Dominance and size affect foraging position choice by Arctic grayling (Thymallus arcticus).

ABSTRACT: Salmonid fishes are a widespread and economically important group of fishes that are strongly affected by anthropogenic environmental degradation. Consequently, studies on their behavior and ecology are essential for their conservation. Wild Arctic grayling (Thymallus arcticus) were observed in an unimpacted Alaskan river using underwater video observations for two consecutive summers (2015 and 2016). Foraging, aggressive behavior, and position held by individual fish were quantified. Fish held focal positions in the water column most of the time (mean = 81%), active foraging was observed for 14% of the observation periods, and antagonistic interactions occurred during 5% of the time. The analysis of intraspecific aggression revealed that aggressive interactions occurred between conspecifi

SUBMITTER: Holubova M 

PROVIDER: S-EPMC11842183 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature