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  • Tags / Keywords Baseline and monitoring
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  • Tags / Keywords seychelles black parrot
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InvaCost, a Public Database of the Economic Costs of Biological Invasions Worldwide
Island and Ocean Ecosystems, BRB
Available Online

Assailly, C.

,

Courchamp, F.

,

Diagne, C.

,

Gozlan, R. E.

,

Jarić, I.

,

Jourdain, F.

,

Leroy, B.

,

Nuninger, L.

,

Roiz, D.

,

Vaissière, A.-C.

2020
Biological invasions are responsible for tremendous impacts globally, including huge economic losses and management expenditures. Efficiently mitigating this major driver of global change requires the improvement of public awareness and policy regarding its substantial impacts on our socio-ecosystems. One option to contribute to this overall objective is to inform people on the economic costs linked to these impacts; however, until now, a reliable synthesis of invasion costs has never been produced at a global scale. Here, we introduce InvaCost as the most up-to-date, comprehensive, harmonised and robust compilation and description of economic cost estimates associated with biological invasions worldwide. We have developed a systematic, standardised methodology to collect information from peer-reviewed articles and grey literature, while ensuring data validity and method repeatability for further transparent inputs. Our manuscript presents the methodology and tools used to build and populate this living and publicly available database. InvaCost provides an essential basis (2419 cost estimates currently compiled) for worldwide research, management efforts and, ultimately, for datadriven and evidence-based policymaking.
Five eradications, three species, three islands: overview, insights and recommendations from invasive bird eradications in the Seychelles
Island and Ocean Ecosystems, BRB
Available Online

Agricole, J.

,

Angell, G.

,

Banville, P.

,

Bunbury, N.

,

Constance A.

,

Fleischer-Dogley, F.

,

Friedlander J.

,

Haverson, P.

,

Leite, L.

,

Mahoune, T.

,

Melton-Durup, E.

,

Moumou, J.

,

Page, N.

,

Raines, K.

,

van de Crommenacker, J.

2019
Management and eradication techniques for invasive alien birds remain in their infancy compared to invasive mammal control methods, and there are still relatively few examples of successful avian eradications. Since 2011, five separate eradication programmes for invasive birds have been conducted on three islands by the Seychelles Islands Foundation (SIF). Target species were prioritised according to their threat level to the native biodiversity of the UNESCO World Heritage Sites of the Seychelles, Aldabra Atoll and Vallée de Mai, which SIF is responsible for managing and protecting. Red-whiskered bulbuls (Pycnonotus jocosus) and Madagascar fodies (Foudia madagascariensis) occurred on Assumption, the closest island to Aldabra, which, at the time, had no known introduced bird species. The growing population of ring-necked parakeets (Psittacula krameri) on Mahé posed a threat to endemic Seychelles black parrots (Coracopsis barklyi) on Praslin where the Vallée de Mai forms their core breeding habitat. In 2012, red-whiskered bulbuls and Madagascar fodies were detected on Aldabra, so an additional eradication was started. All eradications used a combination of mist-netting and shooting. The intensive part of each eradication lasted three years or less. On Assumption, 5,279 red-whiskered bulbuls and 3,291 Madagascar fodies were culled; on Mahé, 545 parakeets were culled; and on Aldabra 262 Madagascar fodies and one red-whiskered bulbul were culled. Each programme underwent 1–2 years of follow-up monitoring before eradication was confi rmed, and four of the fi ve eradications have been successful so far. None of these species had previously been eradicated in large numbers from other islands so the successes substantially advance this fi eld of invasive species management. The challenges and insights of these eradications also provide unique learning opportunities for other invasive avian eradications.