Balaenoptera musculus

Distribution: Worldwide distribution from arctic to tropical waters. In Myanmar, recorded in the Myanmar coastal waters (Yamada et al. 2022).

Sumber: Mammals of Myanmar: an annotated checklist

Conservation: CITES – Appendix I; U. S. ESA – Endangered; IUCN – Endangered as B. m. intermedia, Data Deficient as B. m. brevicauda; Endangered as B. musculus except – Vulnerable (North Atlantic stock), Lower Risk (cd) (North Pacific stock).

Sumber: Order Cetacea

Distribution: Worldwide: arctic to tropical waters.

Sumber: Order Cetacea

PROTECTED STATUS: CITES - Appendix I and U. S. ESA - Endangered.

Sumber: Order Cetacea

DISTRIBUTION: Worldwide, subtropical to subarctic waters.

Sumber: Order Cetacea

Habitat. Epipelagic regions of all ocean basins, except the Arctic, and sometimes in neritic coastal areas of continental shelves. Blue Whales occur in coastal areas of continental shelves such as the Gulf of Saint Lawrence, Gulf of California, and Southern California Bight and in submerged oceanic plateaus and volcanoes (Madagascar Plateau, Crozet Plateau, and Kerguelen Plateau). Habitat preferences of Blue Whales are related to feeding grounds, which appear to be localized and the consequence of strong oceanographic interactions between currents and seafloor topographic features or convergence of surface currents that form cyclonic circulation and a shallow thermocline. This pattern is reflected in the population of Blue Whales that summers in the eastern North Pacific Ocean off central California, where individuals appear to prefer coastal habitats marked by steep submarine topographic features that enhance upwelling (shelfsslope break, borderland basin margins, etc.). These Blue Whales feed almost exclusively on krill during boreal summer and early autumn as far north as the Farallon Islands and Monterey Bay before moving south to waters around the Channel Islands to continue feeding during autumn. During boreal winter, individuals move further south into the Gulf of California and continue to feed on krill in protected waters of Bahia de Loreto. Some members of this population are even reported to migrate during boreal winter to the Costa Rica Dome (10 ° N) in the tropical eastern Pacific Ocean, where upwelling and a shallow thermocline result from a combination of cyclonic surface current circulation and large-scale wind patterns. In contrast, austral summer foraging habitat of the Blue Whale in high-latitude regions of the Southern Ocean is generally associated with areas of sharp oceanographic density interfaces, such as those caused by convergence of cold, northward flowing surface waters from Antarctica and relatively warmer surface waters of the subantarctic region (Antarctic Convergence). Whaling records indicate that the neritic waters off the south-western coast of South Africa were formerly frequented by Blue Whales during austral winter.

Sumber: Balaenopteridae