Fisheries topics

IN173 Fisheries research in local communities

(start dates 13 June or 27 June)

Opwall have been working with local fishing communities in the Wakatobi for almost 20 years, developing a deep understanding of the conservation issues associated with declining fish stocks and producing several award winning dissertations along the way. Opportunities exist for students to build on this extensive experience by completing dissertation projects focusing on artisanal fishing pressure by working alongside Opwall staff and local Indonesian partners in small fishing communities on and around Kaledupa island. To talk about this opportunity, and how it might be suitable for your undergraduate or masters dissertation research, please email Dr Dan Exton:

HO113 Managing the Caribbean lionfish invasion

(start dates 14 June, 21 June or 28 June; need to be dive trained and to have completed the Caribbean reef ecology course)

This project has a waiting list

Lionfish are an invasive species in the Caribbean and are having a devastating impact on local fish communities throughout the region. Introduced in the 1980s, believed to be by accident, lionfish have spread extremely quickly and are now found as far as New York City and Brazil. Their success is down to a number of factors, including their high reproductive rate, generalism in terms of both diet and habitat, and a lack of natural predators. They are now considered to be one of the greatest threats to the future of Caribbean coral reefs and their fish communities. Management approaches to dealing with the lionfish invasion are limited, with one of the most common being direct removal via spear fishing. This relies on regular visitation to individual reef sites, as studies have shown full recovery of lionfish populations only five months after complete removal. Baseline data will be collected on population densities of lionfish at sites of varying intensities of culling. Lionfish will subsequently be removed and morphometric measurements taken along with dissections for physiological and gut content assessments, which can link fish assessments to gauge prey availability. In addition, lionfish behavioural responses to divers, such as Flight Initiation Distance (FID) and Alert Distance (AD) can be assessed, which could also be expanded to include commercially valuable fish such as grouper.

Extended Project Summary

PE153 Potential impacts of climate change on sustainable fishing resources for the Cocama indigenous people

(start dates 11 June or 25 June)

The fish populations of the Pacaya-Samiria Reserve are a vital resource for the local Cocama people, making up to 70% of the protein in their diet. Fund Amazonia and Opwall have been monitoring the fish populations of the Pacaya-Samiria Reserve for eight years and have seen dramatic fluctuations in abundance and diversity in response to changing water levels. This means there is huge potential for continuing climate fluctuations to affect the fish community and hence the people who depend on them for their livelihood. This project could combine studying the fish abundance and diversity responses to climate change using the long-term datasets, coupled with the sociological impact of these changes on the local indigenous people. Fish sampling is carried out using 30m x 3m gill nets with 3 inch mesh and fished for as close to one hour as possible. The fishing locations are chosen by our local guides to imitate the genuine fishing conditions of local people. Sociological data regarding how the changing fish populations are affecting the type of fish eaten, the amount of time spent fishing and the fishing methods being used could be collected by interviewing local guides and by organised visits to nearby Cocama villages.

Extended Project Summary