Distribution, abundance and seasonality of cetaceans sighted during scheduled ferry crossings in the central Tyrrhenian Sea: 1989–1992
作者:
Luca Marini,
Carlo Consiglio,
AnnaMaria Angradi,
Barbara Catalano,
Andrea Sanna,
Tiziana Valentini,
MariaGrazia Finoia,
Germana Villetti,
期刊:
Italian Journal of Zoology
(Taylor Available online 1996)
卷期:
Volume 63,
issue 4
页码: 381-388
ISSN:1125-0003
年代: 1996
DOI:10.1080/11250009609356163
出版商: Taylor & Francis Group
关键词: Cetacean;Ecology;Migration
数据来源: Taylor
摘要:
The results of a medium‐term survey of cetaceans in the central Tyrrhenian Sea, the first ever all‐year‐round one to be made in the Mediterranean, are reported. Individuals ofBalaenopterasp. were sighted throughout the year, although with significant seasonal differences, in agreement with the hypothesis of a resident population making seasonal migrations around, but remaining inside the Mediterranean Sea. Striped dolphins (Stenella coeruleoalba), the most frequently observed species, are present all year round with no significant seasonal differences. Some observations on the presence and group structure of bottlenose dolphins (Tursiops truncatus) and Cuvier's beaked whale (Ziphius cavirostris) are reported. Individuals of four other species (Physeter macrocephalus, Grampus griseus, Globicephala melaenaandDelphinus delphis) were also sighted.
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