Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.

Nautiloids are the subject of speculation as to their threatened status arising from the impacts of targeted fishing for the ornamental shell market. Life history knowledge is essential to understand the susceptibility of this group to overfishing and to the instigation of management frameworks. Thi...

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Autores principales:	Andrew J Dunstan, Peter D Ward, N Justin Marshall
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/279ff8fec3854d70841453228ac6a599
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spelling	oai:doaj.org-article:279ff8fec3854d70841453228ac6a5992021-11-18T06:58:57ZNautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.1932-620310.1371/journal.pone.0016312https://doaj.org/article/279ff8fec3854d70841453228ac6a5992011-02-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21347356/?tool=EBIhttps://doaj.org/toc/1932-6203Nautiloids are the subject of speculation as to their threatened status arising from the impacts of targeted fishing for the ornamental shell market. Life history knowledge is essential to understand the susceptibility of this group to overfishing and to the instigation of management frameworks. This study provides a comprehensive insight into the life of Nautilus in the wild. At Osprey Reef from 1998-2008, trapping for Nautilus was conducted on 354 occasions, with 2460 individuals of one species, Nautilus pompilius, captured and 247 individuals recaptured. Baited remote underwater video systems (BRUVS) were deployed on 15 occasions and six remotely operated vehicle (ROV) dives from 100-800 m were conducted to record Nautilus presence and behavior. Maturity, sex and size data were recorded, while measurements of recaptured individuals allowed estimation of growth rates to maturity, and longevity beyond maturity. We found sexual dimorphism in size at maturity (males: 131.9±SD = 2.6 mm; females: 118.9±7.5 mm shell diameter) in a population dominated by mature individuals (58%). Mean growth rates of 15 immature recaptured animals were 0.061±0.023 mm day(-1) resulting in an estimate of around 15.5 years to maturation. Recaptures of mature animals after five years provide evidence of a lifespan exceeding 20 years. Juvenile Nautilus pompilius feeding behavior was recorded for the first time within the same depth range (200-610 m) as adults. Our results provide strong evidence of a K-selected life history for Nautilus from a detailed study of a 'closed' wild population. In conjunction with population size and density estimates established for the Osprey Reef Nautilus, this work allows calculations for sustainable catch and provides mechanisms to extrapolate these findings to other extant nautiloid populations (Nautilus and Allonautilus spp.) throughout the Indo-Pacific.Andrew J DunstanPeter D WardN Justin MarshallPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 2, p e16312 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrew J Dunstan Peter D Ward N Justin Marshall Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.
description	Nautiloids are the subject of speculation as to their threatened status arising from the impacts of targeted fishing for the ornamental shell market. Life history knowledge is essential to understand the susceptibility of this group to overfishing and to the instigation of management frameworks. This study provides a comprehensive insight into the life of Nautilus in the wild. At Osprey Reef from 1998-2008, trapping for Nautilus was conducted on 354 occasions, with 2460 individuals of one species, Nautilus pompilius, captured and 247 individuals recaptured. Baited remote underwater video systems (BRUVS) were deployed on 15 occasions and six remotely operated vehicle (ROV) dives from 100-800 m were conducted to record Nautilus presence and behavior. Maturity, sex and size data were recorded, while measurements of recaptured individuals allowed estimation of growth rates to maturity, and longevity beyond maturity. We found sexual dimorphism in size at maturity (males: 131.9±SD = 2.6 mm; females: 118.9±7.5 mm shell diameter) in a population dominated by mature individuals (58%). Mean growth rates of 15 immature recaptured animals were 0.061±0.023 mm day(-1) resulting in an estimate of around 15.5 years to maturation. Recaptures of mature animals after five years provide evidence of a lifespan exceeding 20 years. Juvenile Nautilus pompilius feeding behavior was recorded for the first time within the same depth range (200-610 m) as adults. Our results provide strong evidence of a K-selected life history for Nautilus from a detailed study of a 'closed' wild population. In conjunction with population size and density estimates established for the Osprey Reef Nautilus, this work allows calculations for sustainable catch and provides mechanisms to extrapolate these findings to other extant nautiloid populations (Nautilus and Allonautilus spp.) throughout the Indo-Pacific.
format	article
author	Andrew J Dunstan Peter D Ward N Justin Marshall
author_facet	Andrew J Dunstan Peter D Ward N Justin Marshall
author_sort	Andrew J Dunstan
title	Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.
title_short	Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.
title_full	Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.
title_fullStr	Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.
title_full_unstemmed	Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.
title_sort	nautilus pompilius life history and demographics at the osprey reef seamount, coral sea, australia.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/279ff8fec3854d70841453228ac6a599
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Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia.

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