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You searched for: Publication year rev 7987-2013 Remove constraint Publication year rev: 7987-2013 Subject term dimorphism Remove constraint Subject term: dimorphism Subject term females Remove constraint Subject term: females Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. Body size and shape variation in Ground Beetle Carabus aeruginosus F.-W., 1822 (Coleoptera, Carabidae)

Author:
R. A. Sukhodolskaya; N. I. Eremeeva
Source:
Contemporary problems of ecology 2013 v.6 no.6 pp. 609-615
ISSN:
1995-4255
Subject:
Carabidae; biotopes; body size; dimorphism; environmental factors; females; linear models; males; meadows; morphometry; statistics
Abstract:
... Morphometric variation in Ground Beetle Carabus aeruginosus F.-W. was studied. Beetles were sampled in different habitats in the gradient of disturbance: Kemerovo city, its suburbs and natural biotopes outside the city. We used multidimensional statistics (linear models, PCA and MDS) to show that all environmental factors (anthropogenic press, biotope vegetation) contributed significantly into the ...
DOI:
10.1134/S1995425513060127

2. Bone histology as an approach to providing data on certain key life history traits in mammals: Implications for conservation biology

Author:
Nekane Marín-Moratalla; Xavier Jordana; Meike Köhler
Source:
Mammalian biology = 2013 v.78 no.6 pp. 422-429
ISSN:
1616-5047
Subject:
Addax nasomaculatus; adults; antelopes; bones; case studies; data collection; death; dimorphism; females; growth rings; health status; histology; issues and policy; longevity; males; models; population; reproduction; risk assessment; sexual maturity; wildlife management; zoos
Abstract:
... The knowledge of the life histories of wild mammals is of crucial importance in the field of conservation management. The endangered status of many species calls for faster data collection that can be used in risk assessment and, ultimately, for designing conservation policies. This study is pioneering the potential of bone histology to provide data on life history traits crucial for conservation ...
DOI:
10.1016/j.mambio.2013.07.079

3. Comparative study of architecture and geometry of the date palm male and females inflorescences

Author:
Zango, O.; Littardi, C.; Pintaud, J.C.; Rey, H.
Source:
Acta horticulturae 2013 no.994 pp. 175-192
ISSN:
0567-7572
Subject:
Phoenix dactylifera; dimorphism; females; flowering; flowers; leaves; trees
Abstract:
... The date palm, Phoenix dactylifera L. (Arecaceae), is a subtropical palm widely cultivated for numerous uses and ecosystematic services. The date palm is a dioecious species, which shows a marked dimorphism in inflorescence structure. To describe this dimorphism, architecture and geometry of male and female inflorescences were studied through kinetics of inflorescencial development and architectur ...

4. Diet and reproductive biology of the Starred Agama, Laudakia stellio (Linnaeus, 1758) (Squamata: Agamidae), in the northern Sinai, Egypt

Author:
Adel A. Ibrahim; Moustafa H. El-Naggar
Source:
Zoology in the Middle East 2013 v.59 no.2 pp. 136-143
ISSN:
2326-2680
Subject:
Coleoptera; clutch size; diet; dimorphism; eggs; females; head; insects; males; sexual maturity; Egypt
Abstract:
... We quantified sexual size dimorphism, diet and reproduction in the Starred Agama, Laudakia stellio , in northern Sinai. Males were larger than females in snout-vent length and head index. The species is a sit-and-wait predator and feeds on insects, mainly coleopterans. About 30% of stomachs included plant material. No difference between sexes existed in terms of prey size preference. The reproduct ...
DOI:
10.1080/09397140.2013.810875

5. Does chemical defence increase niche space? A phylogenetic comparative analysis of the Musteloidea

Author:
Kevin Arbuckle; Michael Brockhurst; Michael P. Speed
Source:
Evolutionary ecology 2013 v.27 no.5 pp. 863-881
ISSN:
0269-7653
Subject:
diet; dimorphism; females; foraging; habitats; life history; longevity; mammals; natural enemies; opportunity costs; phylogeny; predation
Abstract:
... Avoidance of predation can impose opportunity costs on prey species that use behavioural avoidance strategies to evade detection. An animal that spends much time hiding or remaining immobile, for example, may have less time for other important activities such as foraging or finding mates. Here we examine the idea that the evolution of chemical defence may act to release prey from these constraints ...
DOI:
10.1007/s10682-013-9629-z

