. 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 c. Ventral grooves absent, but 2-3 deep longitudinal creases present on chin or throat; viewed dorsally or laterally head nearly tri- angular, mouthline slightly arched; dorsal fin absent, but small hump present, followed by 6-12 ridges or crenulations; maximum body length m; 138-180 wh
. 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 c. Ventral grooves absent, but 2-3 deep longitudinal creases present on chin or throat; viewed dorsally or laterally head nearly tri- angular, mouthline slightly arched; dorsal fin absent, but small hump present, followed by 6-12 ridges or crenulations; maximum body length m; 138-180 white to yellowish-white baleen plates per side; body mottled gray. * Gray Whale, Eschricbtius robustus (A) 3. a. Ventral grooves end before navel Go to 4 b. Ventral grooves extend to or beyond navel Go to 5 4. a. 50-70 ventral grooves [2] longest often ending between flippers; baleen less than 21 cm long, mostly white or yellowish white (some posterior plates may be dark) with 15-25 white bristles per centimeter; 231-285 plates per side [3] head coloration sym- metrical; maximum body length 10 m; conspicuous white band on each flipper; viewed laterally, head flat; viewed dorsally, head a slim, pointed triangle. * Minke Whale, Balaenoptera acutorostmta (A) b. 32-60 ventral grooves, longest ending well short of navel; baleen less than 80 cm long, black (some antenormost plates may be white) and with 35-60 fine silky light bristles per centimeter; 219-402 plates per side; head coloration symmetrical; viewed laterally head slightly arched near tip; viewed dorsally head slightly rounded on tip; maximum body length 16m; flippers all dark. * Sei Whale, Balaenoptera borealis (B) 5. a. Flippers one-fourth to one-third of body length, knobbed on leading edge (two prominent knobs); less than 23 broad, conspic- uous ventral grooves, longest extending at least to navel; head covered with numerous knobs; barnacles often attached to head, including lips; baleen less than 80 cm long, ash black
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Keywords: ., bookcentury1900, bookcollectionamericana, bookleafnumber61, booky
