. Cetaceans of the Channel Islands National Marine Sanctuary / prepared for National Oceanic and Atmospheric Administration, Channel Islands National Marine Sanctuary and NOAA, National Marine Fisheries Service by Stephen Leatherwood, Brent S. Stewart, Pieter A. Folkens. Whales California Channel FIGURE 6. In recent years, numerous gray whales have been found entangled in gill nets set in their migratory corridors. Growing gill net fisheries could pose a significant threat, particularly to young animals. (Photos at Ocean Beach, San Diego, California, January 1985 by S. Leatherwood, a
. Cetaceans of the Channel Islands National Marine Sanctuary / prepared for National Oceanic and Atmospheric Administration, Channel Islands National Marine Sanctuary and NOAA, National Marine Fisheries Service by Stephen Leatherwood, Brent S. Stewart, Pieter A. Folkens. Whales California Channel FIGURE 6. In recent years, numerous gray whales have been found entangled in gill nets set in their migratory corridors. Growing gill net fisheries could pose a significant threat, particularly to young animals. (Photos at Ocean Beach, San Diego, California, January 1985 by S. Leatherwood, above; and off Ventura, February 1985 by K. Connally, left.). Humpback Whale Megaptera novaeangliae (Borowski, 1781) The humpback whale has a coastal distribution on both sides of the North Pacific and also occurs regularly and in relatively large numbers around offshore islands, such as the Revillagigedos off Mexico, the Hawaiian islands in the mid-Pacific, and the Ryukus off southern Japan. These well known whales (often featured in film and slide presentations and familiar to many because of thier complex and haunting "songs") were hunted by primitive methods off Japan and along the Pacific northwest coast of North America from very early times. Yankee pelagic whalers killed some humpbacks during the nineteenth century, but mainly when more valuable species, like the right and sperm whale, were unavailable. It has been estimated that there were about 15,000 humpbacks present in the North Pacific around the turn of the century, divided in unknown proportions among three putative stocks: Mexican — off the mainland Mexican and Baja California coasts and around the Re- villagigedos; Hawaiian; and Asian - around the Mariana, Bonin and Ryuku islands and Taiwan. It should be noted that long term studies of humpback whales in the Atlantic, using photo-documentation and individual identification to study movements and stock relationships, have forced constant revision of s
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Keywords: ., bookcentury1900, bookcollectionamericana, bookdecad, bookyear1987
