scholarly journals Male coercive mating in externally fertilizing species: male coercion, female reluctance and explanation for female acceptance

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Yukio Matsumoto ◽  
Takeshi Takegaki
Keyword(s):  
Coercive Mating

scholarly journals The limits of sexual conflict in the narrow sense: new insights from waterfowl biology

2012 ◽  
Vol 367 (1600) ◽  
pp. 2324-2338 ◽  
Author(s):  
Patricia L. R. Brennan ◽  
Richard O. Prum
Keyword(s):  
Sexual Conflict ◽  
Female Preference ◽  
Indirect Selection ◽  
Direct Selection ◽  
Sensory Bias ◽  
Indirect Benefits ◽  
Female Preferences ◽  
Male Display ◽  
Male Displays ◽  
Coercive Mating

Sexual conflict occurs when the evolutionary interests of the sexes differ and it broadly applies to decisions over mating, fertilization and parental investment. Recently, a narrower view of sexual conflict has emerged in which direct selection on females to avoid male-imposed costs during mating is considered the distinguishing feature of conflict, while indirect selection is considered negligible. In this view, intersexual selection via sensory bias is seen as the most relevant mechanism by which male traits that harm females evolve, with antagonistic coevolution between female preferences and male manipulation following. Under this narrower framework, female preference and resistance have been synonymized because both result in a mating bias, and similarly male display and coercion are not distinguished. Our recent work on genital evolution in waterfowl has highlighted problems with this approach. In waterfowl, preference and resistance are distinct components of female phenotype, and display and coercion are independent male strategies. Female preference for male displays result in mate choice, while forced copulations by unpreferred males result in resistance to prevent these males from achieving matings and fertilizations. Genital elaborations in female waterfowl appear to function in reinforcing female preference to maintain the indirect benefits of choice rather than to reduce the direct costs of coercive mating. We propose a return to a broader view of conflict where indirect selection and intrasexual selection are considered important in the evolution of conflict.

scholarly journals Nuptial feeding and genital coupling of Neopanorpa scorpionflies (Insecta: Mecoptera: Panorpidae) with notal organs of various lengths

2019 ◽  
Vol 88 (4) ◽  
pp. 498-512 ◽  
Author(s):  
Xin Tong ◽  
Bao-Zhen Hua
Keyword(s):  
Salivary Glands ◽  
Feeding Behaviour ◽  
Nuptial Gift ◽  
Posterior Portion ◽  
Mating Tactic ◽  
Nuptial Feeding ◽  
Coercive Mating

Neopanorpa, the second largest genus in Panorpidae, is mainly characterized by the well-developed notal organ on male tergum III. However, it remains largely unknown how the length of the notal organ influences the nuptial feeding behaviour of Neopanorpa. Here, we investigated the nuptial feeding by comparing the morphology of mating-related structures and the genital coupling of a) Neopanorpa lui Chou & Ran, 1981 with a weakly-developed notal organ, b) N. carpenteri Cheng, 1957 with a medium-sized notal organ, and c) N. longiprocessa Hua & Chou, 1997 with an extremely elongated notal organ. The couples of N. lui and N. carpenteri maintain an intermittent mouth-to-mouth mode but do not exchange any edible food. After that the males secrete a salivary mass onto the surface as a nuptial gift, which is distinctly larger in N. carpenteri than in N. lui. Correspondingly, the male salivary glands are more developed in N. carpenteri than in N. lui. Males of N. longiprocessa bear very short salivary glands corresponding to a coercive mating tactic. The genital couplings are similar among the three species of Neopanorpa. The paired hypovalves of males are used to control the cerci of females. The prominent basal processes of male gonostyli grasp the posterior portion of the female medigynium across the intersegmental membrane. The male aedeagus physically couples with the female medigynium to ensure the male phallotreme to connect to the female copulatory pore. The influence of the notal organ length on the nuptial feeding behaviour of Neopanorpa is briefly discussed.

scholarly journals No evidence that male sexual experience increases mating success in a coercive mating system

2019 ◽  
Vol 150 ◽  
pp. 201-208 ◽  
Author(s):  
Maider Iglesias-Carrasco ◽  
Rebecca J. Fox ◽  
Alan Vincent ◽  
Megan L. Head ◽  
Michael D. Jennions
Keyword(s):  
Mating System ◽  
Mating Success ◽  
Sexual Experience ◽  
Coercive Mating

scholarly journals Mating and aggressive behaviour of Brachyrhaphis olomina (Cyprinodontiformes: Poeciliidae)

2017 ◽  
Vol 36 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Carlos A. Garita-Alvarado ◽  
Beatriz Naranjo-Elizondo ◽  
Gilbert Barrantes
Keyword(s):  
Male Genitalia ◽  
Mating Behaviour ◽  
Reproductive Condition ◽  
Mature Ovum ◽  
Link Type ◽  
Video Images ◽  
Sexual Behaviours ◽  
Wide Range ◽  
Aggressive Behaviours ◽  
Coercive Mating

Abstract Despite the increasing interest in the use of intromittent male genitalia and coercive mating behaviour in poeciliids, detailed studies of the mating behaviour of most species in this family are lacking. We describe here the mating and aggressive behaviours of Brachyrhaphis olomina, and correlate them with the condition of the female’s ovum and embryos (immature, mature and pregnant). B. olomina performed a wide range of aggressive (sidle spread, tail beating, coordinate) and mating behaviours (approximation, touch, lateral display, touch-lateral display). Some behaviours (e.g. tail beating) are shared with other poeciliids, but two sexual behaviours (touch and lateral display) and one aggressive (coordinate) behaviour may be unique to B. olomina and were not reported in a previous study. Differences in male behaviour when paired with a female with mature ovum (more mating displays, no agonistic movements) suggest that males detect the female’s reproductive condition from some distance. The distinctive nature of mating behaviour in B. olomina highlights the importance of studying different species to have a better understanding of the evolution of mating and aggressive behaviours in poeciliids. Digital video images related to the article are available at http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo01a, http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo02a and http://www.momo-p.com/showdetail-e.php?movieid=momo170720bo03a.

Mating scars among sharks: evidence of coercive mating?

2018 ◽  
Vol 22 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Erich K. Ritter ◽  
Raid W. Amin
Keyword(s):  
Coercive Mating
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