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A Mixed-Method Approach for Quantifying Illegal Fishing and Its Impact on an Endangered Fish Species

Descriptive

TypeOfResource
Text
TitleInfo
Title
A Mixed-Method Approach for Quantifying Illegal Fishing and Its Impact on an Endangered Fish Species
Name (type = personal); (authority = orcid); (authorityURI = http://id.loc.gov/vocabulary/identifiers/orcid.html); (valueURI = http://orcid.org/0000-0002-2557-8920)
NamePart (type = family)
Free
NamePart (type = given)
Christopher M.
Affiliation
SEBS - Inst of Marine & Coastal Sciences, Rutgers University
Role
RoleTerm (type = text); (authority = marcrt)
author
Name (type = personal)
NamePart (type = family)
Jensen
NamePart (type = given)
Olaf P.
Affiliation
SEBS - Inst of Marine & Coastal Sciences, Rutgers University
Role
RoleTerm (type = text); (authority = marcrt)
author
Name (type = personal)
NamePart (type = family)
Mendsaikhan
NamePart (type = given)
Bud
Affiliation
Mongolian Academy of Sciences
Role
RoleTerm (type = text); (authority = marcrt)
author
Name (type = corporate); (authority = RutgersOrg-Department)
NamePart
Marine and Coastal Sciences
Name (type = corporate); (authority = RutgersOrg-School)
NamePart
School of Environmental and Biological Sciences (SEBS)
Genre (authority = RULIB-FS)
Article, Refereed
Genre (authority = NISO JAV)
Version of Record (VoR)
Note (type = peerReview)
Peer reviewed
OriginInfo
DateCreated (encoding = w3cdtf); (qualifier = exact); (keyDate = yes)
2015
Abstract (type = Abstract)
Illegal harvest is recognized as a widespread problem in natural resource management. The use of multiple methods for quantifying illegal harvest has been widely recommended yet infrequently applied. We used a mixed-method approach to evaluate the extent, charac- ter, and motivations of illegal gillnet fishing in Lake Hovsgol National Park, Mongolia and its impact on the lake’s fish populations, especially that of the endangered endemic Hovsgol grayling (Thymallus nigrescens). Surveys for derelict fishing gear indicate that gillnet fishing is widespread and increasing and that fishers generally use 3–4 cm mesh gillnet. Interviews with resident herders and park rangers suggest that many residents fish for subsistence during the spring grayling spawning migration and that some residents fish commercially year-round. Interviewed herders and rangers generally agree that fish population sizes are decreasing but are divided on the causes and solutions. Biological monitoring indicates that the gillnet mesh sizes used by fishers efficiently target Hovsgol grayling. Of the five species sampled in the monitoring program, only burbot (Lota lota) showed a significant decrease in population abundance from 2009–2013. However, grayling, burbot, and roach (Rutilus ruti- lus) all showed significant declines in average body size, suggesting a negative fishing impact. Data-poor stock assessment methods suggest that the fishing effort equivalent to each resident family fishing 50-m of gillnet 11–15 nights per year would be sufficient to over- exploit the grayling population. Results from the derelict fishing gear survey and interviews suggest that this level of effort is not implausible. Overall, we demonstrate the ability for a mixed-method approach to effectively describe an illegal fishery and suggest that these methods be used to assess illegal fishing and its impacts in other protected areas.
Language
LanguageTerm (authority = ISO 639-3:2007); (type = text)
English
PhysicalDescription
InternetMediaType
application/pdf
Extent
17 p.
Extension
DescriptiveEvent
Type
Citation
DateTime (encoding = w3cdtf)
2015
AssociatedObject
Type
Journal
Relationship
Has part
Name
PLoS ONE
Identifier (type = volume and issue)
10(12)
Reference (type = url)
https://dx.doi.org/10.1371/journal.pone.0143960
Detail
e0143960-
Extension
DescriptiveEvent
Type
Grant award
AssociatedEntity
Role
Funder
Name
National Science Foundation
AssociatedEntity
Role
Originator
Name
Olaf Jensen
Extension
DescriptiveEvent
Type
Grant award
AssociatedEntity
Role
Funder
Name
USAID
AssociatedEntity
Role
Originator
Name
Bud Mendsaikhan
Extension
DescriptiveEvent
Type
Grant award
AssociatedEntity
Role
Funder
Name
American Center for Mongolian Studies
AssociatedEntity
Role
Originator
Name
Christopher Free
Extension
DescriptiveEvent
Type
Grant award
AssociatedEntity
Role
Funder
Name
Grayling Research Trust
AssociatedEntity
Role
Originator
Name
Christopher Free
Detail
Research grant
Extension
DescriptiveEvent
Type
Grant award
AssociatedEntity
Role
Funder
Name
National Oceanic and Atmospheric Administration
AssociatedEntity
Role
Originator
Name
Christopher Free
Detail
Sea Grant
Subject (authority = LCSH)
Topic
Fishing
Subject (authority = LCSH)
Topic
Rare fishes
Subject (authority = LCSH)
Topic
Endangered species
Subject (authority = local)
Topic
Illegal harvest
Subject (authority = LCSH)
Topic
Research--Methodology
RelatedItem (type = host)
TitleInfo
Title
Jensen, Olaf P.
Identifier (type = local)
rucore30182000001
RelatedItem (type = host)
TitleInfo
Title
Free, Christopher
Identifier (type = local)
rucore30178000001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3M32XQ2
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Rights

RightsDeclaration (AUTHORITY = FS); (ID = rulibRdec0004)
Copyright for scholarly resources published in RUcore is retained by the copyright holder. By virtue of its appearance in this open access medium, you are free to use this resource, with proper attribution, in educational and other non-commercial settings. Other uses, such as reproduction or republication, may require the permission of the copyright holder.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
RightsEvent
Type
Permission or license
AssociatedObject
Type
License
Name
Multiple author license v. 1
Detail
I hereby grant to Rutgers, The State University of New Jersey (Rutgers) the non-exclusive right to retain, reproduce, and distribute the deposited work (Work) in whole or in part, in and from its electronic format, without fee. This agreement does not represent a transfer of copyright to Rutgers.Rutgers may make and keep more than one copy of the Work for purposes of security, backup, preservation, and access and may migrate the Work to any medium or format for the purpose of preservation and access in the future. Rutgers will not make any alteration, other than as allowed by this agreement, to the Work.I represent and warrant to Rutgers that the Work is my original work. I also represent that the Work does not, to the best of my knowledge, infringe or violate any rights of others.I further represent and warrant that I have obtained all necessary rights to permit Rutgers to reproduce and distribute the Work and that any third-party owned content is clearly identified and acknowledged within the Work.By granting this license, I acknowledge that I have read and agreed to the terms of this agreement and all related RUcore and Rutgers policies.
RightsHolder (type = personal)
Name
FamilyName
Free
GivenName
Christopher
MiddleName
M.
Role
Copyright holder
RightsHolder (type = personal)
Name
FamilyName
Jensen
GivenName
Olaf
MiddleName
P.
Role
Copyright holder
RightsHolder (type = personal)
Name
FamilyName
Mendsaikhan
GivenName
Bud
Role
Copyright holder
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RULTechMD (ID = TECHNICAL1)
ContentModel
Document
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