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Variable versus constant temperature acclimation regimes: Effects on hemoglobin isomorph profile in goldfish,Carassius auratus.

Abstract：

:Goldfish,Carassius auratus, were acclimated for 2 to 3.5 weeks to three temperature regimes: [1] temporally-constant (10, 20 and 30°C), [2] diurnally-cycling (20 ± 10°C) and [3] randomly-fluctuating (± 2°C at approximately 2h intervals between extremes of 10 and 30°C). No significant differences in hematocrit were evident. Hemoglobin levels in fish at constant 30°C and under randomly fluctuating temperature were significantly elevated. Of the three hemoglobin isomorphs observed, the two minor components (G1, G3) tended to decrease in relative abundance with increase in constant temperature, but increased under varying temperature regimes. The converse was true of the principal hemoglobin, G2. Extent of isomorph variation was correlated with extent of temperature variability. These observations confirm that temperature variability significantly effects thermoacclimatory response. The functional significance of changes in isomorph abundances during the acclimatory process is considered.

journal_name

Fish Physiol Biochem

journal_title

Fish physiology and biochemistry

authors

Houston AH,Gingras-Bedard JH

doi

10.1007/BF00004327

subject

Has Abstract

pub_date

1994-12-01 00:00:00

pages

445-50

issue

6

eissn

0920-1742

issn

1573-5168

journal_volume

13

pub_type

杂志文章

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