dalli, is based on examination of the stomach con- 

 tents of stranded animals, animals accidentally 

 taken in commercial fishing gear, those taken in 

 the western Pacific commercial fishery, and ani- 

 mals that died during capture attempts. Of these 

 only a few were normally feeding animals taken at 

 sea, whose stomach contents were thoroughly 

 examined. Fishes and squids previously identified 

 from stomachs of dolphins and porpoises by vari- 

 ous investigators are listed in Table 1. 



This paper documents the stomach contents of 

 44 Pacific white-sided dolphin and 9 Dall's por- 

 poise collected at sea off California and Washing- 



ton. All animals were collected by the authors 

 during pelagic fur seal studies with the exception 

 of three dolphins which were collected by a staff 

 biologist during whale research voyages off 

 California. Comparisons of stomach contents are 

 made between the Pacific white-sided dolphin, 

 Ball's porpoise, and northern fur seal, Callorhinus 

 ursinus, collected near the same locations and 

 usually on the same day. Mention of the dolphin, 

 porpoise, and seal in this paper refers to the 

 above-named species only unless noted otherwise. 

 The Pacific white-sided dolphin ranges the east- 

 ern North Pacific Ocean, from Baja California 



Table l. — List of fishes and squids previously identified in stomachs of Pacific white-sided dolphin and Ball's porpoise from the North 



Pacific Ocean by localities. 



Reference source 



Locality and species 



Pacific white-sided dolphin 



Dall's porpoise 



California: 

 Pacific herring, Clupea harengus pallasi 

 Pacific sardine, Sardinops sagax 

 Northern anchovy, Engraulis mordax 



Night smelt, Spirinchus starksi 

 California smoothtongue, Bathylagus stilbius 

 Pinpoint lampfish, Lampanyctus regalis 

 Blue lanternfish, Tarletonbeania crenularis 

 Pacific whiting, Merluccius productus 



Cusk-eel, Otophidium taylori 



Eeelpouts, Zoarcidae 



Grenadier, Macrouridae 



Pacific saury, Cololabis saira 



Jack mackerel, Trachurus symmetricus 



Pacific pompano, Peprilus simillimus 



Rockfish, Sebastes spp., juvenile 



Sablefish, Anoplopoma fimbria, juvenile 



Snailfish, Liparis sp. 



Pacific sanddab, Citharichthys sordidus 



Eels, Anguilliformes 



Squid, Loligo opalescens 



Squid, Abraliopsis sp. 



Squid, Gonatus sp. 



Squid, Onychoteuthis borealijaponicus 



Octopus, Octopus bimaculatus 

 British Columbia: 



Pacific herring, Clupea harengus pallasi 

 Gulf of Alaska: 



Capelin, Mallotus villosus 

 Japan: 



Anchovy Engraulis japonica 



Sudidae, Paralepis sp. 



Lanternfish , Myctophidae — Scopelidae 



Lanternfish, Notoscopetus sp. 



Lanternfish, Diaphus sp. 



Lanternfish, Tarletonbeania taylori 



Lanternfish, Lampanyctus sp. 



Lanternfish. Myctophum sp. 



Cod, Laemonema longipes 



Hake, Laemonema morsum 



Mackerel, Scomber japonicus 



Squid, Watasenia scintillans 



Squid, Omnastrephes sloani paclficus 

 Northwestern Pacific and western Bering Sea: 



Sockeye salmon, Oncorhynchus nerka 



Unidentified small fish 



Unidentified fish 



Squids 



Shrimp 



Higgins 1919 



Brown and Norris 1956; Norris and Prescott 1961: 

 Fiscus and Niggol 1965: Fitch and Brownell 1968 



Best 1963; Fiscus and Niggol 1965; Fitch and 

 Brownell 1968 



Houck 1961 



Scheffer 1953; Norris and Prescott 1961 ; Houck 

 1961 



Brown and Norris 1956; Ridgway 1966 

 Fiscus and Niggol 1965 



Hotta etal. 1969 

 Wilkeetal. 1953 



Wilkeetal. 1953 

 Wilkeetal. 1953 

 Hotta etal 1969 



Best 1963; Loeb 



Loeb 1972 



Loeb 1972 



Loeb 1 972 

 Loeb 1 972 

 Loeb 1972 

 Loeb 1972 

 Norhs and Prescott 1 961 ; 



1972 

 Loeb 1972 

 Loeb 1972 

 Loeb 1972 



Norris and Prescott 1961 



Loeb 1972 



Loeb 1972 



Loeb 1972 



Loeb 1 972 



Loeb 1972 



Loeb 1 972 



Norris and Prescott 1961 ; Loeb 1972 



Loeb 1972 



Loeb 1972 



Loeb 1972 



Loeb 1972 



Cowan 1 944 



Scheffer 1 953 



Wilke 

 Wilke 

 Wiike 

 Wilke 

 Wilke 

 Wilke 

 Wilke 

 Wilke 

 Wilke 



and Nicholson 

 etal. 1953 

 and Nicholson 

 and Nicholson 

 and Nicholson 

 and Nicholson 

 and Nicholson 

 and Nicholson 

 etal. 1953 



1958 



1958 

 1958 

 1958 

 1958 

 1958 

 1958 



Wilke and Nicholson 1958 



l\/lizue et al. 1966 



Koga 1 969 



Mizue and Yoshida 1965; Mizue et al. 1966 



(Vlizue and Yoshida 1965; l^izue etal. 1966; 



Koga 1 969 

 IVIizue and Yoshida 1965; Mizue etal. 1966; 



Koga 1 969 



952 



