Living resources of the sea and fresh water have long been an important source of food and
economic activity. With fish stocks continuing to be over-exploited, there is a clear focus on …

Sound is the most effective medium with which to perceive the marine environment, as
evidenced from the evolution of écholocation in cetaceans developed over millions of years …

Autonomous underwater vehicles (AUVs) are unmanned submersibles that can be pre-
programmed to navigate in three dimensions under water. The technological advances …

The oceans are a hostile environment, and gathering information on deep-sea life and the
seabed is incredibly difficult. Autonomous underwater vehicles are robot submarines that …

High-frequency acoustic scattering techniques have been used to investigate dominant
scatterers in mixed zooplankton populations. Volume backscattering was measured in the …

We evaluated the feasibility of identifying major acoustic scatters in North Pacific ecosystems
based on empirical measurements of relative frequency response. Acoustic measurements …

Calibrated and digitized data from two or more discrete echosounder frequencies can be
combined for the purpose of separating and extracting the acoustic scattering from …

Ten-month time series of mean volume backscattering strength (MVBS) and vertical velocity
obtained from three moored acoustic Doppler current profilers (ADCPs) deployed from …

How predators find, select and capture prey is central to understanding trophic cascades
and ecosystem structure. But despite advances in biologging technology, obtaining in situ …

Nature 404, 35–36 (2000) Our title has led some readers to misinterpret our conclusions.
Questions have also been raised regarding the speed at which the observations were …