“…In the published literature, fishing effort is expressed in the following ways: (1) number of vessels (Dunn et al, 2009;Rodríguez-Quiroz et al, 2009); (2) size (or tonnage) of vessels (Bordalo-Machado, 2006;FAO, 2009;World Bank, 2009); (3) spatial and temporal intensity of fishing such as 'days at sea', 'hauls, tows, or trips per unit of space or time', etc. (Mangel et al, 2010); (4) dimension and characteristics of fishing gears such as number of hooks, number of pots, or total length of nets (Pons et al, 2010;Waddington and Meeuwig, 2009); (5) engine power (horsepower or kilowatt) (Bordalo-Machado, 2006;Mu et al, 2007;Yu and Yu, 2008); and (6) the use of advanced technological aids such as fish finders (Karakulak, 2004;Melvin et al, 2002) (Appendix B.1-3). Increasing skills of skippers and fishing crews also contribute to the effectiveness of fishing effort and capacity (Pascoe and Coglan, 2002;Squires and Kirkley, 1999).…”