139 results

Predicting the impact of hook decrements on the distribution of fishing effort in the ETBF

Project number: 2008-028
Project Status:
Completed
Budget expenditure: $130,865.00
Principal Investigator: Chris Wilcox
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 29 Sep 2008 - 30 Jun 2009
Contact:
FRDC

Need

AFMA recently announced the completion of amendments to the ETBF management plan, and the call for applications for statutory fishing rights. These fishing rights, and the effort allocation of effort that accompanying them, will be managed using Spatial Area Factors (SAFs). SAFs are multipliers that translate the actual amount of fishing effort expended, e.g. in thousands of hooks, into the amount of effort units that are taken off an SFR holders allocation. The intent of these SAFs is to allow spatial management of the fishery, by providing incentives for fishing in areas with low SAFs and disincentives in areas with high SAFs. If used effectively, these SAFs may provide a mechanism for reducing many of the management conflicts in the fishery, such as catch of seabirds and turtles, local depletion of target stocks, and under-exploitation of high seas areas. However, in order to effectively apply the SAFs, AFMA will need to be able to determine the motivational effect of the SAF on fishermen's location choices. Moreover, the SAFs will affect the total allowable effort (TAE) that is actually realized in the fishery in a given year, so not only will they affect individual fishers, they will also affect the performance of the fishery as a whole. It will be critical to be able to make some predictions about how the realized TAE will change, based on the structure of the SAFs in order to weigh alterative management options prior to implementing them. Finally, a move from TAEs to TACs and ITQs will substantially affect the structure of the fishery. Although we will not directly address those changes in this proposal, the behavioral models developed in this project would be rapidly adaptable to a TAC/ITQ system, and could form a basis for informing management as to the potential effects.

Objectives

1. Develop a statistical (multivariate logit) model to predict the distribution of fishing effort in the ETBF
2. Develop a process (a state-dependent behavioral) model of effort allocation for an input managed fishery with individual effort allocations
3. Evaluate the impact of a series of SAF scenarios on the distribution of fishing effort in the ETBF using statistical and state-dependent behavioral models
Environment
Environment
PROJECT NUMBER • 1993-077
PROJECT STATUS:
COMPLETED

Quantitative interpretation of fine-scale SBT catch per unit effort for south east Australia

An analysis of spatial and temporal variations in catch rates of Southern Bluefin Tuna (SBT) in relation to environmental factors was conducted for the region south of Tasmania up to 1he southern half of New South Wales. Substantial temporal and spatial variations were evident in...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Industry
Environment
PROJECT NUMBER • 2012-021
PROJECT STATUS:
COMPLETED

Trial and validation of Respondent-Driven Sampling as a cost-effective method for obtaining representative catch, effort, social and economic data from recreational fisheries

The objective of FRDC project 2012/021, “Trial and validation of Respondent-Driven Sampling as a cost-effective method for obtaining representative catch, effort, social and economic data from recreational fisheries” was to trial and validate the chain referral sampling method,...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart

RFIDS: a coordinated national data collection for recreational fishing in Australia

Project number: 2011-036
Project Status:
Completed
Budget expenditure: $475,000.00
Principal Investigator: Shane Griffiths
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 14 Jul 2011 - 29 Jun 2013
Contact:
FRDC

Need

In many states and regions around Australia there is a lack of current and reliable recreational fisheries data (e.g. participation rates, catch) that can be used in decision-making processes. Since the stock boundaries of some recreationally-important species can span several State and Federal jurisdictions, reliable stock-specific data is needed. The results of the last national recreational fishing survey undertaken in 2000-2001 are now considered outdated in many respects, or are of limited use for rarely-caught species and some fisheries or regions due to issues of scale.

Since the national survey, various recreational fishing surveys have been undertaken by State fisheries agencies to address their own specific management issues. These surveys have generally been telephone-diary approaches based on the National survey methodology. Additionally, community-based recreational fishing data collection have been undertaken at regional levels by community and recreational fishing groups. However, there has been a lack of coordination between agencies to report at a national level. Therefore, there is a need to assess the feasibility of aggregating data from these surveys to provide reliable up-to-date information at regional and national levels.

Objectives

1. Provide an understanding of the current state of knowledge, and identify information gaps, across the recreational fishing sector at a national scale
2. Explore approaches to filling key information gaps and begin development of system(s) and protocols that will allow data to be stored, aggregated and analysed to answer questions related to recreational fishing in a timely and responsive way
3. Assess the feasibility of aggregating available recreational fishing datasets to provide reliable regional and national information on catch, effort, participation, and social and economic aspects in the recreational fishing sector
Environment
PROJECT NUMBER • 1995-016
PROJECT STATUS:
COMPLETED

The impact of changes in fishing patterns on red-legged banana prawns (Penaeus indicus) in the Joseph Bonaparte Gulf

The fishery for red-legged banana prawns in the Joseph Bonaparte Gulf (JBG) developed in the early 1980s. Since then, fishing effort has varied from 700 to 2600 boat-days per year and catches range from 200 to 1000 tonnes per year. Initially the JBG fishery developed as an alternative to fishing in...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
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