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You searched for: Subject "sperm competition" Remove constraint Subject: "sperm competition"
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1. Common carp spermatozoa performance is significantly affected by ovarian fluid

Author:
Vitaliy Kholodnyy; Kiko Shibata; Atife Tuba Beken; Borys Dzyuba; Hermes Bloomfield-Gadêlha; Jacky Cosson; Sergii Boryshpolets
Source:
Aquaculture 2022 v.554 pp. 738148
ISSN:
0044-8486
Subject:
sperm competition,   etc   ; Cyprinus carpio; Salmonidae; aquaculture; calcium; carp; chemotaxis; evolution; males; spermatozoa;     Show all 10 Subjects
Abstract:
... During evolution, the fish adopted versatile spawning tactics, which allowed them to use sperm competition effectively and prevent fertilization by inappropriate male gametes. Ovarian fluid (OF) affects spermatozoa performance in several fish species, as shown mainly in salmonids, and likely contributes to their reproductive tactics. Common carps utilize different spawning behavior compared to sal ...
DOI:
10.1016/j.aquaculture.2022.738148

2. Male and female developmental temperature modulate post-copulatory interactions in a beetle

Author:
Rachel A. Farrow; D. Charles Deeming; Paul E. Eady
Source:
Journal of thermal biology 2022 v.103 pp. 103155
ISSN:
0306-4565
Subject:
sperm competition,   etc   ; Callosobruchus maculatus; copulation; females; males; phenotype; sexual selection; spermatophores; temperature;     Show all 9 Subjects
Abstract:
... Sexual selection theory has proven to be fundamental to our understanding of the male-female (sperm-egg) interactions that characterise fertilisation. However, sexual selection does not operate in a void and abiotic environmental factors have been shown to modulate the outcome of pre-copularory sexual interactions. Environmental modulation of post-copulatory interactions are particularly likely be ...
DOI:
10.1016/j.jtherbio.2021.103155

3. Evolution of sex allocation plasticity in a hermaphroditic flatworm genus

Author:
Pragya Singh; Lukas Schärer
Source:
Journal of evolutionary biology 2022 v.35 no.6 pp. 817-830
ISSN:
1010-061X
Subject:
sperm competition,   etc   ; Platyhelminthes; evolution; hermaphroditism; interspecific variation; intraspecific variation; plasticity; selfing; sex allocation; spermatozoa;     Show all 10 Subjects
Abstract:
... Sex allocation theory in simultaneous hermaphrodites predicts that optimal sex allocation is influenced by local sperm competition, which occurs when related sperm compete to fertilize a given set of eggs. Different factors, including the mating strategy and the ability to self‐fertilize, are predicted to affect local sperm competition and hence the optimal SA. Moreover, since the local sperm comp ...
DOI:
10.1111/jeb.14020

4. The Effects of a Male Audience on Male and Female Mating Behaviour in the Blood-Sucking Bug Rhodnius prolixus

Author:
Gabriel A. De Simone; Lorena Pompilio; Gabriel Manrique
Source:
Neotropical entomology 2022 v.51 no.2 pp. 212-220
ISSN:
1678-8052
Subject:
sperm competition,   etc   ; Neotropics; Rhodnius prolixus; entomology; females; hematophagous insects; males; reproductive behavior; risk; stereotyped behavior;     Show all 10 Subjects
Abstract:
... Social context is a key factor affecting sexual behaviour and cannot be neglected in gregarious species, such as triatomine blood-sucking bugs. Here we study the influence of the social context on the sexual reproductive behaviour of males and females of Rhodnius prolixus Stål. Specifically, we identify and compare the frequencies and sequence of sexual behaviours exhibited by a focal pair in pres ...
DOI:
10.1007/s13744-021-00935-6

5. Sperm competition intensity affects sperm precedence patterns in a polyandrous gift‐giving spider

Author:
Magdalena Matzke; Søren Toft; Jesper Bechsgaard; Astrid Pold Vilstrup; Gabriele Uhl; Sven Künzel; Cristina Tuni; Trine Bilde
Source:
Molecular ecology 2022 v.31 no.8 pp. 2435-2452
ISSN:
0962-1083
Subject:
sperm competition,   etc   ; copulation; ecology; females; genotyping; males; paternity; polyandry; progeny; selection intensity; sexual selection; spermatozoa; spiders;     Show all 13 Subjects
Abstract:
... Sperm competition drives traits that enhance fertilization success. The amount of sperm transferred relative to competitors is key for attaining paternity. Female reproductive morphology and male mating order may also influence fertilization, however the outcome for sperm precedence under intense sperm competition remains poorly understood. In the polyandrous spider Pisaura mirabilis, males offer ...
DOI:
10.1111/mec.16405

