Characterisation of sea perch fisheries

Trophia has been contracted by the NIWA To characterise and monitor sea perch (SPE) stocks in New Zealand waters

Characterisation of frostfish fisheries

Trophia has been contracted by the NIWA To characterise and monitor frostfish (FRO) stocks in New Zealand waters

Characterisation & CPUE analysis of FLA1 and GMU 1

Trophia has been contracted by the New Zealand Ministry of Fisheries to monitor the relative abundance of grey mullet (Mugil cephalus) in GMU 1, and flatfish in FLA1.: To characterise the GMU 1 and FLA 1 fisheries. To update the standardised CPUE index for grey mullet (GMU1) and flatfish (FLA1), with the inclusion of data up to the end of the 2009/2010 fishing year. GMU 1 and FLA 1 are divided into… Read More

Stock-specific harvest decision rules for the John dory (JDO 7), red gurnard (GUR 7), and snapper (SNA 7) fisheries within the Challenger Fisheries Management Area

Trophia has been funded by MFish to Develop stock-specific harvest decision rules for the John dory (JDO 7), red gurnard (GUR 7), and snapper (SNA 7) fisheries. SPECIFIC OBJECTIVES: Develop a harvest decision rule for the JDO 7 fishery using fisheries dependent and independent information to manage biomass at the long-term average and take advantage of periods of higher than average biomass. Develop stock specific harvest decision rules for the GUR 7 and… Read More

Monitoring rig fisheries in SPO 1 and SPO 8

Trophia was contracted by the New Zealand Ministry of Fisheries to continue monitoring changes in the rig fisheries and the relative abundance of rig (Mustelus lenticulatus) stocks in SPO1 and SPO8. Specific objectives for the project were: To characterise the SPO 1 and SPO 8 fisheries. To update the SPO 1 and SPO 8 standardised CPUE series to the 2009/10 fishing year. Following the introduction of rig to the QMS in 1986, landings of… Read More

Catch per unit effort analysis of the commercial blue cod fishery in BCO 4

Trophia has been contracted by the New Zealand Ministry of Fisheries : To characterise the BCO 4 fishery To analyse CPUE trends in commercial BCO 4 fishery up to the end of 2008/2009 The South East Chatham Rise BCO 4 fishery may once have been a labour intensive handline fishery,but blue cod are now taken mostly by cod pots. Before the introduction of the QMS, there were economic constraints to the development… Read More

Fishery characterisation and CPUE analysis of GUR 1 and 2

Trophia has been contracted by the New Zealand Ministry of Fisheries : To characterise the GUR 1 and GUR 2 fisheries. To analyse existing commercial catch and effort data to the end of 2008/09 fishing year and undertake a CPUE standardisation. Annual landings of GUR 1 have been relatively stable since 1986–87, generally ranging between 900 and 1300 t; substantially lower than the 2287 t TACC. About 60% of the GUR 1 total is… Read More

Approaches for determining in season TAC increases for 2nd Schedule stocks

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to characterise the inshore fisheries in FMA 2 and identify abundance indices for the key species . The specific objectives for this project include: 1. To examine approaches for determining in-season TAC increases in FLA and RCO stocks. When providing for in-season or pre-season TAC changes it is not enough to simply be able to predict that, based on historic… Read More

Relative abundance of troll-caught albacore

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to determine the relative abundance of juvenile albacore (Thunnus alalunga) in New Zealand fisheries waters. . The specific objectives for this project include: 1. To update standardised CPUE for the west coast albacore troll fishery using data up to the end of the 2007-08 fishing year. Albacore caught by troll in New Zealand waters are juveniles of a single South… Read More

FLA 1 setnet CPUE standardisation

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to determine the relative abundance of flatfish in FLA 1. The specific objective for this project include: 1. To characterise the FLA 1 fishery and update the CPUE analyses for setnet fisheries in FLA 1 using data up to the end of 2007-08 . For management purpose nine species of flatfish (black flounder (BFL), brill (BRI), New Zealand sole (ESO),… Read More