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QUESTION 3 (4 marks) Over the past 10 years aquaculture has been increasingly used to produce seafood for Australian and export markets. The figure below shows the gross value of aquaculture production in Australia for 2005-06 and 2015-16. 700 000 o 7 7 400 000 e D2 5 N e N A A .55 s s R N e o S 5 A e e TS o T S i T i £ g e 1T B e S S P T e S G ity o V .................................................................................... |:| 2005—06 |- —— Value ($) 1V e Other Rock Prawns Salmon- Abalone Tuna Oyster Crab Scallop Squid lobster ids Species Identify two trends shown in the data and give reasons for the associated value of aquaculture production in Australia. 1. oA
QUESTION 15 (3 marks) The figure below shows the Northern Prawn Fishery data for blue endeavour prawn spawning stock biomass (SSB) and spawning stock biomass at maximum economic yield (SBygy). The timeline of implementation of a management plan is shown below: e 1977 — first management plan e 1987 — mid-season closure with restrictions e 2000 — target set for a spawning stock biomass that produces maximum sustainable yield (MSY) e 2004 — target set for a spawning stock biomass that produces maximum economic yield (MEY) 200 —— SSB/SB zy % 909 \ /N SN e Target reference point 100 ........................................................................................................................ SSBISB . % 50 1973 1979 1985 1991 1997 2003 2009 2015 Year From the above information appraise the adoption of the maximum economic yield model for this fishery.
QUESTION 13 (2 marks) Identify two features of current commercial aquaculture that limit its ability to address food security. 1. 2.
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