6. Seminal fluid and spermatophore production in a western Atlantic invasive swimming crab, Charybdis hellerii, reveals a different pattern to Portunoidea

Author:
Timóteo T. Watanabe; Laura S. López-Greco; Fernando J. Zara
Source:
Arthropod structure & development 2022 v.66 pp. 101137
ISSN:
1467-8039
Subject:
sperm competition,   etc   ; Charybdis hellerii; arthropods; crabs; dehiscence; electron microscopy; females; gonadosomatic index; invasive species; males; seawater; spermatophores; spermatozoa;     Show all 13 Subjects
Abstract:
... The male reproductive system in Portunoidea is voluminous in order to produce the sperm plug, avoiding sperm competition. The portunid crab, Charybdis hellerii, is a successful invasive species, and this study describes the male reproductive system under light and electron microscopy and evaluates the gonadosomatic index and spermatophore dehiscence compared to other species that produce a sperm p ...
DOI:
10.1016/j.asd.2021.101137

7. Intraspecific variation in testis organisation and sperm head morphology of the delicate mouse (Pseudomys delicatulus): its possible causes and consequences

Author:
Eleanor Peirce; TlalliAztlan Moya-Smith; Chris Leigh; William Breed
Source:
Australian mammalogy 2022 v.44 no.1 pp. 76-80
ISSN:
0310-0049
Subject:
sperm competition,   etc   ; Pseudomys; cryptic species; epididymis; intraspecific variation; lipids; mammalogy; mice; monogamy; polyandry; spermatozoa; tail; Northern Territory; Queensland; Western Australia;     Show all 15 Subjects
Abstract:
... The delicate mouse (Pseudomys delicatulus) ranges from Queensland to northern Western Australia. In this study the morphology of the cellular organisation of the testis and cauda epididymal spermatozoa are compared. Individuals from the mainland of the Northern Territory and Western Australia invariably have only 60–70% of the testes composed of seminiferous tubules with the interstitial tissue be ...
DOI:
10.1071/AM20057

8. Development of new microsatellite loci for wing dimorphic crickets Velarifictorus aspersus and their cross-utility in other Gryllidae species

Author:
Yang Zeng; Ze-Lin Zhou; Yi-Yuan He; Dao-Hong Zhu
Source:
Journal of Asia-Pacific entomology 2021 v.24 no.2 pp. 30-34
ISSN:
1226-8615
Subject:
sperm competition,   etc   ; Gryllidae; entomology; genetic variation; microsatellite repeats; transcriptome;     Show all 6 Subjects
Abstract:
... Microsatellite markers have been used extensively in studies of sperm competition and the genetic diversity of organisms. In the present study, we performed transcriptome sequencing for Velarifictorus aspersus and developed simple sequence repeat markers to identify valuable markers for genetic studies. The average total length of the V. aspersus transcriptome sequence was 7.70 Gb and it contained ...
DOI:
10.1016/j.aspen.2021.04.007

9. Skilful mating? Insights from animal contest research

Author:
Sarah M. Lane; Mark Briffa
Source:
Animal behaviour 2022 v.184 pp. 197-207
ISSN:
0003-3472
Subject:
sperm competition,   etc   ; animal behavior; animals; courtship; ownership; reproductive success;     Show all 6 Subjects
Abstract:
... Whenever resources are limited and indivisible, fighting will evolve as a means to resolve ownership. Among such resources are mates, and individuals (usually males) of many species compete agonistically with rivals in order to gain access to potential mates. However, securing access is not necessarily enough to guarantee a mating or, if a mating is obtained, to guarantee that it is effective for ...
DOI:
10.1016/j.anbehav.2021.03.006

10. Bovine Follicular Fluid Derived Extracellular Vesicles Modulate the Viability, Capacitation and Acrosome Reaction of Bull Spermatozoa

Author:
Mohammad Mehedi Hasan; Qurat Ul Ain Reshi; Freddy Lättekivi; Janeli Viil; Kasun Godakumara; Keerthie Dissanayake; Aneta Andronowska; Ülle Jaakma; Alireza Fazeli
Source:
Biology 2021 v.10 no.11 pp. -
ISSN:
2079-7737
Subject:
sperm competition,   etc   ; acrosome reaction; cattle; females; follicular fluid; sperm capacitation; spermatozoa; swine; trypsin; viability;     Show all 10 Subjects
Abstract:
... While follicular fluid (FF) is known to enhance the functional properties of spermatozoa, the role of FF-derived extracellular vesicles (EVs) in this respect is unknown. We hypothesized that bovine FF EVs convey signals to spermatozoa supporting sperm viability, inducing sperm capacitation and acrosome reaction. In this study, the effects of bovine FF EVs on sperm functions are evaluated. Irrespec ...
DOI:
10.3390/biology10111154

