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Activity
A: fish - an introduction - Q4
| Resources |
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Life
under the ocean wave |
|
Fish
characteristics |
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Orange
Roughy: delicacy from the deep |
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| Selected
answers |
| 4 |
Fish
in New Zealand waters |
| |
a |
Temperature
of water, their habitat, pollution, tides, currents, nutrients,
salinity, depth, etc. These influence availability of
food, success of spawning, presence of algal blooms, etc. |
|
b |
Many
deepwater fish have big eyes and dark colouring. Large
eyes are to compensate for poor light; even, dark colouring
for camouflage. Some have light organs to attract prey. |
| |
c |
Fish
live in shallow, coastal or oceanic waters and can be
further categorised by whether they live in surface waters
(pelagic fish), middle depths, or are bottom dwelling
(demersal). |
| |
d |
Research,
keeping fishing to a moderate level so that stock is not
overfished in poor years, changing the regulations governing
fishing quickly to adapt to altered conditions. |
| |
e |
Students
may have included: NZ has a very large EEZ, our fisheries
resources are not productive by world standards, many
of our fish are long-lived and we have multi-species fisheries,
earning over $1 billion a year in export revenue. |
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