Revision Flashcards
Why Australia towards the bottom of the world is fishing nations?
Due to our oceans are generally low in nutrients and not very productive
What is our highest priced seafood exported overseas?
Abalone
How many commerical fishing boats do we have in Australia?
Approx. 9000
What percentage of the world’s fish stocks are declining or at their limits of sustainability?
15%
How can fish population be reduced?
Fish populations can be reduced due by over fishing the populations and not by letting the fish reproduce.
What model seeks to identify the number of fish that can be caught with maximum profit?
The size of the fish when it becomes sexually matured
Which Australian Fishery is considered to be one of the best managed fisheries in the world
Western rock lobster yield
What is considered the most destructive fishing technique to sea floor communities?
Nets
Which two countries are the largest aquaculture procedures in the world?
South America and Asia
What is the type of aquaculture carried on in natural waterways like rivers and lakes is called?
More than 1 species cultured in 1body of water
What features idenify good brood stock?
Fish with no genetic diseases
What is the most expensive component of an intensive aquaculture facility? Food ($15,000 per day)?
Pod $15000 per day
Explain why Australia exports much of its seafood overseas yet imports large quantities of seafood from other countries like New Zealand?
We have a 200nm in total where only Australia can fish.
Describe how the gill net actually catches the fish.
They are set up with keratin size holes so that when the fish swim through the gills beside their head gets caught and stuck.
What is the purpose of tagging fish?
To estimate population size and to watch where they go to breed
