Sperm Competition and Its Evolutionary Consequences in the Insects

Parker, Geoff A.

doi:10.1111/j.1469-185x.1970.tb01176.x

Cited by 3,230 publications

(2,260 citation statements)

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“…Additionally, amongst maleterminated copulations, copulation times significantly increased with the numbers of other males that the female had mated with. These patterns are consistent with predicted behaviours based on models of sperm competition (Parker, 1970;Parker et al, 1997), and with behaviours recorded in both S. lycidas (Wada et al, 2010) and an unidentified pygmy octopus (Cigliano, 1995) where males of these species were reported to adjust copulation times, presumably spent performing sperm removal and transferring multiple spermatophores, with females based on whether they were the last male to mate with her.…”

Section: Discussionsupporting

confidence: 86%

“…Relevant models of sperm competition, where sperm supply is limited, imply that male cephalopods could potentially achieve optimal fertilisation success by investing less time copulating with females that they have already mated with (Parker, 1970), with females that are holding less sperm from competing males and therefore pose less risk of sperm competition (Ball & Parker, 2007), and/or when additional factors such as male mating order might give males an inherent advantage towards successful fertilisation (Parker, 1990). Likewise, male cephalopods should be expected to invest more time and/or spermatophores with novel females and females posing a high-risk of sperm competition (Parker, 1970;1990;Parker et al, 1997;Ball & Parker, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Nocturnal mating behaviour and dynamic male investment of copulation time in the southern blue-ringed octopus, Hapalochlaena maculosa (Cephalopoda: Octopodidae)

Morse

Zenger

McCormick

et al. 2015

Behav

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The southern blue-ringed octopus, Hapalochlaena maculosa (Hoyle, 1883) is a nocturnal species that exhibits a mating system in which females hold sperm from multiple males over a one to two month breeding window before laying a single egg clutch. Contrary to most studied animal mating systems where anisogamy exists, gamete package production is limited for both males and females of this species (~50 spermatophores/eggs). This presents an animal model for studying aspects of sperm competition and dynamic mate choice behaviours. The present study reports on the mating behaviour of H. maculosa observed under laboratory conditions using infrared closed-circuit television video footage. Rates of male copulation attempts increased with male size, while female receptivity to mating attempts increased with female size, resulting in larger animals of both sexes gaining more copulations and spending more time per day in copulation. There was some evidence of female preference of larger males, but no male preference of females based on measured morphological traits. Both sexes terminated copulations in equal frequencies but male-terminated copulations were significantly shorter in duration. Males were more likely to terminate copulation early with females they had previously mated with, however were less likely to do so if the female had recently mated with a different male. Among male-terminated copulations, males mated for longer with females that had previously mated with other males in the trial. Male-male mounts were as common as male-female mounts, suggesting that male H. maculosa are not able to discriminate the sex of conspecifics. These findings suggest male strategic allocation of spermatophores based female mating history is an important factor influencing mating behaviours of this species.ADDITIONAL KEYWORDS: mate choice -Octopus -operational sex ratio -sperm competition.

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Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Nocturnal mating behaviour and dynamic male investment of copulation time in the southern blue-ringed octopus, Hapalochlaena maculosa (Cephalopoda: Octopodidae)

Morse

Zenger

McCormick

et al. 2015

Behav

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“…Data on ejaculate competition between males are unavailable for H. apicalis. However, the above assumption is supported by a large amount of comparative data from insect studies showing that the last male to mate with a female fertilizes most of the eggs she lays between matings (see Parker, 1970). This interpretation of the selective history of nuptial feeding explains not only why males employ nuptial feeding, but also why they use large prey as nuptial offerings.…”

