Measuring and Correcting for Size Selection in Electrofishing Mark–Recapture Experiments

Anderson, Charles S.

doi:10.1577/1548-8659(1995)124<0663:macfss>2.3.co;2

Cited by 65 publications

(61 citation statements)

References 21 publications

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“…In simulations, we confirm that individual heterogeneity in capture rates can bias estimates of p. The finding that larger fish are easier to recapture is consistent in other studies (Anderson 1995;Dolan & Miranda 2003). Our simulations show that failing to account for this effect led to overestimates of p, which is consistent with the general observation that unaccounted for heterogeneity in capture probabilities across a population will lead to underestimates of N (Hwang & Huggins 2005).…”

Section: Discussionsupporting

confidence: 89%

Estimating population size in the presence of temporary migration using a joint analysis of telemetry and capture–recapture data

et al. 2014

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Summary1. Temporary migration -where individuals can leave and re-enter a sampled population -is a feature of many capture-mark-recapture (CMR) studies of mobile populations which, if unaccounted for, can lead to biased estimates of population capture probabilities and consequently biased estimates of population abundance. 2. We present a method for incorporating radiotelemetry data within a CMR study to eliminate bias due to temporary migration using a Bayesian state-space model. 3. Our results indicate that using a relatively small number of telemetry tags, it is possible to greatly reduce bias in estimates of capture probabilities using telemetry data to model transition probabilities in and out of the sampling area. In a capture-recapture data set for trout Cod in the Murray river, Australia, accounting for temporary migration led to overall higher estimates of capture probabilities than models assuming permanent or zero migration. Also, individual heterogeneity in detectability can be managed through explicit modelling. We show how accounting for temporary migration when estimating capture probabilities can be used to estimate the abundance and size distribution of a population as though it were closed. 4. Our model provides a basis for more complex models that might integrate telemetry data into other CMR scenarios, thus allowing for greater precision in estimates of vital rates that might otherwise be biased by temporary migration. Our results highlight the importance of accounting for migration in survey design and parameter estimation, and the potential scope for supplementing large-scale CMR data sets with a subset of auxiliary data that provide information on processes that are hidden to primary sampling processes.

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Section: Discussionsupporting

confidence: 89%

Estimating population size in the presence of temporary migration using a joint analysis of telemetry and capture–recapture data

et al. 2014

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“…Estimated capture 390 probability was greater for age 1+ than age 0+ in the open sites, and declined with 391 increasing total capture for both age groups. The greater estimated capture probability 392 of the older (and larger) Atlantic salmon age groups is consistent with the literature, 393 which has shown a greater capture probability for larger individuals (Anderson, 1995 …”

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confidence: 83%

Improving abundance estimates from electrofishing removal sampling

et al. 2013

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“…Where: N = the population estimate M = the number of fish marked C = the number of fish in the recapture sample R = the number of recaptures in the recapture sample Rainbow trout and mountain whitefish estimates were stratified into length groups because the size-selective nature of electrofishing can introduce bias into population estimates (Anderson 1995;Reynolds 1996). Binomial confidence intervals were calculated as recommended by Seber (1982) using the chart provided by Krebs (1989).…”

Section: Kootenai River Fish Population Assessmentmentioning

confidence: 99%

Kootenai River Fisheries Investigations; Rainbow and Bull Trout Recruitment, 1999 Annual Report.

Walters¹,

Downs²

2001

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Measuring and Correcting for Size Selection in Electrofishing Mark–Recapture Experiments

Cited by 65 publications

References 21 publications

Estimating population size in the presence of temporary migration using a joint analysis of telemetry and capture–recapture data

Estimating population size in the presence of temporary migration using a joint analysis of telemetry and capture–recapture data

Improving abundance estimates from electrofishing removal sampling

Kootenai River Fisheries Investigations; Rainbow and Bull Trout Recruitment, 1999 Annual Report.

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