File: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 (20580263232).jpg

Title: 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
Identifier: cetaceansofchan00leat (find matches)
Year: 1987 (1980s)
Authors: Leatherwood, Stephen; Stewart, Brent Scott; Folkens, Pieter A; Channel Islands National Marine Sanctuary (Agency : U. S. ); United States. National Marine Fisheries Service
Subjects: Whales California Channel Islands.
Publisher: Santa Barbara, Calif. : The Sanctuary
Contributing Library: Penn State University
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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32. a. 20-26 teeth in upper jaws, 18-24 in lower jaws; body to 3.7 m; teeth may be extensively worn. * Bottlenose dolphin, Tursiops truncatus (A) b. 26 or more teeth in both upper and lower jaws Go to 33 3 3. a. 34-48 teeth in each jaw; body color varies with age and stock but includes increased spotting with age and size. * Spotted dolphin, Stenella attenuata (T) 1. Body robust to 2.5 m, dark silver, heavily spotted; distributed within 60 nm of coast south of about 20 N. * Coastal spotted dolphin (T) 2. Body elongated to 2.3 m, less heavily spotted; distributed from south of Cabo San Lucas to below Equator and west to 145 W. * Offshore spotted dolphin b. 46-65 teeth in each jaw; spotting absent Go to 34 34. a. Dorsal fin erect, triangular or canted slightly forward; beak long and slender; teeth fine and sharply pointed. * Spinner dolphin, Stenella longirostris (T) 1. Adult males have pronounced postanal hump and forward canted dorsal fin; body length to 1.9 m. * Eastern spinner dolphin 2. Body more girthy, larger, to 2 m; belly white; sharp color differential from the dark back and sides to white belly; dorsal fin falcate. * Whitebellied spinner dolphin 3. Body larger, to over 2 m; dorsal fin falcate; three part color pattern, dark cape, lighter sides, white belly. * Hawaiian and Marquesan spinner dolphin b. Dorsal fin falcate or slightly falcate Go to 35 3 5. a. Body to 2.7 m; black to dark gray on back, gray on sides, white on belly and throat; distinctive black stripes from eye to anus, eye to flipper, and dark dorsal coloration to side above flipper; dis- tinctive light shoulder blaze extending back and up from light lateral field; rare north of Baja California. * Striped dolphin, Stenella coeruleoalba (T/B) b. Body to maximum of 2.6 m but usually less than 2.3 m; body dark on back with light thoracic patch and crisscross or hourglass pattern on side; cape dips in V-shape just below dorsal fin; black stripe from middle of lower jaw to origin of flipper; generally uncommon north of Pt. Conception. * Common dolphin, Delphinus delphis (A)
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61

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