INVESTIGADORES
QUINTANA Flavio Roberto
capítulos de libros
Título:
Three-Dimensional Diving Behavior of a South American Sea Lion (Otaria flavescens)
Autor/es:
GABRIELE MÜLLER; RORY P. WILSON; FLAVIO QUINTANA; CLAUDIO CAMPAGNA
Libro:
Sea Lions of the World
Editorial:
Alaska Sea Grant College Program
Referencias:
Año: 2006; p. 255 - 269
Resumen:
Even though the use of time-depth-recorders (TDRs) has dramatically
increased knowledge about pinniped diving behavior, recent studies have
shown the limitations of two-dimensional plots of time and depth in interpretation
of animal activity. Recently, new technologies have become
available allowing collection of more dive parameters so that dives can be
depicted in three dimensions. This study uses information collected by
a multiple-channel dead reckoner (tracking recorder) to provide detailed
information on movements in space of a male South American sea lion
(Otaria flavescens) in Patagonia, Argentina. The information was analyzed
using an area-interest-index (AII), which reflects the directionality
of movement. The AII was calculated for a complete foraging trip where
the middle part showed the highest values, indicative of foraging activity.
Activity estimations based on three-dimensional dive profiles (four
dimensions with speed) showed good agreement with the calculated AII.
The use of the AII is thus a promising tool for the determination of activity
of marine animals over varying spatial scales.
using an area-interest-index (AII), which reflects the directionality
of movement. The AII was calculated for a complete foraging trip where
the middle part showed the highest values, indicative of foraging activity.
Activity estimations based on three-dimensional dive profiles (four
dimensions with speed) showed good agreement with the calculated AII.
The use of the AII is thus a promising tool for the determination of activity
of marine animals over varying spatial scales.
using an area-interest-index (AII), which reflects the directionality
of movement. The AII was calculated for a complete foraging trip where
the middle part showed the highest values, indicative of foraging activity.
Activity estimations based on three-dimensional dive profiles (four
dimensions with speed) showed good agreement with the calculated AII.
The use of the AII is thus a promising tool for the determination of activity
of marine animals over varying spatial scales.
using an area-interest-index (AII), which reflects the directionality
of movement. The AII was calculated for a complete foraging trip where
the middle part showed the highest values, indicative of foraging activity.
Activity estimations based on three-dimensional dive profiles (four
dimensions with speed) showed good agreement with the calculated AII.
The use of the AII is thus a promising tool for the determination of activity
of marine animals over varying spatial scales.
Otaria flavescens) in Patagonia, Argentina. The information was analyzed
using an area-interest-index (AII), which reflects the directionality
of movement. The AII was calculated for a complete foraging trip where
the middle part showed the highest values, indicative of foraging activity.
Activity estimations based on three-dimensional dive profiles (four
dimensions with speed) showed good agreement with the calculated AII.
The use of the AII is thus a promising tool for the determination of activity
of marine animals over varying spatial scales.
