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A total of 540 fish were collected at random from the catch of commercial trawlers during 1982 -83 and 1992 -93.
Deep trawlers were the single largest harvesting sector in terms of total value of output and net earnings throughout the simulation period.
Fish were sorted on board by species, and stored in baskets with ice in the cool room of the trawler.
A number of trawlers were converted and a number of new purse seiners, designed to fish farther offshore, were constructed.
The effort levels of day trawlers and gillnets were reduced during the first four years.
The profit margins for purse seines, single-day trawlers and gillnets were relatively less to begin with.
On the contrary, deep trawlers (35 per cent) had high profit margins among mechanized sectors.
In our study, the partial removal of cost-inefficient trawlers and gillnets helped ease the crowding effects early on.
However, the total number of registered trawlers and push nets has again increased.
The fauna consisted of 13 aerial foragers, 9 gleaners, 11 fruit/leaf eaters, one trawler, one flower-visitor and one blood-feeder.
The restrictions on future expansion of purse seines and deep trawlers helped restore the stocks particularly of demersal species.
The limited access policy includes prohibiting construction of new trawlers and phasing out of the biologically destructive push net fishery.
This limited access policy includes prohibiting construction of new trawlers and phasing out of the biologically destructive push net fishery.
The bioeconomic model results showed that there was a rapid increase in the deep trawlers fishing effort, and a decline in the stocks of fish that these vessels were after.
Unimpeded construction of purse seine vessels, backed by publicly provided credit, and conversion from trawlers to the purse seine gear helped counter capacity reduction from the trawl ban.
