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The ability to feed in hypoxia follows a seasonally dependent pattern in shore crab Carcinus maenas.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Legeay Massabuau |
| Copyright Year | 2000 |
| Abstract | The ability of the adult shore crab Carcinus maenas, native to the Bay of Arcachon (SW France), to feed in hypoxia was determined at various seasons. Crabs previously kept at field temperature were fed after a 5-day fasting period at 15 degrees C. Their blood oxygenation and pH regulation strategy and also their gill anatomy were analysed. From May to October, C. maenas feed at levels of O(2) partial pressure (p(O(2))) in the water, pwO(2)=2 kPa (1 mg l(-1)), without switching to their anaerobic metabolism. In March-April, before the main moulting period, the same food intake at pwO(2)=4 kPa induced a systematic blood lactate increase associated with some mortality. An analysis performed at pwO(2)=4 kPa at that time showed that in intermoult crabs the development of a coating of foreign material over the gill cuticle interfered with O(2)-supply, preventing the small arterial p(O(2)) increases (from 0.7 to 1 kPa) which occurred at other seasons. This led to a cellular hypoxia despite a systematic postprandial blood-pH alkalinisation which favoured O(2)-loading at gill level and increased arterial O(2) concentration. In March-April, alkalinisation appeared at pwO(2) values >/=6 kPa and from May to at least July at pwO(2)>/=2 kPa. Results are discussed in terms of season-related physiological performance, as hypoxic events mainly occur during the hot season. |
| Starting Page | 113 |
| Ending Page | 129 |
| Page Count | 17 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://directory.umm.ac.id/Data%20Elmu/jurnal/J-a/Journal%20of%20Experimental%20Marine%20Biology%20and%20Ecology/Vol247.Issue1.Apr2000/3442.pdf |
| PubMed reference number | 10727691v1 |
| Volume Number | 247 |
| Issue Number | 1 |
| Journal | Journal of experimental marine biology and ecology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Anatomic structures Burnett Schwartz Berberian syndrome Carcinus maenas Cell Hypoxia Cell Respiration Crabs Foreign Bodies Kilopascal Lactic acid Molting Partial Pressure |
| Content Type | Text |
| Resource Type | Article |
