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1. Absence of Mate Choice and Postcopulatory Benefits in a Species with Extreme Sexual Size Dimorphism

Author:
Marie‐Claire Chelini; Eileen A. Hebets; S. Foster
Source:
Ethology 2016 v.122 no.2 pp. 95-104
ISSN:
0179-1613
Subject:
Thomisidae; animal behavior; copulation; dimorphism; evolution; fecundity; females; males; prediction; progeny; sex preselection
Abstract:
... Most hypotheses related to the evolution of female‐biased extreme sexual size dimorphism (SSD) attribute the differences in the size of each sex to selection for reproduction, either through selection for increased female fecundity or selection for male increased mobility and faster development. Very few studies, however, have tested for direct fitness benefits associated with the latter – small m ...
DOI:
10.1111/eth.12449

2. Acoustic differentiation in a sub-oscine calls: females call with more entropy than males

Author:
Alejandro Ariel Ríos-Chelén; Xhareni Díaz-Lezama; Bibiana Montoya
Source:
Journal of ornithology 2020 v.161 no.2 pp. 429-437
ISSN:
2193-7192
Subject:
acoustics; breeding season; dimorphism; discriminant analysis; entropy; females; males; principal component analysis; regression analysis
Abstract:
... We quantified variation at the individual, pair and sex levels in acoustic attributes of Vermilion Flycatcher (Pyrocephalus rubinus)’s peent calls. We recorded calls of 15 pairs during the breeding season, and analyzed seven acoustic measures encompassing temporal, frequency and entropy measures. We run Principal Component Analysis to reduce the number of acoustic parameters; the first three princ ...
DOI:
10.1007/s10336-019-01740-0

3. Adaptive significance of wing dimorphism in males of Nilaparvata lugens

Author:
Novotný, V.
Source:
Entomologia experimentalis et applicata 1995 v.76 no.3 pp. 233-239
ISSN:
0013-8703
Subject:
Nilaparvata lugens; body weight; dimorphism; females; habitats; juvenile hormones; males; morphs; population density
Abstract:
... The trade-offs associated with macroptery in males were investigated in a wing-dimorphic planthopper, Nilaparvata lugens (Stål) (Delphacidae, Hemiptera). Developmental time of brachypters was significantly shorter than that of macropters across a wide range of population densities, while no within-population differences between wing morphs in body weight were found. In mating experiments, brachypt ...
DOI:
10.1111/j.1570-7458.1995.tb01967.x

4. Age and growth of the ajime-loach,niwaella delicata, in the yura river, kyoto, japan

Author:
Yuichi Kano
Source:
Ichthyological research 2000 v.47 no.2 pp. 183-186
ISSN:
1341-8998
Subject:
Cobitidae; dimorphism; females; indigenous species; males; rivers; sexual maturity; Japan
Abstract:
... The age of the Ajime-loach,Niwaella delicata (a species endemic to Japan), was determined from the number of concentric rings appearing on the cross-sectional surface of the erectile spine (peculiar to Cobitidae). The ages of loaches caught in the Yura River, Kyoto, were determined and growth rates for each sex estimated. It was found that size dimorphism in this species was due to different growt ...
DOI:
10.1007/BF02684239

5. Age and sex determination of gaur Bos gaurus (Bovidae)

Author:
Farshid S. Ahrestani; Herbert H.T. Prins
Source:
Mammalia 2011 v.75 no.2 pp. 151-155
ISSN:
1864-1547
Subject:
Bos gaurus; adults; age structure; animal age; animal morphology; captive animals; females; horns; males; mithuns; sex determination; zoo animals; zoos; India; United States
Abstract:
... One reason why the gaur Bos gaurus is a poorly understood species is because there are no reliable data to age and sex individuals. We studied captive gaur for two years in Mysore Zoo, India and Omaha Zoo, USA, and determined age-specific differences in morphological features and physical growth, by measuring shoulder height, of male and female gaur. We fitted von Bertalanffy growth functions to t ...
DOI:
10.1515/mamm.2010.078

6. Age, growth, and reproductive biology of the Atlantic spadefish Chaetodipterus faber in southern Brazil

Author:
Marcelo Soeth; Luis Fernando Fávaro; Henry Louis Spach; Felippe Alexandre Daros; Ana Emília Woltrich; Alberto Teodorico Correia
Source:
Ichthyological research 2019 v.66 no.1 pp. 140-154
ISSN:
1341-8998
Subject:
Chaetodipterus; coasts; dimorphism; estuaries; females; fisheries; gonadosomatic index; gonads; histology; latitude; longevity; males; migratory behavior; otoliths; reproduction; sex ratio; spawning; Atlantic Ocean; Brazil
Abstract:
... This is the first study to investigate the age, growth and reproductive biology of the Atlantic spadefish Chaetodipterus faber in southern Brazil. A total of 625 individuals [total length (TL) ranging from 7 mm to 510 mm] were sampled at the Paranaguá Estuarine Complex (PEC) and adjacent coastal areas over a year (August 2015 to July 2016). Age estimation based on sagittal otolith cross section sh ...
DOI:
10.1007/s10228-018-0663-2

