Passive acoustic survey of Yangtze finless porpoises using a cargo ship as a moving platform

2011 ◽  
Vol 130 (4) ◽  
pp. 2285-2292 ◽  
Author(s):  
Lijun Dong ◽  
Ding Wang ◽  
Kexiong Wang ◽  
Songhai Li ◽  
Shouyue Dong ◽  
...  
Keyword(s):  
Acoustic Survey ◽  
Moving Platform ◽  
Passive Acoustic

scholarly journals Confirmation of right whales near a nineteenth-century whaling ground east of southern Greenland

2011 ◽  
Vol 7 (3) ◽  
pp. 411-413 ◽  
Author(s):  
David K. Mellinger ◽  
Sharon L. Nieukirk ◽  
Karolin Klinck ◽  
Holger Klinck ◽  
Robert P. Dziak ◽  
...  
Keyword(s):  
Nineteenth Century ◽  
North Atlantic ◽  
Eubalaena Glacialis ◽  
Acoustic Survey ◽  
Temporal Separation ◽  
Right Whale ◽  
Right Whales ◽  
North Atlantic Right Whales ◽  
Passive Acoustic

North Atlantic right whales ( Eubalaena glacialis ) were found in an important nineteenth century whaling area east of southern Greenland, from which they were once thought to have been extirpated. In 2007–2008, a 1-year passive acoustic survey was conducted at five sites in and near the ‘Cape Farewell Ground’, the former whaling ground. Over 2000 right whale calls were recorded at these sites, primarily during July–November. Most calls were northwest of the historic ground, suggesting a broader range in this region than previously known. Geographical and temporal separation of calls confirms use of this area by multiple animals.

Passive acoustic survey of bowhead whales in the Chukchi Sea.

2009 ◽  
Vol 125 (4) ◽  
pp. 2549-2549
Author(s):  
Julien Delarue ◽  
Marjo Laurinolli ◽  
Bruce Martin
Keyword(s):  
Chukchi Sea ◽  
Acoustic Survey ◽  
Bowhead Whales ◽  
Passive Acoustic

Spatiotemporal distribution of foraging in a marine predator: behavioural drivers of hotspot formation

2020 ◽  
Vol 635 ◽  
pp. 187-202
Author(s):  
T Brough ◽  
W Rayment ◽  
E Slooten ◽  
S Dawson
Keyword(s):  
Time Of Day ◽  
Spatiotemporal Distribution ◽  
Temporal Effects ◽  
Marine Predator ◽  
Marine Predators ◽  
Additive Mixed Models ◽  
Density Analysis ◽  
The Times ◽  
Passive Acoustic ◽  
Spatial Locations

Many species of marine predators display defined hotspots in their distribution, although the reasons why this happens are not well understood in some species. Understanding whether hotspots are used for certain behaviours provides insights into the importance of these areas for the predators’ ecology and population viability. In this study, we investigated the spatiotemporal distribution of foraging behaviour in Hector’s dolphin Cephalorhynchus hectori, a small, endangered species from New Zealand. Passive acoustic monitoring of foraging ‘buzzes’ was carried out at 4 hotspots and 6 lower-use, ‘reference areas’, chosen randomly based on a previous density analysis of visual sightings. The distribution of buzzes was modelled among spatial locations and on 3 temporal scales (season, time of day, tidal state) with generalised additive mixed models using 82000 h of monitoring data. Foraging rates were significantly influenced by all 3 temporal effects, with substantial variation in the importance and nature of each effect among locations. The complexity of the temporal effects on foraging is likely due to the patchy nature of prey distributions and shows how foraging is highly variable at fine scales. Foraging rates were highest at the hotspots, suggesting that feeding opportunities shape fine-scale distribution in Hector’s dolphin. Foraging can be disrupted by anthropogenic influences. Thus, information from this study can be used to manage threats to this vital behaviour in the locations and at the times where it is most prevalent.

Acoustic survey of the Symplectoteuthis oualaniensis resources in the South China Sea based on light falling-net

2013 ◽  
Vol 37 (7) ◽  
pp. 1032
Author(s):  
Quan YANG ◽  
Yongzhen LI ◽  
Peng ZHANG ◽  
Yong TANG ◽  
Guobao CHEN ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
Acoustic Survey ◽  
The South ◽  
China Sea
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