Temporal variation in the virgin biomass of the edible jellyfish, Catostylus mosaicus (Scyphozoa, Rhizostomeae)

Pitt, Kylie. A, and Kingsford, Michael J. (2003) Temporal variation in the virgin biomass of the edible jellyfish, Catostylus mosaicus (Scyphozoa, Rhizostomeae). Fisheries Research, 63 (3). pp. 303-313.

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Abstract

Temporal variation in the virgin biomass and abundance of a single stock of the edible jellyfish, Catostylus mosaicus (Scyphozoa, Rhizostomeae) was estimated at Lake Illawarra, a coastal lagoon in New South Wales, Australia. Density and biomass were estimated three times within 3 weeks during three survey periods: April 1997, October 1997 and May 1998. Density and biomass were estimated for two size classes: all medusae easily counted from a moving boat (i.e. medusae ≥50mm bell diameter (BD)) and those considered to be vulnerable to the fishery (≥200mm BD). Densities of medusae ≥50mm BD varied greatly between survey periods and between days within survey periods. Densities of medusae ≥200mm BD were similar between survey periods but varied within survey periods. The virgin biomass of medusae≥50mmBD ranged between 1831 t during April 1997 and 18,526 t during May 1998. The biomass of medusae that was vulnerable to the fishery varied between 207 t in May 1998 and 2865 t in April 1997.

Item ID: 6338
Item Type: Article (Research - C1)
ISSN: 1872-6763
Keywords: Catostylus mosaicus; jellyfish; Scyphozoa; temporal variation; virgin biomass
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Date Deposited: 22 Mar 2010 23:18
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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