7. Aggressive responses of nesting prairie falcons to territorial intruders

Author:
HOLTHUIJZEN ANTHONIE M. A.; OOSTERHUIS LENORA
Source:
Wilson bulletin 2004 v.116 no.3 pp. 257-261
ISSN:
0043-5643
Subject:
Aquila chrysaetos; Buteo jamaicensis; Cathartes aura; Circus; Corvus; Falco sparverius; Lynx rufus; dimorphism; eagles; falcons; females; food availability; hawks; males; nesting; nesting sites; Idaho; Turkey (country)
Abstract:
... From 1984 through 1987, we studied aggressive responses of Prairie Falcons (Falco mexicanus) to species intruding into their nesting territories in southwestern Idaho (52 nesting attempts, 613 days, 9,085 hr). Prairie Falcons responded aggressively most frequently to Common Ravens (Corvus corax; 49%% of encounters), followed by Red-tailed Hawks (Buteo jamaicensis; 24%%), Golden Eagles (Aquila chry ...
DOI:
10.1676/03-086

8. All-female monosex culture in the freshwater prawn Macrobrachium rosenbergii – A comparative large-scale field study

Author:
Tom Levy; Ohad Rosen; Brit Eilam; Dudu Azulay; Idan Zohar; Eliahu D. Aflalo; Ayana Benet; Alon Naor; Assaf Shechter; Amir Sagi
Source:
Aquaculture 2017 v.479 pp. 857-862
ISSN:
0044-8486
Subject:
Macrobrachium rosenbergii; animals; biotechnology; crustacean culture; dimorphism; feed conversion; females; growth performance; males; mixed culture; ponds; social structure; survival rate
Abstract:
... In crustacean aquaculture, size dimorphism between males and females is the main key factor determining the advantage of monosex aquaculture over that of mixed populations. This factor is particularly relevant for the freshwater prawn, Macrobrachium rosenbergii, for which intensification of cultures is complicated by a complex social structure in which large dominant males are territorial and inhi ...
DOI:
10.1016/j.aquaculture.2017.07.039

9. Allometry of the baculum in the wolf (Canis lupus, Canidae) as an indicator of viability and quality in males

Author:
Alexander Čanády; Ľuboš Čomor
Source:
Zoology and ecology 2015 v.25 no.3 pp. 192-198
ISSN:
2165-8013
Subject:
Canis lupus; allometry; body size; body weight; dimorphism; females; genes; males; mating behavior; viability; wolves
Abstract:
... The aim of this study was to investigate the hypothesis that the baculum of the wolf may be used as a reliable indicator of good genes to female mates during mating. The wolf is a species where pair bonds are formed via strength of pre-copulatory mate choice surmised from the degree of male-biased sexual size dimorphism found in this species. Results in this study showed that a positive, linear re ...
DOI:
10.1080/21658005.2015.1044164

10. Alternative mating tactics in dimorphic males of the harvestman Longiperna concolor (Arachnida: Opiliones)

Author:
Camila Zatz; Rachel M. Werneck; Rogelio Macías-Ordóñez; Glauco Machado
Source:
Behavioral ecology and sociobiology 2011 v.65 no.5 pp. 995-1005
ISSN:
0340-5443
Subject:
Opiliones; dimorphism; eggs; evolution; females; legs; males; tropics
Abstract:
... 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 allometries, we describe male dimorphism in the Neotropical harvestman Longiperna concolor, the males of which use their elongated, sexually dimorphic legs IV in fights for the ...
DOI:
10.1007/s00265-010-1103-0

11. Analysis of environmental correlates of sexual segregation in northern elephant seals using species distribution models

Author:
Jonatan J. Gomez; Marcelo H. Cassini
Source:
Marine biology 2014 v.161 no.2 pp. 481-487
ISSN:
0025-3162
Subject:
Internet; Mirounga angustirostris; adults; biogeography; cold; dimorphism; entropy; environmental assessment; females; foraging; habitats; insulating materials; latitude; males; models; oceans; seals; temperature
Abstract:
... Elephant seals are among the most sexually dimorphic and polygynous species of all mammals. Their foraging grounds occupy a wide area of the world oceans, where they show spatial segregation between males and females. The objective of this paper was to correlate female and male foraging distributions of Mirounga angustirostris with main climatic variables at a biogeographical scale. We used websit ...
DOI:
10.1007/s00227-013-2337-y

12. Andrew meets Rensch: sexual size dimorphism and the inverse of Rensch’s rule in Andrew’s toad (Bufo andrewsi)

Author:
Wen Bo Liao; Wen Chao Liu; Juha Merilä
Source:
Oecologia 2015 v.177 no.2 pp. 389-399
ISSN:
0029-8549
Subject:
Bufo; age structure; body size; dimorphism; fecundity; females; field experimentation; gender differences; males; sexual selection; toads
Abstract:
... Variation in sexual size dimorphism (SSD) is a widespread phenomenon and is commonly attributed to variation in sex-specific patterns of selection. According to Rensch’s rule, SSD increases with increasing body size when males are the larger sex, and decreases when females are the larger sex. Using data from 17 populations of Andrew’s toad (Bufo andrewsi), we tested whether the patterns of SSD con ...
DOI:
10.1007/s00442-014-3147-8

13. Assessing sex‐related chick provisioning in greater flamingo Phoenicopterus roseus parents using capture–recapture models

