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dc.contributor.authorAwruch, Cynthia A
dc.contributor.authorPankhurst, Ned W
dc.contributor.authorFrusher, Stewart D
dc.contributor.authorStevens, John D
dc.date.accessioned2019-04-11T02:10:45Z
dc.date.available2019-04-11T02:10:45Z
dc.date.issued2008
dc.date.modified2012-02-09T22:35:48Z
dc.identifier.issn2471-5638
dc.identifier.doi10.1002/jez.445
dc.identifier.urihttp://hdl.handle.net/10072/23535
dc.description.abstractThis study examined the endocrine and reproductive correlates of reproduction in 636 female and 468 male draughtboard sharks (Cephaloscyllium laticeps) captured from southeastern Australia. Females were oviparous and displayed a single external‐type ovary with a maximum follicle diameter of 35 mm. Vitellogenesis commenced at a follicle diameter of 10 mm. Females showed a constant overlap between follicular recruitment, ovarian growth, and egg laying. The male reproductive tract consisted of paired testes with spermatocysts undergoing diametric development. Plasma levels of the presumptive gonadal steroids, testosterone (T), 17β‐estradiol (E2), progesterone (P4), and 11‐ketotestosterone (11‐KT; males only) were correlated with morphological developmental stages of the gonads. In females, E2 increased as the follicle developed before declining as the follicle reached maturity. T remained low during the first stages of ovarian growth and increased as the follicle reached maturity. P4 showed a peak just before ovulation. In males, T was the only hormone that varied with maturity, increasing in adults; E2 and P4 were present at low plasma concentrations in males and did not change with stage of gonadal development. 11‐KT was undetectable at all times. Endocrine changes in draughtboard sharks were consistent with hormonal correlates reported for other species and suggest roles for E2( in females) and T (in both sexes) in gametogenesis and P4 in maturational events in females. J. Exp. Zool. 309A:184–197, 2008. © 2008 Wiley‐Liss, Inc.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_US
dc.publisherWiley Interscience
dc.publisher.placePhiladelphia
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom184
dc.relation.ispartofpageto197
dc.relation.ispartofissue4
dc.relation.ispartofjournalJournal of Experimental Zoology. Part A: Ecological Genetics and Physiology
dc.relation.ispartofvolume309A
dc.rights.retentionY
dc.subject.fieldofresearchComparative Physiology
dc.subject.fieldofresearchcode060604
dc.titleEndocrine and Morphological Correlates of Reproduction in the Draughtboard Shark Cephaloscyllium laticeps (Elasmobranchii: Scyliorhinidae)
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2008
gro.hasfulltextNo Full Text
gro.griffith.authorPankhurst, Ned W.


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