6. 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

7. Foraging segregation in tropical and polar seabirds: Testing the Intersexual Competition Hypothesis

Author:
Patrícia L. Mancini; Alexander L. Bond; Keith A. Hobson; Leandro S. Duarte; Leandro Bugoni
Source:
Journal of experimental marine biology and ecology 2013 v.449 pp. 186-193
ISSN:
0022-0981
Subject:
blood; breeding; breeding season; breeding sites; diet; dimorphism; females; foraging; males; muscles; niches; phylogeny; seabirds; stable isotopes
Abstract:
... The Intersexual Competition Hypothesis (ICH) predicts that sexual size dimorphism (SSD) in seabirds may reduce intraspecific food competition through the exploitation of different trophic niches by each sex. We tested the ICH using stable isotopes (δ15N and δ13C) from whole blood and muscle from six tropical and five polar seabird species sampled at breeding sites. We expected that greater morphol ...
DOI:
10.1016/j.jembe.2013.09.011

8. Leptin, vitamin D, and cardiorespiratory fitness as risk factors for insulin resistance in European adolescents: gender differences in the HELENA Study

Author:
David Jiménez-Pavón; María A. Sesé; Jara Valtueña; Magdalena Cuenca-García; Marcela González-Gross; Frederic Gottrand; Anthony Kafatos; Yannis Manios; Kurt Widhalm; Stefaan de Henauw; Angela Polito; Faustino R. Pérez-López; Luis A. Moreno
Source:
Applied Physiology, Nutrition, and Metabolism 2013 v.39 no.5 pp. 530-537
ISSN:
1715-5320
Subject:
C-reactive protein; adolescence; adolescents; covariance; cross-sectional studies; dietary fat; dimorphism; energy intake; fat body; females; gender differences; homeostasis; insulin resistance; leptin; lifestyle; males; metabolism; odds ratio; physical activity; questionnaires; randomized clinical trials; regression analysis; risk factors; socioeconomic status; vitamin D; Europe
Abstract:
... The purpose of this study was to identify the relevance of a set of risk factors for insulin resistance in adolescents from Europe and to consider their possible gender-specific associations. The Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) was conducted in 1053 European adolescents (mean age, 14.9 years) in a school setting in 9 countries. Three anthr ...
DOI:
10.1139/apnm-2013-0250

9. Male–male contests for mates, sexual size dimorphism, and sex ratio in a natural population of a solitary parasitoid

Author:
Margarete V. Macedo; Ricardo F. Monteiro; Mariana P. Silveira; Peter J. Mayhew
Source:
Behavioural processes 2013 v.100 pp. 1-8
ISSN:
0376-6357
Subject:
Eurytoma; body size; dimorphism; females; life history; males; parasitoids; sex allocation; sex ratio; variance
Abstract:
... Understanding how different behavioural and life history traits interact is fundamental to developing ethological theory. Here we study the interaction of male–male competition for mates and sexual size dimorphism in a solitary wasp, with implications for sex allocation. In Hymenoptera, females are normally larger than males suggesting that males do not benefit as much as females from larger size. ...
DOI:
10.1016/j.beproc.2013.07.003

10. Mating patterns of Gammarus lacustris (Amphipoda: Gammaridae) from three populations across a gradient on the Tibetan Plateau

Author:
T. L. Yu; J. B. Chen
Source:
Italian journal of zoology 2013 v.80 no.4 pp. 608-613
ISSN:
1748-5851
Subject:
Gammarus; body size; dimorphism; fecundity; females; males; microhabitats; population; random mating; sexual selection; zoology; China
Abstract:
... The large-male mating advantage and size-assortative mating are two different size-based patterns which deviate from random mating in Gammarus species. The size-assortative pairing in gammarid amphipods may have arisen for microhabitat segregation, loading constraints, sexual selection, or a combination of them. This study investigated the mating patterns of Gammarus lacustris from three populatio ...
DOI:
10.1080/11250003.2013.849295

11. Morphometric measurements permit accurate sexing of three species of Mesoamerican ground-sparrow (Genus: Melozone)

Author:
Sandoval Luis; Mennill Daniel J.
Source:
Wilson journal of ornithology 2013 v.125 no.3 pp. 471-478
ISSN:
1559-4491
Subject:
adults; beak; birds; ecology; evolution; females; males; morphometry; natural history; sex determination analysis; tail
Abstract:
... The natural history of many tropical bird species is poorly described, preventing more detailed studies of ecology, behavior, and evolution. For most sexually monochromatic tropical bird species, we lack field methodologies to categorize the sex of adults. In this study, we describe sex-based morphological differences of three monochromatic species in the genus Melozone: White-eared Ground-Sparrow ...
DOI:
10.1676/12-177.1

