Subject: Consult from Venezuela (fwd)

Phil Clapham (
Fri, 08 Jan 1999 15:23:10 -0500


Mike Williamson passed on your message to me.  I suggest you address
this question to Dr Debra Palka of the National Mraine Fisheries
Service; Deb is an expert on transect methodology and density estimation
(among other things).  Her email is

Good luck.

Phil Clapham

Phillip J. Clapham, Ph.D.
Northeast Fisheries Science Center
166 Water Street
Woods Hole, MA 02543

tel (508) 495-2316
fax (508) 495-2066

> Dear Dr. Williamson:
> I write to you from VENEZUELA. I am official of the Service of Fauna of the
> Government of Venezuela (Ministry of the Enviroment and the Renewable
> Natural Resources). At the moment I have been taken charge of continuing
> with an investigation on Cetaceans in the central costs of the country.
> Each month I carry out two trips to estimate the population of the species
> of cetaceans that we are observed. A trip is parallel to the coast, to 1 Km
> of distance of the cost and around 18 Km long. The second trip is
> perpendicular to the coast line and it has 12 Km long.
> For each observed cetacean or group, it registers the species, the quantity
> of individuals, the geographical coordinates (GPS) and the approximate
> distance to the line of sailing of the trip.
> Mainly we have observed groups of dolphins (Stenella frontalis, Tursiops
> truncatus) and some Brady's Whales (Balaenoptera edeni).
> Which formula do you recommend to estimate the populational density of each
> species?
> Much will thank their valuable help and any recommendation or comment that
> you makes me in well of the best knowledge in the cetaceans of Venezuela.
> I am while waiting for their answer, to their pleasing orders, sincerely:
>              Ministerio del Ambiente
>    y los Recursos Naturales Renovables
>                         -----------
> Centro de Investigaci+APM-n y Manejo de Fauna
>                     MANFAUNA