Acoustical Scattering, Propagation, and Attenuation Caused by Two Abundant Pacific Schooling Species: Humboldt Squid and Hake

15: Acoustical Scattering, Propagation, and Attenuation Caused by Two Abundant Pacific Schooling Species: Humboldt Squid and Hake

Invasive range expansion by the Humboldt squid, Dosidicus gigas, in the eastern North Pacific.

A unique 16-year time series of deep video surveys in Monterey Bay reveals that the Humboldt squid, Dosidicus gigas, has substantially expanded its perennial geographic range in the eastern North Pacific by invading the waters off central California. This sustained range expansion coincides with changes in climate-linked oceanographic conditions and a reduction in competing top predators. It is...

Food Habits of Some Commercially Important Groundfish off the Coasts

This report describes the food habits of some commercially important groundfish collected off the coasts of California, Oregon, Washington, and British Columbia. Generally, the groundfish reported on were sampled during three cruises the triennial groundfish survey of 1989 and the continental slope surveys of 1991 and 1992. Some young-of-the-year Pacific hake (also known as Pacific whiting, Mer...

Humboldt expansion

produce. I am, of course, talking about 'the correlation of parts', 'developmental constraints', 'mutational bias', the 'integration of development with evolution', 'the real reason pigs can't fly' — every generation since Darwin has considered, and failed to solve, the problem, though they've usually given it a new name. The second question is rather like the first: can we predict the course o...

Stepping of the forelegs over obstacles establishes long-lasting memories in cats

its historical range extends along the subtropical coasts of both North and South America with only occasional and temporary appearances at latitudes higher than 40 degrees. The squid feed opportunistically on a broad range of surface and deepwater fish, crustaceans and squid, many of which undertake vertical daily migrations of several hundred metres pursued through these depths by the Humbold...