Development of techniques for presenting management strategy evaluations to stakeholders

This project was funded by the New Zealand Seafood Industry Council (SEAFIC) Output includes : Participation in the xxx workshop Hobart Jan 2004

Stock Assessment of the New Zealand Rock Lobster Fishery 2002-03

Trophia is contracted by the New Zealand Rock Lobster Industry Council (NZRLIC) to undertake stock assessment research on New Zealand’s rock lobster fishery for the Ministry of Fisheries. Generalised linear models are used to summarise temporal and spatial trends in the catch rates of lobsters. Trophia is assisting in the development of a size structured population dynamics model for rock lobster stocks in New Zealand. This model will enable estimation of population… Read More

Stock assessment of barracouta

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to carry out stock assessments of barracouta, including estimating biomass and sustainable yields. The specific objectives for this project include: 1. To determine the relationship between barracouta on the East Coast and West Coasts of the South Island and with the stock in BAR 5. 2. To carry out stock assessment of barracouta (BAR 5) including estimating biomass and sustainable yields…. Read More

Characterisation of the Alfonsino fishery in BYX 3

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to characterise the alfonsino (Beryx splendens ) fishery by analysis of existing commercial catch and effort data and data from other sources; and make recommendations on appropriate methods to monitor or assess the status of this fishstock. The specific objectives for this project include: 1. To characterise the BYX fishery by analysis of existing commercial catch and effort data and data… Read More

New Zealand Rock Lobster Industry Voluntary Logbook Programme

Rock lobster fishers in many parts of New Zealand keep logbooks in which they record the size, sex and stage of maturity for the lobsters they catch. Currently logbook data is used in the stock assessment process and to generate annual summaries to participants. The extensive nature of the logbook sampling provides data that is more representative of the catch than intensive research sampling. As a consequence, the new size-structured model, used… Read More

Stock Assessment of the New Zealand Rock Lobster Fishery 2001-02

Trophia is contracted by the New Zealand Rock Lobster Industry Council (NZRLIC) to undertake stock assessment research on New Zealand’s rock lobster fishery for the Ministry of Fisheries. Generalised linear models are used to summarise temporal and spatial trends in the catch rates of lobsters. Trophia is assisting in the development of a size structured population dynamics model for rock lobster stocks in New Zealand. This model will enable estimation of population… Read More

Rock Lobster Reproductive Success

Trophia Ltd. was commissioned to examine the available catch sampling data for evidence of changes in the reproductive success of rock lobster populations. Rock lobsters mate in late spring and early winter and females brood the fertilised eggs through the winter months. Since 1952, there has been a prohibition on the taking of egg bearing (“berried”) females to protect the fertilised eggs. Higher market prices during winter have resulted in most quota… Read More

Crustacean Stock Assessment in Namibia

During 1999, Nokome Bentley of Trophia took part in a workshop in Namibia, which aimed to: Review and assess research methods used at present in the lobster and crab research program and recommend alternative methods where necessary. Review and Assess the Namibian lobster and crab database as well as methods of data analysis. Assess the population models presently used in the Namibian crab and lobster stock assessment and test alternative models (also… Read More

Assessment of the trade in live reef fish in the Indian Ocean

In early 1998, the International Marinelife Alliance and the World Resources Institute launched the Destructive Fishing Reform Initiative. The objective of the Initiative is to protect Indo- Pacific coral reefs of outstanding significance from cyanide and other forms of destructive fishing, prevent over-harvesting of live reef fish trade target species, and to establish durable and sustainable reef management policies and practices. The purpose of this project was to provide an overview of… Read More

Stock Assessment of the New Zealand Rock Lobster Fishery

Trophia is contracted by the New Zealand Rock Lobster Industry Council (NZRLIC) to undertake stock assessment research on New Zealand’s rock lobster fishery for the Ministry of Fisheries. Generalised linear models are used to summarise temporal and spatial trends in the catch rates of lobsters. Trophia is assisting in the development of a size structured population dynamics model for rock lobster stocks in New Zealand. This model will enable estimation of population… Read More