Fishing vs. natural recruitment variation in sandeels as a cause of seabird breeding failure at Shetland: a modelling approach

Elvira S. Poloczanska, Robin M. Cook, Graeme D. Ruxton, Peter J. Wright

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Sandeels represent a major component in the diet of fish, bird, and mammal predators as well as supporting a large industrial fishery. The availability of young sandeels in coastal waters around Shetland is generally considered a key factor influencing the breeding success of many seabird species in the area, but the risk to the populations as a direct consequence of the fishery is unknown. Low exploitation rates coupled with high natural mortality rates make assessment of the Shetland sandeel stock problematic and safe biological limits have not yet been defined. We use stochastic models to evaluate the likely effect of varying fishing mortality on kittiwake breeding success. The models consider some main sources of uncertainty about natural processes, such as recruitment and natural mortality, which may affect the design of robust management strategies. The type of model tested had a stronger influence on sandeel recruitment than the level of fishing pressure. Even with low exploitation rates, poor years for seabird breeding were inevitable.

LanguageEnglish
Pages788-797
Number of pages10
JournalICES Journal of Marine Science
Volume61
Issue number5
DOIs
Publication statusPublished - 1 Aug 2004
Externally publishedYes

Fingerprint

seabird
seabirds
fishing
breeding
reproductive success
fishery
fisheries
modeling
mortality
fishing mortality
coastal water
mammal
uncertainty
predator
mammals
diet
bird
predators
birds
fish

Keywords

  • kittiwake
  • sandeel
  • seabird breeding
  • Shetland

Cite this

@article{ec3fbe3779c0422099806b5d60938045,
title = "Fishing vs. natural recruitment variation in sandeels as a cause of seabird breeding failure at Shetland: a modelling approach",
abstract = "Sandeels represent a major component in the diet of fish, bird, and mammal predators as well as supporting a large industrial fishery. The availability of young sandeels in coastal waters around Shetland is generally considered a key factor influencing the breeding success of many seabird species in the area, but the risk to the populations as a direct consequence of the fishery is unknown. Low exploitation rates coupled with high natural mortality rates make assessment of the Shetland sandeel stock problematic and safe biological limits have not yet been defined. We use stochastic models to evaluate the likely effect of varying fishing mortality on kittiwake breeding success. The models consider some main sources of uncertainty about natural processes, such as recruitment and natural mortality, which may affect the design of robust management strategies. The type of model tested had a stronger influence on sandeel recruitment than the level of fishing pressure. Even with low exploitation rates, poor years for seabird breeding were inevitable.",
keywords = "kittiwake, sandeel, seabird breeding, Shetland",
author = "Poloczanska, {Elvira S.} and Cook, {Robin M.} and Ruxton, {Graeme D.} and Wright, {Peter J.}",
year = "2004",
month = "8",
day = "1",
doi = "10.1016/j.icesjms.2004.03.030",
language = "English",
volume = "61",
pages = "788--797",
journal = "ICES Journal of Marine Science",
issn = "1054-3139",
number = "5",

}

Fishing vs. natural recruitment variation in sandeels as a cause of seabird breeding failure at Shetland : a modelling approach. / Poloczanska, Elvira S.; Cook, Robin M.; Ruxton, Graeme D.; Wright, Peter J.

In: ICES Journal of Marine Science, Vol. 61, No. 5, 01.08.2004, p. 788-797.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fishing vs. natural recruitment variation in sandeels as a cause of seabird breeding failure at Shetland

T2 - ICES Journal of Marine Science

AU - Poloczanska, Elvira S.

AU - Cook, Robin M.

AU - Ruxton, Graeme D.

AU - Wright, Peter J.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - Sandeels represent a major component in the diet of fish, bird, and mammal predators as well as supporting a large industrial fishery. The availability of young sandeels in coastal waters around Shetland is generally considered a key factor influencing the breeding success of many seabird species in the area, but the risk to the populations as a direct consequence of the fishery is unknown. Low exploitation rates coupled with high natural mortality rates make assessment of the Shetland sandeel stock problematic and safe biological limits have not yet been defined. We use stochastic models to evaluate the likely effect of varying fishing mortality on kittiwake breeding success. The models consider some main sources of uncertainty about natural processes, such as recruitment and natural mortality, which may affect the design of robust management strategies. The type of model tested had a stronger influence on sandeel recruitment than the level of fishing pressure. Even with low exploitation rates, poor years for seabird breeding were inevitable.

AB - Sandeels represent a major component in the diet of fish, bird, and mammal predators as well as supporting a large industrial fishery. The availability of young sandeels in coastal waters around Shetland is generally considered a key factor influencing the breeding success of many seabird species in the area, but the risk to the populations as a direct consequence of the fishery is unknown. Low exploitation rates coupled with high natural mortality rates make assessment of the Shetland sandeel stock problematic and safe biological limits have not yet been defined. We use stochastic models to evaluate the likely effect of varying fishing mortality on kittiwake breeding success. The models consider some main sources of uncertainty about natural processes, such as recruitment and natural mortality, which may affect the design of robust management strategies. The type of model tested had a stronger influence on sandeel recruitment than the level of fishing pressure. Even with low exploitation rates, poor years for seabird breeding were inevitable.

KW - kittiwake

KW - sandeel

KW - seabird breeding

KW - Shetland

UR - http://www.scopus.com/inward/record.url?scp=4544276184&partnerID=8YFLogxK

U2 - 10.1016/j.icesjms.2004.03.030

DO - 10.1016/j.icesjms.2004.03.030

M3 - Article

VL - 61

SP - 788

EP - 797

JO - ICES Journal of Marine Science

JF - ICES Journal of Marine Science

SN - 1054-3139

IS - 5

ER -