NDLI: Effect of bêche-de-mer fishing on densities and size structure of Holothuria nobilis (Echinodermata: Holothuroidea) populations on the Great Barrier Reef

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Effect of bêche-de-mer fishing on densities and size structure of Holothuria nobilis (Echinodermata: Holothuroidea) populations on the Great Barrier Reef

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Coral Reefs : Volume 19, Issue 2, July 2000

Coral Reefs : Volume 19, Issue 1, April 2000

Coral Reefs : Volume 18

Coral Reefs : Volume 17

Coral Reefs : Volume 16

Effect of bêche-de-mer fishing on densities and size structure of Holothuria nobilis (Echinodermata: Holothuroidea) populations on the Great Barrier Reef

Content Provider	Springer Nature Link
Author	Uthicke, S. Benzie, J.
Copyright Year	2000
Abstract	Decreasing catch rates for Holothuria nobilis (black teatfish) on the Great Barrier Reef (GBR) prompted management agencies to close the fishery for this species in October 1999. At the same time, we surveyed densities and size structure of H. nobilis populations in the main area fished on the GBR. Densities of H. nobilis on four reefs protected from fishing (approximately 20 ind. ha–1) were about four times higher than those on 16 reefs open to fishing (approximately 5 ind. ha–1). Each of four other reefs had been divided into an area protected from fishing and an open area. On the largest of these reefs (ca. 28 km long), densities of H. nobilis were nearly five times higher in the protected area compared to the area open to fishing. On three smaller reefs (<11 km long), however, densities were not significantly different between the open and protected area, and were similar to that on reefs completely open to fishing. The average weight of individuals was significantly reduced on fished reefs (1,763 g) compared to closed reefs (2,200 g). Thus, bêche-de-mer fishing led to a strong reduction of density and biomass of H. nobilis. The division of smaller reefs into open and closed zones appears not to provide sufficient protection, but reefs that are completely closed to fishing appear to provide some degree of protection. There were some indications that proximity to tourist attractions may enhance the effect of protection.
Starting Page	271
Ending Page	276
Page Count	6
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	19
Issue Number	3
e-ISSN	14320975
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-11-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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Effect of bêche-de-mer fishing on densities and size structure of Holothuria nobilis (Echinodermata: Holothuroidea) populations on the Great Barrier Reef

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