box-jenkins analysis for shark landings in costa rica

Box-Jenkins-Analyse der Haianlandungen in Costa Rica

Clicks: 316
ID: 159627
2004
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Abstract
Sharks are highly vulnerable to intense and prolonged fishery extraction. This article analyzes the data on shark landings from the artisan fishing fleet on Costa Rica’s Pacific coast between 1988 and 1997. The data come from an invoicing system administered by the Costa Rican Fisheries Institute (Instituto Costarricense de la Pesca y Acuacultura, INCOPESCA). Pacific coast shark fishing during the period under study represented approximately 20% of the total national fisheries volume. According to data from the invoicing system, the Northern Pacific region was the most productive, reporting 58% of the shark catch nationwide. Within this region, shark fishing in Papagayo Gulf represented 91% and 53% of the landings by fishery region and nationwide, respectively. The mid-sized and advanced (length of boat > 10 meters) artisan fishing fleets reported 96% of the shark catches in the zone. The study of shark fisheries in the Papagayo Gulf zone is crucial for an understanding of fishery dynamics for this resource at the national level. A monthly chronological series was constructed with the landings in the Papagayo Gulf zone, and a Univariate Box-Jenkins (UBJ) Model was estimated for first-order moving averages MA(1) with a seasonal component of the Yt = lambda a t + gamma S12 + a t type
En este trabajo, se analizaron los datos de desembarque de tiburón de la flota pesquera artesanal en el Pacífico costarricense entre 1988 y 1997. Los datos provienen de un sistema de facturas administrado por el Instituto Costarricense de la Pesca (INCOPESCA). En el Pacífico, la pesca de tiburón en el período de estudio representó aproximadamente el 20% del volumen total de pesca a nivel nacional. De acuerdo con los datos del sistema de facturas, la región del Pacífico Norte fue la más productiva, reportando un 58% de los desembarques de tiburón a nivel nacional. En esta región, la pesca de tiburón en la zona del Golfo de Papagayo reportó 91% y 53% de los desembarques por región de pesca y a nivel nacional respectivamente. Las flotas pesqueras artesanales media y avanzada (longitud de embarcación > 10 metros) reportaron el 96% de los desembarques de tiburón de la zona. El estudio de la pesca de tiburón en la zona del Golfo de Papagayo es fundamental para entender la dinámica de la pesca del recurso a nivel nacional. Se construyó una serie cronológica mensual con los desembarques de la zona del Golfo de Papagayo y se estimó un modelo Box y Jenkins (UBJ) de medias móviles de primer orden MA(1) con componente estacional del tipo Yt = lambda a t + gamma S12 + a t
Reference Key
bonilla2004revistabox-jenkins Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Roger Bonilla;Juan B Chavarría
Journal science journal of university of zakho
Year 2004
DOI
DOI not found
URL
http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442004000600013
Keywords
fisheries time series sharks box-jenkins models

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