. Bulletin. Science; Natural history; Natural history. RESEARCH NOTES 159. - -^ B vtL â ifis.) 'â »-»*'*ep|ft*w«^«^«^ i â¢n»K^ Fig. 2. M. novaeangliae surfacing near the Los Angeles Breakwater. Rostrum is at A, and nares atB. Humpback whales are regularly sighted in their eastern North Pacific winter grounds October through May. Mexican grounds extend south along the west coast of Baja California and around the peninsula into the Gulf of California north to at least San Jose Island. According to Leatherwood et al. (1982), the summer grounds extend from the Bering Sea south to Point Conce
. Bulletin. Science; Natural history; Natural history. RESEARCH NOTES 159. - -^ B vtL â ifis.) 'â »-»*'*ep|ft*w«^«^«^ i â¢n»K^ Fig. 2. M. novaeangliae surfacing near the Los Angeles Breakwater. Rostrum is at A, and nares atB. Humpback whales are regularly sighted in their eastern North Pacific winter grounds October through May. Mexican grounds extend south along the west coast of Baja California and around the peninsula into the Gulf of California north to at least San Jose Island. According to Leatherwood et al. (1982), the summer grounds extend from the Bering Sea south to Point Conception. Rice (1974) maintained that many sightings occur throughout the summer off central California. For the last five years, Woodhouse (pers. comm.) has recorded annual sightings of 20-30 whales in the Santa Barbara Channel between May and Sep- tember. A Bureau of Land Management (BLM) survey (Norris et al. 1976, 1981) summarized 28 humpback whale sightings reported from Point Conception to the Mexican border between 1949 and 1978. Most whales were sighted from June to November in water 90 to 1500 m deep. The study concluded that the Santa Barbara Channel appears to be a humpback whale seasonal gathering ground, and the Santa Rosa-Cortes Ridge may be a major migratory pathway. No sightings have been reported from the San Pedro Channel. The 1982 sighting documented below is incorporated with BLM sighting data in Figure 1. While conducting marine biology classes for Los Angeles school children, the vessel DAIWA sighted a single whale at 1330 h on 5 May 1982. Three other vessels engaged in similar activities joined the first: the MAVERICK, the AT- LANTIS, and the GOLDEN DOUBLOON. The following observations took place from the GOLDEN DOUBLOON. Calm sea conditions and clear photographs aided verification of the whale's identity as a Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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