Sperm Transfer during Copulation in the Marine Sculpin Hemitripterus villosus (Pisces: Scorpaeniformes) by Means of a Retractable Genital Duct and Ovarian Secretion in Females

Copeia ◽  
1996 ◽  
Vol 1996 (2) ◽  
pp. 452 ◽  
Author(s):  
Hiroyuki Munehara
Keyword(s):  
Sperm Transfer ◽  
Genital Duct ◽  
Hemitripterus Villosus

Sperm Digestion and Reciprocal Sperm Transfer Can Drive Hermaphrodite Sex Allocation to Equality

1999 ◽  
Vol 153 (4) ◽  
pp. 421 ◽  
Author(s):  
Greeff ◽  
Michiels
Keyword(s):  
Sex Allocation ◽  
Sperm Transfer ◽  
Sperm Digestion

scholarly journals A unique mating pattern of Panorpodes kuandianensis (Mecoptera: Panorpodidae)

2017 ◽  
Vol 86 (3) ◽  
pp. 229-237 ◽  
Author(s):  
Xin Tong ◽  
Lu Jiang ◽  
Bao-Zhen Hua
Keyword(s):  
Mating Behavior ◽  
Sexual Conflict ◽  
Sperm Transfer ◽  
Nuptial Gift ◽  
Mating Pattern ◽  
End To End ◽  
Mating Behaviors ◽  
First Time

Sexually reproductive insects exhibit diverse mating behaviors. However, the mating pattern remains unknown for Panorpodes of Panorpodidae to date. In this study, we investigated the mating behavior and copulatory mechanism of the short-faced scorpionfly Panorpodes kuandianensis Zhong, Zhang and Hua, 2011 for the first time. The results show that the male provides a salivary mass as a nuptial gift to the female and starts to copulate with the female in a V-shaped position, then changes to an end-to-end position by temporarily twisting the female abdominal segments VII−IX by 180°. During mating the basal processes and the basal teeth of the gonostyli and the hypandrium are used to obtain copulation and sustain the coupling of genitalia to secure successful sperm transfer. This unique mating pattern is greatly different from that of other Mecoptera reported and is likely evolved as an adaptation in the context of sexual conflict.

scholarly journals Functional morphology of immature mating in a widow spider

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Lenka Sentenská ◽  
Aileen Neumann ◽  
Yael Lubin ◽  
Gabriele Uhl
Keyword(s):  
Sperm Competition ◽  
Storage Conditions ◽  
Sperm Storage ◽  
Sperm Transfer ◽  
Costs And Benefits ◽  
Micro Computed Tomography ◽  
Mating Tactics ◽  
Adult Females ◽  
Storage Organs ◽  
Widow Spider

Abstract Background Mating generally occurs after individuals reach adulthood. In many arthropods including spiders, the adult stage is marked by a final moult after which the genitalia are fully developed and functional. In several widow spider species (genus Latrodectus), however, immature females may mate a few days before they moult to adulthood, i.e. in their late-subadult stage. While the “adult” mating typically results in cannibalism, males survive the “immature” mating. During both “immature” and “adult” matings, males leave parts of their paired copulatory organs within female genitalia, which may act as mating plugs. To study potential costs and benefits of the two mating tactics, we investigated female genital morphology of the brown widow spider, L. geometricus. Light microscopy, histology and micro-computed tomography of early-subadult, late-subadult and adult females were conducted to determine the overall pattern of genital maturation. We compared genitalia of mated late-subadult and adult females to reveal potential differences in the genitalic details that might indicate differential success in sperm transfer and different environments for sperm storage and sperm competition. Results We found that the paired sperm storage organs (spermathecae) and copulatory ducts are developed already in late-subadult females and host sperm after immature mating. However, the thickness of the spermathecal cuticle and the staining of the secretions inside differ significantly between the late-subadult and adult females. In late-subadult females mating plugs were found with higher probability in both spermathecae compared to adult females. Conclusions Sperm transfer in matings with late-subadult females follows the same route as in matings with adult females. The observed differences in the secretions inside the spermathecae of adult and late-subadult females likely reflect different storage conditions for the transferred sperm which may lead to a disadvantage under sperm competition if the subadult female later re-mates with another male. However, since males mating with late-subadult females typically transfer sperm to both spermathecae they might benefit from numerical sperm competition as well as from monopolizing access to the female sperm storage organs. The assessment of re-mating probability and relative paternity will clarify the costs and benefits of the two mating tactics in light of these findings.

scholarly journals Juvenile fish assemblages in the Jinju Bay region, Korea

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Se Hun Myoung ◽  
Seok Nam Kwak ◽  
Jin-Koo Kim ◽  
Won-Chan Lee ◽  
Jeong Bae Kim ◽  
...  
Keyword(s):  
Dominant Species ◽  
Fish Assemblages ◽  
Juvenile Fish ◽  
Young Fish ◽  
Monthly Basis ◽  
Southern Korea ◽  
Pleuronichthys Cornutus ◽  
Pennahia Argentata ◽  
Hemitripterus Villosus ◽  
Number Of Individuals

