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Mortality of fish escaping trawl gears










Suuronen, P.Mortality of fish escaping trawl gears.FAO Fisheries Technical Paper. No. 478. Rome, FAO. 2005. 72p.


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    The papers contained in this supplement cover theoretical aspects of fisheries management and its practice in a general manner. Two aspects of fisheries management are reviewed from the perspective of the market for fish and from the fishermen's view. The majority of the papers discuss specific regulatory techniques such as fixed fishing gear, selectivity of fishing gears including mesh size regulation, controls over numbers of fishing vessels and the effects of various financial measures. Sever al of the papers examine approaches to fisheries regulation that attempt to overcome the common property aspect of fisheries resources. The last paper re-examines the basic equilibrium theory that is applied to most fisheries.
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    A system for the marking of fishing gear should be an integral part of fisheries management. The marking of fishing gear is an important tool to reduce gear loss and aid recovery, helps in determining ownership, assists in the management and control of fishing effort, facilitates monitoring, control and surveillance, and deters IUU fishing. The marking of fishing gear also contributes to safe navigation. This document evaluates the major fishing gears that harvest species under the management of the Indian Ocean Tuna Commission (IOTC) through a risk assessment to determine the level of complexity when implementing a system of fishing gear marking. The analysis includes five types of fishing gear, which account for 90 percent of fish landings in the IOTC area of competence, as well as two types of fish aggregating device (FAD). Purse seines, drift gillnets, and drifting FADs are deemed to have “high” or “very high” overall risks, while anchored FADs have “medium” risks, and handline, pole-and-line and trolling lines have “very low” risks. Based on the evaluation, the document proposed a framework for marking these fishing gears and FADs, based on the principles outlined in the FAO Voluntary Guidelines on the Marking of Fishing Gear. It also provides an indicative economic assessment for implementing a system of fishing gear marking in the IOTC area, based on the responsibilities between the IOTC Secretariat, the Contracting Parties and Cooperating Non-contracting Parties (CPCs), and fishing operators (fishers, fisher organizations and/or corporations). Implementing a system of fishing gear marking requires extensive effort from the IOTC Secretariat and CPCs in terms of awareness raising and communication. Considering the diversity of CPCs, which are predominately developing states, implementing a system of fishing gear marking in the IOTC area will require careful consideration in terms of capacity-building requirements and financial assistance, especially for the least developed states and Small Island Developing States. As requested by IOTC, a draft resolution for implementing a system of fishing gear marking for the IOTC area of competence has been prepared.

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