Spatial and temporal trends in the distribution of harbour porpoises, white-beaked dolphins and minke whales off Aberdeenshire (UK), north-western North Sea

Caroline Ruth Weir, Karen Stockin, Graham John Pierce

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Most North Sea cetacean species are wide-ranging and consequently poorly Studied. Spatial and temporal trends in the distribution of the harbour porpoise Phocoena phocoena, white-beaked delphin Lagenorhynchus albirostris, and minke whale Balaenoptera acutorostrata were assessed at a coastal North Sea study, area in Aberdeen shire, Scotland. Between March 1999 and October 2001, cetacean data were collected using both land- and vessel-based survey methods. A total of 174 sightings of these three cetacean species was recorded during approximately 330 h of combined survey effort (228 It land-based and 102 h vessel-based). Harbour porpoises were present throughout the year with peak occurrence during August and September. The presence of white-beaked dolphins and minke whales was strictly seasonal, with it peak in occurrence during August. The fine-scale distribution of all three species varied within the study area, with an apparent preference for sections of coast adjacent to deeper water. Most porpoise calves and juveniles were recorded between June and September, when 35% of harbour porpoise groups contained immature animals. The proportion of calves amongst porpoise sightings was higher during June than any other month. White-beaked dolphin calves were Present in 32% of groups, and occurred in all three months that the species was recorded. Group size was higher in white-beaked dolphin pods containing immature animals. The strong seasonality in occurrence of all three species may relate to requirements for breeding habitat, movements of shared prey species and/or inter specific competition with other species.

Original languageEnglish
Pages (from-to)327-338
Number of pages12
JournalJournal of the Marine Biological Association of the United Kingdom
Volume87
Issue number1
DOIs
Publication statusPublished - Feb 2007

Keywords

  • bottle-nosed dolphins
  • phocoena-phocoena L
  • balaenoptera-acutorostrata
  • Scottish waters
  • stomach contents
  • abundance
  • cetaceans
  • Scotland
  • mammals
  • fundy

Cite this

Spatial and temporal trends in the distribution of harbour porpoises, white-beaked dolphins and minke whales off Aberdeenshire (UK), north-western North Sea. / Weir, Caroline Ruth; Stockin, Karen; Pierce, Graham John.

In: Journal of the Marine Biological Association of the United Kingdom, Vol. 87, No. 1, 02.2007, p. 327-338.

Research output: Contribution to journalArticle

@article{f7b1966c0cee4725b9bd8537cfd3ba16,
title = "Spatial and temporal trends in the distribution of harbour porpoises, white-beaked dolphins and minke whales off Aberdeenshire (UK), north-western North Sea",
abstract = "Most North Sea cetacean species are wide-ranging and consequently poorly Studied. Spatial and temporal trends in the distribution of the harbour porpoise Phocoena phocoena, white-beaked delphin Lagenorhynchus albirostris, and minke whale Balaenoptera acutorostrata were assessed at a coastal North Sea study, area in Aberdeen shire, Scotland. Between March 1999 and October 2001, cetacean data were collected using both land- and vessel-based survey methods. A total of 174 sightings of these three cetacean species was recorded during approximately 330 h of combined survey effort (228 It land-based and 102 h vessel-based). Harbour porpoises were present throughout the year with peak occurrence during August and September. The presence of white-beaked dolphins and minke whales was strictly seasonal, with it peak in occurrence during August. The fine-scale distribution of all three species varied within the study area, with an apparent preference for sections of coast adjacent to deeper water. Most porpoise calves and juveniles were recorded between June and September, when 35{\%} of harbour porpoise groups contained immature animals. The proportion of calves amongst porpoise sightings was higher during June than any other month. White-beaked dolphin calves were Present in 32{\%} of groups, and occurred in all three months that the species was recorded. Group size was higher in white-beaked dolphin pods containing immature animals. The strong seasonality in occurrence of all three species may relate to requirements for breeding habitat, movements of shared prey species and/or inter specific competition with other species.",
keywords = "bottle-nosed dolphins, phocoena-phocoena L, balaenoptera-acutorostrata, Scottish waters, stomach contents, abundance, cetaceans, Scotland, mammals, fundy",
author = "Weir, {Caroline Ruth} and Karen Stockin and Pierce, {Graham John}",
year = "2007",
month = "2",
doi = "10.1017/S0025315407052721",
language = "English",
volume = "87",
pages = "327--338",
journal = "Journal of the Marine Biological Association of the United Kingdom",
issn = "0025-3154",
publisher = "Cambridge University Press",
number = "1",

