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Ontogeny of swimming speed, schooling behaviour and jellyfish avoidance by Japanese anchovy Engraulis japonicus.
MedLine Citation:
PMID:  21539545     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The ontogeny of swimming speed, schooling behaviour and jellyfish avoidance was studied in hatchery-reared Japanese anchovy Engraulis japonicus to compare its life-history strategy with two other common pelagic fishes, jack mackerel Trachurus japonicus and chub mackerel Scomber japonicus. Cruise swimming speed of E. japonicus increased allometrically from 1·4 to 3·9 standard length (L(S) ) per s (L(S) s(-1) ) from early larval to metamorphosing stage. Burst swimming speed also increased from 6·1 to 28 L(S) s(-1) in these stages. Cruise speed was inferior to that of S. japonicus, as was burst speed to that of T. japonicus. Engraulis japonicus larvae were highly vulnerable to predation by moon jellyfish Aurelia aurita and were readily eaten until they reached 23 mm L(S) , but not at 26 mm L(S) . Schooling behaviour (indicated by parallel swimming) started at c. 17 mm L(S) . Average distance to the nearest neighbour was shorter than values reported in other pelagic fishes. The relatively low predator avoidance capability of E. japonicus may be compensated for by their transparent and thus less conspicuous body, in addition to their early maturation and high fecundity.
Authors:
R Masuda
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Publication Detail:
Type:  Journal Article     Date:  2011-04-04
Journal Detail:
Title:  Journal of fish biology     Volume:  78     ISSN:  1095-8649     ISO Abbreviation:  J. Fish Biol.     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-05-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1323-35     Citation Subset:  IM    
Copyright Information:
© 2011 The Author. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles.
Affiliation:
Maizuru Fisheries Research Station, Kyoto University, Nagahama, Maizuru, Kyoto 625-0086, Japan.
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