Aquatic Environment and Biodiversity Annual Review 2012

AEBAR 2012: Appendices: Past projects
NON-PROTECTED BYCATCH continued
Project Code Project Title Specific Objectives Status Citation/s
ENV2005-18 Estimation of non-target
fish catch and both target
and non-target fish
discards in orange roughy
trawl fisheries
ENV2003-01 Estimation of non-target
catches in the hoki fishery
ENV2002-01 Estimation of non-target
fish catch and both target
and non-target fish
discards for the tuna
longline fishery
ENV2001-04 Non-target fish catch and
discards in selected New
Zealand fisheries
ENV2001-05 To assess the productivity
and relative abundance of
deepwater sharks
ENV2001-07 Reducing bycatch in
scampi trawl fisheries
1. To estimate the quantity of non-target fish species caught, and the target and
non-target fish species discarded, in the trawl fisheries for orange roughy for the
fishing years 1999/2000 to 2003/04 using data from Scientific Observers and
commercial fishing returns.
1. To estimate the catch rates, quantity and discards of non-target fish catches
and the discards of target fish catches in trawl fisheries for hoki, using data from
the Observer Programme and commercial fishing returns for the 1999/00 to
2002/03 fishing years.
2. To compare and contrast the estimates from the four years of data in Specific
Objective 1 above with the 1990/91 through 1998/99 series previously reported.
1.To estimate the catch rates, quantity and discards of non-target fish,
particularly oceanic shark species, broadbill swordfish and marlin species,
caught in the longline fisheries for tuna, using data from Scientific Observers and
commercial fishing returns for the 2000/01 and 2001/02 fishing years.
To generate estimates of the catch of non-target fish species, and the discards
of target and non-target fish species in three important New Zealand trawl
fisheries: arrow squid (Nototodarus sloani & N. gouldi), jack mackerel (Trachurus
declivis, T. novaezelandiae, & T. symmetricus murphyi) and scampi
(Metanephrops challengeri)
1. To review the relative abundance, distribution and catch composition of the
most commonly caught deepwater shark species: shovelnose dogfish (Deania
catcea), Baxter's dogfish (Etmopterus baxten), Owston's dogfish
(Cenhoscymnus owstoni), longnosed velvet dogfish (Centroscymnus crepidater),
leafscale gulper shark (Cenhophom quamosus), and the seal shark (Dalatias
ticha).
1. Collate and review the international literature on methods of reducing bycatch
in crustacean trawl fisheries.
2. Review and analyse the data from New Zealand studies.
3. Develop recommendations on future approaches to reducing bycatch in the
New Zealand scampi fishery, including some general thoughts on the
experimental design of field trials.
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Completed Anderson 2009a
Completed Anderson & Smith 2005
Completed Ayers et al. 2004
Completed Anderson 2004
Completed Balckwell & Stevenson 2003
Completed Hartill et al. 2006