What’s the catch with lumpsuckers? A North Atlantic study of seabird bycatch in lumpsucker gillnet fisheries

Christensen‐Dalsgaard, Signe; Anker‐Nilssen, Tycho; Crawford, Rory; Bond, Alexander L.; Sigurðsson, Guðjón Már; Glemarec, Gildas; Hansen, Erpur Snær; Kadin, Martina; Kindt-Larsen, Lotte; Mallory, Mark L.; Merkel, Flemming; Petersen, Aevar; Provencher, Jennifer F.; Bærum, Kim Magnus

doi:10.1016/j.biocon.2019.108278

Cited by 28 publications

(31 citation statements)

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“…2013, Christensen‐Dalsgaard et al . 2019). Diving birds suffer reduced visual capabilities while foraging underwater, especially in turbid coastal waters, which probably increases their susceptibility to entanglement in gillnets (Martin & Crawford 2015).…”

Section: Discussionmentioning

confidence: 99%

“…2015), bycatch in fishery nets (Christensen‐Dalsgaard et al . 2019) and temporary increases in predation pressure (Ekroos et al . 2012b; although as noted above, predation pressure is considered to be low).…”

Section: Discussionmentioning

confidence: 99%

“…2013, Christensen‐Dalsgaard et al . 2019), hunting pressure (Desholm et al, 2002, Gilliland et al . 2009), predation pressure on adult females (Ekroos et al .…”

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confidence: 99%

“…Conservationists have long been interested in the Common Eider (Townsend 1914); however, recent declines in global numbers have made the Common Eider a species of greater conservation concern, resulting in the species being uplisted to 'Near-threatened' globally, but 'Vulnerable' in Europe and 'Endangered' within the 27 European Union countries in 2015 (Birdlife International 2015. Previous research has highlighted a wide range of potential threats to Common Eider populations, including fisheries bycatch (Ellis et al 2013, Christensen-Dalsgaard et al 2019, hunting pressure (Desholm et al, 2002, Gilliland et al 2009, predation pressure on adult females (Ekroos et al 2012b), decreased juvenile survival due to food shortages (Hario & Rintala 2006), food shortage due to decreased fertilizer input (Laursen & Møller 2014), thiamine deficiency (Balk et al 2009), pollution incidents including oil spills (Ekroos et al 2012a), climate change (Lehikoinen et al, 2006, Guéry et al 2017, Bårdsen et al 2018, Dey et al 2018 and outbreaks of disease such as cholera and Wellfleet Bay virus (Descamps et al 2012, Allison et al 2015. Crucially, for a large-bodied, long-lived bird such as the Common Eider, population dynamics typically show the greatest sensitivity to variation in adult survival rates (Wilson et al 2012, Flint 2015,Öst et al 2016.…”

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Long‐term trends in the survival rates of adult female Common EiderSomateria mollissimaat three colonies in Iceland

Wood

Thorstensen²,

Lúðvíksson³

et al. 2020

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Identifying temporal and spatial patterns in demography is critical to understanding long‐term fluctuations in population size. Common Eider Somateria mollissima numbers have shown a long‐term decline, resulting in the species being uplisted in 2015 to ‘Endangered’ within European Union countries. Obtaining improved estimates of survival rates of Common Eiders (and other seaducks) has been identified as a priority to improve our understanding of the demographic causes of the observed global decreases in population size and to inform conservation efforts. In this study, we used long‐term (1982–2017) mark–recovery data on 3018 individuals from three breeding colonies in Iceland to quantify the spatial and temporal variation in the annual true survival rates of adult female Common Eider. Model comparison using an information‐theoretic approach indicated that true survival and recovery rates varied between years and colonies but showed no consistent temporal pattern across the three colonies. Geometric mean (± se) annual true survival across our three breeding colonies was 0.916 ± 0.017 (95% confidence interval (CI) = 0.819–0.961), with a mean life expectancy of 11.8 years (95% CI 5.4–25.2). Our survival estimates were relatively high compared with those reported previously for many other Common Eider populations, which may reflect their protected status, low predation pressure and high food availability on Iceland and its surrounding waters. Our findings provide spatially and temporally explicit demographic information needed to help conservationists understand the local and global declines in Common Eider populations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…2013, Christensen‐Dalsgaard et al . 2019), hunting pressure (Desholm et al, 2002, Gilliland et al . 2009), predation pressure on adult females (Ekroos et al .…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Long‐term trends in the survival rates of adult female Common EiderSomateria mollissimaat three colonies in Iceland

Wood

Thorstensen²,

Lúðvíksson³

et al. 2020

Ibis

Self Cite

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“…This biased reporting would lead not only to underestimates of the vessel fuel consumption but also the size of the gear that can be towed by the vessels. New fisheries knowledge would also be required to strengthen the evaluation, especially for estimating the bycatch risk (Kindt-Larsen et al 2017;Christensen-Dalsgaard et al 2019;Glemarec et al, 2020). Precisely because, by nature, bycaught species are not targeted, we had difficulty in retrieving thorough and consistent data for the full population dynamics and catches.…”

Section: Management Scenarios and Fisheries Economicsmentioning

confidence: 99%

Reducing fisheries impacts on the seafloor: A bio-economic evaluation of policy strategies for improving sustainability in the Baltic Sea

et al. 2020

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Origin of the Northeast Atlantic Islands Bird Fauna

Petersen¹,

Olsen

2021

Biogeography in the Sub‐Arctic

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What’s the catch with lumpsuckers? A North Atlantic study of seabird bycatch in lumpsucker gillnet fisheries

Cited by 28 publications

References 40 publications

Long‐term trends in the survival rates of adult female Common EiderSomateria mollissimaat three colonies in Iceland

Long‐term trends in the survival rates of adult female Common EiderSomateria mollissimaat three colonies in Iceland

Reducing fisheries impacts on the seafloor: A bio-economic evaluation of policy strategies for improving sustainability in the Baltic Sea

Origin of the Northeast Atlantic Islands Bird Fauna

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