| Resources |
 |
New
Zealand fish catch histories and quota levels |
|
Marine
fisheries research |
|
Fishing
methods |
|
History
of fishing in New Zealand |
|
Background
information |
 |
| Selected
answers |
| 4 |
Patterns
of Catch |
| |
c |
Some
early quotas were worked out by averaging recent catches
and, where appropriate, reducing them for safety. |
|
d |
When
the QMS was introduced, reductions in quota were made
where catches were declining and where catches had risen
steeply for only a few years prior to 1986, ie, when sustainability
was in doubt. |
| |
e |
Other
information needed to determine reliable quota includes
biological information about the productivity of a species
and trends in catch-per-fishing-effort. |
| |
f |
There
are seasonal peaks in snapper, school shark and squid
catch. |
| |
g |
Snapper
and squid |
| |
|
1 |
Snapper
catches have a strong seasonal peak. |
| |
|
2 |
The
similarity between squid and snapper catches is that both
have a strong seasonal peak. The differences are: |
| |
|
|
|
Snapper
is caught in spring and squid in summer and autumn. |
| |
|
|
|
Snapper
is a spawning aggregation; squid is a gradual build up
of biomass, plus some spawning aggregation component. |
| |
|
|
|
Snapper
survive for many years (up to 60), but most if not all
squid die after their annual aggregation. |
