Spatial distribution and species composition of small pelagic fishes in the Gulf of California

Lanz, Edgar; Nevárez Martínez, Manuel O.; López Martínez, Juana; Dworak, Juan A.

dc.creator	Lanz, Edgar
dc.creator	Nevárez Martínez, Manuel O.
dc.creator	López Martínez, Juana
dc.creator	Dworak, Juan A.
dc.date	2006-08-17
dc.date.accessioned	2016-05-03T15:26:02Z
dc.date.available	2016-05-03T15:26:02Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/5609
dc.identifier	10.15517/rbt.v56i2.5609
dc.identifier.uri	https://hdl.handle.net/10669/25784
dc.description	Traditional regionalization methods in fisheries based on provinces or major fishing areas, includes large and arbitrary grids in which basic statistics or inferences on distribution or abundance are made. We describe a method for regionalization and analysis of fishing activities for small pelagic fisheries in the Gulf of California, based on spatial patterns of landing and catch data in a Geographic Information System (GIS) environment. A fisheries database from logbooks with spatial attributes from October 2002 to June 2007 was analyzed. Landings and catching data were transformed to a Weighted Region Index (WRI) by using fuzzy logic operators. The WRI revealed fishing action centers characterized by areas with the highest WRI values, and a hierarchy for the relative importance of the regions was established. Guaymas, Desemboque de Caborca, Isla Patos, and Bahía San Rafael were the most prominent ones. An analysis of the relative frequency of species composition showed that the Pacific sardine had over 80% abundance in the midriff islands, and remained as the most important in the upper gulf regions, while in the central part of the gulf, relative abundances of Pacific sardine and Northern anchovy were more balanced. Relative abundance of mackerel was significantly larger around Isla Patos than in any other place. Guaymas had the largest relative composition of Northern anchovy and the lowest values for Pacific sardine. Desemboque de Caborca showed the largest homogeneity in species relative composition. It is important to highlight that this results come from in situ data, while the results previously reported come from landing statistics by port. Therefore, the present method acknowledges the spatial differences of species by regions, additional to the traditional time series analysis.	en-US
dc.format	application/pdf
dc.language	eng
dc.publisher	Universidad de Costa Rica	en-US
dc.rights	Copyright (c) 2014 International Journal of Tropical Biology and Conservation	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 56 (2) June 2008	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 56 (2) June 2008	es-ES
dc.source	Revista Biología Tropical; Vol. 56 (2) June 2008	pt-PT
dc.source	2215-2075
dc.source	0034-7744
dc.source	10.15517/rbt.v56i2
dc.title	Spatial distribution and species composition of small pelagic fishes in the Gulf of California	en-US
dc.title	Spatial distribution and species composition of small pelagic fishes in the Gulf of California	es-ES
dc.type	artículo original
dc.coverage	CRC	en-US

Ficheros en el ítem

Ficheros	Tamaño	Formato	Ver
No hay ficheros asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Revista de Biología Tropical [2107]

Mostrar el registro sencillo del ítem