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Survival of Brook Trout Embryos in Three Episodically Acidified Streams
Author(s) -
Fiss F. C.,
Carline R. F.
Publication year - 1993
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(1993)122<0268:sobtei>2.3.co;2
Subject(s) - fontinalis , streams , salvelinus , trout , biology , water quality , deposition (geology) , ecology , range (aeronautics) , environmental science , zoology , fishery , fish <actinopterygii> , computer network , paleontology , sediment , computer science , materials science , composite material
We evaluated, for brook trout Salvelinus fontinalis in three streams that undergo episodic acidification during critical periods of embryo development, survival of embryos from egg deposition to preemergence in natural redds and survival of sac fry in toxicity tests done in situ. Twenty‐five natural redds were used for comparisons among streams. Median survival to preemergence (range, 16–68%) was different ( P ≤ 0.05) among streams and was inversely related to stream concentration of inorganic monomeric Al. Survival to preemergence was not related to intragravel dissolved oxygen concentration, gravel quality, or depth or velocity of stream water at redd sites. Median survival of sac fry exposed to stream water for 39 d was different among streams (range, 51–95%) and was inversely related to stream concentration of inorganic monomeric Al. Episodic acidification could lead to declines in populations of brook trout by causing decreased survival of early life stages.