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Latin american journal of aquatic research

versión On-line ISSN 0718-560X

Resumen

TRUJILLO, Ernesto  y  MARTINEZ, Guillermo. Operational efficiency of the longline hauler on a prototype artisanal tuna fishing vessel from Margarita Island, Venezuela. Lat. Am. J. Aquat. Res. [online]. 2010, vol.38, n.3, pp.485-492. ISSN 0718-560X.

The operational efficiency of the long line hauler on an artisanal tuna fishing vessel from Margarita Island, Venezuela, was determined using the average setting velocity, average hauling velocity, hauler input tension (T0) and traction strength (P). A direct relationship was found between the average gravity (qmed) on the long-line section and the hauler input tension (T0). Considering a strength (Pmed) at the input of the long line hauler (Sj), the roller tension (S3) decreases due to the force of H = 23.7 N exerted by the pressure roller, resulting in a strength of S4 = 0. The long-line average setting velocity was 208 m min-1 (~ 333 hooks/hour) and its hauling velocity was 121 m min-1 (~ 160 hooks/hour), whereas hauler input tension (T0) was 1013 N. Therefore, the new traction strength (P) fluctuated between 1.317 and 1.418 N. Based on torque output from the rollers of the long line hauler, the average hauling velocity (vmed) and the transmission relations (ki, k2), a required average strength (Nmed) of 5.3 hp (~ 3.95 kW) for long-line retrieval was estimated. Thus, the hauling efficiency (Tp) by long-line section was estimated to be 135.4 s.

Palabras clave : tuna longline hauler; operational efficiency; artisanal vessel; Margarita Island; Venezuela.

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