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You searched for: Journal name Behavioral ecology and sociobiology Remove constraint Journal name: Behavioral ecology and sociobiology Subject body size Remove constraint Subject: body size Subject term dimorphism Remove constraint Subject term: dimorphism Subject term females Remove constraint Subject term: females
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1. Sex-specific maternal effect on egg mass, laying order, and sibling competition in the Bengalese finch (Lonchura striata var. domestica)

Author:
Masayo Soma; Daichi S. Saito; Toshikazu Hasegawa; Kazuo Okanoya
Source:
Behavioral ecology and sociobiology 2007 v.61 no.11 pp. 1695-1705
ISSN:
0340-5443
Subject:
adults; body size; breeding; chicks; daughters; dimorphism; early development; eggs; females; gender differences; hatching; males; maternal effect; mothers; sons
Abstract:
... Maternal effects, such as investment in eggs, have profound effects on offspring fitness. Mothers are expected to skew their investment depending on the laying order and sex when unequal sibling competition occurs within a brood because of sex-specific vulnerability and age hierarchy caused by asynchronous hatching. The Bengalese finch hatches asynchronously and shows a moderate reversed sexual si ...
DOI:
10.1007/s00265-007-0400-8

2. Parental care and sexual size dimorphism in wasps and bees

Author:
Gavin Shreeves; Jeremy Field
Source:
Behavioral ecology and sociobiology 2008 v.62 no.5 pp. 843-852
ISSN:
0340-5443
Subject:
Apoidea; birds; body size; dimorphism; eggs; exoskeleton; fecundity; females; invertebrates; males; mammals; nests; parental role; phylogeny; pollen
Abstract:
... Sexual size dimorphism, in which one sex is larger than the other, occurs when body size has differential effects on the fitness of males and females. Mammals and birds usually have male-biased size dimorphism, probably because of strong sexual competition among males. Invertebrates usually have female-biased size dimorphism, perhaps because their inflexible exoskeletons limit ovary size, leading ...
DOI:
10.1007/s00265-007-0510-3

3. Body size and sexual selection in the koala

Author:
William A. H. Ellis; Fred B. Bercovitch
Source:
Behavioral ecology and sociobiology 2011 v.65 no.6 pp. 1229-1235
ISSN:
0340-5443
Subject:
body size; dimorphism; females; males; microsatellite repeats; reproductive performance; sexual selection; sires
Abstract:
... Sexual selection is often characterized by polygynous breeding systems, size dimorphism, and skewed operational sex ratios. Koalas are sexually dimorphic in multiple domains, yet are absent from the literature on sexual selection and the structure of their mating system is unclear. We provide the first documentation of the strength of sexual selection in koalas by using microsatellite markers to i ...
DOI:
10.1007/s00265-010-1136-4

4. Evolution of mating systems and sexual size dimorphism in North American cyprinids

Author:
M. Pyron; T. E. Pitcher; S. J. Jacquemin
Source:
Behavioral ecology and sociobiology 2013 v.67 no.5 pp. 747-756
ISSN:
0340-5443
Subject:
Cyprinidae; body size; dimorphism; females; fish; males; mating systems; models; phylogeny; spawning; sperm competition; testes
Abstract:
... Mating systems evolve with sexual size dimorphism (SSD) in many animals. Mating systems with males larger than females occur when males compete for female access or guard territories, while mating systems with group mating tend to occur in species where females are the same size or larger than males. In addition to variation in SSD with mating system, sperm competition varies among mating systems ...
DOI:
10.1007/s00265-013-1498-5

5. The role of male coloration and ornamentation in potential alternative mating strategies of the dimorphic jumping spider, Maevia inclemens

Author:
Laurel B. Lietzenmayer; David L. Clark; Lisa A. Taylor
Source:
Behavioral ecology and sociobiology 2019 v.73 no.6 pp. 83
ISSN:
0340-5443
Subject:
Salticidae; aggression; antipredatory behavior; aposematic species; body size; cannibalism; color; courtship; dimorphism; females; head; legs; males; morphs; predation; reproductive success; risk; sexual selection; vertebrates
Abstract:
... Polymorphism can arise across taxa due to various selection pressures and potentially lead to alternative mating or antipredator strategies. For male jumping spiders, sexual selection and predation risk are often intertwined when courting cannibalistic females and may be a driving factor in the polymorphism of the jumping spider, Maevia inclemens. The dimorphic males of M. inclemens differ dramati ...
DOI:
10.1007/s00265-019-2691-y