Genetic variability in the endemic vireos of Puerto Rico and Jamaica contrasted with the continental White-eyed Vireo

Authors
Citation
Pw. Zwartjes, Genetic variability in the endemic vireos of Puerto Rico and Jamaica contrasted with the continental White-eyed Vireo, AUK, 116(4), 1999, pp. 964-975
Citations number
62
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
AUK
ISSN journal
0004-8038 → ACNP
Volume
116
Issue
4
Year of publication
1999
Pages
964 - 975
Database
ISI
SICI code
0004-8038(199910)116:4<964:GVITEV>2.0.ZU;2-I
Abstract
To test the hypothesis that island species exhibit lower genetic variabilit y than mainland relatives, genetic data from three species of vireos endemi c to Puerto Rico and Jamaica were compared with the White-eyed Vireo (Vireo griseus), a closely related species that breeds in North America. Variabil ity was examined using random amplified polymorphic DNA (RAPD) markers. The White-eyed Vireo had a significantly higher proportion of polymorphic band s (67% of 115 total bands) than the Puerto Rican Vireo (V. latimeri; 38% of 95 bands), Jamaican Vireo (V. monestus; 34% of 107 bands), or Blue Mountai n Vireo of Jamaica (V. osburni; 32% of 111 bands). The mean genetic distanc e among conspecific individuals (Jaccard's index) was significantly higher in the White-eyed Vireo (0.293) than in any of the three endemic species (P uerto Rican Vireo, 0.115; Jamaican Vireo 0.115; Blue Mountain Vireo, 0.106) ; mean genetic distance Values did not differ among the three endemic speci es. Population substructuring assessed by analysis of molecular valiance (P hi(ST)) and Wright's F-ST values revealed that the two common endemic speci es (Puerto Rican and Jamaican vireos) had greater among-population genetic variation than did three populations of the White-eyed Vireo. Genetic subst ructuring was moderate to substantial among two Puerto Rican Vireo populati ons (Phi(ST) = 0.103, F-ST = 0.141) and weak to moderate among two Jamaican Vireo populations (Phi(ST) = 0.048, F-ST = 0.117). The migratory White-eye d Vireo had the lowest values for both statistics (Phi(ST) = 0.015, F-ST = 0.109). Low among-individual, within-species genetic variation was related to island endemism but was not influenced by differences among endemics in habitat specificity or local abundance.