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Bioenergetics of marine teleosts during early life stage

Research Project

Project/Area Number 08660232
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

OIKAWA Shin  Kyushu University/Faculty of Agriculture/Assistant, 農学部, 助手 (10175234)

Co-Investigator(Kenkyū-buntansha) KANDA Takeshi  Miyazaki University/Faculty of Agriculture/Associate Professor, 農学部, 助教授 (80183292)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsAyu / Tiger puffer / Croaker / Oxygen consumption / Early life history / Ontogeny / Allometry / Metabolism / 呼吸量 / 仔魚 / 稚魚 / スケーリング / アンモニア / 呼吸 / 体サイズ / 体の大きさ
Research Abstract

The relationship between metabolism of an individual fish M and body mass W is expressed by an allometric equation M=aW^b. Mass-exponent b is smaller than unity, because mass-specific metabolic rate M/W usually decreases with increasing body mass. However, we have not enough information about this relationship during the early life stages of teleosts, In this study, we examined ontogenetic change in the metabolism-body mass relationship with three teleosts.
Oxygen consumption of intact fish M_< in vivo>, that of chopped fish M_< in vivo>, and ammonia excretion were determined with ayu Plecoglossus altivelis altivelis (0.00043-0.41 g in wet body mass), tiger puffer Takifugu rubripes (0.00068-2.7 g) and croaker Nibea japonica (0.00025-10 g) at 20゚C.M_< in vivo> was determined using one of closed, semi-closed or constant flow respirometry, M_< in vivo> a volumetric respirometry, and ammonia excretion rate an absorptimetry.
Mass-specific metabolic rate of intact fish M_< in vivo> /W of ayu was almost constant independent of body mass from just after hatch (0.00043 g) to 30 days old (0.04 g), then decreased. While, M_< in vivo>in /W of ayu decreased with growth immediately after hatch with a monophasic negative allometry. M/W both in vivo and in vitro of puffer and croaker increased with growth during a week after hatch with virtually unchanged body mass, then decreased with increasing body mass with several phases. In these phases, a-value in M=aW^bb increased with transfer of developmental stage. The difference of ontogenetic change of metabolism among three species can be attributed to the difference of extent of organogenesis just after hatch. The increase of a-value with growth in puffer and croaker is considered to reflect morphological and ecological changes with growth.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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