2014
DOI: 10.1186/1471-2148-14-104
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Evolution of sperm morphology in anurans: insights into the roles of mating system and spawning location

Abstract: BackgroundThe degree of postcopulatory sexual selection, comprising variable degrees of sperm competition and cryptic female choice, is an important evolutionary force to influence sperm form and function. Here we investigated the effects of mating system and spawning location on the evolution of sperm morphology in 67 species of Chinese anurans. We also examined how relative testes size as an indicator of the level of sperm competition affected variation in sperm morphology across a subset of 29 species.Resul… Show more

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Cited by 35 publications
(49 citation statements)
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“…; Zeng et al. ). However, we extended these results by also showing positive selection on sperm numbers and, importantly, how both traits jointly ( m * s * and m */ s *) respond to selection.…”
Section: Discussionmentioning
confidence: 98%
See 2 more Smart Citations
“…; Zeng et al. ). However, we extended these results by also showing positive selection on sperm numbers and, importantly, how both traits jointly ( m * s * and m */ s *) respond to selection.…”
Section: Discussionmentioning
confidence: 98%
“…; Anstis ; Zeng et al. ). In the fishes, we recorded the egg deposition site (into nest, onto plants/rocks, into open water/scattering over substrate), water movement (stagnant, flowing/turbulent), and the mating system (pair spawning, pair spawning with additional males, group spawning), primarily based on Teletchea et al.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Following Byrne et al (2002) and Zeng et al (2014), we used the mating system as an imperfect surrogate for the level of sperm competition at two factorial levels (Table S1): simultaneous polyandry (multimale amplexus and simultaneous sperm release, resulting in sperm competition) and monandry (females mate with one male over the course of a breeding season and deposit a single clutch). Additionally, we obtained for each species information on two main types of reproduction, explosive and prolonged breeding, from Fei et al (2010).…”
Section: Sample Collection and Preparationmentioning
confidence: 99%
“…However, the evolution of sperm has to be viewed within the constraints of the selective environment, as selection is likely to favor those sperm that survive and compete best under their specific environmental conditions. Compared to internal fertilizers, in which sperm evolution is greatly affected by the female reproductive tract (Briskie et al 1997;Pitnick et al 1999;Immler et al 2011;Lüpold and Fitzpatrick 2015), extrinsic environmental stressors (e.g., temperature, pH, osmolality) or spawning conditions (e.g., sperm release into water column versus foam nests) can play important roles in external fertilizers (Morisawa et al 1983;Billard et al 1986;Byrne et al 2003;Zeng et al 2014). Additionally, ejaculate-quality traits can be sensitive to the environmental conditions, including sperm length that can change significantly in ectothermic species even at a slight alteration of ambient temperature experienced by males during development or as adults (Blanckenhorn and Hellriegel 2002;Adriaenssens et al 2012;Breckels and Neff 2013;Minoretti et al 2013;Vasudeva et al 2014).…”
Section: Introductionmentioning
confidence: 99%