12. Oligomerization and other evolutionary changes in the antennae of tetrastichine wasps (Hymenoptera, Eulophidae)

Author:
O. V. Kosheleva
Source:
Entomological revue 2013 v.93 no.6 pp. 725-736
ISSN:
0013-8738
Subject:
Eulophidae; antennae; dimorphism; evolution; females; males
Abstract:
... The following trends in oligomerization of the male and female antennae in Tetrastichinae were determined. (1) Reduction (shortening) of the basal segment of the funicle. (2) Reduction (shortening) of the middle segments of the funicle (not recorded in chalcids before). (3) Loss of homonomy by the funicle. (4) Fusion of the claval segments. (5) Reduction (shortening) of the apical claval segment. ...
DOI:
10.1134/S0013873813060067

13. Reproduction, growth, and defense trade-offs vary with gender and reproductive allocation in Ilex glabra (Aquifoliaceae)

Author:
Nicholas E. Buckley; Germán Avila-Sakar
Source:
American journal of botany 2013 v.100 no.2 pp. 357-364
ISSN:
0002-9122
Subject:
Ilex glabra; defoliation; dimorphism; females; flowering; herbivores; leaves; males; phenology; prediction; reproductive performance; resource allocation; Nova Scotia
Abstract:
... • Premise of the study: Male-biased herbivory in dioecious species is expected as a consequence of selection for increased resistance (reduced attack) in the sex with higher reproductive costs—females. Empirical support of this prediction is taxonomically restricted and fraught with exceptions. Phenological changes in resource allocation to reproduction may change the trade-offs among functions in ...
DOI:
10.3732/ajb.1200603
PubMed:
23328690

14. Righting time versus shell size and shape dimorphism in adult Hermann’s tortoises: Field observations meet theoretical predictions

Author:
Dragana Stojadinović; Ðurađ Milošević; Jelka Crnobrnja-Isailović
Source:
Animal biology v.63 no.4 pp. 381-396
ISSN:
1570-7555
Subject:
Testudo hermanni; adults; ambient temperature; dimorphism; energy balance; females; geometry; males; prediction; theoretical models; tortoises
Abstract:
... We investigated the relation between righting time (RT) and carapace morphology in 303 adult Hermann’s tortoises (Testudo hermanni Gmelin, 1789) from two geographically close localities. Their size, shape and body mass, adjusted for size, were significantly different between males and females. Righting time differed among the populations and was related to the ambient temperature and the relative ...
DOI:
10.1163/15707563-00002420

15. Sex Determination and Sexual Size Dimorphism in the Red-billed Tropicbird (Phaethon aethereus) and White-tailed Tropicbird (P. lepturus)

Author:
Nunes Guilherme Tavares; Leal Gustavo Da Rosa; Campolina Cynthia; Freitas Thales Renato Ochotorena De; Efe Márcio Amorim; Bugoni Leandro
Source:
Waterbirds 2013 v.36 no.3 pp. 348-352
ISSN:
1524-4695
Subject:
blood; coasts; dimorphism; females; linear models; males; morphometry; seabirds; sex determination; Atlantic Ocean; Brazil
Abstract:
... Tropicbirds (order Phaethontiformes) are a well-studied seabird taxon, but there have been no published studies on sexual size dimorphism. Here, we investigated sexual size dimorphism in the Red-billed Tropicbird (Phaethon aethereus) and the White-tailed Tropicbird (P. lepturus), and evaluated the applicability of using morphometrics and discriminant functions to sex birds in the field. We sampled ...
DOI:
10.1675/063.036.0312

16. Sex ratio adjustments in common terns: influence of mate condition and maternal experience

Author:
María M. Benito; Holger Schielzeth; Jacob González‐Solís; Peter H. Becker
Source:
Journal of avian biology 2013 v.44 no.2 pp. 179-188
ISSN:
0908-8857
Subject:
Sterna hirundo; chicks; clutch size; daughters; dimorphism; females; hatching; mortality; reproductive performance; sex allocation; sex ratio; sons
Abstract:
... Adaptive sex allocation has frequently been studied in sexually size dimorphic species, but far less is known about patterns of sex allocation in species without pronounced sexual size dimorphism. Parental optimal investment can be predicted under circumstances in which sons and daughters differ in costs and/or fitness returns. In common terns Sterna hirundo, previous studies suggest that sons are ...
DOI:
10.1111/j.1600-048X.2012.00024.x

