Trans RINA, Vol 156, Part B2, Intl J Small Craft Tech, Jul-Dec 2014
ENERGY USE OF FISHING VESSELS OPERATING IN TASMANIA (DOI No: 10.3940/rina.ijsct.2014.b2.150)
A Bishop, C K H Chin and G Thomas, Australian Maritime College, University of Tasmania, Australia SUMMARY
This paper investigated the fuel consumption of fishing vessels operating within the southern rock-lobster fishery and the south-eastern shark and scalefish fishery in Tasmanian waters. This was undertaken by sending a questionnaire to operators surveying different vessels and estimating the vessels’ efficiency. The estimated yearly efficiency was checked using a one sided t-test and a 95% confidence interval. Using this efficiency the fuel consumption for the 2011 calendar year for southern rock-lobster and SESSF long-line vessels was estimated to be between 1.12 to 1.6 ML and between 0.70 to 0.80 ML respectively. To reduce this fuel consumption, different engineering solutions such as removal of bilge keels, service speed reduction and addition of bulbous bow were investigated, and it was found that vessels could reduce their fuel consumption by 5 to 20%.
NOMENCLATURE [Symbol]
ML x
s n
H 0 H a
[Definition] [(unit)] Mega litres (ML)
Sample mean (kg/L) True mean (kg/L)
Sample standard deviation Sample size
Null hypothesis Alternative hypothesis ABBREVIATIONS
AFMA BSCZ
DPIPWE
HREC SESSF
1.
Australian Fisheries Management Authority Bass Strait Central Zone
Department of Primary Industries, Parks, Water and Environment Human Research Ethics Committee South Eastern Shark and Scalefish Fishery
INTRODUCTION
Commercial fishing can be an energy-intensive process where fuel cost can account for up to 30% of business costs [1]. Due to this high cost percentage, commercial fishing is very sensitive to sudden rises in fuel cost. Also the large decline in catch rate in some fisheries could potentially make those fisheries unviable for operators to continue participation.
Previous studies on the fuel usage of fishing vessels have used two different approaches.
The first approach was the application of an energy audit in accordance with Australian Standard AS/NZS 3598:2000 or similar standard. This method has been applied in previous research to the following vessels: Point Cloates, a prawn trawler operating in the Exmouth Gulf Prawn Fishery [2], Anna Louise, a Danish seine trawler operating in the south-eastern shark and scalefish fishery [3], Moria Elizabeth, a trawler
operating in the south eastern shark and ©2014: The Royal Institution of Naval Architects
The second approach to determine fuel use of fishing vessels was the application of a life-cycle assessment. This method looks at the energy use throughout the steps involved in the production of a product and the emissions produced, or energy used, at each stage of production. This method has been applied in previous research to the production of frozen cod fillets from fish caught in the Baltic Sea by Swedish trawling and gillnet vessels [5]; Danish fish products from fish landed by either beam, bottom or Danish-siene trawlers [6]; Purse-seine tuna vessels fishing in Indian, Pacific and Atlantic tuna fisheries based in the port of Galicia in Spain [7], and summarising the energy use of different fishing methods and fisheries in the North Atlantic and North Pacific oceans using data gathered from the early 1980s to late 1990s [7]. These studies found that 440 litres of diesel is consumed per tonne of tuna landed, 740 grams of crude oil is consumed per 400 grams of frozen cod produced and the fisheries energy use data is summarised in [8]. However, the research done by Wakeford [2], Bloomfield [4] and O’Doherty et al. [3] only focused on one or two vessels in isolation and only covered two vessels, Moria Elizabeth and Anna Louise, from the south-eastern
research undertaken by Ziegler et al. [5] and Hospido and Tydedmers [7] covered different
The aim of
shark and scalefish fishery. Also the target
species.
Therefore more data is required to create a clearer picture of energy usage for fisheries in Tasmanian waters.
this research is to estimate the fuel
consumption of the fishing vessel fleet and suggest engineering solutions for vessel operators to reduce fuel consumption.
scalefish fishery [2], Night Stalker, a rock lobster vessel operating in Western Australia [2], Flying Fish IV, a fish-trap boat operating in the Pilbara fish-trap fishery [2], Torbay, a trawler operating in the Pilbara trawl fishery [2] and Karmin, a rock-lobster vessel operating in Tasmania [4]. The studies of these vessels found catch in kilograms per litre of fuel varying between 0.57 and 1.28 kg/L for trawlers, 0.32 and 0.58 kg/L for the rock-lobster vessels, and 1.02 and 1.55 kg/L for the fish-trap vessel.
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