Index of visual monitoring, location, species behavior, and identification of cetaceans from CalCOFI cruises in the California Current System, 2005-2015 (ongoing).

Field observations are carried out to gain understanding of cetacean ecology and habitat. Visual monitoring for cetaceans has been conducted on quarterly CalCOFI cruises since July 2004 using standard line-transect protocol (Burnham et al. 1980;Buckland et al. 1993; Barlow 1995). Visual observers watch during daylight hours, when weather permits (Beaufort sea states 0 to 5 and visibility greater than 1 nautical mile) and while the ship transits between CalCOFI stations.

本研究通过野外实地观测，旨在解析鲸类（cetacean）的生态学特性及其栖息地状况。自2004年7月起，研究团队便依托季度性CalCOFI航次，采用标准样线调查规程（Burnham等，1980；Buckland等，1993；Barlow，1995）开展鲸类视觉监测工作。视觉观测员需在昼间开展观测，且需满足天气许可条件：蒲福海况等级（Beaufort sea states）为0至5级，能见度不低于1海里；观测时段需覆盖调查船往返CalCOFI站位的全部航行过程。