}

TY - JOUR

T1 - Spatial and temporal trends in the distribution of harbour porpoises, white-beaked dolphins and minke whales off Aberdeenshire (UK), north-western North Sea

AU - Weir, Caroline Ruth

AU - Stockin, Karen

AU - Pierce, Graham John

PY - 2007/2

Y1 - 2007/2

N2 - Most North Sea cetacean species are wide-ranging and consequently poorly Studied. Spatial and temporal trends in the distribution of the harbour porpoise Phocoena phocoena, white-beaked delphin Lagenorhynchus albirostris, and minke whale Balaenoptera acutorostrata were assessed at a coastal North Sea study, area in Aberdeen shire, Scotland. Between March 1999 and October 2001, cetacean data were collected using both land- and vessel-based survey methods. A total of 174 sightings of these three cetacean species was recorded during approximately 330 h of combined survey effort (228 It land-based and 102 h vessel-based). Harbour porpoises were present throughout the year with peak occurrence during August and September. The presence of white-beaked dolphins and minke whales was strictly seasonal, with it peak in occurrence during August. The fine-scale distribution of all three species varied within the study area, with an apparent preference for sections of coast adjacent to deeper water. Most porpoise calves and juveniles were recorded between June and September, when 35% of harbour porpoise groups contained immature animals. The proportion of calves amongst porpoise sightings was higher during June than any other month. White-beaked dolphin calves were Present in 32% of groups, and occurred in all three months that the species was recorded. Group size was higher in white-beaked dolphin pods containing immature animals. The strong seasonality in occurrence of all three species may relate to requirements for breeding habitat, movements of shared prey species and/or inter specific competition with other species.

AB - Most North Sea cetacean species are wide-ranging and consequently poorly Studied. Spatial and temporal trends in the distribution of the harbour porpoise Phocoena phocoena, white-beaked delphin Lagenorhynchus albirostris, and minke whale Balaenoptera acutorostrata were assessed at a coastal North Sea study, area in Aberdeen shire, Scotland. Between March 1999 and October 2001, cetacean data were collected using both land- and vessel-based survey methods. A total of 174 sightings of these three cetacean species was recorded during approximately 330 h of combined survey effort (228 It land-based and 102 h vessel-based). Harbour porpoises were present throughout the year with peak occurrence during August and September. The presence of white-beaked dolphins and minke whales was strictly seasonal, with it peak in occurrence during August. The fine-scale distribution of all three species varied within the study area, with an apparent preference for sections of coast adjacent to deeper water. Most porpoise calves and juveniles were recorded between June and September, when 35% of harbour porpoise groups contained immature animals. The proportion of calves amongst porpoise sightings was higher during June than any other month. White-beaked dolphin calves were Present in 32% of groups, and occurred in all three months that the species was recorded. Group size was higher in white-beaked dolphin pods containing immature animals. The strong seasonality in occurrence of all three species may relate to requirements for breeding habitat, movements of shared prey species and/or inter specific competition with other species.

KW - bottle-nosed dolphins

KW - phocoena-phocoena L

KW - balaenoptera-acutorostrata

KW - Scottish waters

KW - stomach contents

KW - abundance

KW - cetaceans

KW - Scotland

KW - mammals

KW - fundy

U2 - 10.1017/S0025315407052721

DO - 10.1017/S0025315407052721

M3 - Article

VL - 87

SP - 327

EP - 338

JO - Journal of the Marine Biological Association of the United Kingdom

JF - Journal of the Marine Biological Association of the United Kingdom

SN - 0025-3154

IS - 1

ER -