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Titolo:
Effects of acidification on salmonid spawning behavior
Autore:
Kitamura, S; Ikuta, K;
Indirizzi:
Natl Res Inst Aquaculture, Nikko Branch, Nikko, Tochigi 3211661, Japan Natl Res Inst Aquaculture Nikko Tochigi Japan 3211661 higi 3211661, Japan
Titolo Testata:
WATER AIR AND SOIL POLLUTION
fascicolo: 1-4, volume: 130, anno: 2001,
parte:, 2
pagine: 875 - 880
SICI:
0049-6979(200108/09)130:1-4<875:EOAOSS>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW PH; PRECIPITATION; LAKES;
Keywords:
acidification; avoidance; pH; salmonid; sexual behavior;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Kitamura, S Natl Res Inst Aquaculture, Nikko Branch, Nikko, Tochigi 3211661, Japan Natl Res Inst Aquaculture Nikko Tochigi Japan 3211661 , Japan
Citazione:
S. Kitamura e K. Ikuta, "Effects of acidification on salmonid spawning behavior", WATER A S P, 130(1-4), 2001, pp. 875-880

Abstract

We studied the effects of acidification on female sexual behavior in browntrout (Salmo trutta) and compared the results with those in hime (land-locked sockeye) salmon (Oncorhynchus nerka) (Kitamura and Ikuta, 2000). The results were similar to those of sockeye salmon. Spawning brown trout were extremely sensitive to the acidity of ambient water, and nest-digging behavior was severely inhibited (p<0.05) by very slight acidification (pH below 6.4). However, there were some differences between the two species. Female trout and salmon showed almost no digging below pH 5.0 and 6.0 (Kitamura and Ikuta, 2000), respectively. When the ambient water was returned to nearly neutral (pH6.6) conditions, digging in hime salmon reappeared in 4 of the 6 fish tested (Kitamura and Ikuta, 2000), whereas digging in brown trout reappeared in all 6 fish tested. The above-mentioned differences in behavioral response between the two species appear to reflect the species difference in terms of vulnerability to acidification (Ikuta et al., 1992). Avoidance of slightly acidic water in selection of spawning site or cessation of spawning behavior in weakly acidic environments may be the most potent cause of the reduction of salmonid populations in the early stages of acidification.

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Documento generato il 20/01/20 alle ore 04:42:42