Effects of water temperature changes on the endogenous and exogenous rhythms of oxygen consumption in glass eels Anguilla japonica SCIE SCOPUS

Cited 11 time in WEB OF SCIENCE Cited 11 time in Scopus
Title
Effects of water temperature changes on the endogenous and exogenous rhythms of oxygen consumption in glass eels Anguilla japonica
Author(s)
Kim, WS; Yoon, SJ; Moon, HT; Lee, TW
Publication Year
2002
Abstract
The oxygen consumption rate (OCR) of glass eels Anguilla japonica was measured to determine the effects of water temperature changes on their endogenous and exogenous rhythms. Glass eels were exposed to different water-temperature patterns during simulated 12, 14 and 24 h cycles. The OCR of wild glass eels, freshly collected from estuaries, exhibited a clear endogenous circatidal rhythm while kept in constant darkness at 15 +/- 0.1degreesC. However, if the temperature was varied, the glass eels OCR coincided with the gradually increasing water temperature (Deltat = 1degreesC per 12 or 24 h) in the experimental chamber. This minor variation in water temperature (Deltat = 1degreesC per 12 or 24 h) was significant enough to affect the rhythmicity of the glass eels' OCR. When the glass eels were exposed to a cyclic increase or decrease in water temperature (1degreesC per 14 h), the OCR peaks displayed a clear rhythmicity at 14 h intervals. The results indicate that the glass eels' OCR is controlled not only by an endogenous circatidal rhythm, but also by exogenous rhythms related to small environmental changes, such as water temperature changes of as little as 1degreesC. The possible mechanisms underlying these temperature responses are discussed and the implications of the findings for the eco-physiology and metabolic activity rhythms of glass eels are highlighted.
ISSN
0171-8630
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5794
DOI
10.3354/meps243209
Bibliographic Citation
MARINE ECOLOGY PROGRESS SERIES, v.243, pp.209 - 216, 2002
Publisher
INTER-RESEARCH
Subject
RUDITAPES-PHILIPPINARUM BIVALVIA; DAILY GROWTH INCREMENTS; HYDROSTATIC-PRESSURE; JAPANESE EEL; MANILA CLAM; OTOLITH; LEPTOCEPHALI; FISH; VALIDATION; VENERIDAE
Keywords
glass eel; Anguilla japonica; oxygen consumption; temperature; rhythm; endogenous; exogenous
Type
Article
Language
English
Document Type
Article
Publisher
INTER-RESEARCH
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