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 Marine Biology DOI 10.1007/s00227-014-2420-z http://link.springer.com/article/10.1007/s00227-014-2420-z Summary: 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@ucf.edu<mailto:Graham.Worthy@ucf.edu> http://worthy.cos.ucf.edu/PEBL/ 407-823-4701 office 407-823-5769 FAX skype: graham.worthy "Wise men talk because they have something to say; fools, because they have to say something" Plato ______________________________________________________