scholarly journals Fine-scale behaviour of bottlenose dolphins around gillnets

Author(s):  
Andrew J. Read ◽  
Danielle M. Waples ◽  
Kim W. Urian ◽  
Dave Swanner
2011 ◽  
Vol 14 (4) ◽  
pp. 342-353 ◽  
Author(s):  
L. Mirimin ◽  
R. Miller ◽  
E. Dillane ◽  
S. D. Berrow ◽  
S. Ingram ◽  
...  

2007 ◽  
Vol 41 (21) ◽  
pp. 7222-7228 ◽  
Author(s):  
Jenny A. Litz ◽  
Lance P. Garrison ◽  
Lynne A. Fieber ◽  
Anthony Martinez ◽  
Joseph P. Contillo ◽  
...  

2003 ◽  
Vol 81 (3) ◽  
pp. 469-478 ◽  
Author(s):  
Gordon D Hastie ◽  
Ben Wilson ◽  
Paul M Thompson

Cetacean distribution and underwater topography are frequently correlated. These patterns are commonly studied on large spatial scales, over tens of kilometres, but very rarely on a fine scale. Sightings of bottlenose dolphins, Tursiops truncatus, within the Moray Firth, Scotland, were previously found to be concentrated within deep, narrow channels. To understand why such areas were selected, more-detailed information on the distribution of dolphins was required. This study describes the development of a video technique to study the spatial distribution and relative abundance of bottlenose dolphins. We then used the methodology to investigate whether water depth and seabed gradient influence the dolphins' distribution patterns. Furthermore, temporal patterns of use were examined with respect to seasonal, tidal, and diurnal cycles. The distribution of dolphins was significantly related to topography: dolphins were sighted most frequently in the deepest regions with the steepest seabed gradients. There was a clear temporal pattern in the use of the area, with sightings peaking during July. However, the presence of dolphins was not significantly related to tidal or diurnal cycles. The topography of the area appears to be a significant influence on its intensive use by dolphins, and patterns of use indicate that topography may facilitate foraging during seasonal migrations of fish.


2010 ◽  
Vol 83 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Mai Sakai ◽  
Tadamichi Morisaka ◽  
Kazunobu Kogi ◽  
Toru Hishii ◽  
Shiro Kohshima

Hydrobiologia ◽  
2011 ◽  
Vol 670 (1) ◽  
pp. 111-125 ◽  
Author(s):  
Ruth Fernández ◽  
M. Begoña Santos ◽  
Graham J. Pierce ◽  
Ángela Llavona ◽  
Alfredo López ◽  
...  

2009 ◽  
Vol 25 (3) ◽  
pp. 619-638 ◽  
Author(s):  
Kim W. Urian ◽  
Sue Hofmann ◽  
Randall S. Wells ◽  
Andrew J. Read

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