Confirmation of cooperative polyandry in the Galapagos hawk (Buteo galapagoensis)

1995 ◽  
Vol 36 (2) ◽  
pp. 83-90 ◽  
Author(s):  
J. Faaborg ◽  
P. G. Parker ◽  
L. DeLay ◽  
Tj. de Vries ◽  
J. C. Bednarz ◽  
...  
Keyword(s):  
Cooperative Polyandry

scholarly journals Population Genetics of the Galápagos Hawk (Buteo Galapagoensis): Genetic Monomorphism Within Isolated Populations

The Auk ◽  
2005 ◽  
Vol 122 (4) ◽  
pp. 1210-1224 ◽  
Author(s):  
Jennifer L. Bollmer ◽  
Noah K. Whiteman ◽  
Michelle D. Cannon ◽  
James C. Bednarz ◽  
Tjitte de Vries ◽  
...  
Keyword(s):  
Genetic Drift ◽  
Dna Markers ◽  
Entire Range ◽  
Genetic Similarity ◽  
Isolated Populations ◽  
Island Size ◽  
Bird Population ◽  
Island Populations ◽  
Genetic Uniformity ◽  
Cooperative Polyandry

Abstract Because of their smaller size and isolation, island populations tend to be more divergent and less genetically variable than mainland populations. We collected DNA samples from nine Galápagos Hawk (Buteo galapagoensis) island populations, covering the species’ entire range. Neutral minisatellite DNA markers were used to calculate within-island genetic diversity and between-island genetic differentiation (FST). Typically, these markers mutate too quickly to be informative in such studies. However, in very small, isolated populations, concerns about high mutational rate are obviated by the relative force of genetic drift. Individuals within islands had the highest levels of reported genetic uniformity of any natural bird population, with mean within-population band-sharing similarity values ranging from 0.693 to 0.956, increasing with decreasing island size. Galápagos Hawks exhibit cooperative polyandry to varying degrees across islands; however, we did not find an association between degree of polyandry and genetic variability. Between-island FST values ranged from 0.017 to 0.896, with an overall archipelago value of 0.538; thus, most populations were genetically distinct. Also, we documented higher levels of genetic similarity between nearby populations. Our results indicated negligible gene flow among most Galápagos Hawk populations, and genetic drift has played a strong role in determining structure at these minisatellite loci. Genética de Poblaciones de Buteo galapagoensis: Monomorfismo Genético dentro de Poblaciones Aisladas

Limits to cooperative polyandry in birds

1994 ◽  
Vol 257 (1348) ◽  
pp. 67-73 ◽  
Keyword(s):  
Cooperative Polyandry

scholarly journals Variation in Morphology and Mating System Among Island Populations of GaláPagos Hawks

The Condor ◽  
2003 ◽  
Vol 105 (3) ◽  
pp. 428-438 ◽  
Author(s):  
Jennifer L. Bollmer ◽  
Tania Sanchez ◽  
Michelle Donaghy Cannon ◽  
Didier Sanchez ◽  
Brian Cannon ◽  
...  
Keyword(s):  
Body Size ◽  
Mating System ◽  
Sexual Size Dimorphism ◽  
Negative Relationship ◽  
Interspecific Variation ◽  
Size Dimorphism ◽  
Island Populations ◽  
Cooperative Polyandry ◽  
El Sistema ◽  
Los Grupos