11. On the role of eviction in group living sex changers

Author:
Yoh Iwasa; Sachi Yamaguchi
Source:
Behavioral ecology and sociobiology 2022 v.76 no.4 pp. 49
ISSN:
0340-5443
Subject:
sperm competition,   etc   ; corals; evolutionarily stable strategy; females; hermaphroditism; males; models; risk; sex allocation; sociobiology;     Show all 10 Subjects
Abstract:
... In most sex-changing fishes in coral reefs, a dominant male and multiple females form a mating group (harem). In a few species, the subordinates are simultaneous hermaphrodites that may act as sneakers. In this paper, we ask whether the subordinates in most sex changers choose to be female or whether they are forced to give up their male function to avoid eviction by the harem holder. We consider ...
DOI:
10.1007/s00265-022-03159-9

12. Kinetochore proteins and microtubule‐destabilizing factors are fast evolving in eutherian mammals

Author:
Chiara Pontremoli; Diego Forni; Uberto Pozzoli; Mario Clerici; Rachele Cagliani; Manuela Sironi
Source:
Molecular ecology 2021 v.30 no.6 pp. 1505-1515
ISSN:
0962-1083
Subject:
sperm competition,   etc   ; DNA; chromosome segregation; ecology; eukaryotic cells; kinetochores; mammals; meiotic drive; microtubules; oocytes; phylogeny;     Show all 11 Subjects
Abstract:
... Centromeres have central functions in chromosome segregation, but centromeric DNA and centromere‐binding proteins evolve rapidly in most eukaryotes. The selective pressure(s) underlying the fast evolution of centromere‐binding proteins are presently unknown. An attractive possibility is that selfish centromeres promote their preferential inclusion in the oocyte and centromeric proteins evolve to s ...
DOI:
10.1111/mec.15812

13. Extra‐pair paternity in the wood‐feeding cockroach Cryptocercus punctulatus Scudder: Social but not genetic monogamy

Author:
Hajime Yaguchi; Itaru Kobayashi; Kiyoto Maekawa; Christine A. Nalepa
Source:
Molecular ecology 2021 v.30 no.24 pp. 6743-6758
ISSN:
0962-1083
Subject:
sperm competition,   etc   ; Cryptocercus punctulatus; Hymenoptera; Isoptera; ecology; evolution; males; microsatellite repeats; monogamy; paternity; progeny; spermatheca; spermatozoa;     Show all 13 Subjects
Abstract:
... Subsocial Cryptocercus cockroaches are the sister group to termites and considered to be socially monogamous. Because genetic monogamy is a suggested requirement for evolution of cooperative breeding/eusociality, particularly in hymenopterans, clarification of the mating biology of Cryptocercus would help illuminate evolutionary trends in eusocial insects. To investigate possible extra‐pair patern ...
DOI:
10.1111/mec.16185

14. How can mating systems inform future biobanking strategies? An illustration using two Indonesian bovids, banteng (Bos javanicus) and lowland anoa (Bubalus depressicornis)

Author:
James D. Gillis; William V. Holt; Lisa Yon; Kathryn J. Woad; David Love; Rhudy Holly; Linda M. Penfold
Source:
Animal reproduction science 2022 v.238 pp. 106943
ISSN:
0378-4320
Subject:
sperm competition,   etc   ; Bos javanicus; Bubalus depressicornis; cattle; cryopreservation; endangered species; loss of heterozygosity; monogamy; polygyny; spermatozoa; whole milk;     Show all 11 Subjects
Abstract:
... Storing cryopreserved spermatozoa in a genome resource bank safeguards against the loss of heterozygosity in endangered species and provides opportunities to reincorporate genes into populations through the application of assisted reproductive technologies. The aim of this study was to demonstrate the effect of breeding strategy on ejaculate characteristics to illustrate how this information may b ...
DOI:
10.1016/j.anireprosci.2022.106943

15. The effect of genital stimulation on competitive fertilization success in house mice

Author:
Gonçalo I. André; Renée C. Firman; Leigh W. Simmons
Source:
Animal behaviour 2022 v.190 pp. 93-101
ISSN:
0003-3472
Subject:
sperm competition,   etc   ; animal behavior; copulation; evolution; female genitalia; females; males; neurosecretory system; penis; polyandry; pregnancy; reproductive success; risk;     Show all 13 Subjects
Abstract:
... In species with internal fertilization, copulation is characterized by the mechanical interaction of male and female genitalia. Genital interaction during copulation stimulates the neuroendocrine system, promoting the physiological changes necessary for the initiation of pregnancy. Previous studies on mice have shown that the baculum (penis bone) influences male reproductive success under a compet ...
DOI:
10.1016/j.anbehav.2022.05.015

