Prolonged copula duration in the parthenium beetle,Zygogramma bicolorata: an alternative male tactic to amplify sperm transfer, reproductive attributes, and paternity outcomes

2017 ◽  
Vol 164 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Uzma Afaq ◽  
Omkar
Keyword(s):  
Sperm Transfer ◽  
Zygogramma Bicolorata ◽  
Copula Duration

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 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

How biases in sperm storage relate to sperm use during oviposition in female yellow dung flies

2021 ◽  
Author(s):  
Marco Demont ◽  
Paul I Ward ◽  
Wolf U Blanckenhorn ◽  
Stefan Lüpold ◽  
Oliver Y Martin ◽  
...  
Keyword(s):  
Sperm Competition ◽  
Sperm Storage ◽  
Adaptive Plasticity ◽  
Strongly Correlated ◽  
Scathophaga Stercoraria ◽  
General Importance ◽  
Copula Duration ◽  
Mixed Paternity ◽  
Paternity Success ◽  
The Relationship

Abstract Precise mechanisms underlying sperm storage and utilization are largely unknown, and data directly linking stored sperm to paternity remain scarce. We used competitive microsatellite PCR to study the effects of female morphology, copula duration and oviposition on the proportion of stored sperm provided by the second of two copulating males (S2) in Scathophaga stercoraria (Diptera: Scathophagidae), the classic model for sperm competition studies. We genotyped all offspring from potentially mixed-paternity clutches to establish the relationship between a second male’s stored sperm (S2) and paternity success (P2). We found consistent skew in sperm storage across the three female spermathecae, with relatively more second-male sperm stored in the singlet spermatheca than in the doublet spermathecae. S2 generally decreased with increasing spermathecal size, consistent with either heightened first-male storage in larger spermathecae, or less efficient sperm displacement in them. Additionally, copula duration and several two-way interactions influenced S2, highlighting the complexity of postcopulatory processes and sperm storage. Importantly, S2 and P2 were strongly correlated. Manipulation of the timing of oviposition strongly influenced observed sperm-storage patterns, with higher S2 when females laid no eggs before being sacrificed than when they oviposited between copulations, an observation consistent with adaptive plasticity in insemination. Our results identified multiple factors influencing sperm storage, nevertheless suggesting that the proportion of stored sperm is strongly linked to paternity (i.e., a fair raffle). Even more detailed data in this vein are needed to evaluate the general importance of sperm competition relative to cryptic female choice in postcopulatory sexual selection.

Constitutive expression and discovery of antimicrobial peptides in Zygogramma bicolorata (Coleoptera: Chrysomelidae)

2021 ◽  
Author(s):  
Vijaylakshmi Jain ◽  
Pankaj Kishor Mishra ◽  
Meenakshi Mishra ◽  
Veeru Prakash
Keyword(s):  
Antimicrobial Peptides ◽  
Constitutive Expression ◽  
Zygogramma Bicolorata

New record on natural enemies of mexican beetle zygogramma bicolorata

2021 ◽  
Vol 83 (1) ◽  
pp. 48-50
Author(s):  
Anand Harshana
Keyword(s):  
Natural Enemies ◽  
New Record ◽  
Zygogramma Bicolorata

Physiological response of Parthenium hysterophorus to defoliation by the leaf-feeding beetle Zygogramma bicolorata

2018 ◽  
Vol 117 ◽  
pp. 35-42 ◽  
Author(s):  
Blair W. Cowie ◽  
Ed T.F. Witkowski ◽  
Marcus J. Byrne ◽  
Lorraine W. Strathie ◽  
Jeremy M. Goodall ◽  
...  
Keyword(s):  
Physiological Response ◽  
Parthenium Hysterophorus ◽  
Zygogramma Bicolorata
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