Spatial and temporal distribution of North Atlantic right whales (Eubalaena glacialis) in Cape Cod Bay, and implications for management

Nichols, Owen C. and Kenney, Robert D. and Brown, Moira W. (2008) Spatial and temporal distribution of North Atlantic right whales (Eubalaena glacialis) in Cape Cod Bay, and implications for management. Fishery Bulletin, 106(3), pp. 270-280.

[img] PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (2806Kb)
Official URL: http://fishbull.noaa.gov/1063/nichols.pdf

Abstract

Cape Cod Bay (Massachusetts) is the only known winter and early spring feeding area for concentrations of the endangered North Atlantic right whale (Eubalaena glacialis) population. During January–May, 1998–2002, 167 aerial surveys were conducted (66,466 km of total survey effort), providing a complete representation of the spatiotemporal distribution of right whales in the bay during winter and spring. A total of 1553 right whales were sighted; some of these sightings were multiple sightings of the same individuals. Right whale distribution and relative abundance patterns were quantified as sightings per unit of effort (SPUE) and partitioned into 103 23-km2 cells and 12 2-week periods. Significant interannual variations in mean SPUE and timing of SPUE maxima were likely due to physically forced changes in available food resources. The area of greatest SPUE expanded and contracted during the season but its center remained in the eastern bay. Most cells with SPUE>0 were inside the federal critical habitat (CH) and this finding gave evidence of the need for management measures within CH boundaries to reduce anthropogenic mortality from vessel strikes and entanglement. There was significant within-season SPUE variability: low in December−January, increasing to a maximum in late February−early April, and declining to zero in May; and these results provide support for management measures from 1 January

Item Type: Article
Title: Spatial and temporal distribution of North Atlantic right whales (Eubalaena glacialis) in Cape Cod Bay, and implications for management
Personal Creator/Author:
CreatorsEmail
Nichols, Owen C.
Kenney, Robert D.
Brown, Moira W.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 106
Number: 3
Page Range: pp. 270-280
Date: 2008
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8831
Depositing User: Patti M. Marraro
Date Deposited: 12 Jun 2012 17:54
Last Modified: 12 Jun 2012 17:54
URI: http://aquaticcommons.org/id/eprint/8831

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...