USGS at The Wildlife Society: From sea-ice change to contaminants to predators and prey

ing habitat of harbor seals relative to cruise ship routes in Glacier Bay National Park.

Glacier Bay National Park has historically supported one of the largest populations of breeding harbor seals in Alaska. However, the number of seals has declined by nearly 15 percent per year since 1992. During the same period, the number of cruise ships that have entered the park has increased by 25 percent and may increase up to another 30%. Although the park has initiated restrictions on cruise ships to minimize disturbance of seals at important breeding locations (including terrestrial and ice haul-outs), the extent of overlap between important foraging habitat of seals and areas used by cruise ships was unknown. This study identified foraging areas used by seals, and compared fish densities in these areas with areas used by cruise ships. For two years, researchers tagged 46 seals, and observed the behavior of 36 of them by observing their foraging behavior on 74 occasions. Seals using terrestrial haul-outs foraged predominantly in nearshore habitats within 3.1 miles of haul-outs. Seals captured in ice habitats likewise foraged nearshore but traveled farther from haul-outs to forage (range 0-63 miles). Only 11 percent of foraging bouts of seals observed by researchers were within areas used by cruise ships, and fewer than 17 percent of all foraging bouts were within 1.2 miles of ship routes. Furthermore, after accounting for differences in water temperature, depth, and distance to haul-out, prey densities (including forage fish) from mid-water trawls were similar in areas where seals foraged outside of cruise ship routes compared to areas within cruise ship routes. These results suggest that forging locations of harbor seals were a function of choice, rather than displacement. Foraging habitat of seals appears to be sufficiently protected from cruise ship disturbance, although the effects of other vessel classes on foraging seals is yet unknown. Scott Gende an

Contact: Catherine Puckett
United States Geological Survey

Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Related biology news :

1. World Wildlife Fund warns against iron dumping experiment near the Galapagos Islands
2. The Institute of Ecosystem Studies recognized by the Wildlife Society
3. Urban Wildlife Management book something to crow about
4. Scientists: Wildlife corridors benefit plant biodiversity, native plants
5. Wildlife Conservation Society joins Climate, Community & Biodiversity Alliance
6. Wildlife conservation and energy devt study seeks balance in Rockies
7. Wildlife researchers identify impacts of contamination in amphibians
8. Wildlife professor updates best available science on Florida panther
9. Injured whooping crane recovering at USGS Patuxent Wildlife Research Center
10. Climate change isolates Rocky Mountain butterflies
11. Climate change and permafrost thaw alter greenhouse gas emissions in northern wetlands

Post Your Comments:

(Date:1/7/2020)... ... January 06, 2020 , ... Myant Inc. , the pioneers in Textile ... bring to life its vision of a world where textile-based interfaces knitted into everyday ... digital sphere, and the physical IoT-enabled environment. The experience at Myant’s booth will challenge ...
(Date:12/30/2019)... ... 30, 2019 , ... Cure Now ? Instead of Palliative ... is the 6th leading cause of death in the United States. , ... other dementia. ,     These caregivers provided an estimated 18.5 billion hours of ...
(Date:12/21/2019)... ... ... The City of Tampa recently served as the host location of the ... Tampa welcomed these most-highly decorated USA heroes as the National Hockey League (NHL), The ... members. , The Medal of Honor, the USA military’s highest award for valor in ...
Breaking Biology News(10 mins):
(Date:12/27/2019)... ... December 27, 2019 , ... ... leak testing instruments for the Pharmaceutical, Biotechnology, Medical Device and Food Packaging Industries ... new management . Following acquisition by CLJ Holdings in February, 2019, a comprehensive ...
(Date:12/18/2019)... (PRWEB) , ... December 17, 2019 , ... ... LLP is pleased to announce that it has hired Dr. Alia Orbin, ... , Orbin is experienced in the preparation, filing and prosecution of patent applications ...
(Date:12/4/2019)... ... , ... A new survey by MedReps ( http://www.medreps.com ), a career site ... medical sales companies to work for in 2020. , The 9th Annual ... the MedReps community to identify which medical sales companies are currently the most sought-after ...
(Date:12/4/2019)... ... December 04, 2019 , ... Improved Pharma’s analytical ... amorphous materials. Additionally, their PDF Synchrotron methods provide a way to determine the ... both in regulatory and patent applications.  , The latest developments were recently shared ...
Breaking Biology Technology:
Cached News: