19 results
Environment
Environment
Environment
PROJECT NUMBER • 1993-093
PROJECT STATUS:
COMPLETED

Development of biological tagging techniques for penaeid prawns

The objective of this project was to develop novel biological tags for penaeid prawns. The impetus for this research was the growing interest in Australia in the potential for stock-enhancement of penaeid fisheries with hatchery reared juveniles. In any stock- enhancement program some...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 2016-047
PROJECT STATUS:
COMPLETED

Addressing knowledge gaps for studies of the effect of water resource development on the future of the Northern Prawn Fishery

Overview The objectives of this project were to use historical data and derived knowledge from banana prawn research in the Gulf of Carpentaria (GoC) to identify knowledge gaps and examine estuarine juvenile banana prawn abundance in a subset of Gulf estuaries where water development is...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 2004-024
PROJECT STATUS:
COMPLETED

Variation in banana prawn catches at Weipa: a comprehensive regional study

Since about the year 2000 there have been very low catches in the Weipa Region of the Northern Prawn Fishery (NPF); these low catches were different to other areas of the NPF where they continued to fluctuate around long-term means and continued to fall within predicted levels. Industry and managers...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart

Location and transport of early life stages of dhufish (Glaucosoma hebraicum)

Project number: 2011-016
Project Status:
Completed
Budget expenditure: $292,372.00
Principal Investigator: John Keesing
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 30 Sep 2011 - 14 Oct 2012
:

Need

Dhufish is one of the most commercially and recreationally important finfish in Western Australia. Together with pink snapper it accounts for almost half of the commercial catch of the west coast demersal scalefish. Recently, commercial and recreational fishers reported that they moved further offshore to catch dhufish suggesting heavy fishing in nearshore areas and the threat of overfishing offshore amplified with increasing use of GPSs. Another concern is a drop in the maximum observed age of dhufish by 9 years from 41 to 32 years old and a decrease in the proportion of dhufish > 13 years of age in the catches from 28 to 9% over the last decade. The limited knowledge of this species points to very limited dispersal over its range enhancing concerns about the vulnerability of dhufish to overexploitation. Understanding the physical and biological processes that underpin recruitment success in dhufish is of key importance to making predictions about the future productivity and management of the fishery. Recent research indicated that the recruitment strength will depend on spawning output of adults, oceanographic conditions and food availability during the planktonic stage. Lack of knowledge of location and transport of eggs and larvae fundamentally limits understanding of the recruitment of dhugfish. The project aims at locating the early life stages and their transport areas such that sustainability for this species can be pursued.

Objectives

1. Finding early life stages
2. Unravelling transport areas of eggs and larvae and correlating it with physical and biological processes
3. Predicting larval sources and sinks and relating it to currents, salinity, temperature, chlorophyll and food

Final report

Authors: Joanna Strzelecki Ming Feng Oliver Berry Liejun Zhong John Keesing David Fairclough Alan Pearce Dirk Slawinski Nick Mortimer
Environment
Environment
PROJECT NUMBER • 1997-108
PROJECT STATUS:
COMPLETED

Definition of effective spawning stocks of commercial tiger prawns in the NPF and king prawns in the eastern king prawn fishery: behaviour of post-larval prawns

To effectively manage most fisheries, including penaeid prawn fisheries in northern and eastern Australia, it is important to know the relationship between the size of the spawning population and the number of young adults that recruit to a fishery in the next generation. In the tiger prawn fishery...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
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