Ultrastructural observations on sperm storage in the ovary of the platyfish,
            <i>Xiphophorus maculatus</i>
            (Teleostei: Poeciliidae): The role of the duct epithelium

Potter, Hugh; Kramer, Charles R.

doi:10.1002/1097-4687(200008)245:2<110::aid-jmor3>3.0.co;2-#

Cited by 41 publications

(33 citation statements)

References 42 publications

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“…This particular orientation of the spermatozoa could indicate that the internal ovarian tissue nourishes the spermatozoa to keep them viable. For example, in X. maculatus , the cells of the ovarian tissue that interact with spermatozoa exhibit abundant ribosomes, microvilli, appendices, and desmosomes, which are characteristics of cells that transport nutrients (Potter & Kramer, ). The blood vessels that we observed surrounding the spermathecae may also contribute nutrients to the spermatozoa stored within.…”

Section: Discussionmentioning

confidence: 99%

Morphological structures for potential sperm storage in poeciliid fishes. Does superfetation matter?

Olivera-Tlahuel

Cruz

Moreno‐Mendoza

et al. 2017

Journal of Morphology

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Sperm storage within the female reproductive tract has been reported as a reproductive strategy in several species of vertebrates and invertebrates. However, the morphological structures that allow for sperm to be stored and kept viable for long periods are relatively unknown in osteichthyes. We use histological and stereological tools to identify and quantify sperm storage structures (spermathecae) in 12 species of viviparous Poeciliidae. We found spermathecae in nine species, six of which exhibit superfetation (the ability of females to simultaneously carry within the ovary two or more broods of embryos at different stages of development). These spermathecae are folds of ovarian tissue that close around spermatozoa. We compared the number and size (volume) of spermathecae between species with and without superfetation. Species that exhibit superfetation had a significantly higher number of spermathecae than species that do not exhibit this reproductive strategy. In addition, we found that the mean volume of spermathecae and total volume of spermathecae present in the ovary are marginally higher in species with superfetation. Our results contribute to the understanding of the morphological structures that allow for sperm storage in viviparous osteichthyes and suggest a positive relationship between superfetation and the capacity of females to store sperm.

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Section: Discussionmentioning

confidence: 99%

Morphological structures for potential sperm storage in poeciliid fishes. Does superfetation matter?

Olivera-Tlahuel

Cruz

Moreno‐Mendoza

et al. 2017

Journal of Morphology

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“…In both examples, however, sperm remain active during FSS whereas in guppies, as well as in other species with prolonged FSS (Orr and Zuk ), female‐stored sperm are immotile and are thought to be nourished by the female (Greven ). In guppies, female stored sperm are associated with specific epithelial cells (SACs) lining the oviduct, either within deep surface pits and pockets (synaptic knob‐shaped micropockets), or incorporated within the cytoplasm of the SACs (Potter and Kramer ; Kobayashi and Iwamatsu ). Therefore, sperm velocity should not affect the persistence of sperm within guppy female storage organs.…”

Section: Discussionmentioning

confidence: 99%

Directional postcopulatory sexual selection is associated with female sperm storage in Trinidadian guppies

et al. 2016

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Female sperm storage (FSS) is taxonomically widespread and often associated with intense sperm competition, yet its consequences on postcopulatory sexual selection (PCSS) are poorly known. Theory predicts that FSS will reduce the strength of PCSS, because sperm characteristics favored before and after FSS may be traded‐off, and opportunities for nondirectional PCSS should increase. We explored these questions in the guppy (Poecilia reticulata), by allowing females to mate multiply and by comparing the paternity pattern in two successive broods. Contrary to predictions, the variance in male fertilization success increased after FSS, driven by a change in male paternity share across broods. This change was positively associated with sperm velocity (measured before FSS) but not with the duration of FSS, indirectly suggesting that faster sperm were better in entering female storage organs, rather than in persisting within them. Other male traits, such as male size and orange color, heterozygosity, and relatedness to the female, did not influence paternity after FSS. These results indicate that processes associated with FSS tend to reinforce the strength of PCSS in guppies, rather than weaken it. Further work is necessary to test whether this pattern changes in case of more prolonged FSS.

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“…Oocyte maturation subsequently occurs within the follicle. Ovulation does not occur as intrafollicular gestation of the embryo follows fertilization, retaining the fertilized egg and then the embryo in the follicle, which is a special trait of poeciliids (Turner, ; Wourms, ; Wourms et al, ; Potter and Kramer, ; Koya, ). Subsequently, the embryo develops within the follicle in a characteristic intrafollicular gestation.…”

Section: Discussionmentioning

confidence: 99%

The occurrence of spermatozoa in the ovary of the gynogenetic viviparous teleost Poeciliaformosa (POECILIIDAE)

Uribe

Grier

Rosa-Cruz

et al. 2015

Journal of Morphology

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The reproductive mode of the female viviparous teleost Poecilia formosa (Poeciliidae) represents the phenomenon known as gynogenesis; that is, parthenogenetic development is initiated by spermatozoa which are needed for physiological activation of the egg and the initiation of gestation, but spermatozoa are prevented from contributing to the genome of the embryo. For the reason that no previous histological analyses of the ovary of this species during the reproductive cycle has been published the present study has been conducted. This study examined the histology of the ovary of P. formosa during nongestation and gestation phases and identified the presence of spermatozoa inside the ovary. Spermatozoa were observed in folds of the ovarian epithelium of P. formosa during both the nongestation and gestation phases. Sperm storage as documented in this study is a very important trait for the gynogenetic viviparous fish P. formosa contributing to the understanding of this species reproduction.

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Ultrastructural observations on sperm storage in the ovary of the platyfish, Xiphophorus maculatus (Teleostei: Poeciliidae): The role of the duct epithelium

Cited by 41 publications

References 42 publications

Morphological structures for potential sperm storage in poeciliid fishes. Does superfetation matter?

Morphological structures for potential sperm storage in poeciliid fishes. Does superfetation matter?

Directional postcopulatory sexual selection is associated with female sperm storage in Trinidadian guppies

The occurrence of spermatozoa in the ovary of the gynogenetic viviparous teleost Poeciliaformosa (POECILIIDAE)

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