86 
Fishery Bulletin 108(1 ) 
Smolker, R., A. Richards, R. Connor, J. Mann, and P. Berggren. 
1997. Sponge carrying by dolphins (Delphinidae, Tursiops 
sp. ) : A foraging specialization involving tool use? Ethol- 
ogy 103:454-465. 
Stockin, K. A., C. R. Weir, and G. J. Pierce. 
2006. Examining the importance of Aberdeenshire (UK) 
coastal waters for North Sea bottlenose dolphins (Tur- 
siops truncatus). J. Mar. Biol. Assoc. U.K. 86:201- 
207. 
Tershy, B. R., D. Breese, and C. S. Strong. 
1990. Abundance, seasonal distribution and population 
composition of balaenopterid whales in the Canal de 
Ballenas, Gulf of California, Mexico. Rep. Int. Whal. 
Comm. Spec. Issue 12:369-375. 
Waring, G. T., E. Josephson, C. P. Fairfield-Walsh, and K. Maze- 
Foley (eds.). 
2007. US Atlantic and Gulf of Mexico marine mammal 
stock assessments — 2007, 415 p. NOAA Tech. Memo. 
NMFS-NE-205 Woods Hole, MA. 
Wilson, B., P. M. Thompson, and P. S. Hammond. 
1997. Habitat use by bottlenose dolphins: seasonal dis- 
tribution and stratified movement patterns in the Moray 
Firth, Scotland. J. Appl. Ecol. 34:1365-1374. 
Wiirsig, B., and M. Wiirsig. 
1977. The photographic determination of group size, 
composition, and stability of coastal porpoises (Tursiops 
truncatus). Science 198:755-756. 
