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Occurrence, distribution and abundance of cetaceans in Onslow Bay, North Carolina, USA

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RS3608_JCRM_14_Full_copy.pdf_14_pp023_036_Read.pdf (1.431Mb)
Date
2014
Author
Read, Andrew, J.
Barco, S.
Bell, J.
Borchers, David Louis
Burt, M Louise
Cummings, E.W.
Dunn, J.
Fougeres, J.
Hazen, L.
Williams-Hodge, L.E.
Laura, A-M.
McAlarney, R.J.
Nilsson, P.
Pabst, D.A.
Paxton, Charles G. M.
Schneider, S.Z.
Urian, Kim
Waples, D.M.
McLellan, W.A.
Keywords
Abundance estimate
Monitoring
Survey-combined
Trends
Photo-ID
GB Physical geography
QA Mathematics
QH301 Biology
Metadata
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Abstract
In this paper the occurrence, distribution and abundance of cetaceans in offshore waters of Onslow Bay, North Carolina, USA is described. Between June 2007 and June 2010 monthly aerial and shipboard line-transect surveys were conducted along ten 74km transects placed perpendicular to the shelf break. In total 42,676km of aerial trackline (218 sightings) and 5,209km of vessel trackline (100 sightings) were observed. Seven species of cetaceans were observed, but the fauna was dominated strongly by common bottlenose and Atlantic spotted dolphins. Both species were present year-round in the study area. Using photo-identification techniques, five bottlenose dolphins and one spotted dolphin were resighted during the three-year period. In general, the abundance of cetaceans in Onslow Bay was low and too few sightings were made to estimate monthly abundances for species other than bottlenose and spotted dolphins. Maximum monthly abundances of bottlenose and spotted dolphins were 4,100 (95% CI: 1,300–9,400) in May 2010 and 6,000 (95% CI: 2,500–17,400) in March 2009, respectively. Bottlenose dolphins were found throughout the study area, although they were encountered most frequently just off the shelf break. In contrast, spotted dolphins exhibited a strong preference for waters over the continental shelf and were not encountered beyond the shelf break.
Citation
Read , A J , Barco , S , Bell , J , Borchers , D L , Burt , M L , Cummings , E W , Dunn , J , Fougeres , J , Hazen , L , Williams-Hodge , L E , Laura , A-M , McAlarney , R J , Nilsson , P , Pabst , D A , Paxton , C G M , Schneider , S Z , Urian , K , Waples , D M & McLellan , W A 2014 , ' Occurrence, distribution and abundance of cetaceans in Onslow Bay, North Carolina, USA ' , Journal of Cetacean Research and Management , vol. 14 , pp. 23-35 .
Publication
Journal of Cetacean Research and Management
Status
Peer reviewed
ISSN
1561-0713
Type
Journal article
Rights
Copyright The Authors 2014. Occurrence, distribution and abundance of cetaceans in Onslow Bay, North Carolina, USA, Read, A. J., Barco, S., Bell, J., Borchers, D. L., Burt, M. L., Cummings, E. W., Dunn, J., Fougeres, J., Hazen, L., Williams-Hodge, L. E., Laura, A-M., McAlarney, R. J., Nilsson, P., Pabst, D. A., Paxton, C. G. M., Schneider, S. Z., Urian, K., Waples, D. M. & McLellan, W. A. 2014 In : Journal of Cetacean Research and Management. 14, p. 23-35. Deposited in accordance with the journal not-for-profit open access policy.
Collections
  • Centre for Research into Ecological & Environmental Modelling (CREEM) Research
  • Mathematics & Statistics Research
  • Scottish Oceans Institute Research
  • St Andrews Sustainability Institute Research
  • University of St Andrews Research
URL
https://archive.iwc.int/pages/preview.php?ref=3608&alternative=2475&k=&search=onslow%2C+bay%2C+year%3A2014&offset=0&order_by=relevance&sort=DESC&archive=0&
URI
http://hdl.handle.net/10023/7772

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