Author:
Miguel A. Rendón; Araceli Garrido; Manuel Rendón‐Martos; José M. Ramírez; Juan A. Amat; Alexandre Roulin
Source:
journal of animal ecology 2014 v.83 no.2 pp. 479-490
ISSN:
0021-8790
Subject:
Phoenicopterus; body condition; breeding; breeding season; chicks; competitive exclusion; dimorphism; females; foods; foraging; gender differences; lakes; males; models; parents; probability; progeny; stable isotopes; trophic relationships; wetlands
Abstract:
... In sexually dimorphic species, the parental effort of the smaller sex may be reduced due to competitive exclusion in the feeding areas by the larger sex or physiological constraints. However, to determine gender effects on provisioning patterns, other intrinsic and extrinsic factors affecting parental effort should be accounted for. Greater flamingos (Phoenicopterus roseus) exhibit sexual size dim ...
DOI:
10.1111/1365-2656.12138
PubMed:
26046373

14. Associations between gastrointestinal-tract function and the stress response after weaning in pigs

Author:
J. R. Pluske; D. W. Miller; S. O. Sterndale; D. L. Turpin
Source:
Animal production science 2019 v.59 no.11 pp. 2015-2022
ISSN:
1836-0939
Subject:
air quality; animal welfare; disease susceptibility; females; gastrointestinal system; livestock transport; males; pathophysiology; psychological stress; sexual dimorphism; stocking rate; stress response; swine; temperature; weaning
Abstract:
... Psychosocial stress is a major factor driving gastrointestinal-tract (GIT) pathophysiology and disease susceptibility in both humans and animals. Young weaned pigs typically undergo psychosocial and environmental stressors associated with production practices, including separation from their dam, mixing and crowding stress, transport and changed temperature and air-quality parameters, all of which ...
DOI:
10.1071/AN19279

15. Associations of CTLA4 +49 A/G Dimorphism and HLA-DRB1*/DQB1* Alleles With Type 1 Diabetes from South India

Author:
Ravi Padma-Malini; Chinniah Rathika; Sivanadham Ramgopal; Vijayan Murali; Pannerselvam Dharmarajan; Subramanian Pushkala; Karuppiah Balakrishnan
Source:
Biochemical genetics 2018 v.56 no.5 pp. 489-505
ISSN:
0006-2928
Subject:
alleles; dimorphism; females; genetic polymorphism; genotype; genotyping; insulin-dependent diabetes mellitus; patients; India
Abstract:
... The aim of present study was to elucidate the association of CTLA4 +49 A/G and HLA-DRB1*/DQB1* gene polymorphism in south Indian T1DM patients. The patients and controls (n = 196 each) were enrolled for CTLA4 and HLA-DRB1*/DQB1* genotyping by RFLP/PCR-SSP methods. The increased frequencies of CTLA4 ‘AG’ (OR = 1.99; p = 0.001), ‘GG’ (OR = 3.94; p = 0.001) genotypes, and ‘G’ allele (OR = 2.42; p = 9 ...
DOI:
10.1007/s10528-018-9856-7

16. Bateman's principle and immunity in a sex-role reversed pipefish

Author:
ROTH, O.; SCHARSACK, J.P.; KELLER, I.; REUSCH, T.B.H.
Source:
Journal of evolutionary biology 2011 v.24 no.7 pp. 1410-1420
ISSN:
1010-061X
Subject:
Syngnathus typhle; Vibrio; dimorphism; eggs; females; immune response; immune system; immunocompetence; life history; longevity; males; mammals; mating frequency; pathogens; progeny; reproduction; secondary contact
Abstract:
... In diverse animal species, from insects to mammals, females display a more efficient immune defence than males. Bateman's principle posits that males maximize their fitness by increasing mating frequency whereas females gain fitness benefits by maximizing their lifespan. As a longer lifespan requires a more efficient immune system, these implications of Bateman's principle may explain widespread i ...
DOI:
10.1111/j.1420-9101.2011.02273.x
PubMed:
21545418

17. Bee-Mediated Selection Favors Floral Sex Specialization in a Heterantherous Species: Strategies to Solve the Pollen Dilemma

Author:
Larissa C. Oliveira; Alberto L. Teixido; Renata Trevizan; Vinícius L. G. Brito
Source:
Plants 2020 v.9 no.12 pp. -
ISSN:
2223-7747
Subject:
Macairea; Radula; bees; dimorphism; females; flower morphology; flowers; gametophytes; gender differences; hermaphroditism; males; phenotype; pollen; pollen flow; population; reproductive success; shape
Abstract:
... Animal-pollinated plants show a broad variation in floral morphology traits and gametophyte production within populations. Thus, floral traits related to plant reproduction and sexuality are usually exposed to pollinator-mediated selection. Such selective pressures may be even stronger in heterantherous and pollen flowers, in which pollen contributes to both bee feeding and pollination, overcoming ...
DOI:
10.3390/plants9121685

18. Behavioural and morphological dimorphism of the sexes: an account of two primitively eusocial wasps

Author:
Ruchira Sen; Raghavendra Gadagkar
Source:
Journal of natural history 2011 v.45 no.21-22 pp. 1295-1309
ISSN:
1464-5262
Subject:
dimorphism; nests; males; social insects; methodology; reproductives; Ropalidia marginata; foraging; brood rearing; females; researchers
Abstract:
... In social Hymenoptera, foraging, nest building, brood care and all other colony maintenance functions are carried out by the females while males function solely as reproductives. This asymmetry in social roles of the two sexes has led social insect researchers to focus almost exclusively on the females whereas males have remained relatively neglected. We studied two sympatric, primitively eusocial ...
DOI:
10.1080/00222933.2011.552808

