Survey of oviducal gland structure and function in elasmobranchs

Hamlett, William C.; Knight, David P.; Koob, Thomas J.; Jezior, M.; Luong, Thanh-Truc; Rozycki, T.; Brunette, N.; Hysell, Matthew

doi:10.1002/(sici)1097-010x(199811/12)282:4/5<399::aid-jez2>3.0.co;2-6

Cited by 63 publications

(130 citation statements)

References 41 publications

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“…From it, the most anterior region of the oviductal gland is the club zone. S. acuta shows here a strong reactivity to the Schiff reagent and the Alcian Blue dye, indicating the presence of acid mucins as occurs in S. canicula (Threadgold, 1957, Rusaouën, 1976Feng and Knight, 1992), in R. eglanteria, R. erinacea (Hamlett et al, 1998a), in C. millii (Smith et al, 2004) and in the guitarfish (Rhinobatus granulosus: Prasad, 1945;R. lentiginosus: Hamlett et al, 1998b).…”

Section: Discussionmentioning

confidence: 76%

“…S. acuta shows all the four zones in which the gland was subdivided according to their morphology and tintorial affinities. As occurs in Raja erinacea and R. eglanteria (Hamlett et al, 1998a), the gland of S. acuta expands their lateral borders before the arrival of the egg due, ( Figure 12). Finally the glands closest to the muscular layer are clearly serous.…”

Section: Oviducal Gland (Og)mentioning

confidence: 78%

“…As we look to the end of adenomers, their diameter increases progressively due to the increase of secretion. PAS and AB stains are negative (Table 1) es the oviducal gland produces not only the jellies that envelop the egg, but also the capsule with their ornamentation (Hamlett et al, 1998a). This structure has the same basic organization in all studied elasmobranchs but the relevance of each glandular region is correlated with the reproductive adaptations of the species (Hamlett, 2005).…”

Section: Oviducal Gland (Og)mentioning

confidence: 99%

“…In the entire group the ovaries produce large oocytes with considerable yolk supplies. As the fertilized egg passes down the oviduct it is encapsulated by secretions produced by the oviducal gland, which is a specialized region of the oviduct which transfers eggs to the uterus, produces egg jelly, forms the tertiary egg envelopes and stores sperm (Hamlett et al, 1998a;Hamlett and Koob, 1999). The gross morphology of the oviducal gland varies between species, but in general consists of two similar dorsoventral flattened halves surrounded by connective tissue (Knight et al, 1996) and their size changes with the reproductive cycle stage.…”

Section: Introductionmentioning

confidence: 99%

“…It can be divided into four different morphological zones based on the appearance of the lamellae in longitudinal view. From cranial to caudal, these regions are the club, papillary, baffle and terminal zones and they show different affinity for dyes according to their different functions (Hamlett et al, 1998a).…”

Section: Introductionmentioning

confidence: 99%

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Histological remarks of the oviduct and the oviducal gland of Sympterygia acuta Garman, 1877

Ej¹,

Estecondo²

2008

Braz. J. Biol.

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The elasmobranchs constitute an important resource in Argentinian fishing and they show reproductive characteristics that make them susceptible to the pressure of fishing. In spite of the importance of the resource our knowledge about the species of the Southwestern Atlantic is scarce. In this work we study the microanatomy of the oviduct and the oviducal gland of Sympterygia acuta. The results show a very folded oviduct with mucous and ciliated cells. The oviducal gland depicts the same zonation as other batoids, showing the typical four regions (club, papillary, baffle and terminal). The epithelium lining the glandular lumen is simple columnar with ciliated and glandular cells. The four zones show simple or ramified tubular gland the secretions of which constitute the egg's envelopes. The club and baffle zones are similar to those present in other species. The papillary one depicts a different pattern of secretions that other Rajiformes and the last zone of the gland is characterized by mixed adenomers. The information here exposed constitutes the first report on the microanatomy of the genital tract of S. acuta.Keywords: Elasmobrachs, oviducalgland, reproduction, Sympterygia acuta. Observações histológicas do oviduto e da glândula oviducal de Sympterygia acuta Garman, 1877 ResumoOs elasmobranchii constituem um importante recurso pesqueiro na Argentina e mostram características reprodutivas que os fazem suscetíveis à pressão de pesca. Apesar da importância do recurso, nosso conhecimento sobre as espécies do Atlântico do Sudoeste é escasso. Neste trabalho, estudamos a microanatomia do oviduto e da glândula oviducal de Sympterygia acuta. Os resultados mostram um oviduto muito dobrado, com células mucosas e células ciliadas. A glân-dula oviducal apresenta as mesmas zonas que outros batóideos, mostrando as quatro regiões típicas (club, papillary, baffle e terminal). O epitélio que reveste o lúmen glandular é simples, com células ciliadas e células glandulares. As quatro zonas mostram glândulas tubulares simples ou ramificadas e suas secreções constituem os envelopes do ovo. As zonas do club e baffle são semelhantes aquelas presentes em outras espécies. A papilar tem um padrão de secreção diferente de outros Rajiformes e a última zona da glândula é caracterizada por adenômeros mistos. A informação aqui exposta constitui o primeiro relato sobre a microanatomia do trato genital de S. acuta.Palavras-chave: Elasmobranchii, glândula oviducal, reprodução, Sympterygia acuta.

