Time-series models of sea lice Caligus elongatus (Nordmann) abundance on Atlantic salmon Salmo Salar L. in Loch Sunart, Scotland

Eddie McKenzie, George Gettinby, Kevin McCart, Crawford W. Revie

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Most lice infestations on salmon farmed in the North Atlantic are attributed to Caligus elongatus and Lepeophtheirus salmonis. This study reports findings from time-series analysis conducted on observations of the lesser-studied C. elongatus, in four farms on the west coast of Scotland over the period 1996-2000. Least-squares and Poisson regression techniques were applied to one individual site and to the aggregated data of four sites. Models were fitted and tested for goodness of fit using appropriate statistical methods. Findings indicate that infestation levels are highly seasonal with rapidly increasing numbers after week 22 of the year followed by a steady decline from week 40. Abundance is much lower in the second year of the production cycle than the first. Neither of the models indicated that treatment application has a significant effect on C. elongatus infestations.
LanguageEnglish
Pages764-772
Number of pages8
JournalAquaculture Research
Volume35
Issue number8
DOIs
Publication statusPublished - Jul 2004

Fingerprint

Caligus elongatus
Caligidae
louse
Scotland
Salmo salar
time series analysis
time series
lakes
lice infestations
Lepeophtheirus salmonis
farm
salmon
least squares
coast
statistical analysis
coasts
farms
sea
methodology

Keywords

  • time-series analysis
  • aquatic epidemiology
  • fish farming
  • salmon
  • Caligus elongatus

Cite this

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title = "Time-series models of sea lice Caligus elongatus (Nordmann) abundance on Atlantic salmon Salmo Salar L. in Loch Sunart, Scotland",
abstract = "Most lice infestations on salmon farmed in the North Atlantic are attributed to Caligus elongatus and Lepeophtheirus salmonis. This study reports findings from time-series analysis conducted on observations of the lesser-studied C. elongatus, in four farms on the west coast of Scotland over the period 1996-2000. Least-squares and Poisson regression techniques were applied to one individual site and to the aggregated data of four sites. Models were fitted and tested for goodness of fit using appropriate statistical methods. Findings indicate that infestation levels are highly seasonal with rapidly increasing numbers after week 22 of the year followed by a steady decline from week 40. Abundance is much lower in the second year of the production cycle than the first. Neither of the models indicated that treatment application has a significant effect on C. elongatus infestations.",
keywords = "time-series analysis, aquatic epidemiology, fish farming, salmon, Caligus elongatus",
author = "Eddie McKenzie and George Gettinby and Kevin McCart and Revie, {Crawford W.}",
note = "Also presented at: Sea Lice Conference, 14-15 July 2003, St Andrews, Canada. [V: 2704]",
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Time-series models of sea lice Caligus elongatus (Nordmann) abundance on Atlantic salmon Salmo Salar L. in Loch Sunart, Scotland. / McKenzie, Eddie; Gettinby, George; McCart, Kevin; Revie, Crawford W.

In: Aquaculture Research, Vol. 35, No. 8, 07.2004, p. 764-772.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Time-series models of sea lice Caligus elongatus (Nordmann) abundance on Atlantic salmon Salmo Salar L. in Loch Sunart, Scotland

AU - McKenzie, Eddie

AU - Gettinby, George

AU - McCart, Kevin

AU - Revie, Crawford W.

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AB - Most lice infestations on salmon farmed in the North Atlantic are attributed to Caligus elongatus and Lepeophtheirus salmonis. This study reports findings from time-series analysis conducted on observations of the lesser-studied C. elongatus, in four farms on the west coast of Scotland over the period 1996-2000. Least-squares and Poisson regression techniques were applied to one individual site and to the aggregated data of four sites. Models were fitted and tested for goodness of fit using appropriate statistical methods. Findings indicate that infestation levels are highly seasonal with rapidly increasing numbers after week 22 of the year followed by a steady decline from week 40. Abundance is much lower in the second year of the production cycle than the first. Neither of the models indicated that treatment application has a significant effect on C. elongatus infestations.

KW - time-series analysis

KW - aquatic epidemiology

KW - fish farming

KW - salmon

KW - Caligus elongatus

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