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189 results for “sexual traits”
Fig. 1 in Sexual Size Dimorphism in Ground Beetle Carabus cumanus Fischer von Waldheim, 1823 (Coleoptera, Carabidae) and its Variation in Different Traits
Fig. 1. Studied morphometric characteristics in C. cumanus (A – elytra length, B – elytra width, V – pronotum length, G – pronotum width, D – head length, E – distance between eyes)
Figures 4-6 from: García-Ulloa D, Landa-Jaime V, Góngora-Gómez AM, García-Ulloa M, Hernández-Sepúlveda J (2019) Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae). Zoologia 36: 1-7. https://doi.org/10.3897/zoologia.36.e29774
Figures 4-6 Pontoniamargarita: (4) male (small and whitish) and female (large and orange); (5) female (circled) in the mantle cavity of P.rugosa; (6) ovigerous female. Scale bar = 1 cm.
Figure 7 from: García-Ulloa D, Landa-Jaime V, Góngora-Gómez AM, García-Ulloa M, Hernández-Sepúlveda J (2019) Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae). Zoologia 36: 1-7. https://doi.org/10.3897/zoologia.36.e29774
Figure 7 Relationship between Pontoniamargarita total body length (mm) and Pinnarugosa shell height (mm). Regressions for females and males were r = 0.32 (p = 0.08) and r = 0.18 (p = 0.46), respectively.
Figures 1-3 from: García-Ulloa D, Landa-Jaime V, Góngora-Gómez AM, García-Ulloa M, Hernández-Sepúlveda J (2019) Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae). Zoologia 36: 1-7. https://doi.org/10.3897/zoologia.36.e29774
Figures 1-3 Morphometric measurements of Pinnarugosa. (1) Shell height; (2) shell length; (3) shell width.
Figure 2 from: Cao C, Yu P, Hayashi F (2019) Allometry and morphological trait relationship in the sexually dimorphic Chinese dobsonfly, Acanthacorydalis asiatica (Wood-Mason, 1884) (Megaloptera, Corydalidae). ZooKeys 854: 119-129. https://doi.org/10.3897/zookeys.854.32897
Figure 2 Log-log relationships between the prothorax length (PL) and the head width (HW in A), mandible length (ML in B), wing length (WL in C), and genital (ectoproct) length (GL in D) in male and female Acanthacorydalisasiatica. Regression lines: Ay = 0.829 x + 0.211 in males and y = 0.773 x + 0.310 in females By = 1.663 x − 0.428 in males and y = 1.113 x − 0.181 in females Cy = 0.582 x + 1.046 in males and y = 0.903 x + 0.823 in females Dy = 0.605 x − 0.094 in males. For statistical tests, see the text.
Figure 1 from: Cao C, Yu P, Hayashi F (2019) Allometry and morphological trait relationship in the sexually dimorphic Chinese dobsonfly, Acanthacorydalis asiatica (Wood-Mason, 1884) (Megaloptera, Corydalidae). ZooKeys 854: 119-129. https://doi.org/10.3897/zookeys.854.32897
Figure 1 Acanthacorydalisasiatica in the dorsal view. A Large male B small male C female. Abbreviations: HW, head width; GL, genital (ectoproct) length in the lateral view; ML, mandible length; PL, prothorax length; WL, wing length. Scale bar: 10 mm.
Data from: Sexual selection and population divergence II. divergence in different sexual traits and signal modalities in field crickets (Teleogryllus oceanicus)
Sexual selection can target many different types of traits. However, the relative influence of different sexually-selected traits during evolutionary divergence is poorly understood. We used the field cricket Teleogryllus oceanicus to quantify and compare how five traits from each of three sexual signal modalities and components diverge among allopatric populations: male advertisement song, cuticular hydrocarbon (CHC) profiles and forewing morphology. Population divergence was unexpectedly consistent: we estimated the among-population (genetic) variance-covariance matrix, D, for all 15 traits, and Dmax explained nearly two-thirds of its variation. CHC and wing traits were most tightly integrated, whereas song varied more independently. We modelled the dependence of among-population trait divergence on genetic distance estimated from neutral markers to test for signatures of selection vs. neutral divergence. For all three sexual trait types, phenotypic variation among populations was largely explained by a neutral model of divergence. Our findings illustrate how phenotypic integration across different types of sexual traits might impose constraints on the evolution of mating isolation and divergence via sexual selection.
Secondary sexual trait melanization in black scavenger flies: nutritional plasticity and its evolution
<p>The black scavenger fly <em>Sepsis thoracica</em> exhibits polyphenic development resulting in alternate small black and large amber male morphs. Although the behavior, ecology, and physiology of both morphs are being scrutinized, the evolutionary origins of the nutritional polyphenism remain poorly understood. I here use a comparative approach to study variation in the degree of melanization of the forefemur —a secondary sexual trait. Melanization showed nutritional plasticity in all species and character mapping suggests polyphenic development to represent the ancestral character state that was lost repeatedly. That is, interspecific variation among the studied species is mainly caused by the loss and not the gain of polyphenic development. Coevolution between male melanization and mating system differences further implicates sexual selection in the evolution of male melanization. These findings highlight the usefulness of comparative and natural history data in shedding new light on the evolution of phenotypic variation.</p>
Genetic Factors and Interrelationships for Sexual Orientation, Susceptibility to HIV and Kaposi's Sarcoma, Alcoholism and Psychological Traits, and Histocompatibility Antigens
ClinicalTrials.gov study NCT00001294. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Dietary stress increases the total opportunity for sexual selection and modifies selection on condition-dependent traits
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Data from: Sexual conflict and sexually transmitted infections (STIs): coevolution of sexually antagonistic host traits with an STI
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Data from: Sexual conflict and correlated evolution between male persistence and female resistance traits in the seed beetle Callosobruchus maculatus
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Data from: Selection for costly sexual traits results in a vacant mating niche and male dimorphism
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Data from: Sexually selected traits evolve positive allometry when some matings occur irrespective of the trait
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Data from: Variable environmental effects on a multi-component sexually selected trait
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Data from: Female social preference for males that have evolved via monogamy: evidence of a trade-off between pre- and post-copulatory sexually selected traits?
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Data from: Condition-dependent expression of pre- and postcopulatory sexual traits in guppies
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Data from: The effects of sexual selection on trait divergence in a peripheral population with gene flow
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Data from: Release from intralocus sexual conflict? Evolved loss of a male sexual trait demasculinises female gene expression
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Data from: Variation and correlations between sexual, asexual and natural enemy resistance life-history traits in a natural plant pathogen population
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