AbstractAssemblages of juvenile fish and associated abiotic parameters were investigated inside and outside Jinju Bay in southern Korea, on a monthly basis from December 2014 to November 2015. Fluctuations in water temperature and salinity were larger inside than outside the bay. In total, 534,657 individuals per square kilometre from 81 fish species and 47 families were collected during the study period. The most dominant species was Nuchequula nuchalis both inside (25.6%) and outside (26.9%) the bay. The next dominant species were Thryssa kammalensis (17.9%) and Zoarces gillii (16.0%) inside the bay and Liparis tanakae (16.9%) and T. kammalensis (9.0%) outside the bay. Forty species (33% of total number of individuals) of young fish were recorded inside the bay and 47 species (52%) outside the bay. Therefore, it appears that a diversity of fish use nursery grounds inside and outside Jinju Bay. In particular, the following six species appeared: Z. gillii, Pleuronichthys cornutus, L. tanakae, Hemitripterus villosus, Pennahia argentata, and Xenocephalus elongates. Due to assemblage differences for fishes within Jinju Bay and outside the bay, management of both areas is required to maintain current diversity of species in the region.

scholarly journals A rapid and effective nonsurgical artificial insemination protocol using the NSET™ device for sperm transfer in mice without anesthesia

2015 ◽  
Vol 24 (4) ◽  
pp. 775-781 ◽  
Author(s):  
Barbara J. Stone ◽  
Kendra H. Steele ◽  
Angelika Fath-Goodin
Keyword(s):  
Artificial Insemination ◽  
Sperm Transfer

Effects of temperature on mating duration, sperm transfer and remating frequency in Callosobruchus chinensis

2009 ◽  
Vol 55 (2) ◽  
pp. 113-116 ◽  
Author(s):  
Masako Katsuki ◽  
Takahisa Miyatake
Keyword(s):  
Sperm Transfer ◽  
Callosobruchus Chinensis ◽  
Mating Duration ◽  
Effects Of Temperature

scholarly journals Pattern of sperm transfer in redback spiders: implications for sperm competition and male sacrifice

2004 ◽  
Vol 15 (5) ◽  
pp. 785-792 ◽  
Author(s):  
Lindsay S. E. Snow ◽  
Maydianne C. B. Andrade
Keyword(s):  
Sperm Competition ◽  
Sperm Transfer

scholarly journals Genital Duct Development on Streak Gonad Side in Fifteen Children with 45, X and Y-containing Chromosome Mosaicism

1993 ◽  
Vol 2 (1) ◽  
pp. 27-32
Author(s):  
Yoshihiro Kakizawa ◽  
Reiko Ito ◽  
Itsuro Hibi ◽  
Ayako Tanae ◽  
Toshiaki Tanaka ◽  
...  
Keyword(s):  
Genital Duct ◽  
Chromosome Mosaicism ◽  
Duct Development

scholarly journals A Novel Body Plan Alters Diversification of Body Shape and Genitalia in Live-Bearing Fish

2021 ◽  
Vol 9 ◽  
Author(s):  
R. Brian Langerhans ◽  
Eduardo Rosa-Molinar
Keyword(s):  
Complex Traits ◽  
Body Shape ◽  
Body Plan ◽  
The Body ◽  
Sperm Transfer ◽  
Body Region ◽  
Adaptive Divergence ◽  
Male Body ◽  
Correlated Evolution ◽  
Anterior Transposition

Major evolutionary innovations can greatly influence subsequent evolution. While many major transitions occurred in the deep past, male live-bearing fishes (family Poeciliidae) more recently evolved a novel body plan. This group possesses a three-region axial skeleton, with one region—the ano-urogenital region—representing a unique body region accommodating male genitalic structures (gonopodial complex). Here we evaluate several hypotheses for the evolution of diversity in this region and examine its role in the evolution of male body shape. Examining Gambusia fishes, we tested a priori predictions for (1) joint influence of gonopodial-complex traits on mating performance, (2) correlated evolution of gonopodial-complex traits at macro- and microevolutionary scales, and (3) predator-driven evolution of gonopodial-complex traits in a post-Pleistocene radiation of Bahamas mosquitofish. We found the length of the sperm-transfer organ (gonopodium) and its placement along the body (gonopodial anterior transposition) jointly influenced mating success, with correlational selection favoring particular trait combinations. Despite these two traits functionally interacting during mating, we found no evidence for their correlated evolution at macro- or microevolutionary scales. In contrast, we did uncover correlated evolution of modified vertebral hemal spines (part of the novel body region) and gonopodial anterior transposition at both evolutionary scales, matching predictions of developmental connections between these components. Developmental linkages in the ano-urogenital region apparently play key roles in evolutionary trajectories, but multiple selective agents likely act on gonopodium length and cause less predictable evolution. Within Bahamas mosquitofish, evolution of hemal-spine morphology, and gonopodial anterior transposition across predation regimes was quite predictable, with populations evolving under high predation risk showing more modified hemal spines with greater modifications and a more anteriorly positioned gonopodium. These changes in the ano-urogenital vertebral region have facilitated adaptive divergence in swimming abilities and body shape between predation regimes. Gonopodium surface area, but not length, evolved as predicted in Bahamas mosquitofish, consistent with a previously suggested tradeoff between natural and sexual selection on gonopodium size. These results provide insight into how restructured body plans offer novel evolutionary solutions. Here, a novel body region—originally evolved to aid sperm transfer—was apparently co-opted to alter whole-organism performance, facilitating phenotypic diversification.

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