Abstract Interspecific variation in sexual size dimorphism has commonly been attributed to variation in social mating system, with dimorphism increasing as intrasexual competition for mates increases. In birds, overall body size has also been found to correlate positively with size dimorphism. In this study, we describe variation in morphology and mating system across six populations of the endemic Galápagos Hawk (Buteo galapagoensis). Galápagos Hawks exhibit cooperative polyandry, a mating system in which long-term social groups contain a single female and multiple males. Comparisons among islands revealed significant differences in overall body size for both adults and immatures. Populations ranged from completely monogamous to completely polyandrous, with varying mean group sizes. Data did not support our prediction that sexual size dimorphism would increase with the degree of polyandry (number of males per group) or with body size; there was no correlation between mating system and sexual dimorphism. We did find a significant negative relationship between degree of polyandry and body size among islands, opposite of the pattern predicted. Variación en Morfología y Sistema de Apareamiento entre Poblaciones de Buteo galapagoensis Resumen. Variación interespecífica en dimorfismo sexual ha sido atribuída comúnmente a variaciones del sistema social de apareamiento, de tal manera que el dimorfismo aumenta conforme aumenta la competencia intrasexual por parejas reproductivas. También se ha encontrado que el tamaño corporal se correlaciona positivamente con el dimorfismo. En este estudio describimos la variación morfológica y el grado de poliandría de seis poblaciones de Buteo galapagoensis, una especie que exhibe un sistema de apareamiento denominado poliandría cooperativa. En este sistema los grupos de individuos reproductivos incluyen una sola hembra y múltiples machos. Se comprobó que existen diferencias significativas en el tamaño del cuerpo de adultos y juveniles entre islas. Las poblaciones muestreadas variaron entre monógamas y completamente poliándricas, y el tamaño promedio de los grupos fue variable. Los datos no apoyaron las predicciones establecidas inicialmente pues el grado de dimorfismo sexual no aumentó con el nivel de poliandría (número de machos por grupo) ni con el tamaño corporal, ni hubo una correlación entre el sistema de apareamiento y el dimorfismo sexual. La relación entre el tamaño corporal y el sistema de apareamiento fue contraria a la que se predijo: hubo una correlación negativa significativa entre el grado de poliandría y el tamaño corporal entre islas.

Genetic evidence for cooperative polyandry in reverse dichromatic Eclectus parrots

2007 ◽  
Vol 74 (4) ◽  
pp. 1047-1054 ◽  
Author(s):  
Robert Heinsohn ◽  
Daniel Ebert ◽  
Sarah Legge ◽  
Rod Peakall
Keyword(s):  
Genetic Evidence ◽  
Cooperative Polyandry

scholarly journals No sex-biased dispersal in a primate with an uncommon social system—cooperative polyandry

PeerJ ◽  
2014 ◽  
Vol 2 ◽  
pp. e640 ◽  
Author(s):  
Samuel L. Díaz-Muñoz ◽  
Ângela M. Ribeiro
Keyword(s):  
Social System ◽  
Cooperative Polyandry

THE CHARACTERISTICS AND OCCURRENCE OF COOPERATIVE POLYANDRY

Ibis ◽  
2008 ◽  
Vol 123 (4) ◽  
pp. 477-484 ◽  
Author(s):  
John Faaborg ◽  
Cindy B. Patterson
Keyword(s):  
Cooperative Polyandry

A Case of Cooperative Polyandry in the Common Tern

Waterbirds ◽  
2004 ◽  
Vol 27 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Jan-Dieter Ludwigs
Keyword(s):  
Common Tern ◽  
Cooperative Polyandry ◽  
The Common

The First Reported Case of Cooperative Polyandry in the Red-footed Booby: Trio Relationships and Benefits

2010 ◽  
Vol 122 (2) ◽  
pp. 361-365
Author(s):  
Lei Cao ◽  
Guixia Zhao ◽  
Shan Tang ◽  
Hanzhao Guo
Keyword(s):  
Cooperative Polyandry

Confirmation of cooperative polyandry in the Galapagos hawk ( Buteo galapagoensis )

1995 ◽  
Vol 36 (2) ◽  
pp. 83-90 ◽  
Author(s):  
J. Faaborg ◽  
P. G. Parker ◽  
L. DeLay ◽  
Tj. de Vries ◽  
J. C. Bednarz ◽  
...  
Keyword(s):  
Cooperative Polyandry
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