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Oxygen consumption by eggs and larvae of striped mullet, Mugil cephalus , in relation to development, salinity and temperature
Author(s) -
Walsh W. A.,
Swanson C.,
Lee C.S.,
Banno J. E.,
Eda H.
Publication year - 1989
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1989.tb02987.x
Subject(s) - biology , hatching , larva , zoology , mugil , salinity , oxygen , blastula , yolk sac , respirometry , respirometer , yolk , respiration , fishery , anatomy , embryogenesis , ecology , embryo , fish <actinopterygii> , biochemistry , chemistry , gastrulation , organic chemistry
Oxygen consumption rates during embryonic and the first 38 days of larval development of the striped mullet were measured at 24° C by differential respirometry. Measurements were obtained at the blastula, gastrula and four embryonic stages, and at the yolk‐sac, preflexion, flexion and post‐flexion larval stages. Oxygen uptake rates of eggs increased linearly from 0.024 μl O 2 per egg h ‐1 (0·323 μl O 2 mg ‐1 dry wt h ‐1 ) by blastulae to 0·177 μlO 2 per egg h ‐1 (2·516 μlO 2 mg 1 dry wth ‐1 ) by embryos prior to hatching. Respiration rates did not vary significantly among four salinities (20,25, 30, 35% 0 ). Larval oxygen consumption increased in a curvilinear manner from 0·243 μl O 2 per larva h ‐1 shortly after hatching to 18·880 μl O 2 per larva h ‐1 on day 38. Oxygen consumption varied in direct proportion to dry weight. Mass‐specific oxygen consumption rates of preflexion, flexion, and postflexion larvae did not change with age (10·838 μl O 2 mg 1 dry wt h ‐1 ). Larval oxygen consumption rates did not vary significantly among salinities 10–35%. Acute temperature increases elicited significant increases in oxygen consumption, these being relatively greater in yolk‐sac larvae ( Q 10 = 2·75) than in postflexion larvae ( Q 10 = 1·40).