Temporal variation in the virgin biomass of the edible jellyfish, Catostylus mosaicus (Scyphozoa, Rhizostomeae).
Author(s)
Pitt, KA
Kingsford, MJ
Griffith University Author(s)
Year published
2003
Metadata
Show full item recordAbstract
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 =50 mm bell diameter (BD)) and those considered to be vulnerable to the fishery (=200 mm BD). Densities of medusae =50 mm BD varied greatly between survey periods ...
View more >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 =50 mm bell diameter (BD)) and those considered to be vulnerable to the fishery (=200 mm BD). Densities of medusae =50 mm BD varied greatly between survey periods and between days within survey periods. Densities of medusae =200 mm BD were similar between survey periods but varied within survey periods. The virgin biomass of medusae =50 mm BD 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.
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View more >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 =50 mm bell diameter (BD)) and those considered to be vulnerable to the fishery (=200 mm BD). Densities of medusae =50 mm BD varied greatly between survey periods and between days within survey periods. Densities of medusae =200 mm BD were similar between survey periods but varied within survey periods. The virgin biomass of medusae =50 mm BD 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.
View less >
Journal Title
Fisheries Research
Volume
63
Publisher URI
Subject
Environmental Science and Management
Ecology
Fisheries Sciences