16. Long-term storage shapes ejaculate traits in a monogamous stingless bee (Scaptotrigona aff. depilis)

Author:
Sheina Koffler; Andreas Hoppe; Kaspar Bienefeld; Astrid de Matos Peixoto Kleinert; Rodolfo Jaffé
Source:
Apidologie 2021 v.52 no.1 pp. 242-251
ISSN:
0044-8435
Subject:
sperm competition,   etc   ; Scaptotrigona; evolution; genetic variance; heritability; males; monogamy; phenotype; social insects; spermatozoa; stingless bees; storage time; viability;     Show all 13 Subjects
Abstract:
... The influence of long-term storage on the evolution of social insect male ejaculates remains a puzzle. Here, we studied the influence of sperm storage on male ejaculates in the stingless bee Scaptotrigona aff. depilis, a species where queens mate with a single male and thus do not trigger sperm competition. We estimated quantitative genetic parameters by sampling males from six colonies and two co ...
DOI:
10.1007/s13592-020-00813-x

17. Pupal Cues Increase Sperm Production but Not Testis Size in an Insect

Author:
Junyan Liu; Xiong Z. He; Xia-Lin Zheng; Yujing Zhang; Qiao Wang
Source:
Insects 2021 v.12 no.8 pp. -
ISSN:
2075-4450
Subject:
sperm competition,   etc   ; Ephestia kuehniella; adults; conspecificity; eclosion; larvae; males; moths; pupae; pupation; resource allocation; risk; spermatogenesis; spermatozoa; testes;     Show all 15 Subjects
Abstract:
... Theoretic and empirical studies show that social surroundings experienced by male insects during their larval or adult stage can influence their testicular investment in diverse ways. Although insect pupae do not feed and crawl, they can communicate using sex-specific and/or non-sex specific cues. Yet, it is unknown, in any insect, whether and how male pupae can fine-tune their resource allocation ...
DOI:
10.3390/insects12080679

18. Gene drives for vertebrate pest control: Realistic spatial modelling of eradication probabilities and times for island mouse populations

Author:
Aysegul Birand; Phillip Cassey; Joshua V. Ross; James C. Russell; Paul Thomas; Thomas A. A. Prowse
Source:
Molecular ecology 2022 v.31 no.6 pp. 1907-1923
ISSN:
0962-1083
Subject:
sperm competition,   etc   ; biodiversity; demography; extinction; genes; invasive species; mice; pest control; polyandry; probability; simulation models; stochastic processes; vertebrate pests;     Show all 13 Subjects
Abstract:
... Invasive alien species continue to threaten global biodiversity. CRISPR‐based gene drives, which can theoretically spread through populations despite imparting a fitness cost, could be used to suppress or eradicate pest populations. We develop an individual‐based, spatially explicit, stochastic model to simulate the ability of CRISPR‐based homing and X chromosome shredding drives to eradicate popu ...
DOI:
10.1111/mec.16361

19. The hidden ageing costs of sperm competition

Author:
Jean‐François Lemaître; Jean‐Michel Gaillard; Steven A. Ramm
Source:
Ecology letters 2020 v.23 no.11 pp. 1573-1588
ISSN:
1461-023X
Subject:
sperm competition,   etc   ; females; males; sexual selection; spermatozoa;     Show all 5 Subjects
Abstract:
... Ageing and sexual selection are intimately linked. There is by now compelling evidence from studies performed across diverse organisms that males allocating resources to mating competition incur substantial physiological costs, ultimately increasing ageing. However, although insightful, we argue here that to date these studies cover only part of the relationship linking sexual selection and ageing ...
DOI:
10.1111/ele.13593

20. Sperm oxidative status varies with the level of sperm competition and affects male reproductive success

Author:
Jose C. Noguera
Source:
Animal behaviour 2022 v.189 pp. 83-89
ISSN:
0003-3472
Subject:
sperm competition,   etc   ; Gryllus bimaculatus; animal behavior; antioxidants; experimental design; males; oxidative stress; progeny; reproductive success; risk; sexual selection; spermatozoa; viability;     Show all 13 Subjects
Abstract:
... Sperm competition theory predicts that males should strategically adjust the allocation of sperm in response to the level of sperm competition (i.e. the number of competing ejaculates). Predictions of sperm competition models have mostly focused on sperm numbers. However, whether males strategically adjust other important traits of their ejaculate such as sperm antioxidants in response to potentia ...
DOI:
10.1016/j.anbehav.2022.04.016