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Animal Biodiversity and Conservation. Volume 38.1 (2015) Pages: 77-86

Estimating population size of the cave shrimp Troglocaris anophthalmus (Crustacea, Decapoda, Caridea) using mark–release–recapture data

Jugovic, J., Praprotnik, E., Buzan, E. V., Lužnik, M.

DOI: https://doi.org/10.32800/abc.2015.38.0077

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Abstract

Population size estimates are lacking for many small cave–dwelling aquatic invertebrates that are vulnerable to groundwater contamination from anthropogenic activities. Here we estimated the population size of freshwater shrimp Troglocaris anophthalmus sontica (Crustacea, Decapoda, Caridea) based on mark–release–recapture techniques. The subspecies was investigated in Vipavska jama (Vipava cave), Slovenia, with estimates of sex ratio and age distribution. A high abundance of shrimps was found even after considering the lower limit of the confidence intervals. However, we found no evidence of differences in shrimp abundances between summer and winter. The population was dominated by females. Ease of capture and abundant population numbers indicate that these cave shrimps may be useful as a bioindicator in cave ecosystems.

Keywords

Mark–release–recapture, Population size, Dinarides, Vipavska jama, Sex ratio

Cite

Jugovic, J., Praprotnik, E., Buzan, E. V., Lužnik, M., 2015. Estimating population size of the cave shrimp Troglocaris anophthalmus (Crustacea, Decapoda, Caridea) using mark–release–recapture data. Animal Biodiversity and Conservation, 38: 77-86, DOI: https://doi.org/10.32800/abc.2015.38.0077

Reception date:

25/03/2014

Acceptation date:

17/02/2015

Publication date:

05/05/2015

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