19. Bergmann meets Scholander: geographical variation in body size and insulation in the koala is related to climate

Author:
Natalie J. Briscoe; Andrew Krockenberger; Kathrine A. Handasyde; Michael R. Kearney; Melodie McGeoch
Source:
Journal of biogeography 2015 v.42 no.4 pp. 791-802
ISSN:
0305-0270
Subject:
Phascolarctos cinereus; animals; biogeography; body size; climatic factors; dimorphism; fasting; females; fur; geographical variation; head; heat transfer; insulating materials; linear models; males; regression analysis; temperate zones; temperature; tropics; Australia
Abstract:
... AIM: Body size often varies clinally, with dominant explanations centred on how body size influences heat exchange (e.g. Bergmann's rule). However, for endotherms, pelage properties can also dramatically alter heat exchange – a point emphasized by Scholander in the 1950s but which has received little attention in biogeographical analyses. Here, we investigate how geographical variation in both bod ...
DOI:
10.1111/jbi.12445

20. Bite-force performance and head shape in a sexually dimorphic crevice-dwelling lizard, the common chuckwalla [Sauromalus ater (= obesus)]

Author:
LAPPIN, A. KRISTOPHER; HAMILTON, PAUL S.; SULLIVAN, BRIAN K.
Source:
Biological journal of the Linnean Society 2006 v.88 no.2 pp. 215-222
ISSN:
0024-4066
Subject:
copulation; dimorphism; females; head; lizards; males; predators; sexual selection
Abstract:
... The Common Chuckwalla [Sauromalus ater (= obesus)] is a large, sexually dimorphic lizard with a flattened head that takes refuge from predators in rock crevices. Males use their relatively large heads to bite competing males during territorial fights and to restrain females during copulation. Flattened heads with an antipredator function (i.e. seeking refuge in crevices) and enlarged heads with in ...
DOI:
10.1111/j.1095-8312.2006.00615.x

21. Body Size and Age Structure of a Breeding Population of the Japanese Common Toad, Bufo Japonicus Formosus (Amphibia: Bufonidae)

Author:
Kusano Tamotsu; Maruyama Kazuko; Kaneko Shigenori
Source:
Current herpetology 2010 v.29 no.1 pp. 23-31
ISSN:
1881-1019
Subject:
Bufo; adults; age; age structure; body size; breeding; breeding season; dimorphism; females; males; phalanges; toads
Abstract:
... The body size and age structure of a breeding population of the Japanese common toad, Bufo japonicus formosus, was studied at Yamakitamachi in Kanagawa Prefecture for three breeding seasons from 1992 to 1994. Yearly variation in snout-vent length (SVL) was not significant, but the difference in SVL between the sexes was highly significant; the mean SVL of males and females was 125.8 and 134.2 mm, ...
DOI:
10.3105/018.029.0103

22. Body Size, Fecundity, and Sexual Size Dimorphism in the Neotropical Cricket Macroanaxipha macilenta (Saussure) (Orthoptera: Gryllidae)

Author:
R Cueva del Castillo
Source:
Neotropical entomology 2015 v.44 no.2 pp. 116-122
ISSN:
1519-566X
Subject:
Gryllidae; body size; courtship; dimorphism; eggs; entomology; fecundity; females; insects; males; selection response; sexual selection; tropics; vitellogenesis
Abstract:
... Body size is directly or indirectly correlated with fitness. Body size, which conveys maximal fitness, often differs between sexes. Sexual size dimorphism (SSD) evolves because body size tends to be related to reproductive success through different pathways in males and females. In general, female insects are larger than males, suggesting that natural selection for high female fecundity could be s ...
DOI:
10.1007/s13744-014-0266-1

23. 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

24. 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

25. 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

26. Born to be bee, fed to be worker? The caste system of a primitively eusocial insect

Author:
Nayuta Brand; Michel Chapuisat
Source:
Frontiers in zoology 2012 v.9 no.1 pp. 212
ISSN:
1742-9994
Subject:
Halictus; body size; breeding; dietary restriction; dimorphism; females; foods; hibernation; insects; lipid content; males; mothers; nectar; nests; phenotype; pollen; progeny; rearing; winter
Abstract:
... INTRODUCTION: Primitively eusocial halictid bees are excellent systems to study the origin of eusociality, because all individuals have retained the ancestral ability to breed independently. In the sweat bee Halictus scabiosae, foundresses overwinter, establish nests and rear a first brood by mass-provisioning each offspring with pollen and nectar. The mothers may thus manipulate the phenotype of ...
DOI:
10.1186/1742-9994-9-35
PubMed:
23216648
PubMed Central:
PMC3538649

27. Brain size evolution in pipefishes and seahorses: the role of feeding ecology, life history and sexual selection

Author:
M. Tsuboi; A. C. O. Lim; B. L. Ooi; M. Y. Yip; V. C. Chong; I. Ahnesjö; N. Kolm
Source:
Journal of evolutionary biology 2017 v.30 no.1 pp. 150-160
ISSN:
1010-061X
Subject:
Syngnathidae; ancestry; body size; brain; correlation; data collection; dimorphism; females; life history; males; mating behavior; mating competitiveness; polyandry; sexual selection; vertebrates
Abstract:
... Brain size varies greatly at all taxonomic levels. Feeding ecology, life history and sexual selection have been proposed as key components in generating contemporary diversity in brain size across vertebrates. Analyses of brain size evolution have, however, been limited to lineages where males predominantly compete for mating and females choose mates. Here, we present the first original data set o ...
DOI:
10.1111/jeb.12995

