Archdale

Bacheler

Barber

Bates

Bergshoeff

Berrill

Best

Beukema

Blakeslee

Carlton

Cohen

Crisp

Crothers

Curtis

Department of Fisheries and Oceans Canada (DFO)

Duncombe

Favaro

Gillespie

Jeffery

Jensen

Joseph

Jury

Kahle

Kersey Sturdivant

Klassen

Lodge

Lowe

Matheson

McKenzie

McNive

Meintzer

Miller

Murray

Nguyen

Orth

Pinhero

Pintor

R Core Team

Rehage

Robbins

Roman

Ropes

Rossong

Shelton

Souza

Underwood

Vazquez Archdale

Watson

Weis

Welch

Williams

Yamada

PeerJ

English

The European green crab (Carcinus maenas) is a destructive marine invader that was first discovered in Newfoundland waters in 2007 and has since become established in nearshore ecosystems on the south and west coast of the island. Targeted fishing programs aimed at removing green crabs from invaded Newfoundland ecosystems use Fukui traps, but the capture efficiency of these traps has not been previously assessed. We assessed Fukui traps usingin situobservation with underwater video cameras as they actively fished for green crabs. From these videos, we recorded the number of green crabs that approached the trap, the outcome of each entry attempt (success or failure), and the number of exits from the trap. Across eight videos, we observed 1,226 green crab entry attempts, with only a 16% rate of success from these attempts. Based on these observations we believe there is scope to improve the performance of the Fukui trap through modifications in order to achieve a higher catch per unit effort (CPUE), maximizing trap usage for mitigation. Ultimately, a more efficient Fukui trap will help to control green crab populations in order to preserve the function and integrity of ecosystems invaded by the green crab.</jats:p

Jonathan A. Bergshoeff

Cynthia H. McKenzie

Kiley Best

Nicola Zargarpour

Brett Favaro

Crossref

Using underwater video to evaluate the performance of the Fukui trap as a mitigation tool for the invasive European green crab (<i>Carcinus maenas</i>) in Newfoundland, Canada

Supplemental Information 4: Code used to produce figures and analyze video data

Supplemental Information 4: Code used to produce figures and analyze video data

Abstract

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