Sperm precedence in the dragonfly Erythemis simplicicollis

McVey, Margaret E.; Smittle, B. J.

doi:10.1016/0022-1910(84)90046-5

Cited by 55 publications

(32 citation statements)

References 15 publications

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“…For example, Waage (1979a) proved the existence of this phenomenon in the genus Calopteryx from a change in the sperm volume within the intra-genitalia of the female during copulation. Also, Fincke (1984) and McVey & Smittle (1984) confirmed this phenomenon by a cross experiement using normal and irradiated sterile males. In the male of M. pruinosa studied here, sperm displacement was not proved, but the possibility of th!s phenomenon was strongly suggested by the morphology of the genitalia of both sexes and the observation of two kinds of movement (perhaps for removal and placement of sperm) of the male abdomen at the time of copulation.…”

Section: 382supporting

confidence: 83%

Synchronization of reproductive period among the two male forms and female of the damselfly Mnais pruinosa selys (Zygoptera: Calopterygidae)

Nomakuchi

Higashi

Maeda

1988

Ecological Research

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Ecological parameters in a population of Mnaispruinosa were investigated in a mountain stream. In the study area, there were two forms of male with regard to wing color, the orange-winged male (esakii) and the hyaline-winged male (strigata), and only one female form with hyaline wings. Emergence of adults began in late April, and the flying season ended in late June. The time after emergence was spent in maturation, and the insects began to mate when they reached maturity. Longevity of adults was 17.6 days for esakii males, 18.4 days for strigata males and 21.9 days for females. There was little difference in emergence time, maturation period, survivorship curve and longevity among the two male forms and female. In other words, the period for reproductive activities was perfectly coincident among them. The factors influencing the synchronization of emergence were discussed.

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Section: 382supporting

confidence: 83%

Synchronization of reproductive period among the two male forms and female of the damselfly Mnais pruinosa selys (Zygoptera: Calopterygidae)

Nomakuchi

Higashi

Maeda

1988

Ecological Research

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“…In others, complete mixing takes some time (e.g. 1-2 days in the dragonfly Erythemis simplicollis, McVey and Smittle 1984;6-7 days in the damselfly Mnais pruinosa, Siva-Jothy and Tsubaki 1989). Typically, P2 starts high initially and then declines (see also Schlager 1960).…”

Section: The Assumption Of Random Mixing In the Fertilization Setmentioning

confidence: 99%

Analysing sperm competition data: simple models for predicting mechanisms

Parker

Simmons

Kirk

1990

Behav Ecol Sociobiol

188

191

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Prospective models are developed for analysing sperm competition data so as to predict the underlying mechanisms determining paternity in multiply mated females. The models require: 1) estimations of proportion of offspring sired by the last male to mate (P2), 2) knowledge of the number of sperm transferred by each male, and 3) knowledge of the sperm storage capacity of the female, should this be limited. They will distinguish between "raffles" (sperm mixing without displacement) and sperm displacement mechanisms. The sensitivity of the techniques can be increased by manipulating the number of sperm transferred by each male. Typically, this can be done by manipulating copula duration or number of ejaculations, given a knowledge of the rate of sperm transfer. Data from two contrasting insect species are fitted to the models to demonstrate the techniques. These models are prospective only, and their limitations are discussed. The principal limitation is that we assume that sperm used for fertilization mix randomly in a "fertilization set" immediately prior to fertilization; in reality this may be difficult to identify. When sperm mixing is very rapid, the fertilization set will often be equivalent to the sperm stores, but with slow mixing, the fertilization set may be equivalent to a much more restricted zone and may change with time.

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“…A second problem involves females that did not mate immediately prior to oviposition; such cases involved 13.9% of ovipositions. Sperm precedence by the last male to mate drops considerably on subsequent days (McVey and Smittle, 1984). Combined with the low proportion of marked females in our study, this means that paternity of eggs laid by lone females could not be determined.…”

Section: Methodsmentioning

confidence: 78%

LIFETIME REPRODUCTIVE SUCCESS, SELECTION, AND THE OPPORTUNITY FOR SELECTION IN THE WHITE-TAILED SKIMMERPLATHEMIS LYDIA(ODONATA: LIBELLULIDAE)

Koenig

Albano

1987

Evolution

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Abstract. -We present estimates of lifetime reproductive success in Plathemis lydia, a territorial dragonfly. We partition the opportunity for selection into multiplicative episodes using the techniques of Arnold and Wade (I 984a, 1984b) and measure selection on several morphological and behavioral characters. For both sexes, variance in survivorship was the largest contribution to variance in lifetime reproductive success. Covariance effects are also strong for both sexes, suggesting considerable non-independence of episodes. Opportunity for selection calculated on a daily basis did not approximate analogous values determined from lifetime reproductive success.Phenotypic characters for which we investigated selection included body mass, hind wing length, first date of reproduction, and (for males) an index of territorial aggressiveness. We failed to find any significant direct targets of selection in either males or females. However, the combined effects of direct and indirect selection on early reproduction were significant for males, acting primarily through increased survivorship and increased time per day spent at the pond. Similarly, females present earlier in the season had shorter interclutch intervals. Partitioning of selection acting on male hind wing length and on aggressiveness reveals relationships between selective episodes, possibly indicative of phenotypic trade-offs between natural and sexual selection through malemale competition for females.Division of selection into episodes is a useful technique for identifying the source of selection. However, ordering effects can bias results, except when episodes occur in strictly chronological sequence. We present a method for circumventing this difficulty.

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Sperm precedence in the dragonfly Erythemis simplicicollis

Cited by 55 publications

References 15 publications

Synchronization of reproductive period among the two male forms and female of the damselfly Mnais pruinosa selys (Zygoptera: Calopterygidae)

Synchronization of reproductive period among the two male forms and female of the damselfly Mnais pruinosa selys (Zygoptera: Calopterygidae)

Analysing sperm competition data: simple models for predicting mechanisms

LIFETIME REPRODUCTIVE SUCCESS, SELECTION, AND THE OPPORTUNITY FOR SELECTION IN THE WHITE-TAILED SKIMMERPLATHEMIS LYDIA(ODONATA: LIBELLULIDAE)

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