28. Breeding of YY super-male of blotched snakehead (Channa maculata) and production of all-male hybrid (Channa argus ♀ × C. maculata ♂)

Author:
Jian Zhao; Mi Ou; Yaping Wang; Haiyang Liu; Qing Luo; Xinping Zhu; Baixiang Chen; Kunci Chen
Source:
Aquaculture 2021 v.538 pp. 736450
ISSN:
0044-8486
Subject:
Channa argus; Channa maculata; aquaculture; artificial insemination; average daily gain; dimorphism; females; fish; genotype; growth performance; hybrids; industry; interspecific hybridization; males; prices; progeny; sex ratio; sex reversal; China
Abstract:
... Many commercially important fish species show significant sex dimorphism in growth and size. Breeding mono-sex stocks could improve economic benefits of farmers. The snakehead fish is massively cultured in China, over 0.5 million tons per year. The sex dimorphism of snakehead is remarkable, in which males are meanly twice in growth and size than females. Furtherly, the individual size of the marke ...
DOI:
10.1016/j.aquaculture.2021.736450

29. The CKI1 Histidine Kinase Specifies the Female Gametic Precursor of the Endosperm

Author:
Li Yuan; Zhenning Liu; Xiaoya Song; Cameron Johnson; Xiaolin Yu; Venkatesan Sundaresan
Source:
Developmental Cell pp. -
ISSN:
1534-5807
Subject:
Arabidopsis; cell specificity; cytokinins; dimorphism; embryo sac; endosperm; females; histidine; histidine kinase; ova
Abstract:
... Since the discovery of double fertilization, it has been recognized that flowering plants produce two highly dimorphic female gametes, the egg cell and central cell. These give rise, respectively, to the embryo and the endosperm, a nourishing tissue unique to flowering plants. Here we show that in Arabidopsis, endosperm formation requires the CYTOKININ INDEPENDENT 1 (CKI1) histidine kinase, an act ...
Handle:
10113/7316610
DOI:
10.1016/j.devcel.2016.03.009
CHORUS:
10.1016/j.devcel.2016.03.009

30. THE CONTENT OF AMINO ACIDS IN ARTIFICIAL DIET INFLUENCES THE DEVELOPMENT AND REPRODUCTION OF BROWN PLANTHOPPER, Nilaparvata lugens (STÅL)

Author:
Xuehua Pan; Kai Lu; Shu Qi; Qiang Zhou
Source:
Archives of insect biochemistry and physiology 2014 v.86 no.2 pp. 75-84
ISSN:
0739-4462
Subject:
Nilaparvata lugens; adulthood; adults; amino acids; artificial diets; dietary protein; dimorphism; egg production; eggs; females; herbivores; insect ecology; larvae; lipids; longevity; nitrogen; nutrient deficiencies; nutrients; nutritional intervention; nymphs; ovarian development; rearing
Abstract:
... Nitrogen availability from dietary protein has profound effects on the physiology and ecology of insect herbivores. The amount of amino acids consumed by Nilaparvata lugens impacts its phenotypic characteristics and reproduction. In this work, we hypothesized that amino acids deficiency leads to physiological trade‐offs between survival and reproduction. We investigated the effect of larval nutrit ...
DOI:
10.1002/arch.21162

31. Castes and asynchronous colony cycle in Polybia bistriata (Fabricius) (Hymenoptera: Vespidae)

Author:
Oliveira, O.A.L. de; Noll, F.B.; Mateus, S.; Gomes, B.
Source:
Neotropical entomology 2007 v.36 no.6 pp. 817-827
ISSN:
1519-566X
Subject:
worker insects; insect morphology; insemination; dimorphism; social insects; queen insects; insect reproduction; insect development; females; Polybia
Abstract:
... Neotropical swarm-founding wasps, the Epiponini, are an outstanding group of social insects whose societies are polygynic and complex nest builders. Caste dimorphism in these wasps ranges from incipient to highly distinct. Morphometric analyses of nine body parts, ovarian status, relative age and development of the 5th gastral sternite gland (Richards[acute accent] gland) of Polybia bistriata Fabr ...
DOI:
10.1590/S1519-566X2007000600001
PubMed:
18246254

32. Characterization of the Distal-less gene homologue, NlDll, in the brown planthopper, Nilaparvata lugens (Stål)

Author:
Xinda Lin; Yun Yao; Minna Jin; Qilin Li
Source:
Gene 2014 v.535 pp. 112-118
ISSN:
0378-1119
Subject:
Drosophila melanogaster; Nilaparvata lugens; RNA interference; adults; dimorphism; females; gene overexpression; genes; insect pests; instars; invertebrates; larvae; morphogenesis; phenotype; transcription factors; wings
Abstract:
... The brown planthopper, Nilaparvata lugens (Stål), is a globally devastating insect pest of rice, particularly in eastern Asia. Distal-less or Dll is a highly conserved and well studied transcription factor required for limb formation in invertebrates and vertebrates. We have identified a homologue of this gene, NlDll, and demonstrated that it is expressed in all life stages of N. lugens, particula ...
DOI:
10.1016/j.gene.2013.11.056

