Sperm Allocation Strategies Depending on Female Quality in Medaka (Oryzias latipes)

2020 ◽  
Vol 37 (3) ◽  
pp. 203
Author(s):  
Yuki Kondo ◽  
Masanori Kohda ◽  
Yasunori Koya ◽  
Satoshi Awata
Keyword(s):  
Oryzias Latipes ◽  
Sperm Allocation ◽  
Female Quality ◽  
Allocation Strategies

scholarly journals Cryptic male choice: sperm allocation strategies when female quality varies

2002 ◽  
Vol 15 (2) ◽  
pp. 201-209 ◽  
Author(s):  
K. Reinhold ◽  
J. Kurtz ◽  
L. Engqvist
Keyword(s):  
Male Choice ◽  
Sperm Allocation ◽  
Female Quality ◽  
Allocation Strategies

scholarly journals THE EVOLUTION OF SPERM-ALLOCATION STRATEGIES AND THE DEGREE OF SPERM COMPETITION

Evolution ◽  
2005 ◽  
Vol 59 (3) ◽  
pp. 492-499 ◽  
Author(s):  
Paul D. Williams ◽  
Troy Day ◽  
Erin Cameron
Keyword(s):  
Sperm Competition ◽  
Sperm Allocation ◽  
Allocation Strategies

Sperm Allocation Strategies and Female Resistance: A Unifying Perspective

2008 ◽  
Vol 172 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Lutz Fromhage ◽  
John M. McNamara ◽  
Alasdair I. Houston
Keyword(s):  
Female Resistance ◽  
Sperm Allocation ◽  
Allocation Strategies

Different sperm allocation strategies in two populations of the semiterrestrial crabNeohelice granulata(Brachyura, Grapsoidea, Varunidae)

2015 ◽  
Vol 37 (4) ◽  
pp. 737-749 ◽  
Author(s):  
María P. Sal Moyano ◽  
María A. Gavio ◽  
Tomás Luppi
Keyword(s):  
Sperm Allocation ◽  
Two Populations ◽  
Allocation Strategies

THE EVOLUTION OF SPERM-ALLOCATION STRATEGIES AND THE DEGREE OF SPERM COMPETITION

Evolution ◽  
2005 ◽  
Vol 59 (3) ◽  
pp. 492 ◽  
Author(s):  
Paul D. Williams ◽  
Troy Day ◽  
Erin Cameron
Keyword(s):  
Sperm Competition ◽  
Sperm Allocation ◽  
Allocation Strategies

No evidence for strategic male mating effort in response to female weight in a bushcricket

Behaviour ◽  
2007 ◽  
Vol 144 (10) ◽  
pp. 1179-1192 ◽  
Author(s):  
Klaus Reinhold ◽  
Hasan Sevgili
Keyword(s):  
Empirical Studies ◽  
Theoretical Models ◽  
Male Mating ◽  
Female Size ◽  
Male Body ◽  
Sperm Number ◽  
Sperm Allocation ◽  
Mating History ◽  
Female Quality ◽  
Spermatophore Size

AbstractTheoretical models predict that males should allocate sperm in response to female quality and empirical studies have shown that fecundity traits including age, mass and mating status can influence male sperm allocation strategies. We tested whether female size has an influence on sperm allocation in the bushcricket Poecilimon jonicus jonicus (Orthoptera: Phaneropterinae). Contrary to other studies, we found neither evidence of strategic sperm allocation in response to female size nor an effect of female size on spermatophore size. Male age and mating history was positively related to sperm number during sequential matings, but had no effect on spermatophylax or ampulla weight. Spermatophore weight, but not sperm number, was positively correlated with male body weight. Ampulla weight was positively correlated with spermatophylax weight.

scholarly journals Strategic sperm allocation under parasitic sex-ratio distortion

2005 ◽  
Vol 2 (1) ◽  
pp. 78-80 ◽  
Author(s):  
Alison M Dunn ◽  
Tara Andrews ◽  
Hannah Ingrey ◽  
Joanna Riley ◽  
Nina Wedell
Keyword(s):  
Sex Ratio ◽  
Mating Behaviour ◽  
Selective Force ◽  
High Fecundity ◽  
Sperm Limitation ◽  
Sperm Allocation ◽  
Ratio Distortion ◽  
The Impact ◽  
Sex Ratio Distortion ◽  
Allocation Strategies

Parasitic sex-ratio distorters are a major selective force in the evolution of host mating behaviour and mate choice. Here, we investigate sperm limitation in the amphipod Gammarus duebeni and the impact of the microsporidian sex-ratio distorter Nosema granulosis on sperm allocation strategies. We show that males become sperm limited after three consecutive matings and provide uninfected, high fecundity, females with more sperm than infected females. We show that sperm limitation leads to a decrease in female productivity. The outcome of sex-ratio distortion has been shown theoretically to be sensitive to the mating limits of males. Our results indicate that strategic sperm allocation under male rarity will have a greater impact on infected females and has the potential to regulate spread of parasitic feminisers in host populations.

scholarly journals Sperm allocation strategies in a sperm heteromorphic insect

2019 ◽  
Vol 66 (3) ◽  
pp. 285-292 ◽  
Author(s):  
Kambiz Esfandi ◽  
Xiong Z He ◽  
Qiao Wang
Keyword(s):  
Reproductive Success ◽  
Empirical Evidence ◽  
Copulation Duration ◽  
Minor Role ◽  
Male Reproductive Success ◽  
Allocation Pattern ◽  
Sperm Allocation ◽  
Focal Male ◽  
Tactile Cues ◽  
Allocation Strategies

Abstract 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 reduce sperm allocation per mate to save sperm for insemination of more mates. However, empirical findings are often inconsistent and reasons behind are unclear. Furthermore, many studies use copulation duration as an estimate of the number of sperm transferred. Yet, empirical evidence for such assumption is largely lacking. Here, we used a sperm heteromorphic insect Ephestia kuehniella whose males produce two types of sperm, eupyrenes (fertile) and apyrenes (nonfertile), to test these postulations. We allowed focal males to detect chemical and acoustic but no tactile cues from rivals or additional mates both before and during mating and measured copulation duration and sperm allocation in successive copulations. We demonstrate that males transfer significantly more eupyrenes per mate in the presence of rivals and that the sperm allocation pattern persists in successive copulations under this condition. However, males do not adjust apyrene allocation in response to rivals probably because apyrenes play a relatively minor role in male reproductive success. Contrary to a previous study, focal males do not respond to additional mates most likely due to the lack of tactile cues in the present study. We reveal that sperm allocation is not a function of copulation duration in this insect for spermatophore formation and delivery occupy most of copulation duration and sperm transfer is complete near the end of copulation.

Use of the Japanese Medaka ( Oryzias latipes ) and Guppy ( Poecilia reticulata ) in Carcinogenesis Testing Under National Toxicology Program Protocols

2003 ◽  
Vol 31 (1) ◽  
pp. 88-91 ◽  
Author(s):  
William E. Hawkins ◽  
William W. Walker ◽  
John W. Fournie ◽  
C. Steve Manning ◽  
Rena M. Krol
Keyword(s):  
Poecilia Reticulata ◽  
Oryzias Latipes ◽  
Japanese Medaka ◽  
National Toxicology Program
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