Distribution, prevalence and mean numbers of larvalAnisakis simplex (Nematoda: Ascaridoidea) in Atlantic salmon,Salmo salar L. and their use as biological indicators of host stocks (original) (raw)

Synopsis

An estimate of the arithmetic mean number of larval_Anisakis simplex_ per salmon,Salmo salar, in the north Atlantic was obtained from data collected off west Greenland where salmon from both sides of the Atlantic intermingle. An average of 5.34 larvae was found in the body cavity or associated viscera of 771 age 1 salmon representing some 60.8% of the total number of larvae present. Larval_A. simplex_ were found at all sampling stations throughout the north Atlantic. In most samples prevalence varied only slightly from area to area.

The mean numbers of larvae in the body cavity and on associated organs of salmon in samples from North America were significantly different between samples. Comparisons of the mean numbers of larvae with several known variables in the data were, therefore, considered: host's sex, host's sea-age, geographic locality, year and season of capture.

There was evidence that the mean number of larvae per host was greater in salmon from Europe than in those from North America, but the data could not be used to provide_reliable_ estimates of the mean numbers of larvae from each area because of heterogeneity within areas. Thus the data from west Greenland and from continental home waters could net be used in calculations to determine the percentage composition of North American and European salmon in the Greenland fishery although they supported earlier findings of mixing of salmon stocks off west Greenland.

The use of parasitological data in the identification of different Atlantic salmon stocks is discussed.

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  1. John H. C. Pippy
    Present address: Department of the Environment, Fisheries and Marine Service, Biological Station, St. John's, Newfoundland, Canada

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  1. Department of Zoology, College of Biological Science, University of Guelph, NIG 2W1, Guelph, Ontario, Canada
    Mary Beverley-Burton & John H. C. Pippy

Authors

  1. Mary Beverley-Burton
  2. John H. C. Pippy

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Beverley-Burton, M., Pippy, J.H.C. Distribution, prevalence and mean numbers of larval_Anisakis simplex_ (Nematoda: Ascaridoidea) in Atlantic salmon,Salmo salar L. and their use as biological indicators of host stocks.Environ Biol Fish 3, 211–222 (1978). https://doi.org/10.1007/BF00691945

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