is a moderately large and cosmopolitan dolphin species that lives in deep tropical and warm temperate oceanic waters. Data on its distribution in the Mediterranean are very scarce but sightings seem to indicate that the species prefers the slope, mostly where the slope is closest to the coastline (Notarbartolo di Sciara et al., 1993). There are few studies on the diet of Risso’s dolphin and the...

Excised lungs from eight marine mammal species [harp seal (Pagophilus groenlandicus), harbor seal (Phoca vitulina), gray seal (Halichoerus grypush), Atlantic white-sided dolphin (Lagenorhynchus acutus), common dolphin (Delphinus delphis), Risso's dolphin (Grampus griseus), long-finned pilot whale (Globicephala melas) and harbor porpoise (Phocoena phocoena)] were used to determine the minimum ai...

Yankee whalers of the 19th century had major impacts on populations of large whales, but these leviathans were not the only taxa targeted. Here, we describe the "collateral damage," the opportunistic or targeted taking of nongreat whale species by the American whaling industry. Using data from 5,064 records from 79 whaling logs occurring between 1840 and 1901, we show that Yankee whalers captur...

Von Economo neurons (VENs) are a type of large, layer V spindle-shaped neurons that were previously described in humans, great apes, elephants, and some large-brained cetaceans. Here we report the presence of Von Economo neurons in the anterior cingulate (ACC), anterior insular (AI), and frontopolar (FP) cortices of small odontocetes, including the bottlenose dolphin (Tursiops truncatus), the R...

Small boat surveys were conducted between 2000 and 2003 in three main regions of Oman’s coastal waters: Muscat, the Gulf Masirah Dhofar. Survey data analysed to calculate relative abundances seven most frequently encountered species these areas. These include (in order frequency) bottlenose dolphins (Tursiops sp.), long-beaked common (Delphinus capensis), humpback whales (Megaptera novaeangliae...

Three novel halogenated organic compounds (HOCs) have been identified in the blubber of marine mammals from coastal New England with the molecular formulae C(9)H(3)N(2)Br(6)Cl, C(9)H(3)N(2)Br(7), and C(9)H(4)N(2)Br(5)Cl. They were identified using high and low resolution gas chromatography mass spectrometry (GCMS) and appear to be highly brominated analogues of Q1, a heptachlorinated HOC suspec...

Surveys to assess cetacean presence were conducted in July 1995 and 1997 in the Gulf of Corinth, which is an almost-enclosed sea in Greece, Eastern Mediterranean. The dolphin sighting frequencies were high (0.043 sightings/km). Four dolphin species were encountered: striped dolphins (Stenella coeruleoalba), short-beaked common dolphins (Delphinus delphis), Risso’s dolphins (Grampus griseus) and...

A low-cost, small-boat, rapid assessment survey was conducted on the waters off southern Peninsula of Bali. The objectives were: (1) to conduct an inventory cetacean species in study area; (2) map distribution inform design Badung MPA; (3) estimate relative abundance cetaceans and record information presence other marine megafauna; (4) train observers use distance sampling methods. adopted a “t...

Abstract A variety of cetacean species inhabit the productive waters offshore Washington State, USA. Although general presence many these has been documented in this region, our understanding fine-scale habitat use is limited. Here, passive acoustic monitoring was used to investigate spatial and temporal distributions ten at three locations Washington. Between 2004 2013, a total 2845 days recor...

The Ligurian Sea is one of the most attractive areas for cetaceans in Mediterranean Sea, and now included a Marine Protected Area, Pelagos Sanctuary. Despite lower species diversity than other parts world, because their abundance, are thought to represent significant consumers this ecosystem. Surveys were conducted within Sanctuary from 2001 2004. Densities five species: striped dolphin (Stenel...