A review of methods for estimating mortality due to parasites in wild fish populations

Lester R.J.G. (1984) A review of methods for estimating mortality due to parasites in wild fish populations. Helgoländer Meeresuntersuchungen, 37 1-4: 53-64. doi:10.1007/BF01989295


Author Lester R.J.G.
Title A review of methods for estimating mortality due to parasites in wild fish populations
Journal name Helgoländer Meeresuntersuchungen   Check publisher's open access policy
ISSN 0174-3597
Publication date 1984-01-01
Sub-type Article (original research)
DOI 10.1007/BF01989295
Volume 37
Issue 1-4
Start page 53
End page 64
Total pages 12
Publisher Springer-Verlag
Subject 2300 Environmental Science
1900 Earth and Planetary Sciences
Abstract Six methods are described for detecting mortality due to parasitic infections in natural fish populations. They are: (a) through autopsies; (b) by determining the frequency of infections known to be eventually lethal; (c) by observing a decrease in the prevalence of a long-lived parasite (or permanent scar from a parasite) with host age; (d) by observing a decrease in the variance/mean ratio for the parasites with host age; (e) by comparing the observed frequency of a combination of two independent events with the calculated probability of their occurrence; and finally (f) by comparing the observed frequency distribution of the parasite, with a projected frequency based on data from lightly infected fish. In this technique, negative binomials are fitted to the data and truncated at various points. Some advantages and disadvantages of the different methods are given, together with examples. The methods do not necessarily provide definitive answers, but they are indicative of whether or not significant parasite-related mortality may be occurring, and in some cases provide an estimate of its probable magnitude in terms of the total host mortality rate.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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