Hanging out in tents: social structure, group stability, male behavior, and their implications for the mating system of Ectophylla alba (Chiroptera: Phyllostomidae)

2018 ◽  
Vol 64 (1) ◽  
pp. 11-17
Author(s):  
Bernal Rodríguez-Herrera ◽  
Joaquín Arroyo-Cabrales ◽  
Rodrigo A. Medellín
Keyword(s):  
Social Structure ◽  
Mating System ◽  
Structure Group ◽  
Male Behavior ◽  
Group Stability

Effect of fertility control on a population's productivity

1992 ◽  
Vol 19 (6) ◽  
pp. 623 ◽  
Author(s):  
G. Caughley ◽  
R. Pech ◽  
D. Grice
Keyword(s):  
Social Structure ◽  
Mating System ◽  
Population Control ◽  
Fertility Control ◽  
Feral Horses ◽  
Modes Of Transmission ◽  
Dominant Female ◽  
Feral Dogs ◽  
Group A ◽  
Vertebrate Pests

The effect of a sterilising agent upon the productivity of vertebrate pests, such as feral horses, feral dogs, wild rabbits or fruit-eating birds, depends upon the population's social structure and mating system. We investigated the theoretical effect on productivity of three forms of dominance, two effects of sterilisation on dominance, and four modes of transmission. Seventeen of the possible 24 combinations are feasible but lead to only four possible outcomes. Three of these result in lowered productivity. The fourth, where the breeding of a dominant female suppresses breeding in the subordinate females of her group, leads to a perverse outcome. Productivity increases with sterilisation unless the proportion of females sterilised exceeds (n–2)/(n–1) where n (>2) is the number of females in the group. A knowledge of social structure and mating system is therefore highly desirable before population control by suppressing female fertility is attempted or even contemplated.

Group Formation by Two-Year Olds

1980 ◽  
Vol 3 (3) ◽  
pp. 287-298 ◽  
Author(s):  
Daniel G. Frankel ◽  
Tali Arbel
Keyword(s):  
Young Children ◽  
Social Structure ◽  
Dominance Hierarchy ◽  
Social Norm ◽  
Social Conflict ◽  
Group Formation ◽  
Group Stability ◽  
Dominance Structure ◽  
Play Group

In order to study a process of group formation among young children, six 2-year-olds were observed during the first four weeks of a daily play group. Results suggested that the children formed a dominance structure that corresponded with increased group stability. The dominance hierarchy appeared to reflect a more general social structure than just an ordering for who could successfully aggress against whom; it was correlated with centrality orderings for non-agonistic behaviors. The absence of a co-ordination between hierarchic orderings for different forms of agonism, however, suggested that the group was not characterized by a fully unified structure, at least not by the end of fourweeks. Analyses also indicated that social asymmetry or status was not the only factor that systematically affected the resolution of social conflict. Prior possession of an object too seemed to constitute an important social norm.

The significance of sexual dimorphism in the mating system of two species of tephritid flies (Aciurina trixa and Valentibulla dodsoni) (Diptera: Tephritidae)

1987 ◽  
Vol 65 (1) ◽  
pp. 194-198 ◽  
Author(s):  
Gary Dodson
Keyword(s):  
Sexual Dimorphism ◽  
Mating System ◽  
Mating Systems ◽  
Natural Populations ◽  
Adaptive Significance ◽  
Male Behavior ◽  
Field Cage ◽  
Copulatory Success

The mating systems of Aciurina trixa and Valentibulla dodsoni (Diptera: Tephritidae) were observed in natural populations and field cage studies. Measurements of field-collected individuals of both species revealed that females were larger than males based on five size categories, but males had larger forefemora. Male behavior suggested that selection might favor increased foreleg size, due to a resulting enhancement of male ability to seize females prior to mounting. Male forefemur size was found to be a predictor of copulatory success in both species. Hypotheses concerning the adaptive significance of this sexual dimorphism are discussed.

Inferring the mating system in the burrowing shrimp Lepidophthalmus bocourti (Decapoda, Axiidea, Callichiridae) from the social structure and sexual dimorphism

2021 ◽  
Vol 75 (6) ◽  
Author(s):  
Patricio Hernáez ◽  
Erick Villegas-Castro ◽  
Marcio Camargo Araujo João ◽  
Rafael Campos Duarte ◽  
Marcelo M. Rivadeneira
Keyword(s):  
Sexual Dimorphism ◽  
Social Structure ◽  
Mating System ◽  
The Social

Social structure and mating system of sperm whales off northern Chile

2004 ◽  
Vol 82 (8) ◽  
pp. 1360-1369 ◽  
Author(s):  
Amanda K Coakes ◽  
Hal Whitehead
Keyword(s):  
Social Structure ◽  
Mating System ◽  
Relative Abundance ◽  
Northern Chile ◽  
Physeter Macrocephalus ◽  
Sperm Whales ◽  
The Social ◽  
Mean Size ◽  
Males And Females ◽  
The Mean

We studied the social structure and mating system of sperm whales (Physeter macrocephalus L., 1758) off northern Chile over 10 months in 2000, photographically identifying 898 individuals. The mean size of encountered groups of females with immatures was about 23 animals, while the estimated mean size of units (sets of females and immatures with permanent relationships) was 11 animals. About 4% of the population consisted of large mature males, although this varied seasonally. Groups of females and immatures, as well as large males, spent only a matter of days within the study area at a time. There was no evidence for preferred ranges for the males, for males consistently accompanying particular groups, or for males forming coalitions. Males roved between the groups of females and immatures. Both mature males and females or immatures appeared to take the initiative in maintaining or breaking close associations. These results are similar to those from studies off the Galápagos Islands, even though the habitat, nonsocial behaviour, and relative abundance of mature males were quite different in the two areas.

Mating System and Social Structure

2007 ◽  
pp. 167-194 ◽  
Author(s):  
W. C. Jordan ◽  
I. A. Fleming ◽  
D. Garant
Keyword(s):  
Social Structure ◽  
Mating System

scholarly journals Stochasticity in social structure and mating system drive extinction risk

Ecosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Damon Leach ◽  
Allison K. Shaw ◽  
Christopher Weiss‐Lehman
Keyword(s):  
Social Structure ◽  
Mating System ◽  
Extinction Risk
Sign in / Sign up

Export Citation Format

Share Document