Development of a modified fyke net for green crab fisheries
Authors: Farooque, Aitazaz Ahsan; Tang, Skylar
Description: The invasion of the non-indigenous green crab (Carcinus maenas) to estuaries of Prince Edward Island and the Atlantic Region poses a challenge to fisheries management. In order to protect shellfish resources and habitats, green crabs have started to be harvested with fyke (eel) nets. The major problem with this method is the substantial amount of bycatch associated with these nets. Thus, this study focuses on the development of a non-permanent modification for a traditional fyke net to allow for a harvesting of green crabs with substantially less bycatch. The design requirements were that the modification must be reversible to maintain the integrity of the original fyke net; harvest green crabs passively, without the use of bait; reduce bycatch by 80% compared with traditional nets; and be attached and removed from a traditional fyke net in an expedite way. The final design featured a one piece attachment including a ramp and slit. The ramp allows crabs to climb up to and enter the slit through which they fall and become trapped in the fyke net. The slit minimizes the area through fish may enter the net in order to reduce the probability of fish getting trapped. A field study was performed with side-by-side traditional and modified fyke nets placed 50 m away from each other. Nets were checked every 24h for 16d and the modification was switched between nets once every 4d to account for potential differences resulting from location.
Keywords: green crab, fyke net, bycatch reduction
Conference name: CSBE/SCGAB 2017 Annual Conference, Canad Inns Polo Park, Winnipeg, Manitoba, 6-10 August 2017.
Session name: Poster Session
Publisher: Canadian Society for Bioengineering
Language 1: en
Rights: Canadian Society for Bioengineering