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The Effect Of Recreational Fishing On Targeted Fishes And Trophic Structure, In A Coral Reef Marine Park, Mark B. Westera
The Effect Of Recreational Fishing On Targeted Fishes And Trophic Structure, In A Coral Reef Marine Park, Mark B. Westera
Theses: Doctorates and Masters
Recreational line fishing is highly targeted at predatory fishes, making them vulnerable to overfishing. These same fishes play a role in trophic structure by regulating prey species. Despite increasing numbers of fishers, few studies have investigated the potential effects of recreational fishing on fish populations and subsequent trophic effects. This project investigated whether there were differences in fishes and benthos between unfished and recreationally fished areas, and whether the removal of targeted fishes influenced trophic structure. The study was conducted at the Ningaloo Marine Park, Western Australia, which had Sanctuary (no-take) and Recreation {recreationally fished) Zones. Data were collected from …
Time Series Modelling Of The Environmental Factors Affecting The Daily Catch Rate Of Western Rock Lobster, Sukanlaya Srisurichan
Time Series Modelling Of The Environmental Factors Affecting The Daily Catch Rate Of Western Rock Lobster, Sukanlaya Srisurichan
Theses: Doctorates and Masters
The western rock lobster fishery is one of the most significant and valuable single species fisheries in Australia and in the world. It generates a gross commercial value of $200-300 million dollars per year for the economy of Western Australia. The impact of environmental factors on the daily catch rate of the western rock lobster is of particular interest to the W.A. Marine Research Laboratories, at the Ministry of Fisheries, Western Australia. Considerable time and effort has been invested into building and developing suitable models to measure such impact on this fishery. While past research has focussed on monthly or …
Evaluation Of Revegetation Techniques Used On Degraded Agricultural Land In The Central Avon Catchment, Western Australia, Scott J. Bartholomew
Evaluation Of Revegetation Techniques Used On Degraded Agricultural Land In The Central Avon Catchment, Western Australia, Scott J. Bartholomew
Theses: Doctorates and Masters
The agricultural region in the central Avon catchment is declining in both arable land and native vegetation. This decline has been due to the clearance of large tracts of native vegetation and its subsequent replacement by exotic crops and pasture species. The loss of vegetation has led to regional land degradation in the form of soil erosion and land salinisation. Therefore, changes in land management practices are required to make agricultural production more compatible with land conservation. Revegetation using native plants is the only management solution that integrates both land and ecological conservation with agricultural productivity. The continuation of current …
Modelling And Risk Analysis Of The Western Rock Lobster (Panulirus Cygnus) Fishery Of Western Australia, C. S. Yap
Theses: Doctorates and Masters
The predictive power for short-term forecasting of selected biomass dynamic models was examined using the standardised catch and effort data from the 1944/45 to 1990/91 season of the western rock lobster. Risk analysis of the fishery based on the predicted fishing efforts with the Deriso-Schnute delay-difference model indicates a high probability of recruitment failure. Some hypothetical management strategies of reducing fishing effort were evaluated by taking into consideration the total catch and biological risk to the fishery.
Comparative Evaluation Of Commercially Grown Lupin And Mung Sprouts, Sant B. Kaur
Comparative Evaluation Of Commercially Grown Lupin And Mung Sprouts, Sant B. Kaur
Theses: Doctorates and Masters
More than one million tonnes of lupin seed are produced per annum in Western Australia. Lupin can be considered as an alternative to staple pulse food items such as soybeans, peas, chick peas and mung beans. This research was designed to provide potential investors with objective scientifically obtained evidence of the feasibility, and marketing potential, of using lupin as a basis for the commercial development of value added foods, in this case commercially grown lupin sprouts. Sprouts were selected because sprouted lupins are comparable with mung bean sprouts, the market leader, as regards yield and consumer acceptance as a food …