[MARMAM] New paper on bottlenose dolphins

Ibiza Martinez-Serrano ibimarse at gmail.com
Wed Dec 14 07:39:24 PST 2011


Please post the following message:

Dear colleagues,

I am pleased to inform you we recently published a paper on home range and
distribution of bottlenose dolphins (*Tursiops truncatus*).

*I Martínez-Serrano, A Serrano*, G Heckel, Y Schramm.2011. Distribution and
home range of bottlenose dolphins (Tursiops truncatus) off Veracruz,
Mexico. Ciencias Marinas 37(4A): 379––392*

You can ask for PDF copies to ibimarse at gmail.com or download it directly
from the Journal webpage:

http://www.cienciasmarinas.com/index.php/cmarinas/index

*ABSTRACT*

With the goal of gathering ecological data in order to develop future
cetacean management and conservation plans, the distribution, home range
(HR) and residency of bottlenose dolphins (*Tursiops truncatus*) were
studied in the central-north Mexican Gulf of Mexico (21°35’ N, 97°19’ W and
20°08’ N, 96°40’ W). Between July 2005 and June 2008, 59 boat surveys were
carried out for a total of 313 h of effort at sea. During these surveys,
471 individuals were observed in 88 different groups. Photographs of
naturally marked animals resulted in 275 different individuals
photo-identified. Their distribution was homogeneous throughout the study
site at a mean distance from coast of 2.5 km (SD = 2.9,  *n* = 471) and
depths below 20 m. Of the total of dolphins identified, 202 (73%) had a low
sighting rate and were considered transients, whereas 34 individuals (12%)
with medium and high sighting rates were considered resident animals. Home
range estimates using the minimum convex polygon method showed a mean of
2771 ±1116 km2. Using the adaptive kernel method, the average size of home
range was 1199 ± 143 km2, with five core areas identified. These areas
decreased in size during rainy season because dolphins remained close to
the rivers’ plumes. At individual level, the mean home range was 129.2 km2 (
*n *= 66), according to other reports from Texas and Florida in spite of
the habitat differences. The main component determining the size of the
home range in this area was the presence of rivers, rather than the
geomorphology of the coast.


Key words: Distribution;* *Gulf of Mexico; home range; *Tursiops truncatus*;
Veracruz.


I hope you find the work helpful.

-- 
Dra. Ibiza Martínez Serrano
PTC Facultad de Biología-Xalapa
Universidad Veracruzana
México
------------------------------------------------------------
**
*"2011 Año Internacional de los Bosques"*
*Reporta incendios forestales al: 0180046236346*
Considera si realmente es necesario imprimir este correo....




-- 
Dra. Ibiza Martínez Serrano
PTC Facultad de Biología-Xalapa
Universidad Veracruzana
------------------------------------------------------------
**
*"2011 Año Internacional de los Bosques"*
*Reporta incendios forestales al: 0180046236346*
Considera si realmente es necesario imprimir este correo....
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