Aun asi los estudios en aguas costeras del Pacifico nacional se han concentrado en tres especies: el delfin nariz de botella o bufeo (Tursiops truncatus) (Acevedo-Gutierrez & Burkhart 1998, Cubero-Pardo 1998, Cubero-Pardo 2007, Oviedo 2007, Acevedo-Gutierrez 1999, Acevedo-Gutierrez & Parker 2000, Acevedo-Gutierrez & Stienessen 2004, Palacios-Alfaro 2007), el delfin manchado (Stenella attenuata) (Acevedo-Gutierrez & Burkhart 1998, Cubero-Pardo 1998, May-Collado & Forcada 2001, May-Collado & Morales-Ramirez 2005, Montero-Cordero 2007, Montero-Cordero & Lobo 2010) y la ballena jorobada (Megaptera novaeangliae
) (Steiger et al.
Se registraron a lo largo del ano, diez especies de mamiferos marinos: Megaptera novaeangliae
, Stenella attenuata, S.
(1989) considered saxitoxin vectored by mackerel (Scomber scombrus) as the cause of 14 humpback whale (Megaptera novaeangliae
) mortalities in the Cape Cod Bay area during late 1988 and early 1989.
Most stranded animals that were positive for human interaction showed evidence of having been entangled in fishing gear, particularly bottlenose dolphins, harbor porpoises, short-finned pilot whales (Globicephala macrorhynchus), harbor seals, and humpback whales (Megaptera novaeangliae
Changes in the ventral fluke pattern of the humpback whale (Megaptera novaeangliae
), and its effect on matching; evaluation of its significance to photo-identification research.
Humpback whales (Megaptera novaeangliae
) aggregate in winter breeding and calving grounds along continental margins, coastal islands or archipelagos located in tropical waters.
Marine species composition has shifted in the southern portion of the Bering Sea, with a dramatic increase in walleye pollock (Theragra chalcogramma), some increase in humpback (Megaptera novaeangliae
) and fin whales (Balaenopteraphysahis), and declines in Greenland halibut (Reinhardtius hippoglos-soides), snow crab (Chionoecetes opilio), and fur seal (Cal-lorhinus ursinus) (Newsome et al., 2007; NOAA, 2010).
Of these, on average, roughly 30% were identified to species (Table 2) which included Pacific white-sided dolphins; killer whales, Orcinus orca; and humpback whales, Megaptera novaeangliae
. If an observer's comment indicated he/she was not fully confident of the species identification, the sighting was not identified to species nor used in subsequent analyses (see footnotes 1 and 2 in Table 2).
acutus associated with feeding humpback (Megaptera novaeangliae
) and fin whales (Balaenoptera physalus).
Overall, three cetacean species appear to have populations concentrated in coastal waters: Stenella attenuata graffmani, Tursiops truncatus, and Megaptera novaeangliae
. These three may be more susceptible to human activities due to the overlap of their ranges with fishery areas (tuna and artisanal fisheries), and an uncontrolled increase of touristic whale watching activities in several parts of their range.
"Commercial whaling, especially for gray whales, Eschrichtius robustus, and humpback whales, Megaptera novaeangliae
, at California and Baja California shore stations in the 19th century (1854-1899)," by Randall R.
Synchronous surfacing was sometimes very dynamic: single whales, pairs, and groups of 3 to 4 animals lunged upwards out of the water with their heads together in a manner similar to that of cooperatively feeding humpback whales (Megaptera novaeangliae