Abundance and distribution of the common dolphin (Delphinus delphis) in the north of the Iberian Peninsula
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AuthorsSaavedra, C. (Camilo); Gerrodette, T. (Tim); Louzao-Arsuaga, M. (Maite); Valeiras, J. (Julio); García-Barcelona, S. (Salvador); Murcia, J.L. (José Luis); Cerviño, S. (Santiago); Pierce, G.J. (Graham John); Santos, M.B. (María Begoña)
Common dolphin s ( Delphinus delphis ) are one of the most abundant species of small cetacean in Northeast Atlantic Ocean and the most abundant in Atlantic shelf waters of the Iberian Peninsula. However, the abundance , distribution and population trends in the recen t years of this species are poorly known , but such information is needed to develop population dynamic models . Thus far, the only absolute abundance estimate in the shelf Atlantic waters of the Iberian Peninsula was obtained in 2005 during the SCANS - II survey. Along the north and northwest coast s of the Iberian Peninsula , t he Spanish Institute of Oceanography has carried out annual acoustic survey s to estimate pelagic fish biomass for the last two decades. Since 2007 , an observer program for top predators has been integrated in to these survey s , collecting sightings on cetaceans, ...
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