[MARMAM] Fine-Scale Population Structure of Estuarine Bottlenose Dolphins
Graham.Worthy at ucf.edu
Mon Mar 24 10:08:44 PDT 2014
We are pleased to announce the publication of the following article:
Nicole E. Browning, S.D. McCulloch, G.D. Bossart, and G.A.J. Worthy (2014)
Fine-Scale Population Structure of Estuarine Bottlenose Dolphins (Tursiops truncatus) Assessed Using Stable Isotope Ratios and Fatty Acid Signature Analyses
Stable isotope ratios and fatty acid signature analyses were employed to examine the fine-scale population structure of a year-round resident population of 600-800 bottlenose dolphins (Tursiops truncatus) in the Indian River Lagoon (IRL), Florida. The IRL, a 250 km long estuary running along the central-east coast of Florida (28.0° N, 80.6° W), is comprised of the Indian River Lagoon, Mosquito Lagoon, Banana River, and St. Lucie Estuary. Samples of skin and blubber were collected from dead stranded (n = 61, 1994-2004) and live dolphins (n = 153, 2002-2007, 2010, 2011) from throughout the IRL and surrounding environs. Using stable isotopes (SI), dolphins could be assigned to a Mosquito Lagoon subpopulation, a St Lucie Estuary subpopulation, and an Indian River Lagoon subpopulation. Fatty acid signature analysis (FASA) allowed for finer resolution, detecting Mosquito Lagoon and Banana River subpopulations, a separation of northern and southern IRL subpopulations, and a St Lucie Estuary subpopulation. Differences between sexes were detectable within subpopulations using FASA but not using SI. This may indicate that males and females are foraging in similar locations at a similar trophic level (detected using SI), but are varying in the types or proportions of specific prey (indicated by FASA). The combination of these complementary analyses results in a powerful tool for assessing fine-scale population substructure.
Graham A.J. Worthy, Ph.D.
Provost's Distinguished Research Professor of Biology,
Hubbs-Sea World Endowed Professor of Marine Mammalogy, and
Director, Physiological Ecology and Bioenergetics Lab
Department of Biology, University of Central Florida,
4110 Libra Dr, Room BIO402A
Orlando FL 32816-2368
Graham.Worthy at ucf.edu<mailto:Graham.Worthy at ucf.edu>
"Wise men talk because they have something to say; fools, because
they have to say something" Plato
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