Affiliation:
1. Department of Biology, University of North Carolina at Chapel Hill, CB#3280, Coker Hall, Chapel Hill, NC 27599, USA
Abstract
SUMMARY
During their long-distance migrations, sea turtles of several species feed on jellyfish and other invertebrates that are particularly abundant in ocean regions characterized by high productivity. An ability to distinguish productive oceanic regions from other areas, and to concentrate foraging activities in locations where prey density is highest, might therefore be adaptive. The volatile compound dimethyl sulfide (DMS) accumulates in the air above productive ocean areas such as upwelling and frontal zones. In principle, DMS might therefore serve as an indicator of high prey density for turtles. To determine whether turtles perceive DMS, juvenile loggerhead sea turtles (Caretta caretta) were placed into a water-filled arena in which DMS and other odorants could be introduced to the air above the water surface. Turtles exposed to air that had passed over a cup containing 10 nmol l−1 DMS spent more time at the surface with their noses out of the water than control turtles, which were exposed to air that had passed over a cup containing distilled water. Odors that do not occur in the sea (cinnamon, jasmine and lemon) did not elicit increased surface time, implying that the response to DMS is unlikely to reflect a generalized response to any novel odor. The results demonstrate for the first time that sea turtles can detect DMS, an ability that might enable the identification of favorable foraging areas.
Publisher
The Company of Biologists
Subject
Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics
Reference43 articles.
1. Ocean–atmosphere interactions in the global biogeochemical sulfur cycle;Andreae;Mar. Chem.,1990
2. Sensory biology of sea turtles;Bartol,2003
3. Fronts in large marine ecosystems;Belkin;Prog. Oceanogr.,2009
4. Abundance, distribution, and habitat of leatherback turtles (Dermochelys coriacea) off California, 1990-2003;Benson;Fish Bull.,2007
5. Transatlantic developmental migrations of loggerhead sea turtles demonstrated by mtDNA sequence analysis;Bolten;Ecol. Appl.,1998
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