Foraging, bioenergetic and predation constraints on diel vertical migration: field observations and modelling of reverse migration by young-of-the-year herring Clupea harengus

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Diel vertical migration (DVM) of young-of-the-year (YOY) herring Clupea harengus and one of their major predators, pikeperch Sander lucioperca, was examined using bottom-mounted hydroacoustics in HimmerfjÀrden, a brackish bay of the Baltic Sea, in summer. In contrast to previous studies on DVM of C. harengus aggregated across size and age classes, YOY C. harengus showed a reverse DVM trajectory, deeper at night and, on average, shallower during the day. This pattern was observed consistently on five acoustic sampling occasions in 3 years and was corroborated by two out of three trawl surveys. Large acoustic targets (target strength >−33 dB, probably piscivorous S. lucioperca >45 cm) showed a classic DVM trajectory, shallow at night and deeper during the day. Variability in YOY C. harengus vertical distribution peaked at dawn and dusk, and their vertical distribution at midday was distinctly bimodal. This reverse DVM pattern was consistent with bioenergetic model predictions for YOY C. harengus which have rapid gut evacuation rates and do not feed at night. Reverse DVM also resulted in low spatial overlap with predators.

Keywords: bioenergetics; optimal foraging theory; predation; risk-sensitive foraging

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1111/j.1095-8649.2010.02855.x

Affiliations: 1: Department of Systems Ecology, Stockholm University, 106 91 Stockholm, Sweden 2: Gulf of Maine Research Institute, 350 Commercial Street, Portland, ME 04101, U.S.A. 3: Department of Biology, 207 Swenson Science Building, University of Minnesota, 1035 Kirby Drive, Duluth, MN 55812, U.S.A. 4: University of Wisconsin Center for Limnology, 680 N Park Street, Madison, WI 53706, U.S.A.

Publication date: February 1, 2011

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more