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Genetic variation among subspecies of Least Tern (Sterna antillarum): Implications for conservation

Waterbirds

By:
, , and
DOI: 10.1675/1524-4695(2006)29[176:GVASOL]2.0.CO;2

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Abstract

DNA sequence variation from two nuclear introns and part of the mitochondrial cytochrome-b gene were used to Evaluate population structure among three subspecies of Least Term that nest in the United States (California [Sterna antillarum browni], Interior [S. a. athalassos], Eastern [S. a. antillarum]). Sequence variation was highest for nuclear intron XI (Gadp) within the glyceraldehyde-3-phosphate dehydrogenase gene. The second nuclear intron was fixed for the same allele in all subspecies. Fixation indices, FST and MST, for Gadp indicated genetic divergence between California and Interior subspecies. Estimates of nuclear gene flow were <4 individuals/generation, except between the Interior and Eastern subspecies (4 individuals/generation). Genetic indices for mitochondrial DNA did not differ among subspecies, and gene flows (reflecting female dispersal) ranged from 10 to 83 individuals/generation. Reservations are expressed about the validity of the current subspecific divisions and further research is required, including their taxonomic relationship to the Little Tern (Sterna albifrons).

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Genetic variation among subspecies of Least Tern (Sterna antillarum): Implications for conservation
Series title:
Waterbirds
DOI:
10.1675/1524-4695(2006)29[176:GVASOL]2.0.CO;2
Volume
29
Issue:
2
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Waterbirds
First page:
176
Last page:
184