Results 101 to 110 of about 20,413 (204)

Distribution and density of harbour popoises in Dutch North Sea waters [PDF]

open access: yes, 2009
Aerial surveys were conducted to investigate harbour porpoise density and distribution in Dutch waters. Surveys were conducted following standard line transect distance sampling methodology on tracklines providing a representative coverage of the study ...
Scheidat, M., Verdaat, J.P.
core   +1 more source

Negative long term effects on harbour porpoises from a large scale offshore wind farm in the Baltic—evidence of slow recovery

open access: yesEnvironmental Research Letters, 2012
Offshore wind farms constitute a new and fast growing industry all over the world. This study investigates the long term impact on harbour porpoises, Phocoena phocoena , for more than 10 years (2001–12) from the first large scale offshore wind farm in ...
Jonas Teilmann, Jacob Carstensen
doaj   +1 more source

Historic and Current Use of Lower Cook Inlet, Alaska, by Belugas, Delphinapterus leucas [PDF]

open access: yes, 2000
Dedicated at-sea surveys for marine birds and mammals conducted in lower Cook Inlet in late July and early August from 1995–99 failed to locate any belugas, Delphinapterus leucas.
Piatt, John F., Speckman, Suzann G.
core  

Time and tide: Seasonal, diel and tidal rhythms in Wadden Sea Harbour porpoises (Phocoena phocoena).

open access: yesPLoS ONE, 2019
Odontocetes have evolved a rich diversity of prey- and habitat-specific foraging strategies, which allows them to feed opportunistically on locally and temporally abundant prey.
Beate Zein   +8 more
doaj   +1 more source

Synthetic communication signals influence wild harbour porpoise (Phocoena phocoena) behaviour [PDF]

open access: yes, 2015
We used our novel and programmable Porpoise Alarm (PAL, patd.) to synthesize life-like, electronic harbour porpoise communication signals based on those described for captive animals.
Conrad, Matthias   +3 more
core   +1 more source

Aircraft/island/ship/satellite intercomparison: Preliminary results from July 16, 1987 [PDF]

open access: yes, 1990
The First ISCCP Regional Experiment (FIRE) objective of validating and improving satellite algorithms for inferring cloud properties from satellite radiances was one of the central motivating factors in the design of the specific field experimental ...
Davidson, Ken   +8 more
core   +1 more source

Measures of tuna abundance from purse-seine operations in the Eastern Pacific Ocean, adjusted for fleet-wide evolution of increased fishing power, 1960-1971 [PDF]

open access: yes, 1975
ENGLISH: The fishing power of the tuna purse-seine fleet of the eastern Pacific Ocean has increased since the early 1960's. Because the entire fleet seems to have adopted equipment and techniques to increase its efficiency in capturing tunas, traditional
Pella, Jerome J.   +1 more
core  

Establishing death in stranded Odontocetes (toothed whales) using other mammals : a pilot study : a thesis presented in partial fulfillment of the requirements for the degree of Master of Science in Zoology at Massey University [PDF]

open access: yes, 2003
The aim of this study was to investigate and evaluate a new method for determining death in stranded odontocetes (toothed whales). The new method was using the pulsations seen in the retinal blood vessels in the place of the heart rate. The retinal blood
Paul, Katherine A
core  

Strategic assessment of the magnitude and impacts of sand mining in Poyang Lake, China [PDF]

open access: yes
Planning for the extraction of aggregates is typically dealt with at a case to case basis, without assessing environmental impacts strategically. In this study we assess the impact of sand mining in Poyang Lake, where dredging began in 2001 after sand ...
Boer, W.F., de   +7 more
core   +2 more sources

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