Microtubular structures associated with the acrosome during spermiogenesis in the water-strider, Gerris remigis (say)

Tandler, Bernard; Moriber, Louis G.

doi:10.1016/s0022-5320(66)80056-4

Cited by 54 publications

(21 citation statements)

References 36 publications

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“…The internal tubular arrangement of the acrosomal content of E. heros was observed both in the firststages of development and in the mature sperm. This in analogy to what was observed in mature acrosome of the waterstrider Gerris (Tandler & Moriber, 1966;Werner & Werner, 1993), and the milkweed bug Oncopeltus (Barker & Riess, 1966), A. aseadum and N. viridula (Fernandes & Báo, 1999). Such paracrystalline material, however, is not present in the mature acrosome of Leptocoris (Itaya et al, 1980) and Notonecta .…”

Section: Figs 8 Andsupporting

confidence: 73%

Nuclear changes and acrosome formation during spermiogenesis in Euchistus heros (Hemiptera: Pentatomidae)

et al. 2001

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Section: Figs 8 Andsupporting

confidence: 73%

Nuclear changes and acrosome formation during spermiogenesis in Euchistus heros (Hemiptera: Pentatomidae)

et al. 2001

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“…We then examined the gynatrial complex under a Nikon (Tokyo, Japan) Optishot microscope equipped with differential interference contrast optics and searched for sperm in the gynatrial sac, vermiform appendix, and spermathecal tube. In A. remigis, individual sperm are 5 mm long (Pollister 1930;Tandler and Moriber 1966), and they are transferred in a coherent coiled mass (Campbell and Fairbairn 2001). We were unable to untangle this mass sufficiently to produce a uniform solution of sperm for direct counts (e.g., Smith et al 1988;Ward 1993).…”

Section: Experiments 1: Effect Of Irradiation On Male Behaviormentioning

confidence: 99%

How Well Do Mating Frequency and Duration Predict Paternity Success in the Polygynandrous Water Strider Aquarius Remigis?

Vermette

Fairbairn

2002

Evolution

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The relationship between mating success and paternity success is a key component of sexual selection but has seldom been estimated for species in which both sexes mate with many partners (polygynandry). We used a modification of Parker's sterile male technique to measure this relationship for the water strider Aquarius remigis in 47 laboratory populations simulating natural conditions of polygynandry. We also tested the hypothesis that prolonged copulation, a characteristic of this species, enhances paternity success. Mating behavior and paternity success were assayed for four days while males and females freely interacted. Paternity success was also assayed for an additional 7 days when females were isolated from males. Mating success significantly predicted paternity success and accounted for < or = 36% of the variance. Copulation duration was negatively related to both mating success and paternity success and did not explain any of the residual variance in paternity success. Thus, we found no evidence that prolonged copulation functions as a paternity assurance strategy in this species. Comparisons of sterile and fertile males suggested that paternity success is directly influenced by the quantity of sperm transferred. Our results support previous studies that have used mating success to estimate sexual selection, but also highlight the potential importance of sperm competition and other postinsemination processes.

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“…can hold only one spermatozoon at one time.) The sperm of A. remigis are ≥5 mm long (Jamieson 1987), and are unusual in having a long (2.5 mm), relatively rigid anterior acrosome (Pollister 1930;Tandler and Moriber 1966). This length and relative rigidity would seem to preclude passage through the tightly winding distal portion of the fecundation canal.…”

Section: Discussionmentioning

confidence: 99%

Prolonged copulation and the internal dynamics of sperm transfer in the water strider <i>Aquarius remigis</i>

Campbell¹,

Fairbairn²

2001

Can. J. Zool.

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Copulations lasting much longer than required to effect insemination are common throughout the Insecta, but their adaptive significance remains obscure. We address the hypothesis that prolonged copulations benefit male Aquarius remigis (Hemiptera, Gerridae) by influencing sperm use and storage following insemination. We describe the gynatrial complex of females and document sperm location immediately following 32 naturally terminated and 25 artificially terminated copulations. We also examine sperm storage in 22 females isolated from males for 2-10 days. Our results demonstrate that insemination occurs at the end of copulation, and therefore that prolonged copulation is not a post-insemination mate-guarding tactic, as was previously assumed. Sperm are transferred in a coherent, coiled mass and move rapidly to the spermathecal tube, the primary storage organ. However, a few sperm move directly to the fecundation canal and hence should be capable of immediate fertilization. Prolonged copulation is associated with increased filling of the spermathecal tube, which may indicate some form of copulatory courtship or sperm loading by males during the prolonged pre-insemination phase. We discuss this new interpretation of prolonged copulation in A. remigis in the context of the overall costs and benefits of prolonged copulation for both sexes under the natural conditions of polygynandry.Résumé : Les accouplements qui durent beaucoup plus longtemps qu'il ne faut pour assurer l'insémination sont fré-quents chez tous les insectes, mais leur importance adaptative demeure incertaine. Nous examinons ici l'hypothèse selon laquelle un accouplement prolongé comporte des bénéfices pour les mâles d'Aquarius remigis (Hemiptera, Gerridae) en influençant l'utilisation et la mise en réserve des spermatozoïdes après l'insémination. Nous décrivons le complexe gynatrial de la femelle. Nous avons localisé les spermatozoïdes immédiatement après la fin de la copulation naturelle chez 32 femelles et de la copulation interrompue artificiellement chez 25 autres. Nous avons également examiné le réserves de spermatozoïdes chez 22 femelles isolées des mâles depuis 2-10 jours. Nos résultats démontrent que l'insémination se fait à la fin de l'accouplement et donc que la prolongation de l'accouplement n'est pas une tactique pour garder le contrôle de la femelle après l'insémination comme on le croyait auparavant. Les spermatozoïdes sont transmis en une masse cohérente en serpentin qui atteint rapidement le canal de la spermathèque, principal réservoir des spermatozoïdes. Cependant, quelques spermatozoïdes gagnent directement le canal de fécondation et devraient donc être en mesure d'assurer une fécondation immédiate. L'accouplement prolongé est associé au remplissage progressif de la spermathèque, ce qui reflète probablement l'existence d'un comportement de cour pendant la copulation ou le chargement des spermatozoïdes par les mâles au cours de la phase pré-inséminatoire prolongée. Nous examinons cette nouvelle interprétation de l'accouplement prolong...

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Microtubular structures associated with the acrosome during spermiogenesis in the water-strider, Gerris remigis (say)

Cited by 54 publications

References 36 publications

Nuclear changes and acrosome formation during spermiogenesis in Euchistus heros (Hemiptera: Pentatomidae)

Nuclear changes and acrosome formation during spermiogenesis in Euchistus heros (Hemiptera: Pentatomidae)

How Well Do Mating Frequency and Duration Predict Paternity Success in the Polygynandrous Water Strider Aquarius Remigis?

Prolonged copulation and the internal dynamics of sperm transfer in the water strider <i>Aquarius remigis</i>

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