Results 161 to 170 of about 3,578 (189)
Some of the next articles are maybe not open access.
Sexual dimorphism in wings and wing bands of Sympetrum pedemontanum (Müller in Allioni 1776)
Zoomorphology, 2015Sexual dimorphism is common in animals and derives from two mechanisms: sexual selection and sexual niche divergence. These mechanisms may work together as determinants of wing shape in pigmented wings of Odonata. On the one hand, sexual selection by females tends to enlarge the wing areas of males that host pigments; on the other hand, sex-specific ...
Sönke Hardersen +2 more
exaly +3 more sources
Biological Journal of the Linnean Society, 1985
Dimorphism of tergal wing-folding spicule patches and wing-toiletry fringes accompanies wing dimorphism in the ladybird, Rhyzobius litura. Such dimorphism of ‘ancillary' structures is of rare occurrence in the Coleoptera; other instances are discussed. Data are presented concerning the incidence of long and short winged individuals of R.
exaly +2 more sources
Dimorphism of tergal wing-folding spicule patches and wing-toiletry fringes accompanies wing dimorphism in the ladybird, Rhyzobius litura. Such dimorphism of ‘ancillary' structures is of rare occurrence in the Coleoptera; other instances are discussed. Data are presented concerning the incidence of long and short winged individuals of R.
exaly +2 more sources
The evolutionary significance of wing dimorphism in carabid beetles (Coleoptera: Carabidae)
Researches on Population Ecology, 1995Abstract A review of data on the background of wing dimorphism in carabid beetles (Coleoptera: Carabidae) and especially of the closely related Calathus cinctus and C. melanocephalus is given. In both Calathus
exaly +3 more sources
Why is there so much genetic variation for wing dimorphism?
Researches on Population Ecology, 1994AbstractWing dimorphism appears in general to be determined either by a single locus, 2 allele system in which brachyptery is dominant, or by the additive action of numerous loci. In the latter case studies indicate that the heritability is typically quite large.
exaly +2 more sources
Natural Selection and Sexual Size Dimorphism in Red-Winged Blackbirds
Evolution, 1994Patterns of overwinter mortality in the sexually dimorphic red-winged blackbird (Agelaius phoeniceus) were examined to test the predictions of the sexual-selection hypothesis that male size is limited by directional selection favoring small males and that female size is maintained by stabilizing selection wherein extreme phenotypes experience higher ...
Patrick J, Weatherhead, Robert G, Clark
openaire +2 more sources
A mathematical model for wing dimorphism in maleCardiocondyla ants
Journal of Ethology, 1994Several species ofCardiocondyla ants have dimorphic males: wingless (ergatoid) and winged (alate) males, while otherCardiocondyla species includingC. nuda have only wingless males. We made an evolutionarily stable strategy model for explaning the male polymorphism and the ratios of wingless males in the genusCardiocondyla. Wingless males emerge earlier
Nobuyuki Tsuji +2 more
openaire +1 more source
Variations in calling behaviour of wing dimorphic male crickets
Ecological Entomology, 2022Abstract A trade‐off between flight and reproduction has been well studied in wing dimorphic female insects but less attention has been given to this trade‐off in males ...
Yang Zeng +2 more
openaire +1 more source
Population Ecology, 1994
AbstractThe hypothesis that the morphological, physiological, and behavioral traits comprising the migratory syndrome in insects are genetically correlated through pleiotropic effects of genes controlling the titre of a common hormonal determinant is explored. Evidence that juvenile hormone (JH) influences the component traits of the migratory syndrome
openaire +1 more source
AbstractThe hypothesis that the morphological, physiological, and behavioral traits comprising the migratory syndrome in insects are genetically correlated through pleiotropic effects of genes controlling the titre of a common hormonal determinant is explored. Evidence that juvenile hormone (JH) influences the component traits of the migratory syndrome
openaire +1 more source
Oecologia, 1987
Short-winged forms of the bug, Jadera aeola, were discovered during the late dry season at a study site on Barro Colorado Island, Panama. They were smaller than long-winged adults not only in elytron and hindwing sizes but also in head, thorax, rostrum and hind femur dimentions. When newly emerged adults were kept under natural photothermal conditions,
S, Tanaka, H, Wolda
openaire +2 more sources
Short-winged forms of the bug, Jadera aeola, were discovered during the late dry season at a study site on Barro Colorado Island, Panama. They were smaller than long-winged adults not only in elytron and hindwing sizes but also in head, thorax, rostrum and hind femur dimentions. When newly emerged adults were kept under natural photothermal conditions,
S, Tanaka, H, Wolda
openaire +2 more sources
The physiological costs of flight capability in wing‐dimorphic crickets
Population Ecology, 1994AbstractNutritional indices, triglyceride levels and flight muscle developmental profiles were compared between long‐winged (LW) and short‐winged (SW; flightless) morphs of the crickets Gryllus rubens Scudder and G. firmus Scudder. This was done to identify potential physiological costs of flight capability in adults.
Anthony J. Zera, Simon Mole
openaire +1 more source