Evaluation of alternative conservation strategies for the blue-billed curassow Crax alberti in the Middle Magdalena Valley, Colombia
The blue-billed curassow Crax alberti is an endemic Colombian species categorized as Critically Endangered on the IUCN Red List because of the effects of hunting and habitat loss. Conservation and management actions are required to ensure its persistence in the forest remnants across its range. We c...
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Published in | Oryx Vol. 57; no. 2; pp. 239 - 247 |
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Language | English |
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Cambridge University Press
01.03.2023
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Abstract | The blue-billed curassow Crax alberti is an endemic Colombian species categorized as Critically Endangered on the IUCN Red List because of the effects of hunting and habitat loss. Conservation and management actions are required to ensure its persistence in the forest remnants across its range. We conducted a population viability analysis for a population in the municipality of Yondó, Antioquia, based on data collected in the field and available information on the reproductive ecology of the species. We evaluate seven realistic conservation scenarios by comparing the effects that changes in mortality from hunting, carrying capacity and initial population size have on the survival probability of the population. Our results indicate that: (1) the studied population is not viable over a 100-year period under current conditions; (2) mortality as a result of hunting and the size of the initial population have the greatest impacts on the mean time to extinction; (3) a strategy based on eliminating hunting in the two sites with the largest forest remnants in the landscape could ensure the viability of the population over a 100-year period; and (4) other strategies (i.e. population supplementation with captive-bred individuals, reduction of deforestation in the landscape) do not guarantee the viability of the population if mortality from hunting remains constant, even at low levels. These results confirm the susceptibility of the blue-billed curassow to the threats it faces in this landscape, particularly hunting, and provide information on the conservation actions that could allow this remaining population to prevail in the long term. |
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AbstractList | The blue-billed curassow Crax alberti is an endemic Colombian species categorized as Critically Endangered on the IUCN Red List because of the effects of hunting and habitat loss. Conservation and management actions are required to ensure its persistence in the forest remnants across its range. We conducted a population viability analysis for a population in the municipality of Yondó, Antioquia, based on data collected in the field and available information on the reproductive ecology of the species. We evaluate seven realistic conservation scenarios by comparing the effects that changes in mortality from hunting, carrying capacity and initial population size have on the survival probability of the population. Our results indicate that: (1) the studied population is not viable over a 100-year period under current conditions; (2) mortality as a result of hunting and the size of the initial population have the greatest impacts on the mean time to extinction; (3) a strategy based on eliminating hunting in the two sites with the largest forest remnants in the landscape could ensure the viability of the population over a 100-year period; and (4) other strategies (i.e. population supplementation with captive-bred individuals, reduction of deforestation in the landscape) do not guarantee the viability of the population if mortality from hunting remains constant, even at low levels. These results confirm the susceptibility of the blue-billed curassow to the threats it faces in this landscape, particularly hunting, and provide information on the conservation actions that could allow this remaining population to prevail in the long term. Abstract The blue-billed curassow Crax alberti is an endemic Colombian species categorized as Critically Endangered on the IUCN Red List because of the effects of hunting and habitat loss. Conservation and management actions are required to ensure its persistence in the forest remnants across its range. We conducted a population viability analysis for a population in the municipality of Yondó, Antioquia, based on data collected in the field and available information on the reproductive ecology of the species. We evaluate seven realistic conservation scenarios by comparing the effects that changes in mortality from hunting, carrying capacity and initial population size have on the survival probability of the population. Our results indicate that: (1) the studied population is not viable over a 100-year period under current conditions; (2) mortality as a result of hunting and the size of the initial population have the greatest impacts on the mean time to extinction; (3) a strategy based on eliminating hunting in the two sites with the largest forest remnants in the landscape could ensure the viability of the population over a 100-year period; and (4) other strategies (i.e. population supplementation with captive-bred individuals, reduction of deforestation in the landscape) do not guarantee the viability of the population if mortality from hunting remains constant, even at low levels. These results confirm the susceptibility of the blue-billed curassow to the threats it faces in this landscape, particularly hunting, and provide information on the conservation actions that could allow this remaining population to prevail in the long term. |
Author | Kattan, Gustavo H. Valencia, Igor F. Caro, Lina Forero-Medina, German Valenzuela, Leonor Arbelaez, Fernando |
Author_xml | – sequence: 1 givenname: Igor F. orcidid: 0000-0002-4442-4222 surname: Valencia fullname: Valencia, Igor F. email: ivalencia@wcs.org organization: Wildlife Conservation Society, Avenida 5N # 22N-11, Cali, Colombia – sequence: 2 givenname: Gustavo H. orcidid: 0000-0003-4198-773X surname: Kattan fullname: Kattan, Gustavo H. organization: Departamento de Ciencias Naturales y Matemáticas, Pontificia Universidad Javeriana Seccional Cali, Cali, Colombia – sequence: 3 givenname: Leonor orcidid: 0000-0003-0814-3690 surname: Valenzuela fullname: Valenzuela, Leonor organization: Wildlife Conservation Society, Avenida 5N # 22N-11, Cali, Colombia – sequence: 4 givenname: Lina surname: Caro fullname: Caro, Lina organization: Wildlife Conservation Society, Avenida 5N # 22N-11, Cali, Colombia – sequence: 5 givenname: Fernando surname: Arbelaez fullname: Arbelaez, Fernando organization: Fundación Biodiversa Colombia, Bogotá, Colombia – sequence: 6 givenname: German orcidid: 0000-0001-9952-7221 surname: Forero-Medina fullname: Forero-Medina, German organization: Wildlife Conservation Society, Avenida 5N # 22N-11, Cali, Colombia |
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Cites_doi | 10.3389/fevo.2016.00098 10.1016/j.biocon.2006.05.016 10.1071/WR9930045 10.1038/sj.hdy.6885530 10.1017/S0030605311001451 10.1017/S1367943003003147 10.1046/j.1523-1739.2001.01089.x 10.1371/journal.pone.0013210 10.1111/j.1557-9263.2009.00237.x 10.1126/science.1244693 10.1111/1365-2664.13044 10.18637/jss.v043.i10 10.1016/S0006-3207(98)00044-5 |
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Keywords | Crax alberti Colombia occupancy Blue-billed curassow population viability analysis camera-trap sampling conservation strategies |
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Snippet | The blue-billed curassow Crax alberti is an endemic Colombian species categorized as Critically Endangered on the IUCN Red List because of the effects of... Abstract The blue-billed curassow Crax alberti is an endemic Colombian species categorized as Critically Endangered on the IUCN Red List because of the effects... |
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SubjectTerms | Blue-billed curassow camera-trap sampling Cameras Carrying capacity Colombia Conservation conservation strategies Crax alberti Decision making Deforestation Endangered species Endemic species Floods Forests Habitat loss Hunting Land settlement Landscape Mortality occupancy Performance evaluation Population Population number Population studies Population viability population viability analysis Species extinction Threatened species Variables Vegetation |
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Title | Evaluation of alternative conservation strategies for the blue-billed curassow Crax alberti in the Middle Magdalena Valley, Colombia |
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