Laurs, R.M., H.S.H. Yuen, and J.H. Johnson. 1977. 

 Small-scale movements of albacore, Thunnus alalun- 

 ga, in relation to ocean features as indicated by 

 "ultrasonic tracl<ing and oceanographic sampling. 

 Fish. Bull., U.S. 75:347-355. 



Gave average swimming speeds of 1.6 kn; 

 during day 1.7 kn, at night 1.3 kn. Move- 

 ments were influenced by sea surface tempera- 

 ture; fish avoided low temperature water, 

 fish stayed on the warm side of local upwell- 

 ing fronts. Results suggested that 1) alba- 

 core concentrate in the vicinity of upwelling 

 fronts presumably to feed and 2) the fish 

 move away from the immediate area when up- 

 welling ceases and the front is no longer 

 present at the surface. 



KEY WORDS: tuna, albacore, oceanography, 

 migration, temperature, upwelling, fronts, 

 feed . 



LeGuen, J.C., J.R. Donguy, and C. Henin. 1977. Per- 

 spectives on the tuna fishery in the South Pacif- 

 ic. [In Fr.] Marit. Fish. 56 (1 186 ): 20-28 . 



A brief history of the Japanese, Korean, and 

 Taiwanese fisheries in the South Pacific. A 

 summary of Japanese activities for 1975 and 

 1976 based on Japanese data atlases. Statis- 

 tics of catch per area revealed the impor- 

 tance of hydrological per terbations connected 

 with islands and of the equatorial and tropi- 

 cal current systems. A very active fishery 

 centered on the convergence between the 

 Equatorial Current and the North Equatorial 

 Countercurrent . Near island groups, skipjack 

 schools concentrated on the interior of large 

 reefs; also in island wakes. The authors 

 promoted the idea of the use of airborne or 

 satellite thermal sensors to delimit water 

 masses and large current systems. 



KEY WORDS: tunas, billfishes, currents, 

 convergence, island wakes, temperature, water 

 mass, fronts. 



49 



