Stock assessment of TRE 7

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to conduct a stock assessment for trevally (Pseudocaranx dentex) in TRE 7, including estimating biomass and sustainable yields. The specific objectives for this project include: 1. To update the descriptive analysis of the TRE 7 fishery up to the end of the 2007/08 fishing year. 2. To review and summarise the historical biological and other relevant data (including length frequency,… Read More

Adaptive Management Programme proposals and monitoring

Trophia is contracted by the New Zealand Seafood Industry Council (SeaFIC) to assist with analyses required under the the adaptive Management Programme. The adaptive Management Programme (AMP) was introduced in 1991 by the NZ Ministry of Fisheries (MFish) as a basis for varying the levels of Total Allowable Commercial Catch (TACC) of fishstocks for which there is limited information on stock size. New proposals include a descriptive analysis of current knowledge and… Read More

Characterisation of the New Zealand tuna fisheries

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to To characterise the New Zealand tuna fisheries, including catches of important associated tuna like species. The specific objectives for this project include: 1. To characterise the New Zealand tuna fisheries for albacore (Thunnus alalunga), bigeye tuna (T. obesus), Pacific bluefin tuna (T. orientalis), skipjack tuna (Katsuwonus pelamis), southern bluefin tuna (Thunnus maccoyii), yellowfin tuna (T. albacares), and swordfish (Xiphias… Read More

Monitoring red gurnard in GUR 1

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to characterise the red gurnard (Chelidonichthys kumu) fishery in GUR 1 and undertake a CPUE analysis in GUR 1 . The specific objectives for this project include: 1. To characterise the GUR 1 fishery by analysing existing commercial catch and effort data and data from other sources; and to make recommendations on appropriate methods to monitor or assess the status… Read More

Adaptive Management Programme proposals and monitoring

Trophia is contracted by the New Zealand Seafood Industry Council (SeaFIC) to assist with analyses required under the the adaptive Management Programme. The adaptive Management Programme (AMP) was introduced in 1991 by the NZ Ministry of Fisheries (MFish) as a basis for varying the levels of Total Allowable Commercial Catch (TACC) of fishstocks for which there is limited information on stock size. New proposals include a descriptive analysis of current knowledge and… Read More

Relative abundance of red gurnard in GUR 2

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to monitor the abundance of red gurnard (Chelidonichthys kumu) GUR 2 using Catch and Effort data. . The specific objectives for this project include: 1. To update the standardised CPUE indices for GUR 2 using data up to the end of 2004/2005. Relative abundance of this Fishstock is monitored using the age structure of the catch (2-3 years in every… Read More

Relative abundance of tarakihi in TAR1

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to monitor the abundance of TAR 1 using Catch and Effort data. The specific objective for this project : 1. To update the standardised CPUE indices for TAR 1 using data up to the end of 2003/2004. This project was funded by MFish project TAR2004-02 Output includes presentation of results to the Ministry of Fisheries Inshore Stock Assessment Working Group meetings,… Read More

Adaptive Management Programme proposals and monitoring

Trophia is contracted by the New Zealand Seafood Industry Council (SeaFIC) to assist with analyses required under the the adaptive Management Programme. The adaptive Management Programme (AMP) was introduced in 1991 by the NZ Ministry of Fisheries (MFish) as a basis for varying the levels of Total Allowable Commercial Catch (TACC) of fishstocks for which there is limited information on stock size. New proposals include a descriptive analysis of current knowledge and… Read More

Characterisation of the New Zealand tuna fisheries

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to To characterise the New Zealand tuna fisheries, including catches of important associated tuna like species. The specific objectives for this project include: 1. To characterise the New Zealand tuna fisheries for albacore (Thunnus alalunga), bigeye tuna (T. obesus), Pacific bluefin tuna (T. orientalis), skipjack tuna (Katsuwonus pelamis), southern bluefin tuna (Thunnus maccoyii), yellowfin tuna (T. albacares), and swordfish (Xiphias… Read More

Investigation of potential improvements to the TRE 7 stock assessment

The Ministry of Fisheries research project “TRE 2001/02 Stock assessment of trevally in TRE 7″ was completed by Trophia and included an analysis of CPUE and stock assessment modelling. The results were presented to the Pelagic Fisheries Assessment Working Group in February 2003. In reviewing the results of the project, the WG identified two areas where additional work was needed: The high inter-annual variability in CPUE The potential for age-specific mortality The… Read More