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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Rolling stones and stable homes: Social structure, habitat diversity and population genetics of the Hawaiian spinner dolphin (Stenella longirostris)
Molecular Ecology, Volume 19, No. 4, Year 2010
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Description
Spinner dolphins (Stenella longirostris) exhibit different social behaviours at two regions in the Hawaiian Archipelago: off the high volcanic islands in the SE archipelago they form dynamic groups with ever-changing membership, but in the low carbonate atolls in the NW archipelago they form long-term stable groups. To determine whether these environmental and social differences influence population genetic structure, we surveyed spinner dolphins throughout the Hawaiian Archipelago with mtDNA control region sequences and 10 microsatellite loci (n = 505). F-statistics, Bayesian cluster analyses, and assignment tests revealed population genetic separations between most islands, with less genetic structuring among the NW atolls than among the SE high islands. The populations with the most stable social structure (Midway and Kure Atolls) have the highest gene flow between populations (mtDNA ST < 0.001, P = 0.357; microsatellite FST = -0.001; P = 0.597), and a population with dynamic groups and fluid social structure (the Kona Coast of the island of Hawai'i) has the lowest gene flow (mtDNA 0.042 < ST < 0.236, P < 0.05; microsatellite 0.016 < FST < 0.040, P < 0.001). We suggest that gene flow, dispersal, and social structure are influenced by the availability of habitat and resources at each island. Genetic comparisons to a South Pacific location (n = 16) indicate that Hawaiian populations are genetically depauperate and isolated from other Pacific locations (mtDNA 0.216 < FST < 0.643, P < 0.001; microsatellite 0.058 < FST < 0.090, P < 0.001); this isolation may also influence social and genetic structure within Hawai'i. Our results illustrate that genetic and social structure are flexible traits that can vary between even closely-related populations. © 2010 Blackwell Publishing Ltd.
Authors & Co-Authors
Andrews, Kimberly R.
United States, Kaneohe
Hawaiʻi Institute of Marine Biology
United States, Kailua
Marine Mammal Research Program
Karczmarski, Leszek
Hong Kong, Hong Kong
The University of Hong Kong, Swire Institute of Marine Science
South Africa, Pretoria
University of Pretoria
Au, Whitlow W.L.
United States, Kaneohe
Hawaiʻi Institute of Marine Biology
United States, Kailua
Marine Mammal Research Program
Rickards, Susan H.
United States, Kamuela
Hawai'i Marine Mammal Consortium
Vanderlip, Cynthia A.
United States, Honolulu
Division of Forestry and Wildlife
Bowen, Brian W.
United States, Kaneohe
Hawaiʻi Institute of Marine Biology
Grau, E. Gordon
United States, Kaneohe
Hawaiʻi Institute of Marine Biology
Toonen, Robert John
United States, Kaneohe
Hawaiʻi Institute of Marine Biology
Statistics
Citations: 125
Authors: 8
Affiliations: 6
Identifiers
Doi:
10.1111/j.1365-294X.2010.04521.x
ISSN:
09621083
e-ISSN:
1365294X
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study