33. Characterization of the European Sea Bass (Dicentrarchus labrax) Gonadal Transcriptome During Sexual Development

Author:
L. Ribas; B. Crespo; N. Sánchez-Baizán; D. Xavier; H. Kuhl; J. M. Rodríguez; N. Díaz; S. Boltañá; S. MacKenzie; F. Morán; S. Zanuy; A. Gómez; F. Piferrer
Source:
Marine biotechnology 2019 v.21 no.3 pp. 359-373
ISSN:
1436-2228
Subject:
Dicentrarchus labrax; ambient temperature; animal ovaries; bass; biomarkers; biosynthesis; developmental stages; dimorphism; females; gene expression; gene expression regulation; genes; genetic factors; lysine; males; microarray technology; ovarian development; sex determination; sex ratio; sexual development; signal transduction; testes; transcription factors; transcriptome; transcriptomics; urinary bladder neoplasms
Abstract:
... The European sea bass is one of the most important cultured fish in Europe and has a marked sexual growth dimorphism in favor of females. It is a gonochoristic species with polygenic sex determination, where a combination between still undifferentiated genetic factors and environmental temperature determines sex ratios. The molecular mechanisms responsible for gonadal sex differentiation are still ...
DOI:
10.1007/s10126-019-09886-x

34. Chemical Communication and Reproduction Partitioning in Social Wasps

Author:
Francesca Romana Dani; Stefano Turillazzi
Source:
Journal of chemical ecology 2018 v.44 no.9 pp. 796-804
ISSN:
0098-0331
Subject:
aggression; chemical communication; dimorphism; exocrine glands; females; nests; pheromones; phylogeny; reproduction; social behavior; social structure; social wasps
Abstract:
... Social wasps encompass species displaying diverse social organization regarding colony cycle, nest foundation, caste differences (from none to significant dimorphism) and number of reproductive queens. Current phylogenetic data suggests that sociality occured independently in the subfamily Stenogastrinae and in the Polistinae+Vespinae clade. In most species, including those with the simplest socia ...
DOI:
10.1007/s10886-018-0968-7

35. Cloning and characterization of an mRNA encoding an insulin receptor from the horned scarab beetle Onthophagus nigriventris (Coleoptera: Scarabaeidae)

Author:
Laura Corley Lavine; Laura L. Hahn; Ian A. Warren; Stephen F. Garczynski; Ian Dworkin; Douglas J. Emlen
Source:
Archives of insect biochemistry and physiology 2013 v.82 no.1 pp. 43-57
ISSN:
1520-6327
Subject:
dung beetles; peptides; body length; horns; males; gene expression; amino acids; Onthophagus; females; messenger RNA; morphs; dimorphism; hormone receptors; species diversity; insulin; molecular cloning; growth traits; nutrition; environmental factors; nucleotide sequences
Abstract:
... The insulin signaling pathway is the primary signaling pathway coupling growth with nutritional condition in all animals. Sensitivity to circulating levels of insulin has been shown to regulate the growth of specific traits in a dose-dependent manner in response to environmental conditions in a diversity of insect species. Alternative phenotypes in insects manifest in a variety of morphologies suc ...
Handle:
10113/55824
DOI:
10.1002/arch.21072
PubMed:
23136112

36. Comparative morphology, biology and histology of reproductive development in three lines of Manihot esculenta Crantz (Euphorbiaceae: Crotonoideae)

Author:
P. I. P. Perera; M. Quintero; B. Dedicova; J. D. J. S. Kularatne; H. Ceballos
Source:
AoB plants 2013 v.5 no.0 pp. pls046
Subject:
Manihot esculenta; cassava; dimorphism; females; flowering; gametophytes; histology; males; phenology; pollen; viability
Abstract:
... Cassava flowering with emphasis on flowering pattern, morphology and phenology; pollen biology on viability and dimorphism, and histology on male and female gametophyte development are demonstrated. Reduced pollen viability at anthesis and the existence of pollen tri-morphism are the key findings. ...
DOI:
10.1093/aobpla/pls046
PubMed:
23346343
PubMed Central:
PMC3551401

37. 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 ...

38. Comparative transcriptome analysis on four types of gonadal tissues of blotched snakehead (Channa maculata)

Author:
Mi Ou; Kunci Chen; Dandan Gao; Yanduo Wu; Zhen Chen; Qing Luo; Haiyang Liu; Jian Zhao
Source:
Comparative biochemistry and physiology 2020 v.35 pp. 100708
ISSN:
1744-117X
Subject:
Channa; aquaculture; dimorphism; females; freshwater fish; gene expression regulation; genes; males; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; sequence analysis; sex reversal; steroid hormones; testes; tissues; transcriptome; transcriptomics; China
Abstract:
... Blotched snakehead (Channa maculata) is an economically important freshwater fish in China, of which males grow much faster than females. To illuminate the molecular mechanism of sex differentiation and gonad development, RNA-Sequencing was performed to identify sex-related genes and pathway in gonads of 6-month-old normal XX females (XX-F), normal XY males (XY-M), XY sex reversal females (XY-F) a ...
DOI:
10.1016/j.cbd.2020.100708

