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Competitive males have higher quality sperm in a monogamous social bee
(BioMed Central, 2016)
Abstract
Background
Reproductive success is determined by the interplay between mating and fertilization success. In social insect species with male-biased sex ratios and ...
Burrow ornamentation in the fiddler crab (Uca leptodactyla): female mate choice and male–male competition
(2016-09-02)
Non-biological ornamentation is found in the nests and burrows of different kinds of animals. We evaluated here whether sand hoods constructed by male fiddler crabs (Uca leptodactyla) are one of the signals used by males ...
The effects of genetic manipulation, dieldrin treatment and irradiation on the mating competitiveness of male Anopheles arabiensis in field cages
(2014-08-13)
Abstract
Background
To enable the release of only sterile male Anopheles arabiensis mosquitoes for the sterile insect technique, the genetic background of a wild-type strain was modified to create ...
Group structure predicts variation in proximity relationships between male–female and male–infant pairs of mountain gorillas (Gorilla beringei beringei)
Relationships between conspecifics are influenced by both ecological factors and the social organization they live in. Systematic variation of both—consistent with predictions derived from socioecology models—is well ...
Ejaculate allocation in Brachyura: What do males of Metacarcinus edwardsii respond to?
(2018)
In polygynous species, the sperm economy hypothesis predicts that males can adjust the amount of their ejaculate during copulation in response to (1) individual traits of females according to potential female fecundity, ...
Variable assessment of wing colouration in aerial contests of the red-winged damselfly Mnesarete pudica (Zygoptera, Calopterygidae)
(2015)
Wing pigmentation is a trait that predicts the outcome of male contests in some damselflies. Thus, it is reasonable to suppose that males would have the ability to assess wing pigmentation and adjust investment in a fight ...
Trade-offs in male display activity with lek size
(2016-09-01)
In lek mating systems, males aggregate and defend arenas where they display for females; females select and mate with a male and then solely raise their offspring. Generally, female visits and copulations increase and ...
Alternative mating tactics in dimorphic males of the harvestman Longiperna concolor (Arachnida: Opiliones)
(SPRINGER, 2011)
Intense male-male competition for females may drive the evolution of male morphological dimorphism, which is frequently associated with alternative mating tactics. Using modern techniques for the detection of discontinuous ...
Notes on the breeding behaviour of the Neotropical toadlet Dendrophryniscus brevipollicatus (Anura: Bufonidae), a bromeliad phytotelmata specialist
(2017-01-27)
Anurans are considered to have the greatest diversity of reproductive modes among the major groups of terrestrial vertebrates. In the Bufonidae, oviposition can occur in pools and give rise to exotrophic tadpoles (e.g., ...
Male mating success is related to body condition and stress-induced leukocyte response in an anuran with scramble competition
(National Research Council Canada-NRC Research Press, 2020-06)
Competition among males can be a decisive factor for successful mating in anuranexplosive breeders with a male-biased population sex ratio. The Yungas Red-belly toad Melanophryniscus rubriventris (Vellard, 1947) is an ...