Rafinesque)
Author(s) -
Brungs William A.
Publication year - 1971
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1971)100<659:ceocet>2.0.co;2
Subject(s) - pimephales promelas , minnow , reproduction , biology , zoology , sexually active , fishery , fish <actinopterygii> , ecology , immunology , human immunodeficiency virus (hiv)
A continuous, 12‐month exposure of fathead minnows to elevated water temperature (26–34 C) showed that reproduction was more sensitive than survival, growth, or egg hatchability in assessing the effect of temperature. The number of eggs produced/female, the number of eggs/spawning, and the number of spawnings/female were each gradually reduced at successive temperatures above the control (23.5 C). No spawning or mortality occurred at 32 C which was the lowest temperature where growth was apparently reduced. Male secondary sexual characteristics were less developed at 30 C than at lower temperatures.