39. Comparing colors using visual models

Author:
Rafael Maia; Thomas E White
Source:
Behavioral ecology 2018 v.29 no.3 pp. 649-659
ISSN:
1465-7279
Subject:
color; females; males; models; visual perception
Abstract:
... An outstanding challenge for the study of color traits is how best to use “colour spaces” to represent their visual perception, particularly when asking questions of color difference (e.g. the (dis)similarity of males and females, mimics and models, or sister species, to a given viewer). We use simulations to show that existing methods fail to statistically and biologically estimate the separation ...
DOI:
10.1093/beheco/ary017

40. Comparison of spermatheca morphology between reproductive and non-reproductive females in social wasps

Author:
Gotoh, A.; Billen, J.; Hashim, R.; Ito, F.
Source:
Arthropod structure & development 2008 v.37 no.3 pp. 199-209
ISSN:
1467-8039
Subject:
Vespidae; spermatheca; insect anatomy; insect morphology; females; reproductives; dimorphism; caste determination; social insects
Abstract:
... Social wasps show an obvious evolution of the differentiation in behavior and external size between reproductive and non-reproductive females, with no clear differences in the Stenogastrinae, via overlap in the Polistinae, to clear differences in the Vespinae. In this study, we examined the morphological appearance of the spermatheca in representative species of these three subfamilies. The genera ...
DOI:
10.1016/j.asd.2007.11.001
PubMed:
18342263

41. A Comparison of the Life-History Traits between Diapause and Direct Development iNdividuals in the Cotton Bollworm, Helicoverpa armigera

Author:
Chen Chao; Xia Qin-Wen; Xiao Hai-Jun; Xiao Liang; Xue Fang-Sen
Source:
Journal of insect science 2014 v.14 no.19 pp. 1-12
ISSN:
1536-2442
Subject:
Helicoverpa armigera; adults; body size; diapause; dimorphism; females; larvae; larval development; life history; longevity; males; metamorphosis; photoperiod; population; protogyny; pupae; temperature
Abstract:
... In order to understand the differences of life-history traits between diapause and direct development individuals in the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), the development time, body size, growth rate, and adult longevity were investigated between the two populations, which were induced under 12:12 L:D and 16:8 L:D photoperiods, respectively, at 20, 22, and 25 ...
DOI:
10.1673/031.014.19

42. Comparisons of age, growth, and maturity between male and female, and diploid and triploid individuals in Carassius auratus from Okinawa-jima Island, Japan

Author:
Takada, Mikumi; Tachihara, Katsunori
Source:
Aquatic conservation 2009 v.19 no.7 pp. 806-814
ISSN:
1052-7613
Subject:
sexual maturity; life history; rivers; dimorphism; diploidy; otoliths; males; triploidy; spawning; freshwater fish; hatching; population size; Carassius auratus; females; Ryukyu Archipelago
Abstract:
... 1.Carassius auratus, a primary freshwater fish with bisexual diploid and unisexual gynogenetic triploid lineages, is distributed widely in and around the Eurasian continent and is especially common in East Asia. East Asian C. auratus diverged genetically to form local endemic populations in different regions, and those distributed in the Ryukyu Archipelago form a local endemic population that can ...
DOI:
10.1002/aqc.1032

43. Compensatory effect of egg size dimorphism on hatching asynchrony in Magellanic penguin

Author:
Nahuel Marchisio; Melina Barrionuevo; Esteban Frere
Source:
Journal of avian biology 2021 v.52 no.10 pp. -
ISSN:
0908-8857
Subject:
Spheniscus; body condition; chicks; dimorphism; eggs; females; penguins; progeny; Argentina
Abstract:
... Egg laying is one of the most important phases in a female bird's breeding cycle. Its cost is high because eggs contain all the resources needed for the development of an embryo. Variation in size and quality of eggs can have important long‐term consequences for offspring survival. Hatching asynchrony is known to influence sibling competition in many bird species. Last‐hatched chicks will have a c ...
DOI:
10.1111/jav.02673

44. Competition between relatives and the evolution of dispersal in a parasitoid wasp

Author:
INNOCENT, T.M.; ABE, J.; WEST, S.A.; REECE, S.E.
Source:
Journal of evolutionary biology 2010 v.23 no.7 pp. 1374-1385
ISSN:
1010-061X
Subject:
Melittobia; dimorphism; dispersal behavior; egg production; evolution; females; morphs; parasitic wasps; prediction; sex ratio
Abstract:
... Evolutionary theory predicts that levels of dispersal vary in response to the extent of local competition for resources and the relatedness between potential competitors. Here, we test these predictions by making use of a female dispersal dimorphism in the parasitoid wasp Melittobia australica. We show that there are two distinct female morphs, which differ in morphology, pattern of egg production ...
DOI:
10.1111/j.1420-9101.2010.02015.x
PubMed:
20492084
PubMed Central:
PMC3939352

45. Complex adaptive traits between mating behaviour and post-copulatory sperm behaviour in squids

Author:
Noritaka Hirohashi; Tomohiro Iida; Noriyosi Sato; Sauer H. H. Warwick; Yoko Iwata
Source:
Reviews in fish biology and fisheries 2016 v.26 no.3 pp. 601-607
ISSN:
0960-3166
Subject:
Loligo; Todarodes pacificus; Uroteuthis; adults; body size; carbon dioxide; dimorphism; females; insemination; kin selection; males; mating behavior; risk; sperm competition; spermatozoa; squid; swarming; swarms
Abstract:
... Emergence of male dimorphism within a species is the evolutionary process of disruptive selection. In squids, two types of male mating behaviour, known as alternative reproductive tactics (ARTs), are causally associated with adult body size. Males inseminate promiscuously with the same females; large “consort” males internally, and small “sneaker” males externally. Previously we found that in Hete ...
DOI:
10.1007/s11160-016-9434-1

