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| Titel: |
The oxygen uptake of ovigerous edible crabs (Cancer pagurus)(L.) and their eggs |
| Auteur: |
Naylor, J. K. Taylor, E. W. Bennett, D. B. |
| Verschenen in: |
Marine & freshwater behaviour & physiology |
| Paginering: | Jaargang 30 (1997) nr. 1 pagina's 29-44 |
| Jaar: |
1997 |
| Inhoud: |
Oxygen uptake rates (MO2) in settled Cancer pagurus ranged from 7.5±1.3 to 13.2+1.4 μmol O2 kg-1 min-1 in non-ovigerous females and from 9.4+1.7 to 18.5±4.6 μmol O2 kg-1 min-1 in ovigerous females. The higher rates of uptake in ovigerous females were attributed to MO2 of the egg mass, which contained eggs at stage 3-4 of development and was dependent on degree of agitation, with MO2 for unstirred eggs at 62.9±10.9 μmol O2 kg-1 min-1 and stirred eggs at 261.4±72 μmol O2 kg-1 min-1. Estimates of the MO2 of ovigerous females minus their eggs indicated a decrease in oxygen uptake of adult crabs during brooding. Ovigerous female crabs show a bimodal, crepuscular rhythm of diurnal variation in MO2 while non-ovigerous females show a unimodal rhythm. These data support the observation that ovigerous females in the wild are generally less active, may not feed and are not often captured in baited traps. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 6 gevonden artikelen
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