Proposed cut-off lengths to split recruits and adults for anchovy commercial landings

 

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dc.contributor.author Cunningham, Carryn L
dc.contributor.author Butterworth, Doug S
dc.date.accessioned 2016-04-12T13:46:12Z
dc.date.available 2016-04-12T13:46:12Z
dc.date.issued 2007
dc.identifier.citation Cunningham, C. L., & Butterworth, D. S. (2007). Proposed cut-off lengths to split recruits and adults for anchovy commercial landings. Unpublished MCM Document MCM/2007/FEB/SWG-PEL/08. 15pp. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/18822
dc.description.abstract In the absence of the availability of Age Length Keys for anchovy catch data, assumptions about the age composition of the anchovy catches are needed. Previous assessments and management procedures have been based upon the assumption that all anchovy caught from April to October were recruits (0-year-olds), while all anchovy caught from November to March were 1-year-olds, with 2-year-old and older fish not appearing in the catches at all. These assumptions were based upon the life-history characteristics of anchovy and general fishing patterns (De Oliveira 2003). This document considers whether a (monthly varying) cut-off length could instead be used to split the anchovy catch into juveniles and adults (1 year-olds only) for each month of the year.
dc.language eng en_ZA
dc.title Proposed cut-off lengths to split recruits and adults for anchovy commercial landings en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-04-12T13:45:20Z
uct.type.publication Research en_ZA
uct.type.resource Research paper en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Marine Resource Assessment and Management Group en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Cunningham, C. L., & Butterworth, D. S. (2007). <i>Proposed cut-off lengths to split recruits and adults for anchovy commercial landings</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18822 en_ZA
dc.identifier.chicagocitation Cunningham, Carryn L, and Doug S Butterworth <i>Proposed cut-off lengths to split recruits and adults for anchovy commercial landings.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2007. http://hdl.handle.net/11427/18822 en_ZA
dc.identifier.vancouvercitation Cunningham CL, Butterworth DS. Proposed cut-off lengths to split recruits and adults for anchovy commercial landings. 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18822 en_ZA
dc.identifier.ris TY - Working Paper AU - Cunningham, Carryn L AU - Butterworth, Doug S AB - In the absence of the availability of Age Length Keys for anchovy catch data, assumptions about the age composition of the anchovy catches are needed. Previous assessments and management procedures have been based upon the assumption that all anchovy caught from April to October were recruits (0-year-olds), while all anchovy caught from November to March were 1-year-olds, with 2-year-old and older fish not appearing in the catches at all. These assumptions were based upon the life-history characteristics of anchovy and general fishing patterns (De Oliveira 2003). This document considers whether a (monthly varying) cut-off length could instead be used to split the anchovy catch into juveniles and adults (1 year-olds only) for each month of the year. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - Proposed cut-off lengths to split recruits and adults for anchovy commercial landings TI - Proposed cut-off lengths to split recruits and adults for anchovy commercial landings UR - http://hdl.handle.net/11427/18822 ER - en_ZA


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