A new interpretation of the social organization and mating system of the Callitrichidae

1987 ◽  
Vol 8 (1) ◽  
pp. 73-92 ◽  
Author(s):  
R. W. Sussman ◽  
P. A. Garber
Keyword(s):  
Mating System ◽  
Social Organization ◽  
The Social ◽  
New Interpretation

scholarly journals The Social Organization and Mating System of the Striated Grasswren

The Condor ◽  
2001 ◽  
Vol 103 (2) ◽  
pp. 412-417 ◽  
Author(s):  
Jordan Karubian
Keyword(s):  
Mating System ◽  
Social Organization ◽  
South Australia ◽  
Habitat Destruction ◽  
Territory Size ◽  
Dispersal Ability ◽  
The Social ◽  
Adult Sex Ratio ◽  
Socially Monogamous ◽  
Single Nest

Abstract This paper summarizes the breeding biology, social organization, and mating system of the Striated Grasswren (Amytornis striatus), a member of one of the least-known genera of Australian passerines, the grasswrens. I studied 18 color-banded groups and 14 nests in South Australia for one breeding season in 1996. Mean territory size was 3.0 ha, and territories consisted of sandy dunes dominated by spinifex (Triodea irritans). This apparent dependency on mature spinifex, coupled with poor dispersal ability, suggests that the Striated Grasswren is particularly susceptible to habitat destruction. Most groups consisted of socially monogamous pairs, mean group size was 2.1 adults, and the adult sex ratio was 0.95 (males:females). The average clutch size was 2.2 ± 0.4 eggs and an average of 1.1 ± 1.1 young fledged per nesting effort. A male and a female provided similar amounts of parental care at a single nest. Cloacal protuberance size and amount of sperm collected did not suggest intense sperm competition among males.

Social and genetic mating system of Ridgway's hawk (Buteo ridgwayi), an endemic raptor on Hispaniola

2013 ◽  
Vol 29 (6) ◽  
pp. 531-540 ◽  
Author(s):  
Lance G. Woolaver ◽  
Rina K. Nichols ◽  
Eugene S. Morton ◽  
Bridget J. M. Stutchbury
Keyword(s):  
Mating System ◽  
Social Organization ◽  
Mating Systems ◽  
Genetic Relatedness ◽  
Ecological Factors ◽  
Island Endemic ◽  
Monogamous Species ◽  
The Social ◽  
Socially Monogamous ◽  
Genetic Mating System

Abstract:Patterns of social organization and mating systems have been shown to be functions of ecological factors such as resource allocation and breeding density. In some species, particularly birds, social organization and genetic mating systems differ with molecular studies providing evidence of extra-pair young frequently occurring within broods of socially monogamous species. Here we examine the social and genetic mating system of an ecologically little-known forest raptor endemic to the island of Hispaniola in the Caribbean. From 2005–2009, our field observations of over 60 breeding pairs verified a social mating system of monogamy for the species. During the same time period, we collected blood samples (n= 146 birds, 48 nests) and used microsatellite profiles from 10 loci to estimate genetic relatedness among nestlings in a brood and assign putative fathers. We found no evidence of extra-pair paternity in 41 broods. We had one instance where a social male was not assigned as the putative father, however, the confidence level of this assignment was not significant since the genotypes of the social and assigned males were very similar. Our results support our hypothesis that genetic monogamy would be exhibited by Ridgway's hawk, an island-endemic tropical raptor.

Social ethology of the wolverine

2018 ◽  
Author(s):  
Jeffrey P. Copeland ◽  
Arild Landa ◽  
Kimberly Heinemeyer ◽  
Keith B. Aubry ◽  
Jiska van Dijk ◽  
...  
Keyword(s):  
Social Organization ◽  
Social Interactions ◽  
Resource Availability ◽  
Social Behaviour ◽  
Social System ◽  
Group Living ◽  
Field Studies ◽  
Ecological Framework ◽  
The Social ◽  
Living Species

Social behaviour in solitary carnivores has long been an active area of investigation but for many species remains largely founded in conjecture compared to our understanding of sociality in group-living species. The social organization of the wolverine has, until now, received little attention beyond its portrayal as a typical mustelid social system. In this chapter the authors compile observations of social interactions from multiple wolverine field studies, which are integrated into an ecological framework. An ethological model for the wolverine is proposed that reveals an intricate social organization, which is driven by variable resource availability within extremely large territories and supports social behaviour that underpins offspring development.

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