17. Sex-specific vulnerability to breeding conditions in chicks of the sexually monomorphic Gull-billed Tern

Author:
Auxiliadora Villegas; José A. Masero; Casimiro Corbacho; Jorge S. Gutiérrez; Noelia Albano; Juan M. Sánchez-Guzmán
Source:
Journal of ornithology 2013 v.154 no.2 pp. 431-439
ISSN:
2193-7192
Subject:
dimorphism; nutritional status; rearing; males; breeding; early development; metabolites; phenology; environmental factors; sex ratio; progeny; chicks; clutch size; females; nestlings
Abstract:
... Environmental conditions during early development may differentially affect male and female offspring, and the effects of this sex–environment interaction in chick performance may be exaggerated under harsh conditions. In birds, most of the currently available evidence on sex-biased environmental sensitivity in nestlings is derived from species that display sexual size dimorphism, while studies on ...
DOI:
10.1007/s10336-012-0907-2

18. Sexual segregation in red deer: is social behaviour more important than habitat preferences?

Author:
Joana Alves; António Alves da Silva; Amadeu M.V.M. Soares; Carlos Fonseca
Source:
Animal behaviour 2013 v.85 no.2 pp. 501-509
ISSN:
0003-3472
Subject:
Cervus elaphus; adults; age structure; animal behavior; autumn; body size; dimorphism; females; food availability; habitat preferences; habitats; males; peers; social behavior; vertebrates
Abstract:
... Sexual segregation among vertebrates is a common phenomenon, usually assumed to be associated with sexual body size dimorphism and explained by differences in habitat use or social behaviours. Various hypotheses explain sexual segregation in terms of social or habitat factors. The factors controlling sexual segregation are as yet unclear and the hypotheses put forward to explain it have generated ...
DOI:
10.1016/j.anbehav.2012.12.018

19. Sexual segregation in rockhopper penguins during incubation

Author:
Katrin Ludynia; Nina Dehnhard; Maud Poisbleau; Laurent Demongin; Juan F. Masello; Christian C. Voigt; Petra Quillfeldt
Source:
Animal behaviour 2013 v.85 no.1 pp. 255-267
ISSN:
0003-3472
Subject:
Eudyptes; animal behavior; breeding; chicks; coastal water; dimorphism; environmental factors; fasting; females; forage; foraging; gender differences; global positioning systems; habitats; males; models; penguins; stable isotopes; surface water temperature; trophic relationships
Abstract:
... Many animals show sex differences in foraging behaviour, which can be related to sex-specific size dimorphism, avoidance of intersexual competition for depletable resources or different energetic requirements of males and females. In southern rockhopper penguins, Eudyptes chrysocome, both sexes differ in their roles during breeding, which leads to differences in their energetic requirements. We th ...
DOI:
10.1016/j.anbehav.2012.11.001

20. Sexual size dimorphism in the ontogeny of the solitary predatory wasp Symmorphus allobrogus (Hymenoptera: Vespidae)

Author:
Anna Budrienė; Eduardas Budrys; Žaneta Nevronytė
Source:
Comptes rendus 2013 v.336 no.2 pp. 57-64
ISSN:
1631-0691
Subject:
Vespidae; dimorphism; ecology; eggs; females; larvae; larval development; males; ontogeny
Abstract:
... Sex-specific patterns of individual growth, resulting in sexual size dimorphism (SSD), are a little studied aspect of the ontogeny related to the evolutionary history and affected by the ecology of a species. We used empirical data on the development of the predatory wasp Symmorphus allobrogus (Hymenoptera, Vespidae) to test the hypotheses that sexual differences of growth resulting in the female- ...
DOI:
10.1016/j.crvi.2013.03.001

21. Size-biased allocation of prey from male to offspring via female: family conflicts, prey selection, and evolution of sexual size dimorphism in raptors

Author:
Geir A. Sonerud; Ronny Steen; Line M. Løw; Line T. Røed; Kristin Skar; Vidar Selås; Tore Slagsvold
Source:
Oecologia 2013 v.172 no.1 pp. 93-107
ISSN:
0029-8549
Subject:
Falco; birds of prey; dimorphism; evolution; females; food safety; foods; lizards; males; nests; progeny; small mammals
Abstract:
... In birds with bi-parental care, the provisioning link between prey capture and delivery to dependent offspring is regarded as often symmetric between the mates. However, in raptors, the larger female usually broods and feeds the nestlings, while the smaller male provides food for the family, assisted by the female in the latter part of the nestling period, if at all. Prey items are relatively larg ...
DOI:
10.1007/s00442-012-2491-9
PubMed:
23073637