Section: Apicalis)mentioning

confidence: 75%

MATE CHOICE IN HYLOBITTACUS APICALIS (INSECTA: MECOPTERA) AND ITS RELATION TO SOME MODELS OF FEMALE CHOICE

Thornhill

1980

Evolution

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“…(1982) concluiram que o mesmo seja originário da coagulação do esperma do macho, desempenhando uma direta influência sobre o sucesso reprodutivo da espécie. Plugs copulatórios já foram registrados numa variedade de taxa, incluindo insetos (PARKER, 1970), ofídios (DEVINE, 1975), marsupiais (HARTMANN, 1924), insectívoros (EADIE, 1948), primatas (TINKLEPAUGH, 1930) e roedores (HARTUNG & DEWSBURY, 1978;BAUMGARDNER el 01.,1982;PEREIRA, 1982;DEWSBURY, 1988 dentre outros autores). Durante a Fase I, sempre que constatado, as fêmeas com plug foram consideradas grávidas, em início de gestação.…”

Section: Methodsunclassified

Ecologia de pequenos mamíferos silvestres da Mata Atlântica, Brasil: I. ciclos reprodutivos de Akodon cursor, Nectomys squamipes e Oryzomys nigripes (Rodentia, Cricetinae)

Pereira

Chagas²,

Costa³

1993

Rev. Bras. Zool.

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ABSTRACT. ECOLOGY OF SMALL MAMMALS FROM OE ATLANTIC FOREST, BRASIL. I. REPROOUTIVE CYCLE OF AKODON CURSOR, NECTOMYS SQUAMIPES ANO ORYZOMYS NIGRIPES (ROOENTIA, CRICETINAE). ln this work are determined lhe productive periods and the number of fixed embl)'os/pregnancy in the species of non-nying small mammals in four different stages of regeneration of the Atlantic Forest in Silva Jardim and Casimiro de Abreu (Rio de Janeiro). Akodon cursor, Nectornys squarnipes and Oryzornys nigripes showed repeated oestrus in ali seasons. To A. cursor the average number in ten parturitions was of 3.6 youngs; in six parturitions N. squarnipes and O. nigripes it was of 3.5 and 4.0youngs, respectively. ln these three species, the embl)'os fixed rather in the right horn of the uterus. KEY WORDS. Rodentia, Cricetinae, Atlantic forest , ecologyAs informações disponíveis sobre a biologia reprodutiva, da quase totalidade das espécies neotropicais de pequenos mamíferos não-voadores (adultos com peso < 2kg), são escassas até o presente.De alto significado ecológico, a biologia reprodutiva reveste-se de particular importância na Mata Atlântica, onde extensas áreas vem sendo continuamente devastadas, encontrando-se espécies, em inúmeros casos, taxonomicamente controvertidas ou mesmo ainda não descritas.Com animais iniciais provenientes de outras formações vegetais brasileiras, alguns autores abordaram a ontogenia pós-natal e reprodutiva de algumas espécies sob condições de laboratório. Desses estudos, desenvolvidos em co lônias já normalizadas, destacam-se os trabalhos de: JUSTINES & JOHNSON (1969) e MELO (1978a) em Calomys cal/osus; (1978b) em Oryzomys nigripes (= eliurns); LACHER (1979) em Kerodol1 nlpeslris; MELO & CAVALCANTI (1982) em Bolomys lasiurns( = Zygodontomys); e VILLELA & ALHO (1983) em Oryzomys subj7avus.

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Sperm Competition and Its Evolutionary Consequences in the Insects

Cited by 3,230 publications

References 106 publications

Nocturnal mating behaviour and dynamic male investment of copulation time in the southern blue-ringed octopus, Hapalochlaena maculosa (Cephalopoda: Octopodidae)

Nocturnal mating behaviour and dynamic male investment of copulation time in the southern blue-ringed octopus, Hapalochlaena maculosa (Cephalopoda: Octopodidae)

MATE CHOICE IN HYLOBITTACUS APICALIS (INSECTA: MECOPTERA) AND ITS RELATION TO SOME MODELS OF FEMALE CHOICE

Ecologia de pequenos mamíferos silvestres da Mata Atlântica, Brasil: I. ciclos reprodutivos de Akodon cursor, Nectomys squamipes e Oryzomys nigripes (Rodentia, Cricetinae)

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