Despite its central position in the Indian Ocean Sanctuary, little is known about offshore cetacean fauna of Maldives. Here we report survey results gathered by R/V Odyssey Maldives during 2003 and 2004 northeast monsoon seasons, provide data on cetaceans from visual acoustic observations. The was conducted over a period 72 days covered 10,915 track line kilometres. main aim to collect biopsy s...

This paper summarises the occurrence of Risso’s dolphin ( Grampus griseus ) over 12 years (2009 to 2021) in northwestern Mediterranean. The study was conducted off central coast Catalonia (NE Spain) an area covering 8,026 km 2 and featuring a system submarine canyons. habitat is suitable for wide diversity species, including deep-diving cetaceans. In addition, different dataset from other proje...

The spectral and temporal properties of echolocation clicks and the use of clicks for species classification are investigated for five species of free-ranging dolphins found offshore of southern California: short-beaked common (Delphinus delphis), long-beaked common (D. capensis), Risso's (Grampus griseus), Pacific white-sided (Lagenorhynchus obliquidens), and bottlenose (Tursiops truncatus) do...

This paper presents a method to detect and classify odontocete echolocation clicks as well as to estimate the number of animals that are vocalizing. A transient detector using the Page test [1-3] is used to extract the clicks: the click time, the click duration, the click amplitude and the spectral information of the clicks are extracted. A probability distribution over the species is assigned ...

To investigate the foraging habitats of delphinids in southeastern Brazil, we analyzed stable carbon (δ(13)C) and nitrogen (δ(15)N) isotopes in muscle samples of the following 10 delphinid species: Sotalia guianensis, Stenella frontalis, Tursiops truncatus, Steno bredanensis, Pseudorca crassidens, Delphinus sp., Lagenodelphis hosei, Stenella attenuata, Stenella longirostris and Grampus griseus....

We used stable carbon (δ13C) and nitrogen (δ15N) isotope analysis to investigate the trophic ecology of 8 small cetacean species of the southwestern South Atlantic Ocean: 6 delphinids (Grampus griseus, Lagenorhynchus cruciger, L. australis, Lissodelphis peronii, Pseudorca crassidens, and Cephalorhynchus commersonii ) and 2 phocoenids (Phocoena dioptrica and P. spinipinnis). We also analyzed sam...

The Risso's dolphin, Grampus griseus, is a deep-sea cetacean with predominantly teuthophagous diet. Its distribution in the northwest Mediterranean generally deeper waters, but there little information on diet or feeding areas. To extend knowledge of G. stomach contents six stranded dolphins Sea were analyzed. A total 578 cephalopod beaks (166 uppers and 392 lowers) found, identified as 386 ind...