Electrophoresis of the male accessory secretion and its fate in the mated female

Terranova, Andrew C.; Leopold, Roger A.; Degrugillier, Maurice E.; Johnson, James R.

doi:10.1016/0022-1910(72)90235-1

Cited by 31 publications

(6 citation statements)

References 26 publications

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“…As the sperm tail of the land Isopods is essentially of a proteic nature, it seems logical and consequential to attribute to this activity only a trophic finality that is a further example of a way of transferring from the male to the female, by means of mating, of a large quantity of nutritive substances supporting its reproductive activity, as found in many insect species (Leopold et al 1971;Terranova et al 1972;Leopold, 1976).…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure of seminal receptacle and sperm storage inArmadillidium granulatumBrandt (Isopoda: Oniscidea)

Longo¹,

Trovato²

2008

Italian Journal of Zoology

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The aim of this study was to evaluate the efficacy of sperm storage in the seminal receptacle in females of Armadillidium granulatum after the first mating and in the absence of further mating. Females of A. granulatum were bred in the laboratory, isolated from males, until they were sexually mature, and then they were allowed to mate. They were then isolated again from the males and observed to evaluate their reproductive behaviour until their natural death. Some females were sacrificed at various time intervals to carry out ultrastructural observations of the seminal receptacle and of the spermatozoa inside. All the females had the first brood at about 20 days after mating; a little less than 50% of the females had a second brood during the first reproductive season; only 10% of the females had another brood during the second reproductive season. The average number of juveniles produced by each female was about 25 at the first brood, but fall with the successive broods; the sex ratio of juveniles was about 1 male : 4 females. The ultrastructural observations showed some variations in the seminal receptacle wall over time with respect to reproductive activity while there was no appreciable modification as regards the spermatozoa present in the organ, the number of which progressively decreased during the period of reproductive activity.

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Section: Discussionmentioning

confidence: 99%

Ultrastructure of seminal receptacle and sperm storage inArmadillidium granulatumBrandt (Isopoda: Oniscidea)

Longo¹,

Trovato²

2008

Italian Journal of Zoology

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“…In theory, positive effects on female reproduction of seminal substances may be nutritional or hormonal (Karlsson 1998; Stjernholm & Karlsson 2000). Although the distinction between these two effects is non‐trivial (Eberhard 1996; Vahed 1998), the fact that female house flies that received a reduced amount of seminal substances exhibited a reduced daily fecundity as well as a shorter lifespan suggests that some of the products of the chemically complex ejaculate of this species (Terranova et al. 1972) indeed have a nutritional effect in females.…”

Section: Discussionmentioning

confidence: 99%

“…1971a,b). These proteins and peptides (Terranova et al. 1972) have a dose‐dependent effect on female physiology and reproductive behavior (Riemann & Thorson 1969).…”

Section: Methodsmentioning

confidence: 99%

The Effects of Experimentally Induced Polyandry on Female Reproduction in a Monandrous Mating System

Arnqvist

Andrés

2006

Ethology

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Females of most insect species maximize their fitness by mating more than once. Yet, some taxa are monandrous and there are two distinct scenarios for the maintenance of monandry. While males should always benefit from inducing permanent non‐receptivity to further mating in their mate, this is not necessarily true for females. Since females benefit from remating in many species, cases of monandry may reflect successful male manipulation of female remating (i.e. sexual conflict). Alternatively, monandry may favor both mates, if females maximize their fitness by mating only once in their life. These two hypotheses for the maintenance of monandry make contrasting predictions with regards to the effects of remating on female fitness. Here, we present an experimental test of the above hypotheses, using the monandrous housefly (Musca domestica) as a model system. Our results showed that accessory seminal fluid substances that males transfer to females during copulation have a dual effect: they trigger female non‐receptivity but also seem to have a nutritional effect that could potentially enhance female fitness. These results suggest that monandry is maintained in house flies despite potential benefits that females would gain by mating multiply.

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“…It has been shown that the ejaculate of many taxa contains a wide range of substances with putative e¡ects on females, mostly in the form of various proteins and peptides (Chen 1984;Eberhard & Cordero 1995;Eberhard 1996). For example, the ejaculate of the house£y is known to contain at least 12 di¡erent proteins, which have multiple target sites within the female (Terranova et al 1972). In theory, male Âfemale interactions could be due to any of three di¡erent associations.…”

Section: Discussionmentioning

confidence: 99%

Genetic divergence of the seminal signal—receptor system in houseflies: the footprints of sexually antagonistic coevolution?

Andrés

Arnqvist

2001

Proc. R. Soc. Lond. B

101

137

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To understand fully the significance of cryptic female choice, we need to focus on each of those postmating processes in females which create variance in fitness among males. Earlier studies have focused almost exclusively on the proportion of a female's eggs fertilized by different males (sperm precedence). Yet, variance in male postmating reproductive success may also arise from differences in ability to stimulate female oviposition and to delay female remating. Here, we present a series of reciprocal mating experiments among genetically differentiated wild-type strains of the housefly Musca domestica. We compared the effects of male and female genotype on oviposition and remating by females. The genotype of each sex affected both female oviposition and remating rates, demonstrating that the signal-receptor system involved has indeed diverged among these strains. Further, there was a significant interaction between the effects of male and female genotype on oviposition rate. We discuss ways in which the pattern of such interactions provides insights into the coevolutionary mechanism involved. Females in our experiments generally exhibited the weakest, rather than the strongest, response to males with which they are coevolved. These results support the hypothesis that coevolution of male seminal signals and female receptors is sexually antagonistic.

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Electrophoresis of the male accessory secretion and its fate in the mated female

Cited by 31 publications

References 26 publications

Ultrastructure of seminal receptacle and sperm storage inArmadillidium granulatumBrandt (Isopoda: Oniscidea)

Ultrastructure of seminal receptacle and sperm storage inArmadillidium granulatumBrandt (Isopoda: Oniscidea)

The Effects of Experimentally Induced Polyandry on Female Reproduction in a Monandrous Mating System

Genetic divergence of the seminal signal—receptor system in houseflies: the footprints of sexually antagonistic coevolution?

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