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Titolo:
Acidification severely suppresses spawning of hime salmon (land-locked sockeye salmon, Oncorhynchus nerka)
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:
AQUATIC TOXICOLOGY
fascicolo: 1, volume: 51, anno: 2000,
pagine: 107 - 113
SICI:
0166-445X(200011)51:1<107:ASSSOH>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT SALVELINUS-FONTINALIS; BROOK TROUT; LOW PH; RAINBOW-TROUT; DEPRESSED PH; AVOIDANCE; ACID; PRECIPITATION; REPRODUCTION; GRADIENTS;
Keywords:
acidification; avoidance; pH; salmon; sexual behavior;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
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, "Acidification severely suppresses spawning of hime salmon (land-locked sockeye salmon, Oncorhynchus nerka)", AQUAT TOX, 51(1), 2000, pp. 107-113

Abstract

A laboratory study was conducted to investigate the effects of an acidic environment on the female sexual behavior of hime salmon (land-locked sockeye salmon, Oncorhynchus nerka). Spawning hime salmon were extremely sensitive to the acidity of ambient water. Nest-digging behavior was severely inhibited (P < 0.05) by very slight acidification (pH below 6.4) of the water. Below pH 6.0, females showed almost no diggings. When the ambient water was returned to nearly neutral (pH 6.6), diggings reappeared in four of the sixfish tested, whereas in two individuals, none was observed. Avoidance of slightly acidic water in selection of spawning site or cessation of spawningbehavior in weakly acidic environments maybe the most potent cause Bf the reduction of salmonid populations in the early stages of acidification. (C)2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 06:45:57