Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland

Faxaflói bay is known to be exploited by migratory species such as minke whales (Balaenoptera acutorostrata) and white-beaked dolphins (Lagenorhynchus albirostris) which are however resident in Icelandic waters. The aim of this study was to examine feeding behaviour utilized by both species and thei...

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Bibliographic Details
Main Author: Bertulli, Chiara Giulia
Other Authors: Háskóli Íslands
Format: Thesis
Language:English
Published: 2010
Subjects:
Online Access:http://hdl.handle.net/1946/6216
id ftskemman:oai:skemman.is:1946/6216
record_format openpolar
spelling ftskemman:oai:skemman.is:1946/6216 2023-05-15T15:36:05+02:00 Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland Bertulli, Chiara Giulia Háskóli Íslands 2010-08 application/pdf http://hdl.handle.net/1946/6216 en eng http://hdl.handle.net/1946/6216 Líffræði Hnýðingur Hrefna Fæðuöflun dýra Faxaflói Thesis Master's 2010 ftskemman 2022-12-11T06:57:59Z Faxaflói bay is known to be exploited by migratory species such as minke whales (Balaenoptera acutorostrata) and white-beaked dolphins (Lagenorhynchus albirostris) which are however resident in Icelandic waters. The aim of this study was to examine feeding behaviour utilized by both species and their feeding association with seabird species. There seem to be preferable feeding grounds for B. acutorostrata and L. albirostris in Faxaflói bay, located approximately 10-12 nm west from Kollafjörður and the Garður area where both species were sighted especially during spring months. Minke whales display a wide range of well-known engulfment and entrapment feeding manoeuvres, although the first where more easily observed (2008: n=137; 2009: n=132). Additionally, a novel feeding manoeuvre termed ‘sharking’ was first time described in 2008 (1.5%, n=2) whose occurrence increase in 2009 (7.6%, n=10). L. albirostris foraging behaviour (2008: n=39; 2009: n=23) was found to be composed of a wide range of aerial behaviours among which most common were ‘noisy leaps’ (i.e. leaping, breaching, back-breaching, tail-slapping). L. albirostris foraging behaviour was primarily observed in multi-species groups of all occurring in particular in presence of humpback whales (2008-2009: 30%, n=7, <5m) and minke whales (2008-2009: 13%, n=3, <100m). Significant correlations were found for minke whales and white-beaked dolphins recorded in association with different seabird species during feeding bouts. Last, the first minke whales ID-Catalogue was established in the area counting 311 identifiable individuals. In all 245 white-beaked dolphins were also identified. Both species showed a low re-sighting rate (Ba: 14.5%; La: 11.4%). Faxaflói er nýttur af hvaltegundunum hrefnu (Balaenoptera acutorostrata) og hnýðingi (Lagenorhynchus albirostris), en síðarnefnda tegundin er líklega er staðbundin á Íslandsmiðum. Markmið rannsóknanna var að kanna fæðuatferli hrefnu og hnýðings, og tengsl fæðuatferlis þeirra við útbreiðslu og fæðuatferli ... Thesis Balaenoptera acutorostrata Iceland Lagenorhynchus albirostris minke whale White-beaked dolphin Skemman (Iceland) Faxaflói ENVELOPE(-22.451,-22.451,64.322,64.322) Garður ENVELOPE(-22.651,-22.651,64.071,64.071)
institution Open Polar
collection Skemman (Iceland)
op_collection_id ftskemman
language English
topic Líffræði
Hnýðingur
Hrefna
Fæðuöflun dýra
Faxaflói
spellingShingle Líffræði
Hnýðingur
Hrefna
Fæðuöflun dýra
Faxaflói
Bertulli, Chiara Giulia
Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland
topic_facet Líffræði
Hnýðingur
Hrefna
Fæðuöflun dýra
Faxaflói
description Faxaflói bay is known to be exploited by migratory species such as minke whales (Balaenoptera acutorostrata) and white-beaked dolphins (Lagenorhynchus albirostris) which are however resident in Icelandic waters. The aim of this study was to examine feeding behaviour utilized by both species and their feeding association with seabird species. There seem to be preferable feeding grounds for B. acutorostrata and L. albirostris in Faxaflói bay, located approximately 10-12 nm west from Kollafjörður and the Garður area where both species were sighted especially during spring months. Minke whales display a wide range of well-known engulfment and entrapment feeding manoeuvres, although the first where more easily observed (2008: n=137; 2009: n=132). Additionally, a novel feeding manoeuvre termed ‘sharking’ was first time described in 2008 (1.5%, n=2) whose occurrence increase in 2009 (7.6%, n=10). L. albirostris foraging behaviour (2008: n=39; 2009: n=23) was found to be composed of a wide range of aerial behaviours among which most common were ‘noisy leaps’ (i.e. leaping, breaching, back-breaching, tail-slapping). L. albirostris foraging behaviour was primarily observed in multi-species groups of all occurring in particular in presence of humpback whales (2008-2009: 30%, n=7, <5m) and minke whales (2008-2009: 13%, n=3, <100m). Significant correlations were found for minke whales and white-beaked dolphins recorded in association with different seabird species during feeding bouts. Last, the first minke whales ID-Catalogue was established in the area counting 311 identifiable individuals. In all 245 white-beaked dolphins were also identified. Both species showed a low re-sighting rate (Ba: 14.5%; La: 11.4%). Faxaflói er nýttur af hvaltegundunum hrefnu (Balaenoptera acutorostrata) og hnýðingi (Lagenorhynchus albirostris), en síðarnefnda tegundin er líklega er staðbundin á Íslandsmiðum. Markmið rannsóknanna var að kanna fæðuatferli hrefnu og hnýðings, og tengsl fæðuatferlis þeirra við útbreiðslu og fæðuatferli ...
author2 Háskóli Íslands
format Thesis
author Bertulli, Chiara Giulia
author_facet Bertulli, Chiara Giulia
author_sort Bertulli, Chiara Giulia
title Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland
title_short Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland
title_full Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland
title_fullStr Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland
title_full_unstemmed Minke whale (Balaenoptera acutorostrata) and white-beaked dolphin (Lagenorhynchus albirostris) feeding behaviour in Faxaflói bay, south-west Iceland
title_sort minke whale (balaenoptera acutorostrata) and white-beaked dolphin (lagenorhynchus albirostris) feeding behaviour in faxaflói bay, south-west iceland
publishDate 2010
url http://hdl.handle.net/1946/6216
long_lat ENVELOPE(-22.451,-22.451,64.322,64.322)
ENVELOPE(-22.651,-22.651,64.071,64.071)
geographic Faxaflói
Garður
geographic_facet Faxaflói
Garður
genre Balaenoptera acutorostrata
Iceland
Lagenorhynchus albirostris
minke whale
White-beaked dolphin
genre_facet Balaenoptera acutorostrata
Iceland
Lagenorhynchus albirostris
minke whale
White-beaked dolphin
op_relation http://hdl.handle.net/1946/6216
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