Abstract: So. Range of Spinner Dolphins

Michael Williamson (whe_william@flo.org)
Mon, 2 Oct 1995 08:43:59

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From: Michael Williamson <WHE_WILLIAM@FLO.ORG>
Subject: Abstract: So. Range of Spinner Dolphins
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Subj:	abstract - spinner dolphins
 
Date:         Thu, 28 Sep 1995 11:58:11 EST
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     Earlier this week, you received the following post.  I have been asked
     by the editor of Aquatic Mammals to work up an abstract/summary for
     the article, since one was not published with it.
     ******
 
     As a courtesy, the following is a summary of an article recently
     published in Aquatic Mammals 21(2).  Apologies for cross-mailing to
     those folks that subscribe to both discussion groups.  I have supplied
     the author's address to which reprint requests should be directed.
     Aquatic Mammals is published three times a year by the European
     Association for Aquatic Mammals.  Subscription requests should be
     directed to the editor:  Paul Nachtigall, Hawaii Institute of Marine
     biology, P.O. Box 1106, Kailua, HI 96734, USA.  FAX (808) 247-5831,
     email:  nachtig@nosc.mil
 
     __________________________________________________________________
 
     *Secchi, E.R. and S. Siciliano.  1995.  Comments on the southern range
     of the spinner dolphin (Stenella longirostris) in the Western South
     Atlantic.  Aquatic Mammals 21(2): 105-108.
 
     (*Museu Oceanografico 'Prof. Eliezer de Carvalho Rios' CP 379 Rio
     Grande, RS, 96200-970, Brazil)
 
 
     Spinner dolphins, Stenella longirostris, are found in tropical,
     subtropical and, less frequently, warm temperate waters, but very
     little is still known about their distribution in the South Atlantic
     Ocean.  Information about sightings of cetaceans was obtained from
     August 1987 to August 1991 during nine cruises aboard tuna longlining
     vessels.  These vessels operate regularly seaward of the southern
     Brazil slope (between 26 and 35 degrees S) from March to Novemeber.  A
     confirmed observation of S. longirostris as far south as Parana State
     (25 35'S) leads us to suggest that, in the Southwest Atlantic, the
     movements of spinner dolphins southward may be influenced by the warm
     Brail Current.  Spinner dolphins may feed in the same feeding grounds
     of tuna and tuna-like fishes, using the influence of the Brazil
     Current to disperse themselves away from more tropical regions,
     without incurring great heat losses and thus, minimizing energy
     expenditure.