The author has studies on the results of measured soaking depth and the fishing operations of the deep tuna longline (having 10 branch lines) in the tropical area of eastern Indian Ocean, and has obtained the following results. 1. The range of measured soaking depth of the deep tuna longline is from 98 m to 299 m. 2. The catch rate of bigeye tuna of deep hooks is high compared with shallow hooks. This result would show that the density of destribution is considerably high at the deepest hook. 3. In the case of bigeye tunas caught by the deep tuna longline, the hooking time of deep hooks is earier than shallow hooks. 4. The density of destribution of bigeye tuna is thick in the daytime but the center of destribution gradually begins to rise ...
Historical longline catch per unit effort (CPUE) constitutes the major time series used in tuna stoc...
Wahoo (Acanthocybium solandri Cuvier, 1832) is a member of the Scombrid family, is a pelagic (open o...
The pelagic longline is a common gear type used worldwide primarily for the commercial harvest of sw...
We attempted to exam ine how steep bathymetry affected tuna catch rates by analyzing the digital dep...
The hooked bigeye tuna’s depth was calculated by the catenary curve equation based on the identified...
The study for relation between the tuna fishing condition and the oceanographic environment are disc...
Bigeye tuna (Thunnus obesus) have distinctive depth distributions and vertical movement patterns. Th...
The study for relation between the tuna fishing condition and the oceanographic environment are disc...
Yellowfin (Thunnus albacares) and bigeye (T. obesus) tuna have been intensively exploited by longlin...
Bigeye tuna are targeted by longliners and caught incidentally by purse seiners in the tropical Paci...
As to the tuna long-line gear two facts were already clarified, first, that under the sea water it f...
Stomach contents of three species of tuna, (Thunnus obesus, T albacares, T alalunga) commonly taken ...
The horizontal and vertical movements of large bigeye tuna (#Thunnus obesus$ Lowe, 1839 ; 25 to 50 k...
The main target species of Japanese purse seine operated in the tropical waters of the Pacific Ocean...
Based on the data of bigeye tuna captured by tuna longline fishery in the Western Central Atlantic O...
Historical longline catch per unit effort (CPUE) constitutes the major time series used in tuna stoc...
Wahoo (Acanthocybium solandri Cuvier, 1832) is a member of the Scombrid family, is a pelagic (open o...
The pelagic longline is a common gear type used worldwide primarily for the commercial harvest of sw...
We attempted to exam ine how steep bathymetry affected tuna catch rates by analyzing the digital dep...
The hooked bigeye tuna’s depth was calculated by the catenary curve equation based on the identified...
The study for relation between the tuna fishing condition and the oceanographic environment are disc...
Bigeye tuna (Thunnus obesus) have distinctive depth distributions and vertical movement patterns. Th...
The study for relation between the tuna fishing condition and the oceanographic environment are disc...
Yellowfin (Thunnus albacares) and bigeye (T. obesus) tuna have been intensively exploited by longlin...
Bigeye tuna are targeted by longliners and caught incidentally by purse seiners in the tropical Paci...
As to the tuna long-line gear two facts were already clarified, first, that under the sea water it f...
Stomach contents of three species of tuna, (Thunnus obesus, T albacares, T alalunga) commonly taken ...
The horizontal and vertical movements of large bigeye tuna (#Thunnus obesus$ Lowe, 1839 ; 25 to 50 k...
The main target species of Japanese purse seine operated in the tropical waters of the Pacific Ocean...
Based on the data of bigeye tuna captured by tuna longline fishery in the Western Central Atlantic O...
Historical longline catch per unit effort (CPUE) constitutes the major time series used in tuna stoc...
Wahoo (Acanthocybium solandri Cuvier, 1832) is a member of the Scombrid family, is a pelagic (open o...
The pelagic longline is a common gear type used worldwide primarily for the commercial harvest of sw...