NDLI: Predation dynamics of mackerel on larval and juvenile anchovy: is capture success linked to prey condition?

Content Provider	Springer Nature Link
Author	Robert, Dominique Takasuka, Akinori Nakatsuka, Sayaka Kubota, Hiroshi Oozeki, Yoshioki Nishida, Hiroshi Fortier, Louis
Copyright Year	2010
Abstract	We tested whether the predation dynamics of chub mackerel Scomber japonicus and spotted mackerel S. australasicus on young anchovy Engraulis japonicus relates to individual growth characteristics of the prey and could account for the growth-selective survival predicted by recruitment hypotheses. Juvenile and adult mackerel were sampled along with their young anchovy prey field in 2004 (juvenile mackerel and larval anchovy) and 2005 (adult mackerel and juvenile anchovy) off the Pacific coast of Honshu, Japan. The recent 5-day mean growth rate of larval and juvenile survivors and prey found in the stomach of mackerel was estimated from the otolith microstructure. No significant difference was found between the recent growth of larval or juvenile survivors and that of preyed individuals. We conclude that despite a relatively small body size, the high activity level and predation skills displayed by mackerel prevent fast-growing larvae and early juveniles from benefitting in terms of the expected survival advantage over slow-growers. Hence, growth-selective predation mortality of larval fish would depend on the feeding ecology of the predator rather than predator size. Selection for fast growth is more likely to occur under predation pressure from invertebrate organisms and small pelagic fish specialized on zooplankton, such as herring and anchovy.
Starting Page	183
Ending Page	188
Page Count	6
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	76
Issue Number	2
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2010-01-16
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Growth rate Growth-selective predation Larval and juvenile anchovy Mackerel Otolith microstructure Predation mortality Food Science Freshwater & Marine Ecology Fish & Wildlife Biology & Management
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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