Sexual dimorphism and gonadal development of the Australian longfinned river eel

Walsh, CT; Pease, BC; Booth, DJ

Sexual dimorphism and gonadal development of the Australian longfinned river eel

Walsh, CT Pease, BC Booth, DJ

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Publication Type:: Journal Article
Citation:: Journal of Fish Biology, 2003, 63 (1), pp. 137 - 152
Issue Date:: 2003-07-01

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Field	Value	Language
dc.contributor.author	Walsh, CT	en_US
dc.contributor.author	Pease, BC	en_US
dc.contributor.author	Booth, DJ https://orcid.org/0000-0002-8256-1412	en_US
dc.date.issued	2003-07-01	en_US
dc.identifier.citation	Journal of Fish Biology, 2003, 63 (1), pp. 137 - 152	en_US
dc.identifier.issn	0022-1112	en_US
dc.identifier.uri	http://hdl.handle.net/10453/3885
dc.description.abstract	The sex and stage of gonadal development of longfinned river eels Anguilla reinhardtii, captured from nine river catchments in New South Wales, Australia, between 1999 and 2001, were determined macroscopically. Sex was verified by histology. Histology was also necessary, however, to accurately define stages of gonadal development, particularly in individuals <600 mm in total body length. Anguilla reinhardtii displayed asynchronous gamete development. The most advanced cells present in migrating male and female A. reinhardtii were spermatocytes and previtellogenic oocytes, respectively. Gonadal development stages were positively correlated with body size in both sexes. Females, however, were significantly larger than males and their gonads matured over a broader size range. Size at sexual differentiation (42-60cm for males and 50-76cm for females) was much larger than for most other anguillids that have been studied, with the exception of the New Zealand longfinned eel Anguilla dieffenbachii. Corresponding with its large range in size at sexual differentiation was a relatively large range in size at migration for both males (44-62cm) and females (74-142cm). © 2003 The Fisheries Society of the British Isles.	en_US
dc.relation.ispartof	Journal of Fish Biology	en_US
dc.relation.isbasedon	10.1046/j.1095-8649.2003.00136.x	en_US
dc.subject.classification	Fisheries	en_US
dc.title	Sexual dimorphism and gonadal development of the Australian longfinned river eel	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	63	en_US
utslib.for	0602 Ecology	en_US
utslib.for	0608 Zoology	en_US
utslib.for	0704 Fisheries Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	63	en_US

Abstract:

The sex and stage of gonadal development of longfinned river eels Anguilla reinhardtii, captured from nine river catchments in New South Wales, Australia, between 1999 and 2001, were determined macroscopically. Sex was verified by histology. Histology was also necessary, however, to accurately define stages of gonadal development, particularly in individuals <600 mm in total body length. Anguilla reinhardtii displayed asynchronous gamete development. The most advanced cells present in migrating male and female A. reinhardtii were spermatocytes and previtellogenic oocytes, respectively. Gonadal development stages were positively correlated with body size in both sexes. Females, however, were significantly larger than males and their gonads matured over a broader size range. Size at sexual differentiation (42-60cm for males and 50-76cm for females) was much larger than for most other anguillids that have been studied, with the exception of the New Zealand longfinned eel Anguilla dieffenbachii. Corresponding with its large range in size at sexual differentiation was a relatively large range in size at migration for both males (44-62cm) and females (74-142cm). © 2003 The Fisheries Society of the British Isles.

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http://hdl.handle.net/10453/3885