Probabilistic models for understanding inland amphipods water population abundances in Andean stream (Caspana, 23°S, Antofagasta region, Chile)-Reference-Cited by-同舟云学术

Probabilistic models for understanding inland amphipods water population abundances in Andean stream (Caspana, 23°S, Antofagasta region, Chile)

Published:2023-11-01 Issue:4 Volume:73 Page:399-406
ISSN:1570-7555
Container-title:Animal Biology
language:
Short-container-title:Animal Biol.

Author:

De los Ríos-Escalante Patricio¹²^ORCID,Wilson Rodolfo³,Esse Carlos⁴^ORCID

Affiliation:

1. Facultad de Recursos Naturales, Departamento de Ciencias Biológicas y Químicas, https://dx.doi.org/28046Universidad Católica de Temuco, Casilla 15-D, Temuco, Chile

2. Núcleo de Estudios Ambientales UC, Temuco, Chile

3. Facultad de Ciencias del Mar y Recursos Hidrobiológicos, Departamento de Ciencias Acuáticas y Ambientales, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile

4. Instituto Iberoamericano de Desarrollo Sostenible (IIDS), Unidad de Cambio Climático y Medio Ambiente (UCCMA), Universidad Autónoma de Chile, Temuco, Chile

Abstract

Abstract The Andes mountains in northern Chile have numerous small permanent and intermittent streams that are poorly studied; among the most reported species are amphipods of the genus Hyalella, specifically H. fossamanchini and H. kochi. The aim of the present study was to do a first characterization of populations of both amphipod species in a small stream (Caspana, 23°S; 3200 m a.s.l.), that was visited in September 2022. The first results using a Kruskall-Wallis nonparametric test revealed that the abundances of both species and unidentified juveniles were not significantly different in a comparison of two sites, whereas a Mann-Wittney nonparametric U test gave similar results when each species and juveniles were compared between sites. The results of variance/mean ratio revealed the existence of an aggregated pattern, and a negative binomial distribution for all samples. The occurrence of an aggregated pattern and the consequent negative binomial distribution is a very frequent pattern for inland water invertebrates in Chilean rivers.

Funder

MECESUP UCT.

Universidad de Antofagasta.

Publisher

Brill

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

Link

https://brill.com/downloadpdf/journals/ab/73/4/article-p399_4.xml

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