2 results

Bycatch assessment of the estuarine commercial gill net fishery in NSW

Project number: 2000-172
Project Status:
Completed
Budget expenditure: $166,539.00
Principal Investigator: Charles A. Gray
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 20 Nov 2000 - 14 Jan 2004
Contact:
FRDC

Need

Reduction of wastage in fisheries has been a priority of management and research worldwide in recent years. Because of the public perceptions that estuarine gill netting is impacting on fish stocks, in particular causing mortality to sub-legal fish of recreational importance, and for industry to adopt the principles of ecologically sustainable development in the estuarine commercial finfish fishery, there is a clear need to (1) determine the real (as opposed to the perceived) level of discarding in the gill net fishery and how this varies spatially and temporally, and (2) determine the selectivities of the gill nets currently used by commercial fishers. If the anecdotal reports of large quantities of discards prove correct, and the selectivities of the current gears used are found to be not particularly good, then it would be highly beneficial to all users of the resource that more selective nets be developed. This would greatly assist EGMAC in developing a responsible management plan for the fishery. This in turn would help the commercial fishing industry in promoting itself as being responsible harvesters of the resource and would go along way to ameliorating the large amount of conflict among interest groups, as well as having long-term benefits to the resource and to all users of the resource.

Objectives

1. Identify and quantify the rates of retained and discarded catches from the different types of gill nets used in the NSW estuarine commercial finfish fishery.

Development of discard-reducing gears and practices in the estuarine prawn and fish haul fisheries of NSW

Project number: 1997-207
Project Status:
Completed
Budget expenditure: $546,034.00
Principal Investigator: Charles A. Gray
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 22 Jun 1997 - 13 Aug 2002
Contact:
FRDC

Need

Whilst public consternation may be sufficient reason for fisheries managers and scientists to seek solutions to this issue, there are also many biological and economic reasons for doing so. Firstly, there is a clear need to determine the real (not just perceived) level of the problem and how it varies in space and time and among particular fishing methods. If the anecdotal reports of large quantities of juvenile fish being discarded prove correct (addressed in the first stage of the proposed project), and if we can ameliorate such discarding (addressed in the second stage), there would be obvious large and long-term benefits to all interacting recreational and commercial fisheries targetting these species. Further, reducing discards from prawn and fish hauling will improve the efficiencies of these operations and could improve the quality (and even the quantity) of the product - especially in the case of prawn hauling.

The consequences of not completing this study could be substantial. It is possible that in the absence of information, a ban may be inevitable.

Objectives

1. To identify and quantify the by-catch, discards and landed catches from prawn and fish hauling at a variety of locations throughout NSW using a stratified, randomized observer-based survey
these data will be used to determine key gears, methods, areas and times of discarding that will be addressed in Objective 2.
2. To develop, test and implement modifications to current hauling gears and fishing practices that will decrease the identified problematic discards.