Use of satellite imagery to predict occurrence of spawning aggregations of blue grenadier
Final report
Productivity of tiger prawn nursery areas
Final report
Recruitment processes in commercially important prawn species
Final report
The following report is a description of the two FIR TA projects (85/85 & 89/13) which examined recruitment processes in penaeids at Albatross Bay in the northeastern Gulf of Carpentaria over the years 1985 to 1992. The aim of the first of the two projects was to identify the main factors which control the recruitment of prawns, while the aim of the second project was to build on the results on the first to provide managers with explanations for declines in commercial catches that had been experienced in the fishery.
The work was focused in three main areas: measuring year-to-year variation in numbers of the main life history stages (eggs, larvae, juveniles and adults in the Albatross Bay region) and correlating the abundances with changes in the environment; measuring the year-to-year variation in the extent of predation by fish on juvenile and adult prawns; and examining relationships between commercial fishery catches throughout the Northern Prawn Fishery and meteorological data.
The results of the projects have enabled us to better define the life history dynamics of the banana prawn Penaeus merguiensis and, to a lesser extent, the grooved tiger prawn Penaeus semisulcatus. Life cycles of both species were found to be based on two cohorts per year. Comparison with P. merguiensis life cycles throughout the Indo-West Pacific region has shown that two cohorts per year was the common pattern, and that the relative contribution to offshore commercial fisheries of each cohort in the various regions wa governed to a large extent by the local pattern of rainfall. In the case of P. merguiensis in Albatross Bay, differential mortality results in only one of these cohorts contributing significantly to the commercial fishery.
Exploratory and experimental studies for fish and crustacea in Australian continental slope waters
Investigation of the commercial scallop (Pecten fumata) in Bass Strait
Final report
In 1985, CSIRO applied for funding from the Fishing Industry Research Trust Account to undertake a research program to investigate the commercial scallop (Pecten fumatus) in Bass Strait with the aim of providing resource assessments to guide and assist in the management of the scallop fishery.
It was proposed that in the three year period from 1 August 1985 to 30 July 1988, the program would, (1) examine and analyse all biological and commercial data currently available for the fishery, and (2) initiate a research program to provide the biological data required for the efficient management of the fishery.
The fisheries biology of scampi (Metanephrops spp)
Final report
Scampi, or species of clawed lobsters of the genus Metanephrops, occur on the continental slopes of many countries in the world, however, prior to 1985 were commercially fished only in deep water off south east Africa, Metanephrops andamanicus and experimentally in the western Atlantic Ocean and Caribbean Sea, Metanephrops binghami.
The presence of scampi on the north west slope of Australia was first reported by the survey steamer Investigator in 1891, but it was not until 1985 that a commercial fishery based on three species of scampi (Metanephrops andamanicus, M. australiensis and M. boschmai) was developed.
Thee scant scientific knowledge of these species used to establish initial management plans for the fishery prompted the initiation of a CSIRO research program. This three year research program, which commenced in January 1986, aimed to collect fundamental information on the fisheries biology of these animals in order that a rational long term management strategy for the fishery could be designed.
Direct otolithic ageing of southern bluefin tuna, Thunnus maccoyii (Castlenau), exploited by the Australian fishery
Final report
The biology and ecology of blue grenadier with particular reference to stock recruitment, stock identity and its role in a multispecies fishery
Final report
Second Australian National Prawn Seminar
Proceedings
Since the First Australian National Prawn Seminar in 1973, Australian prawn fisheries have grown in size and value to become Australia's most valuable fisheries resource. In the same period the number of people involved in the fishing industry, research and management has also increased. Major new research centres have been established and several new programs implemented. A wide array of management regimes have been introduced including limited entry, seasonal and area closures coupled with sampling regimes to optimise the size at which prawns are harvested. Recently there has been a resurgence of interest in penaeid aquaculture which has been stimulated by the marked increase in pond production in South America and South East Asia, and the impact the product is having on world markets.
Because of the wide geographic separation of the various Australian prawn fisheries, there is little opportunity for those involved in the industry to meet and discuss topics at the national level. Accordingly it was felt that an update of developments and progress in research, management, economics, marketing, and aquaculture was necessary. We formed an organising committee and obtained funds to cover conference and publication expenses.
The Second Australian National Prawn Seminar was held at Kooralbyn, Queensland from 22 to 26 October 1984.