First biologging record of a foraging Red-Throated Loon Gavia stellata shows shallow and efficient diving in freshwater environments

Show full item record



Permalink

http://hdl.handle.net/10138/317156

Citation

Duckworth , J , O'Brien , S , Väisänen , R , Lehikoinen , P , Petersen , I B K , Daunt , F & Green , J A 2020 , ' First biologging record of a foraging Red-Throated Loon Gavia stellata shows shallow and efficient diving in freshwater environments ' , Marine Ornithology , vol. 48 , no. 1 , pp. 17-22 .

Title: First biologging record of a foraging Red-Throated Loon Gavia stellata shows shallow and efficient diving in freshwater environments
Author: Duckworth, James; O'Brien, Susan; Väisänen, Roni; Lehikoinen, Petieri; Petersen, I. B. Krag; Daunt, Francis; Green, Jonathan A.
Contributor: University of Helsinki, Zoology
Date: 2020-04
Number of pages: 6
Belongs to series: Marine Ornithology
ISSN: 1018-3337
URI: http://hdl.handle.net/10138/317156
Abstract: Recently, Red-throated Loons Gavia stellata (RTL) have been the subject of increased interest due to their negative interactions with shipping, offshore wind farms, and other marine industry activities. This has driven a desire to quantify the behaviour and ecology of this understudied species, particularly during the non-breeding season. To achieve this, Time Depth Recorder (TDR) and Global Location Sensor (GLS) tags were deployed on individuals from several European locations. Due to an incidental mortality, one set of tags was retrieved early. The single set of tags recorded activity from June to August 2018. The TDR collected records for 14 d, providing the first ever biologging data on RTL foraging in Europe. The bird was tagged 90 km from the coast; therefore, it only used freshwater lakes and was never recorded entering saltwater. The individual mostly undertook shallow dives, with maximum and mean depths of 20 m and 5.4 m, respectively. Foraging constituted 22.9% of total activity during the sampling period. The RTL had diel foraging patterns. with dives being shallower and more frequent at times of "twilight" compared to "daylight." These results provide novel information on an RTL's diurnal patterns of water depth usage and foraging effort during the summer, demonstrating the potential of data loggers to provide key insights into the foraging ecology of this species
Subject: Red-throated Loon
Finland
foraging
time depth recorder
geolocator
GUILLEMOTS URIA-LOMVIA
WIND FARMS
BEHAVIOR
POPULATION
MIGRATION
HABITATS
PATTERNS
SEABIRDS
BIRDS
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
48_1_17_22.pdf 497.0Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record