منابع مشابه
Magnetic declination stops migratory birds getting lost at sea
In the 1700s, scientists, sailors, engineers and explorers were trying to work out how to navigate east to west at sea. The stakes were high; many lives were lost because sailors could not reliably measure longitude. Eventually, the invention of accurate timepieces allowed sailors to use the time in their current location, and the time at a fixed reference, to calculate longitude. But how do lo...
متن کاملSearch for a rendezvous with lost target at sea
This paper addresses the search problem for lost floating targets on sea surface. Given the expected search region, we analyze spiral search patterns for finding the target. Specifically, we consider two search patterns: outward spiral and inward spiral. The outward spiral pattern is a greedy strategy which initializes from the mean of the search region and expands outwards to cover the entire ...
متن کاملLost at sea: genetic, oceanographic and meteorological evidence for storm-forced dispersal.
For many species, there is broad-scale dispersal of juvenile stages and/or long-distance migration of individuals and hence the processes that drive these various wide-ranging movements have important life-history consequences. Sea turtles are one of these paradigmatic long-distance travellers, with hatchlings thought to be dispersed by ocean currents and adults often shuttling between distant ...
متن کاملLost at sea: ocean acidification undermines larval fish orientation via altered hearing and marine soundscape modification.
The dispersal of larvae and their settlement to suitable habitat is fundamental to the replenishment of marine populations and the communities in which they live. Sound plays an important role in this process because for larvae of various species, it acts as an orientational cue towards suitable settlement habitat. Because marine sounds are largely of biological origin, they not only carry info...
متن کاملLost Baryons at Low Redshift
We review our attempts to discover lost baryons at low redshift with “X-ray forest” of absorption lines from the warm-hot intergalactic medium. We discuss the best evidence to date along the Mrk 421 sightline. We then discuss the missing baryons in the Local Group and the significance of the z=0 absorption systems in X-ray spectra. We argue that the debate over the Galactic vs. extragalactic or...
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ژورنال
عنوان ژورنال: Nature
سال: 1991
ISSN: 0028-0836,1476-4687
DOI: 10.1038/354260c0