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Section: Discussionmentioning

confidence: 76%

Section: Oviducal Gland (Og)mentioning

confidence: 78%

Section: Oviducal Gland (Og)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Histological remarks of the oviduct and the oviducal gland of Sympterygia acuta Garman, 1877

Ej¹,

Estecondo²

2008

Braz. J. Biol.

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Reproductive endocrinology of female elasmobranchs: Lessons from the little skate (Raja erinacea) and spiny dogfish (Squalus acanthias)

Koob

Callard

1999

J. Exp. Zool.

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Conventional classification of reproductive modes in female elasmobranchs fails to account for the diversity in ovarian dynamics that operate during oviparous and viviparous cycles. Delineating this diversity is crucial for understanding the endocrine regulation of the manifold physiological mechanisms utilized to retain and protect eggs and developing embryos, to fuel embryogenesis, and to manage the intrauterine milieu. Oocyte development and follicular steroidogenesis overlap with egg retention and pregnancy in some species, whereas in others the follicular phase of the cycle is temporally separated from the gravid period. A luteal phase predominates the post‐ovulatory period in viviparous species. In oviparous species, the luteal phase overlaps with the follicular cycle. This heterogeneity in ovulatory cycles suggests that the endocrine system evolved a transmutable system for regulating steroidogenesis and the control of the reproductive events. The reproductive biology and endocrinology of the oviparous little skate and lecithotrophic viviparous spiny dogfish are reviewed in order to derive a working hypothesis that explains the complex nature of endocrine patterns observed in species utilizing disparate reproductive modes. An understanding of the adaptations in ovarian dynamics to particular ovulatory cycles is key to developing theories about the evolution of reproductive strategies in female elasmobranchs. J. Exp. Zool. 284:557–574, 1999. © 1999 Wiley‐Liss, Inc.

show abstract

Reproductive endocrinology of female elasmobranchs: Lessons from the little skate (Raja erinacea) and spiny dogfish (Squalus acanthias)

Koob

Callard

1999

J. Exp. Zool.

View full text Add to dashboard Cite

Conventional classification of reproductive modes in female elasmobranchs fails to account for the diversity in ovarian dynamics that operate during oviparous and viviparous cycles. Delineating this diversity is crucial for understanding the endocrine regulation of the manifold physiological mechanisms utilized to retain and protect eggs and developing embryos, to fuel embryogenesis, and to manage the intrauterine milieu. Oocyte development and follicular steroidogenesis overlap with egg retention and pregnancy in some species, whereas in others the follicular phase of the cycle is temporally separated from the gravid period. A luteal phase predominates the post-ovulatory period in viviparous species. In oviparous species, the luteal phase overlaps with the follicular cycle. This heterogeneity in ovulatory cycles suggests that the endocrine system evolved a transmutable system for regulating steroidogenesis and the control of the reproductive events. The reproductive biology and endocrinology of the oviparous little skate and lecithotrophic viviparous spiny dogfish are reviewed in order to derive a working hypothesis that explains the complex nature of endocrine patterns observed in species utilizing disparate reproductive modes. An understanding of the adaptations in ovarian dynamics to particular ovulatory cycles is key to developing theories about the evolution of reproductive strategies in female elasmobranchs. J. Exp. Zool. 284:557-574, 1999.

show abstract

Survey of oviducal gland structure and function in elasmobranchs

Cited by 63 publications

References 41 publications

Histological remarks of the oviduct and the oviducal gland of Sympterygia acuta Garman, 1877

Histological remarks of the oviduct and the oviducal gland of Sympterygia acuta Garman, 1877

Reproductive endocrinology of female elasmobranchs: Lessons from the little skate (Raja erinacea) and spiny dogfish (Squalus acanthias)

Reproductive endocrinology of female elasmobranchs: Lessons from the little skate (Raja erinacea) and spiny dogfish (Squalus acanthias)

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