SPERM

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Immune stress and diet influence reproductive fitness in male tuatara (Sphenodon punctatus)
《Current Zoology》2024年第6期786-794,共9页Sarah K.Lamar Diane K.Ormsby Nicola J.Nelson 
funded by a Victoria University of Wellington Doctoral Scholarship;funding was provided by a Herpetological Research Grant from the Society for Research on Reptiles;Amphibians in New Zealand and a Gaige Award from the American Society of Ichthyology and Herpetology.
The theoretical trade-off between immune and endocrine investment in mating animals has received mixed empirical support,particularly in reptiles.We investigated the relationship between male sexual characteristics,di...
关键词：reproductive ftness reptiles sexual selection sperm characteristics TUATARA 
Sperm allocation strategies in a sperm heteromorphic insect被引量：3
《Current Zoology》2020年第3期285-292,共8页Kambiz ESFANDI Xiong Z.HE Qiao WANG 
This work was supported by a Massey University Doctoral Research Scholarship and a Massey University Research Fund.
Theories predict that in polyandrous species,the focal male should increase sperm allocation per mate in the presence of rivals to gain greater share of paternity,but in the presence of additional mates,he should redu...
关键词：Sperm allocation sperm competition copulation duration socio-sexual environment 
Strategic adjustment of copulatory plug size in a nematode
《Current Zoology》2019年第5期571-577,共7页Jorge Canales-LAZCANO Jorge Contreras-GARDUNO Carlos CORDERO 
Copulatory plugs(CP)are substances produced during copulation that block the genital openings of the female.In several species of Nematoda,males produce CP that are thought to impede female remating and thus sperm com...
关键词：copulatory PLUG sexual selection SPERM COMPETITION STRATEGIC EJACULATION nematodes 
Refuge size variation and potential for sperm competition in Wellington tree weta
《Current Zoology》2019年第3期213-223,共11页Tina W.WEY Clint D. KELLY 
Ecological variation in resources can in flue nee the distributi on and en counter rates of potential mates and competitors and, con sequently, the opport unity for sexual selection. Factors that influence the likelih...
关键词：ecological variation MATING dynamics opportunity for SPERM competition POLYANDRY sexual selection 
Sperm priming response to perceived mating opportunities is reduced in male guppies with high baseline sperm production被引量：1
《Current Zoology》2018年第2期205-211,共7页Silvia CATTELAN Andrea PILASTRO 
Producing sperm is costly and males have been selected to strategically adjust their sperm produc- tion and/or expenditure according to the fitness return associated with a specific mating. For exam- ple, males respon...
关键词：artificial selection mate availability Poecilia reticulata sperm investment sperm priming sperm production. 
Male reproductive suppression： not a social affair
《Current Zoology》2017年第5期573-579,共7页Z. Valentina ZlZZRI Andrea JESSEN Joris M. KOENE 
In the animal kingdom there are countless strategies via which males optimize their reproductivesuccess when faced with male-male competition. These male strategies typically fall into two maincategories： pre- and po...
关键词：indirect SPERM transfer  offensive strategies  MALE pre-copulatory competition  MALE REPRODUCTIVE suppression  repro-ductive strategies. 
Attractive males have faster sperm in three-spined sticklebacks Gasterosteus aculeatus被引量：1
《Current Zoology》2013年第6期761-768,共8页Marion MEHLIS Lukas K. HILKE Theo C. M. BAKKER 
Recent studies have revealed that sexually selected traits may signal sperm quality and hence male fertilisation ability. There is also evidence that the expression of male sexual ornamentation and associated sperm ch...
关键词：Mate choice Sperm competition Carotenoids Oxidative stress Reproductive success CASA ImageJ 
A comparison of two methods to assess audience-induced changes in male mate choice
《Current Zoology》2012年第1期84-94,共11页
Multidirectional communicative interactions in social networks can have a profound effect on mate choice behavior. Male Atlantic molly Poecilia mexicana exhibit weaker mating preferences when an audience male is prese...
关键词：Communication networks Male mate choice Non-independent mate choice Sexual selection Sperm competition risk Audience effect 
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