Floating objects of the eastern pacific: types, spatial distribution and temporal changes

Floating objects of the eastern pacific: types, spatial distribution and temporal changes

The spatial pattern was analyzed of different types of floating objects associated with the tuna fishery in the eastern tropical Pacific (ETP). Of the 34 types of floating objects, four classes were defined: floating objects of terrestrial origin (FOTE), floating objects of marine origin (FOMA), art...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Solana-Soares, R
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2001
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/473
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:cienciasmarinas.com.mx:article-473
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Solana-Soares, R
spellingShingle Solana-Soares, R
Floating objects of the eastern pacific: types, spatial distribution and temporal changes
author_facet Solana-Soares, R
author_sort Solana-Soares, R
title Floating objects of the eastern pacific: types, spatial distribution and temporal changes
title_short Floating objects of the eastern pacific: types, spatial distribution and temporal changes
title_full Floating objects of the eastern pacific: types, spatial distribution and temporal changes
title_fullStr Floating objects of the eastern pacific: types, spatial distribution and temporal changes
title_full_unstemmed Floating objects of the eastern pacific: types, spatial distribution and temporal changes
title_sort floating objects of the eastern pacific: types, spatial distribution and temporal changes
description The spatial pattern was analyzed of different types of floating objects associated with the tuna fishery in the eastern tropical Pacific (ETP). Of the 34 types of floating objects, four classes were defined: floating objects of terrestrial origin (FOTE), floating objects of marine origin (FOMA), artificial floating objects (FOA), and fish aggregating devices (FAD). The information source was the observer database of the Inter-American Tropical Tuna Commission, for 1987 to 1997. The records of floating objects and fishery effort directed at them were analyzed, spatially and seasonally. The encounter rate and proportion per class were estimated, by one-degree quadrants. Spatial models were obtained for these variables using non-parametric regression. Before 1993, the encounter rates and proportion of FOTE were the most important, located close to the Central American coast. After that year, the region to the west of the Galapagos Islands was the most important. Since 1994, a spatial expansion of the floating objects fishery is observed to the southwest of the ETP, with the use of FAD. FOMA were found to concentrate in two zones: one off the coasts of Ecuador and Peru, and the other off Baja California, Mexico. The spatial patterns of the types of floating objects indicate a seasonal variation. It was concluded that the ETP can be divided into three zones: one coastal and two offshore zones. FOTE dominate in the coastal zone and to the north of the Equator, whereas FAD are the most important in the zone south of the Equator.
publisher Iniversidad Autónoma de Baja California
publishDate 2001
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/473
_version_ 1715723972642865152
spelling oai:cienciasmarinas.com.mx:article-4732019-05-08T18:33:51Z Floating objects of the eastern pacific: types, spatial distribution and temporal changes Los objetos flotantes del Pacífico oriental: Formas, distribución espacial y cambios temporales Solana-Soares, R logs fish aggregating devices eastern tropical Pacific tuna fishery epipelagic zone objetos flotantes de origen terrestre dispositivos agreegadores de peces Oacífico oriental pesa de atún zona epipelágica The spatial pattern was analyzed of different types of floating objects associated with the tuna fishery in the eastern tropical Pacific (ETP). Of the 34 types of floating objects, four classes were defined: floating objects of terrestrial origin (FOTE), floating objects of marine origin (FOMA), artificial floating objects (FOA), and fish aggregating devices (FAD). The information source was the observer database of the Inter-American Tropical Tuna Commission, for 1987 to 1997. The records of floating objects and fishery effort directed at them were analyzed, spatially and seasonally. The encounter rate and proportion per class were estimated, by one-degree quadrants. Spatial models were obtained for these variables using non-parametric regression. Before 1993, the encounter rates and proportion of FOTE were the most important, located close to the Central American coast. After that year, the region to the west of the Galapagos Islands was the most important. Since 1994, a spatial expansion of the floating objects fishery is observed to the southwest of the ETP, with the use of FAD. FOMA were found to concentrate in two zones: one off the coasts of Ecuador and Peru, and the other off Baja California, Mexico. The spatial patterns of the types of floating objects indicate a seasonal variation. It was concluded that the ETP can be divided into three zones: one coastal and two offshore zones. FOTE dominate in the coastal zone and to the north of the Equator, whereas FAD are the most important in the zone south of the Equator. Se analizó la distribución espacial de las distintas formas de objetos flotantes asociados con la pesca del atún del Océano Pacífico oriental (OPO). De los 34 tipos observados, se definieron cuatro clases: objetos flotantes naturales terrestres (OFTE), objetos flotantes naturales marinos (OFMA), objetos flotantes de origen antropogénico (OFA) y dispositivos para agregar peces (DAP). La fuente de información proviene de la base de datos de observadores de la Comisión Interamericana del Atún Tropical, de 1987 a 1997. De ésta, se analizaron los registros de los objetos flotantes por tipo y el esfuerzo pesquero dirigido a ellos, espacial y temporalmente. Se calcularon las tasas de encuentro de objetos flotantes y se estimaron las proporciones de las diferentes clases de objetos flotantes, por cuadrantes de un grado. Estas variables fueron modeladas espacialmente a través de regresiones no paramétricas. Se observó que antes de 1993, las tasas de encuentro y los porcentajes de OFTE fueron los más importantes, localizados principalmente cerca de la costa Centroamericana. A partir de 1994, la región occidental a las islas Galápagos fue la más importante. Este análisis reveló una expansión espacial de las actividades pesqueras sobre objetos flotantes dirigida al sur y al oeste del OPO, por la utilización de los DAP. Asimismo, se observó que los OFMA se concentran en dos zonas: una al sur, frente a las costas de Ecuador y Perú, y la otra frente a Baja California, México. Estos patrones espaciales de las clases de objetos flotantes muestran una variación estacional. De acuerdo con la distribución espacial y temporal de los objetos flotantes, se concluye que el OPO puede dividirse en tres zonas: una zona costera y dos zonas oceánicas. En la zona costera y al norte del Ecuador, dominan los OFTE; en la zona al sur del Ecuador, predominan los DAP. Iniversidad Autónoma de Baja California 2001-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/473 10.7773/cm.v27i3.473 Ciencias Marinas; Vol. 27 No. 3 (2001); 423-443 Ciencias Marinas; Vol. 27 Núm. 3 (2001); 423-443 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/473/412

Ejemplares similares