Acoustic Telemetry for Critically Endangered Guitarfish Species
1 year (July 2022 – July 2023)
Cyprus is a potential critical area for two threatened species of guitarfish; the blackchin guitarfish (Glaucostegus cemiculus) and the common guitarfish (Rhinobatos rhinobatos). According to local knowledge and citizen science data, they are commonly captured as bycatch in recreational fishing such as rod surfcasting. Unfortunately, there is lack of awareness among stakeholders and especially fishers about guitarfish, its importance, and the threats that they face globally. This project aims to advance our knowledge of these critically endangered species, specifically within Cypriot waters. To do this, we will internally tag individuals at different life stages with acoustic transmitters (Vemco V9-2x-BLU-1 and V13-1x-BLU-1). This will be in collaboration with local fishers using the beach casting technique.External spaghetti ID tags are being inserted on all guitarfish caught, especially important for recently born juveniles which are too small for internal tagging.Eighteen acoustic receivers (Vemco VR2Tx-69 kHz) are being set up to track the guitarfishes’ movements. This is the first acoustic telemetry network in Cyprus. An additional goal of the project is to determine the long range connectivity of other tagging operations elsewhere in the Mediterranean (e.g. Israel) as our receivers can also detect their tagged specimens.
This network will help to demonstrate that selected locations are critical areas and potential nursery grounds for guitarfish in Cyprus. Our project will develop a deeper understanding about guitarfish ecology, migrations and spatiotemporal movements within the study area. This will provide the necessary actionable knowledge to spearhead future research into these species with the end goal of protecting their remaining populations within Cypriot waters.
The tagging procedure is conducted according to the DIRECTIVE 2010/63/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 22 September 2010 on the protection of animals used for scientific purposes, and REGULATION (EU) 2019/1010 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 5 June 2019.