Muscle growth in Polar fish: a study of <i>Harpagifer</i> species with sub-Antarctic and Antarctic distributions
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- JOHNSTON IAN A
- Gatty Marine Laboratory, School of Biology, University of St Andrews
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- VIEIRA VERA L A
- Gatty Marine Laboratory, School of Biology, University of St Andrews
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- FERNANDEZ DANIEL A
- Gatty Marine Laboratory, School of Biology, University of St Andrews
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- ABERCROMBY MARGUERITE
- Gatty Marine Laboratory, School of Biology, University of St Andrews
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- BRODEUR JULIE C
- Gatty Marine Laboratory, School of Biology, University of St Andrews
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- PECK LLOYD
- British Antarctic Survey
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- CALVO JORGE
- CADIC-CONICET
Bibliographic Information
- Other Title
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- Muscle growth in Polar fish: a study of Harpagifer species with sub-Antarctic and Antarctic distributions
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Abstract
Muscle growth was investigated in Harpagifer species with sub-Antarctic (Harpagifer bispinis, environmental temperature (ET) 4-11°C) and Antarctic (Harpagifer antarcticus, ET -1.5 to +1°C) distributions. The trunk musculature of 1 d-old larval H. antarcticus, 0.84-0.93cm standard length (SL), contained 1025±76 fast muscle fibres per cross-section (Mean±SE, n=6). Zones of muscle fibre formation were restricted to the dorsal and ventral cones of the myotomes. The maximum diameter of fast muscle fibres increased linearly with standard length and was 270 μm at 10.1cm SL. The density of myogenic progenitor cells, determined by staining sections for c-met and myogenic regulatory factors (MyoD, myf-5, myf-6, myogenin), decreased with increasing body length. The number and size distribution of fast muscle fibres with respect to standard length was indistinguishable in H. bispinis and H. antarcticus, although the number of c-met+ve cells and the maximum body size was higher in the Antarctic species. Comparative studies indicate that a large maximum fibre diameter is a general characteristic of the Notothenioideii. This may reflect the radiation from a small bodied ancestor with a relatively low fibre number, although adaptive explanations related to metabolic rate reduction cannot be excluded.
Journal
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- Fisheries science
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Fisheries science 68 (sup2), 1023-1028, 2002
The Japanese Society of Fisheries Science
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Details 詳細情報について
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- CRID
- 1390282679404937088
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- NII Article ID
- 130003903724
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- NII Book ID
- AA10993718
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- NDL BIB ID
- 6422603
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- ISSN
- 09199268
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed