Consulta: creatorFacets:"Nishida, T."
Registros recuperados: 5
Data/hora: 08/06/2024 11:46:54

Estimation of the catch-at-age matrix of yellowfin tuna (Thunnus albacares) fisheries in the Western Indian Ocean.
Provedor de dados: 20
Autores: Nishida, T.
This is a preliminary paper. There are many different types of gears in many different countries in the western Indian Ocean. As it was sometimes difficult to contact persons-in-charge of the fisheries statistics, not all the description of this paper (such as gear categories, classification and etc) could be checked by them.
Tipo: Proceedings Paper
Palavras-chave: Fishing effort; Fishing gear; Catching method.
Ano: 1998
URL: http://hdl.handle.net/1834/54

Analysis and prediction of yellowfin tuna (Thunnus albacares) catch rates of longline fisheries in the western Indian Ocean using a neural network.
Provedor de dados: 20
Autores: Nishida, T.; Komatsu, T.
Strengthening tuna management is one of the primary tasks for the new Indian Ocean Tuna Commission (IOTC). Stock assessment and the prediction of the dynamics of the tuna resources will become increasingly important research topics because they provide the basic information for the management decision process. Under these circumstances, this paper attempts to develop the stock analyses and prediction techniques using neural networks. As a first step and as a test study, analyses and predictions of catch rates of the Japanese yellowfin tuna longline fisheries are attempted.
Tipo: Proceedings Paper
Palavras-chave: Fishery management; Stock assessment; Catch/effort; Tuna fisheries.
Ano: 1998
URL: http://hdl.handle.net/1834/60

Review and research plan on the stock structure of yellowfin tuna (Thunnus albacares) and bigeye tuna (Thunnus obesus) in the Indian Ocean
Provedor de dados: 20
Autores: Nishida, T.; Chow, S.; Grewe, P.
Yellowfin and bigeye tuna are the most important tuna species in the Indian Ocean, this paper reviews the stock structure of these two species and describes research plans based on the review.
Tipo: Proceedings Paper
Palavras-chave: Tuna fisheries; Fishery management; Yield.
Ano: 1998
URL: http://hdl.handle.net/1834/59

Preliminary Resource Assessment of Yellowfin Tuna (Thunnus Albacares) in the Western Indian Ocean by the Stock-Fishery Dynamic Model
Provedor de dados: 20
Autores: Nishida, T.
Yellowfin tuna (Thunnus albacares, YFT) in the Indian Ocean has been exploited for more than 200 years (Anderson and Hafiz, 1985), while official statistics are available for some 40 years. In this region, the YFT resource has been commercially important as a protein source for both developing and developed countries. Hence, it is essential to manage and conserve YFT resources properly for future generations. To this end, an assessment of the YFT stock is presented in this paper, in order to provide fundamental information for its management. More than 80% of the YFT catch from the Indian Ocean comes from the western part (Figure 1), so this assessment is focused on that part. In this study, the stock structure of the Indian Ocean YFT is assumed to be two...
Tipo: Report
Palavras-chave: Tuna fisheries; Fishery statistics.
Ano: 1994
URL: http://hdl.handle.net/1834/520

Influence of purse-seine fisheries on longline fisheries for yellowfin tuna (Thunnus albacares) in the western Indian Ocean
Provedor de dados: 20
Autores: Nishida, T.
An examination is made of the possible impact of purse seine fisheries on the longline fisheries for the Western Indian Ocean yellowfin tuna (Thunnus albacares) stock. Past research works on fisheries interactions are reviewed and then descriptive (spatial and temporal) analyses are attempted for basic fisheries statistics (catch, CPUE and size). It was discovered that the general trends of longline CPUE are more or less constant in the whole purse seine fishing ground before and after purse seining started, while those in the heavy purse seine fishing grounds show a moderate decrease. This moderate decrease is discussed for 2 cases: the long-term situation and the immediate situation.
Tipo: Proceedings Paper
Palavras-chave: Tuna fisheries Thunnus albacares Purse seining Longlining Catch/effort ISW; West Indian Ocean.
Ano: 1996
URL: http://hdl.handle.net/1834/17