Boersma, P.D. 1978. Breeding patterns of Galapagos 

 penguins as an indicator of oceanographic condi- 

 tions. Science (Wash., D.C.) 200:1481-1483. 



A paper on breeding patterns of Galapagos 

 penguins as influenced by oceanographic 

 conditions. Oceanographic parameters were 

 intimately related to the distribution, 

 growth, reproductive timing, and reproductive 

 success of Galapagos penguins. The breeding 

 biology of seabirds may be a useful reflec- 

 tion of long-term environmental conditions. 



KEY WORDS: seabirds, reproduction, distribu- 

 tion, environment. 



Bozhkov, A.T. 1973. The effect of oceano] og ical condi- 

 tions on the distribution of tunas. [In Russ.] 

 Tr . Atl . Na uchno-Issled . Inst. Rybn. Khoz. 

 Okeanogr. 51:69-80. 



Not read. 



Brandhorst, W. 1958. Thermocline topography, zooplank- 

 ton standing crop and mechanisms of fertilization 

 in the eastern tropical Pacific. J. Cons. Perm. 

 Int. Explor. Mer 24(1):16-31. 



Compared thermocline topography with zoo- 

 plankton distribution and found an inverse 

 relationship between thermocline depth and 

 size of zooplankton standing crop, which in 

 some regions appeared related to abundance of 

 tunas. A general description of oceanograph- 

 ic features in the eastern tropical Pacific. 

 Availability of nutrients to phytoplankton 

 was dependent upon depth of the thermocline. 



KEY WORDS: tunas, yellowfin, skipjack, 

 oceanography, thermocline, food, season, dis- 

 tribution, depth, temperature, salinity, 

 oxygen, currents. 



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