46. Comprehensive transcriptomic analysis of the process of gonadal sex differentiation in the turbot (Scophthalmus maximus)

Author:
L. Ribas; D. Robledo; A. Gómez-Tato; A. Viñas; P. Martínez; F. Piferrer
Source:
Molecular and Cellular Endocrinology 2016 v.422 pp. 132-149
ISSN:
0303-7207
Subject:
Scophthalmus maximus; animal ovaries; aromatase; dimorphism; females; gene expression; gene expression regulation; genes; juveniles; linkage groups; quantitative trait loci; sex determination; sexual development; testes; transcriptomics; turbot
Abstract:
... The turbot is a flatfish with a ZW/ZZ sex determination system but with a still unknown sex determining gene(s), and with a marked sexual growth dimorphism in favor of females. To better understand sexual development in turbot we sampled young turbot encompassing the whole process of gonadal differentiation and conducted a comprehensive transcriptomic study on its sex differentiation using a valid ...
DOI:
10.1016/j.mce.2015.11.006

47. Conditional male dimorphism and alternative reproductive tactics in a Neotropical arachnid (Opiliones)

Author:
Buzatto, Bruno A.; Requena, Gustavo S.; Lourenço, Rafael S.; Munguía-Steyer, Roberto; Machado, Glauco
Source:
Evolutionary ecology 2011 v.25 no.2 pp. 331-349
ISSN:
0269-7653
Subject:
Opiliones; allometry; arthropods; body size; dimorphism; evolutionarily stable strategy; females; genetic correlation; genetic variation; legs; males; mark-recapture studies; mating behavior; models; morphs; phenotype; tropics
Abstract:
... In arthropods, most cases of morphological dimorphism within males are the result of a conditional evolutionarily stable strategy (ESS) with status-dependent tactics. In conditionally male-dimorphic species, the status' distributions of male morphs often overlap, and the environmentally cued threshold model (ET) states that the degree of overlap depends on the genetic variation in the distribution ...
DOI:
10.1007/s10682-010-9431-0

48. Construction of a Genomic Bacterial Artificial Chromosome (BAC) Library for the Prawn Macrobrachium rosenbergii and Initial Analysis of ZW Chromosome-Derived BAC Inserts

Author:
Ke-Yi Ma; Shu-Hui Yu; Yu-Xin Du; Shi-Qing Feng; Liang-Jie Qiu; Dai-Yi Ke; Mei-Zhong Luo; Gao-Feng Qiu
Source:
Marine biotechnology 2019 v.21 no.2 pp. 206-216
ISSN:
1436-2228
Subject:
DNA; Macrobrachium rosenbergii; bacterial artificial chromosomes; clones; dimorphism; females; genes; genome walking; genomics; males; molecular cloning; nucleotide sequences; screening; sex chromosomes; sex determination; shrimp
Abstract:
... Knowledge on sex determination has proven valuable for commercial production of the prawn Macrobrachium rosenbergii due to sex dimorphism of the male and female individuals. Previous studies indicated that prawn sex is determined by a ZW–ZZ chromosomal system, but no genomic information is available for the sex chromosome. Herein, we constructed a genomic bacterial artificial chromosome (BAC) libr ...
DOI:
10.1007/s10126-018-09873-8

49. Contest versus scramble competition among males pursuing fixed or plastic alternative reproductive tactics

Author:
Corinna von Kuerthy; Michael Taborsky
Source:
Animal behaviour 2016 v.113 pp. 203-212
ISSN:
0003-3472
Subject:
Lamprologus; Mendelian inheritance; aggression; body size; dimorphism; eggs; females; genotype; males; nests; prediction; reproduction; reproductive behavior; shell (molluscs); spawning
Abstract:
... Reproductive and agonistic behaviours typically diverge between individuals pursuing alternative reproductive tactics (ARTs). When tactics are fixed for life, evolutionary theory predicts that the relative frequencies of alternative male genotypes are stabilized in a population by negative frequency dependence. This implies that competition is greatest between males pursuing the same tactic. The c ...
DOI:
10.1016/j.anbehav.2016.01.006

50. Contrasting growth strategies of pond versus marine populations of nine-spined stickleback (Pungitius pungitius): a combined effect of predation and competition?

Author:
Gábor Herczeg; Abigél Gonda; Anna Kuparinen; Juha Merilä
Source:
Evolutionary ecology 2012 v.26 no.1 pp. 109-122
ISSN:
0269-7653
Subject:
Pungitius pungitius; body size; correlation; dimorphism; fecundity; females; fish; intraspecific competition; males; marine environment; ponds; predation
Abstract:
... Gigantism in isolated ponds in the absence of sympatric fish species has previously been observed in nine-spined sticklebacks (Pungitius pungitius). Patterns in sexual size dimorphism suggested that fecundity selection acting on females might be responsible for the phenomenon. However, the growth strategy behind gigantism in pond sticklebacks has not been studied yet. Here, we compared von Bertala ...
DOI:
10.1007/s10682-011-9491-9