期刊
MARINE BIOLOGY
卷 157, 期 12, 页码 2581-2590出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00227-010-1520-7
关键词
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资金
- Department of Agriculture and Forestry of Mayotte (DAF)
- General Council of Mayotte (CDM)
- Jardin Maore Hotel
- Regional Council of Reunion Island
- European Social Fund (ESF)
- French National Agency of Research (ANR)
- Kelonia
- Department of Agriculture and Forestry of Mayotte (DAF)
- General Council of Mayotte (CDM)
- Jardin Maore Hotel
- Regional Council of Reunion Island
- European Social Fund (ESF)
- French National Agency of Research (ANR)
- Kelonia
We investigated the habitat use in green turtles exploiting a 13-ha multispecific seagrass meadow at Mayotte Island, south-western Indian Ocean. A phyto-ecological survey shows the occurrence of eight seagrass species, dominated by Halodule uninervis and Syringodium isoetifolium, distributed according to four distinct seagrass communities along the depth gradient. Direct underwater censuses show that green turtles occurred all over the meadow. Yet when community relative surface area was taken into account green turtles preferentially frequented the most seaward, biomass-richer S. isoetifolium-dominated community, suggesting that green turtles compensate for their intrinsically nutrient-poor herbivorous diet. Additionally, smaller (< 80 cm standard curved carapace length, SCCL) individuals also preferentially occurred in the most shoreward H. univervis-dominated community where no larger (> 80 cm SCCL) individuals were sighted, suggesting habitat use is indicative of diet selection and may reflect size-specific food requirements and physiology.
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