Density‐dependent effects of non‐native brown trout Salmo trutta on the species–area relationship in stream fish assemblages

The spatial scale and density‐dependent effects of non‐native brown trout Salmo trutta on species richness of fish assemblages were examined at 48 study sites in Mamachi Stream, a tributary of Chitose River, Hokkaido, Japan. The density of age ≥1 year S. trutta was high in the upstream side of the m...

Full description

Saved in:
Bibliographic Details
Published in:Journal of fish biology 2017-01, Vol.90 (1), p.370-383
Main Authors: Hasegawa, K., Mori, T., Yamazaki, C.
Format: Article
Language:English
Subjects:
Animal Distribution
Animals
biodiversity
Ecosystem
Fish
interspecific interaction
Introduced Species
Japan
Population Density
Rivers
salmonids
species richness
Trout - physiology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The spatial scale and density‐dependent effects of non‐native brown trout Salmo trutta on species richness of fish assemblages were examined at 48 study sites in Mamachi Stream, a tributary of Chitose River, Hokkaido, Japan. The density of age ≥1 year S. trutta was high in the upstream side of the main stem of Mamachi Stream. Fish species richness increased with increasing area of study sites (habitat size), but the increasing magnitude of the species richness with area decreased with increasing age of ≥1 year S. trutta density. The relationships between age ≥1 year S. trutta, however, and presence–absence of each species seemed to be different among species. Species richness was also determined by location and physical environmental variables, i.e. it was high on the downstream side and in structurally complex environments.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13185