Daily cycle of release of sperm from the testes of the Mediterranean flour moth

Riemann, John G.; Thorson, Barbara J.; Ruud, Rita L.

doi:10.1016/0022-1910(74)90133-4

Cited by 73 publications

(26 citation statements)

References 10 publications

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“…However, in the case of both sperm types, the number of sperm in the spermatophore was larger than that in the spermatheca. The difference in sperm number between the spermatophore and the spermatheca could result from their use as egg nutrients (Riemann et al 1974) or for female body maintenance (Silberglied et al 1984), and it could also be caused by their own mortality (Yamagishi et al 1992). Even if as few as 1000 eupyrene spermatozoa are eventually stored in the spermatheca (about 10% of the eupyrene sperm transferred by male), the number would still be sufficient to fertilize all the eggs loaded in the female (Labine 1964).…”

Section: Discussionmentioning

confidence: 98%

“…Fänger and Naumann (1993) demonstrated that apyrene sperm encircled eupyrene sperm bundles in the testis. There is a simplified mode of bipartite distribution (apyrene sperm anterior and eupyrene sperm posterior) in the males of many lepidopteran insects (Riemann et al 1974); this asymmetrical distribution is useful in terms of the timing of transferring apyrene and eupyrene sperm bundles before the completion of copulation. However, in P. xuthus, there was little difference as regards the timing of the transfer of the two types of sperm during copulation.…”

Section: Discussionmentioning

confidence: 99%

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Eupyrene sperm migrates to spermatheca after apyrene sperm in the swallowtail butterfly, Papilio xuthus L. (Lepidoptera: Papilionidae)

Watanabe

Bon’no

Hachisuka

2000

Journal of Ethology

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When swallowtail butterflies, Papilio xuthus, are mated by the hand-pairing method, both types of sperm, eupyrene and apyrene sperm, are transferred from the male to the spermatheca via the spermatophore in the bursa copulatrix. This mechanism is demonstrated by two different kinds of experiments. The first set of experiments employed interrupted copulation, and the second set was examination of the sperm in the spermatophore and spermatheca after the termination of copulation. The sperm was transferred 30 min after the start of copulation. The eupyrene sperm was still in the bundle; the number of the bundles ranged from 9 to 108 (mean, 42.7; n ϭ 27). The bundles were gradually released after the completion of copulation, and the free eupyrene spermatozoa then remained in the spermatophore at least 2 h before migrating to the spermatheca. On the other hand, about 160 000 apyrene spermatozoa were transferred to the spermatophore and remained there for more than 1 h. We observed 11 000 apyrene spermatozoa in the spermatheca 12 h after the completion of copulation, but most of this type of sperm disappeared shortly thereafter. In contrast, the eupyrene sperm arrived in the spermatheca more than 1 day after the completion of copulation and remained there at least 1 week. Therefore, these findings suggest that apyrene sperm migrate from the spermatophore to the spermatheca earlier than eupyrene sperm. Accordingly, if females mated multiply, the time difference might avoid the mixing of sperm. In addition, the predominance of sperm from the last mating session may occur not in the bursa copulatrix but in the spermatheca.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Eupyrene sperm migrates to spermatheca after apyrene sperm in the swallowtail butterfly, Papilio xuthus L. (Lepidoptera: Papilionidae)

Watanabe

Bon’no

Hachisuka

2000

Journal of Ethology

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“…Sperm is retained in the UVD overnight and in the morning is transferred from the UVD to the seminal vesicles (SV). Such rhythms were reported in several species from different lepidopteran families (Riemann et al, 1974;Giebultowicz et al, 1988;Giebultowicz and Brooks, 1998;Bebas et al, 2001;Seth et al, 2002). Studies in Lymantria dispar and later in S. littoralis demonstrated that the rhythm of sperm release is self-sustained in constant darkness and can be entrained by light in vivo and in isolated testis-vas complexes reared in vitro (Giebultowicz et al,1989;Bebas et al, 2001).…”

Section: Introductionmentioning

confidence: 93%

Diurnal rhythm in expression and release of yolk protein in the testis of Spodoptera littoralis (Lepidoptera: Noctuidae)

Kotwica

Joachimiak

Polańska

et al. 2011

Insect Biochemistry and Molecular Biology

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“…Several days before adult eclosion, sperm bundles begin to descend from the testis into the UVD. In all species of moths so far investigated, the release of sperm does not occur continually, but is precisely timed and follows a daily rhythm (Riemann et al, 1974;Giebultowicz et al, 1988Giebultowicz et al, , 1992. Periodic release of sperm appears to be essential for post-testicular maturation of spermatozoa; secretory material that is released from the UVD epithelium at the time when sperm enters the UVD lumen is subsequently incorporated into sperm bundles Giebultowicz, 1991, 1992).…”

mentioning

confidence: 98%

Ontogeny of the Circadian System Controlling Release of Sperm from the Insect Testis

Giebułtowicz

Joy

1992

J Biol Rhythms

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In the gypsy moth, the release of sperm bundles from the testis into the vas deferens is rhythmic and is controlled by a circadian pacemaker located in the reproductive system. However, in males kept since pupation in constant darkness (DD) and temperature, the release of sperm was arrhythmic. The release of sperm became rhythmic when males were transferred from a light-dark cycle (LD 16:8) to DD 6-7 days after pupation. To further investigate the development of the circadian system during the pupal stage, we exposed DD pupae to a single 8-hr pulse of light or 8-hr pulse of a 4 degrees C temperature increase on different days after pupation. The pattern of sperm release was determined 5-6 days after the pulse. Males that were exposed to light or temperature pulses 5 days after pupation subsequently showed nonrhythmic sperm release. However, about half of the pupae that received the pulse on day 6 and most of the pupae that received it on day 7 subsequently showed synchronized sperm release. These results suggested that the clock underlying rhythmic release of sperm becomes operational at approximately 6 days after pupation--that is, 2 days prior to initiation of rhythmic sperm release from the testis.

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Daily cycle of release of sperm from the testes of the Mediterranean flour moth

Cited by 73 publications

References 10 publications

Eupyrene sperm migrates to spermatheca after apyrene sperm in the swallowtail butterfly, Papilio xuthus L. (Lepidoptera: Papilionidae)

Eupyrene sperm migrates to spermatheca after apyrene sperm in the swallowtail butterfly, Papilio xuthus L. (Lepidoptera: Papilionidae)

Diurnal rhythm in expression and release of yolk protein in the testis of Spodoptera littoralis (Lepidoptera: Noctuidae)

Ontogeny of the Circadian System Controlling Release of Sperm from the Insect Testis

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