Distribution and abundance of two juvenile tropical Photololigo species (Cephalopoda: Loliginidae) in the central Great Barrier Reef Lagoon

Moltschaniwskyj, Natalie A., and Doherty, Peter J. (1994) Distribution and abundance of two juvenile tropical Photololigo species (Cephalopoda: Loliginidae) in the central Great Barrier Reef Lagoon. Fishery Bulletin, 92 (2). pp. 302-312.

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Abstract

This study quantified the temporal and spatial abundance of juveniles of two Photololigo species on the continental shelf off Townsville, Australia with the use of light-traps. The two Photololigo species (A and B) showed very distinct and separate spatial distribution patterns. Photololigo sp. A was found close to the coast and was the smaller and more abundant of the two species. This species was most abundant in surface waters, although larger individuals were generally caught deeper. There was no evidence of vertical movements during the night. The presence of small and large juvenile Photololigo sp. A during summer and winter months suggests spawning and recruitment occur throughout the year. In contrast, Photololigo sp. B was caught predominantly offshore. All sizes of Photololigo sp. B were caught both near the benthos and at the surface in the mid-lagoon, but farther offshore juveniles were deeper and larger. The presence of small juvenile squid of both species throughout the summer suggests that these species spawn for an extended period during the summer. This study demonstrates that light-traps are an effective way of sampling small cephalopods.

Item ID: 33913
Item Type: Article (Research - C1)
ISSN: 1937-4518
Additional Information:

Copyright law does not apply to Fishery Bulletin, which falls within the public domain. However, if an author reproduces any part of an article from Fishery Bulletin in his or her work, reference to source is considered correct form (e.g., Source: Fish. Bull. 97:105).

Funders: Fishing Industry and Research Development Council (FIRDC)
Projects and Grants: Merit Research Grant
Date Deposited: 11 Jul 2014 03:07
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060207 Population Ecology @ 30%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 70%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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