Primary versus secondary drivers of foraging activity in sandeel schools (Ammodytes tobianus)

Mikael Seehusen Kruchov Van Deurs; Jane W. Behrens; Thomas Warnar; John Fleng Steffensen

doi:10.1007/s00227-011-1691-x

Primary versus secondary drivers of foraging activity in sandeel schools (Ammodytes tobianus)

Mikael Seehusen Kruchov Van Deurs, Jane W. Behrens, Thomas Warnar, John Fleng Steffensen

Marine Biological Section

9 Citationer (Scopus)

Abstract

The commercially and ecologically valuable sandeel (Ammodytes ssp.) make distinct vertical shifts between an inactive stage, during which they seek refuge in the sand, and a pelagic schooling stage, during which they forage. This characteristic discontinuous foraging pattern constitutes a challenge to fishery biologists and has consequences for a wide range of predators ranging from birds and mammals to commercially important species. However, experimental studies that shed light on the primary drivers of foraging activity in fish are rare. In the present study, whole schools of sandeel (A. tobianus) were caught in August in east Denmark (65A degrees 02'30N; 12A degrees 37'00E) and kept in large tanks in the laboratory. It was found that the amount of food ingested and memory of past days feeding history are primary drivers of foraging activity at the level of the entire school, whereas external factors such as prey concentration and temperature are merely secondary drivers.

Originalsprog	Engelsk
Tidsskrift	Marine Biology
Vol/bind	158
Udgave nummer	8
Sider (fra-til)	1781-1789
Antal sider	9
ISSN	0025-3162
DOI	https://doi.org/10.1007/s00227-011-1691-x
Status	Udgivet - aug. 2011

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10.1007/s00227-011-1691-x

Citationsformater

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title = "Primary versus secondary drivers of foraging activity in sandeel schools (Ammodytes tobianus)",

abstract = "The commercially and ecologically valuable sandeel (Ammodytes ssp.) make distinct vertical shifts between an inactive stage, during which they seek refuge in the sand, and a pelagic schooling stage, during which they forage. This characteristic discontinuous foraging pattern constitutes a challenge to fishery biologists and has consequences for a wide range of predators ranging from birds and mammals to commercially important species. However, experimental studies that shed light on the primary drivers of foraging activity in fish are rare. In the present study, whole schools of sandeel (A. tobianus) were caught in August in east Denmark (65°02′30N; 12°37′00E) and kept in large tanks in the laboratory. It was found that the amount of food ingested and memory of past days feeding history are primary drivers of foraging activity at the level of the entire school, whereas external factors such as prey concentration and temperature are merely secondary drivers.",

author = "{Van Deurs}, {Mikael Seehusen Kruchov} and Behrens, {Jane W.} and Thomas Warnar and Steffensen, {John Fleng}",

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T1 - Primary versus secondary drivers of foraging activity in sandeel schools (Ammodytes tobianus)

AU - Van Deurs, Mikael Seehusen Kruchov

AU - Behrens, Jane W.

AU - Warnar, Thomas

AU - Steffensen, John Fleng

PY - 2011/8

Y1 - 2011/8

N2 - The commercially and ecologically valuable sandeel (Ammodytes ssp.) make distinct vertical shifts between an inactive stage, during which they seek refuge in the sand, and a pelagic schooling stage, during which they forage. This characteristic discontinuous foraging pattern constitutes a challenge to fishery biologists and has consequences for a wide range of predators ranging from birds and mammals to commercially important species. However, experimental studies that shed light on the primary drivers of foraging activity in fish are rare. In the present study, whole schools of sandeel (A. tobianus) were caught in August in east Denmark (65°02′30N; 12°37′00E) and kept in large tanks in the laboratory. It was found that the amount of food ingested and memory of past days feeding history are primary drivers of foraging activity at the level of the entire school, whereas external factors such as prey concentration and temperature are merely secondary drivers.

AB - The commercially and ecologically valuable sandeel (Ammodytes ssp.) make distinct vertical shifts between an inactive stage, during which they seek refuge in the sand, and a pelagic schooling stage, during which they forage. This characteristic discontinuous foraging pattern constitutes a challenge to fishery biologists and has consequences for a wide range of predators ranging from birds and mammals to commercially important species. However, experimental studies that shed light on the primary drivers of foraging activity in fish are rare. In the present study, whole schools of sandeel (A. tobianus) were caught in August in east Denmark (65°02′30N; 12°37′00E) and kept in large tanks in the laboratory. It was found that the amount of food ingested and memory of past days feeding history are primary drivers of foraging activity at the level of the entire school, whereas external factors such as prey concentration and temperature are merely secondary drivers.

U2 - 10.1007/s00227-011-1691-x

DO - 10.1007/s00227-011-1691-x

M3 - Journal article

SN - 0025-3162

VL - 158

SP - 1781

EP - 1789

JO - Marine Biology

JF - Marine Biology

IS - 8

ER -

Primary versus secondary drivers of foraging activity in sandeel schools (Ammodytes tobianus)

Abstract

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