Catch size and behaviour of pre-adults of three species of penaeid prawns as influenced by tidal current direction, trawl alignment, and day and night periods

Coles R.G. (1979) Catch size and behaviour of pre-adults of three species of penaeid prawns as influenced by tidal current direction, trawl alignment, and day and night periods. Journal of Experimental Marine Biology and Ecology, 38 3: 247-260. doi:10.1016/0022-0981(79)90070-4


Author Coles R.G.
Title Catch size and behaviour of pre-adults of three species of penaeid prawns as influenced by tidal current direction, trawl alignment, and day and night periods
Journal name Journal of Experimental Marine Biology and Ecology   Check publisher's open access policy
ISSN 0022-0981
Publication date 1979-05-07
Sub-type Article (original research)
DOI 10.1016/0022-0981(79)90070-4
Volume 38
Issue 3
Start page 247
End page 260
Total pages 14
Subject 1104 Complementary and Alternative Medicine
1105 Dentistry
2303 Ecology
Abstract Multivariate analyses of data from estuarine catches of postlarval and juvenile penaeids show differences between the three species. Significantly larger catches of Penaeus plebejus Hesse were recorded at night with the largest numbers in the 3.1-5 mm carapace length size class. Tidal current condition was not significant as a main effect for this species. Interaction with daytime and nighttime periods indicates that the nighttime flooding tide and slack-water catches were larger than daytime catches during any tidal current condition. Day and night catches of Metapenaeus bennettae Racek and Dall were similar. In contrast to P. plebejus, larger prawns were more numerous, the 11.1 + mm size class containing significantly larger numbers than other size classes. Tidal current condition was a significant effect. The largest catches were on night-time slack waters followed by those on daytime slack waters. Catches during ebbing and flooding currents were similar. Catches of Metapenaeus macleayi (Haswell) were significantly larger during the day. All six size classes contained similar numbers of prawns. Tidal current condition had a significant effect with daytime and nighttime catches at slack water being larger than catches at all other times. Alignment of trawl direction with the tidal current did not have a significant effect on catch size, either by itself or as an interactive factor for any of the three species. This is explained in terms of prawn behaviour. The concept of temporal partitioning is used to explain the differences in results between the three species. The conclusion is drawn that these prawns are sensitive to tidal currents, a fact that should be taken into account when physical modifications are made to estuarine environments.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Sat, 09 Jul 2016, 16:56:54 EST by System User