Results 161 to 170 of about 4,342 (214)
Some of the next articles are maybe not open access.
Narwhals require targeted conservation
Science, 2020Narwhals are one of three highly specialized whale species that are endemic to the Arctic ([ 1 ][1]). The global narwhal population may number more than 100,000 individuals, but the species persists as a complex, highly divided meta-population, with limited or no exchange between neighboring subpopulations ([ 1 ][1]).
M P, Heide-Jørgensen +9 more
openaire +2 more sources
The Spiral in the Tusk of the Narwhal
ARCTIC, 1988The spiral in the tusk of the narwhal has been fancifully, but never satisfactorily, explained. Spiral growths are common in the animal kingdom and share the feature of having straight axes. A curved tusk would hinder the narwhal swimming; a spiral mode of growth ensures overall straightness even if the tusk grows irregularly. The need to keep the tusk
Michael C.S. Kingsley, Malcolm A. Ramsay
openaire +1 more source
Science, 2017
Ecophysiology![Figure][1] An adult male narwhal preparing to dive in Scoresby Sound, Greenland CREDIT: TERRIE M. WILLIAMS Animals tend to respond to threats with the well-known behaviors of fight, flee, or freeze, each of which requires a different suite of physiological responses ...
openaire +1 more source
Ecophysiology![Figure][1] An adult male narwhal preparing to dive in Scoresby Sound, Greenland CREDIT: TERRIE M. WILLIAMS Animals tend to respond to threats with the well-known behaviors of fight, flee, or freeze, each of which requires a different suite of physiological responses ...
openaire +1 more source
Chirality, diastereoisomerism, and the Narwhal
Journal of Chemical Education, 1978There are many simple examples of enantiomeric objects, both natural and man-made and their static interrelationship is directly and tellingly examined with the aid of a mirror.
openaire +1 more source
1990
The hypothesis that some odontocetes use their sonar not only to find prey, but also to debilitate it (Norris and Mohl, 1983) requires that odontocetes produce sound pressures in excess of 230 dB re. 1 μPa (Zaegaesky, 1987; Hubbs and Rechnitzer, 1972).
Bertel Møhl +2 more
openaire +1 more source
The hypothesis that some odontocetes use their sonar not only to find prey, but also to debilitate it (Norris and Mohl, 1983) requires that odontocetes produce sound pressures in excess of 230 dB re. 1 μPa (Zaegaesky, 1987; Hubbs and Rechnitzer, 1972).
Bertel Møhl +2 more
openaire +1 more source
Ploughshares
Abstract: The Spring 2025 Issue. Ploughshares is an award-winning journal of new writing. Since 1971, Ploughshares has discovered and cultivated the freshest voices in contemporary American literature, and now provides readers with thoughtful and entertaining literature in a variety of formats.
openaire +1 more source
Abstract: The Spring 2025 Issue. Ploughshares is an award-winning journal of new writing. Since 1971, Ploughshares has discovered and cultivated the freshest voices in contemporary American literature, and now provides readers with thoughtful and entertaining literature in a variety of formats.
openaire +1 more source