Near disappearance of the Angelshark Squatina squatina over half a century of observations

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

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Near disappearance of the Angelshark Squatina squatina over half a century of observations. / Hiddink, Jan G; Shepperson, Jennifer; Bater, Robin et al.
Yn: Conservation Science and Practice, Cyfrol 1, Rhif 9, e97, 09.2019.

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

HarvardHarvard

Hiddink, JG, Shepperson, J, Bater, R, Goonesekera, D & Dulvy, NK 2019, 'Near disappearance of the Angelshark Squatina squatina over half a century of observations', Conservation Science and Practice, cyfrol. 1, rhif 9, e97. https://doi.org/10.1111/csp2.97

APA

Hiddink, J. G., Shepperson, J., Bater, R., Goonesekera, D., & Dulvy, N. K. (2019). Near disappearance of the Angelshark Squatina squatina over half a century of observations. Conservation Science and Practice, 1(9), Erthygl e97. https://doi.org/10.1111/csp2.97

CBE

Hiddink JG, Shepperson J, Bater R, Goonesekera D, Dulvy NK. 2019. Near disappearance of the Angelshark Squatina squatina over half a century of observations. Conservation Science and Practice. 1(9):Article e97. https://doi.org/10.1111/csp2.97

MLA

VancouverVancouver

Hiddink JG, Shepperson J, Bater R, Goonesekera D, Dulvy NK. Near disappearance of the Angelshark Squatina squatina over half a century of observations. Conservation Science and Practice. 2019 Medi;1(9):e97. Epub 2019 Gor 31. doi: 10.1111/csp2.97

Author

Hiddink, Jan G ; Shepperson, Jennifer ; Bater, Robin et al. / Near disappearance of the Angelshark Squatina squatina over half a century of observations. Yn: Conservation Science and Practice. 2019 ; Cyfrol 1, Rhif 9.

RIS

TY - JOUR

T1 - Near disappearance of the Angelshark Squatina squatina over half a century of observations

AU - Hiddink, Jan G

AU - Shepperson, Jennifer

AU - Bater, Robin

AU - Goonesekera, Dilhani

AU - Dulvy, Nicholas K.

PY - 2019/9

Y1 - 2019/9

N2 - Marine extinctions are particularly difficult to detect and almost all have been discovered after the fact. Retrospective analyses are essential to avoid concluding no-extinction when one has occurred. We reconstruct the Angelshark population trajectory in a former hotspot (Wales), using interviews and opportunistic records. After correcting for observation effort and recall bias, we estimate a 70% (1.5% yr-1) decline in abundance over 46 years. While formerly widespread, Angelshark distribution contracted to a central core of Cardigan Bay. Angelshark declined almost unnoticed in one of the best-monitored and most intensively managed seas in the world. Bycatch may be minimised by limiting netting on shingle reefs in Cardigan Bay. We provide the first quantitative time series to reveal the timing and trajectory of decline of Angelshark in the coastal waters of Wales and uncover historical centres of abundance and remnant populations that provide the first opportunity for the focus of conservation.

AB - Marine extinctions are particularly difficult to detect and almost all have been discovered after the fact. Retrospective analyses are essential to avoid concluding no-extinction when one has occurred. We reconstruct the Angelshark population trajectory in a former hotspot (Wales), using interviews and opportunistic records. After correcting for observation effort and recall bias, we estimate a 70% (1.5% yr-1) decline in abundance over 46 years. While formerly widespread, Angelshark distribution contracted to a central core of Cardigan Bay. Angelshark declined almost unnoticed in one of the best-monitored and most intensively managed seas in the world. Bycatch may be minimised by limiting netting on shingle reefs in Cardigan Bay. We provide the first quantitative time series to reveal the timing and trajectory of decline of Angelshark in the coastal waters of Wales and uncover historical centres of abundance and remnant populations that provide the first opportunity for the focus of conservation.

U2 - 10.1111/csp2.97

DO - 10.1111/csp2.97

M3 - Article

VL - 1

JO - Conservation Science and Practice

JF - Conservation Science and Practice

SN - 2578-4854

IS - 9

M1 - e97

ER -