The community of deep-sea decapod crustaceans between 175 and 2600m in submarine canyons of a volcanic oceanic island (central-eastern Atlantic)

Pajuelo, José G.; Triay‐Portella, Raül; Santana, J. I.; González, José A.

doi:10.1016/j.dsr.2015.08.013

Cited by 14 publications

(7 citation statements)

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“…show changes between seasons in each area were less than 0.75 °C and 0.024 PSU for each 50 m in the bathymetric area of distribution ( Figure 9). Related with this, Pajuelo et al (2015) also found that the bathymetric distribution of C. affinis is not linked to a specific water mass with certain conditions of salinity and temperature.…”

Section: Discussionmentioning

confidence: 62%

“…Related with this, Pajuelo et al. () also found that the bathymetric distribution of C. affinis is not linked to a specific water mass with certain conditions of salinity and temperature.…”

Section: Discussionmentioning

confidence: 87%

“…Deep waters between 700 and 1,000 m are characterized by the AIW and the MW, the latter of which extends up to 2,000 m depth (Hernández‐Guerra et al., ; Machín et al., ). These changes in temperature and salinity with depth result in the presence of thermal and density barriers that affect the vertical distribution of decapods (Pajuelo, Triay‐Portella, Santana, & González, ). In addition, the Canary Islands are biogeographically included in the Azores‐Madeira‐Canaries ecoregion, within the Lusitanian province of the Temperate Northern Atlantic realm (Spalding et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Spatio‐temporal variation in biomass of the deep‐sea red crab Chaceon affinis in Gran Canaria Island (Canary Islands, Eastern‐Central Atlantic)

2017

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The spatial and temporal biomass distribution of Chaceon affinis and its vulnerability to fishing activity in Gran Canaria (Canary Islands) were investigated. The first goal was to assess the influence of the slope steepness and substrate on the size of crab patches, size of the crabs, and crab biomass. The second goal was to evaluate spatial and temporal variation in the biomass over a 15‐month period. The last goal was to assess the influence of fishing activity upon the reduction in the biomass over the same 15‐month period. Only two or three locations in the sampling area generated high‐biomass contour patches. When these patches were superimposed on the isobath lines, they were coincident with the main depth range described for the species in the area. The map of the biomass values clearly showed three structures with cores of the highest biomass in both muddy and rocky‐muddy areas. The biomass was higher on muddy than on rocky‐muddy bottoms. Biomass was twice as high when steepness was reduced to one third between isobaths of 500 and 900 m. The size of crab patches increases linearly with the decrease in slope steepness. The spatial structure of crabs remained fairly stable over time, showing that biomass changes with depth over time. Maps of the estimated biomass values over the 15‐month period showed the same two main patches over time with the cores of highest biomass separated by a distance of between 4.2 and 4.5 km. Although the bathymetric distribution by sexes showed temporal changes, with a displacement to deeper areas made by both sexes over the studied period, only a partial temporal segregation between males and females was observed. During the study period, crabs underwent a significant decline in biomass and this was consistent with the combined catches of both commercial and experimental fishing in the area. Due to its low mobility, C. affinis is highly vulnerable to local depletion by intensive fishing efforts.

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Section: Discussionmentioning

confidence: 62%

“…Related with this, Pajuelo et al. () also found that the bathymetric distribution of C. affinis is not linked to a specific water mass with certain conditions of salinity and temperature.…”

Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Spatio‐temporal variation in biomass of the deep‐sea red crab Chaceon affinis in Gran Canaria Island (Canary Islands, Eastern‐Central Atlantic)

2017

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“…Una de las especies de mayor abundancia en número de individuos y CPUE promedio fue el camarón P. longipes, coincidiendo con lo encontrado por PAJUELO et al (2015) en el Atlántico centro-oriental (Islas Canarias), quienes encontraron que especies del género Plesionika dominan en la pesca con nasas en comparación con otros métodos de pesca como el arrastre. Otros autores afirman que la familia Pandalidae es muy abundante en aguas profundas del Mar Mediterráneo, el Mar Egeo, las Islas Canarias y Archipiélago de Madeira Atlántico nororiental, siendo Plesionika narval un recurso importante para la pesquería artesanal (ARCULEO et al, 2002;PAJUELO et al, 2015).…”

Section: Discussionunclassified

Composición y distribución de los crustáceos de profundidad capturados con nasas en el área marina del departamento del Magdalena caribe colombiano

Pérez

Franco-Herrera

Páramo

2018

Bol. cient. mus. hist. nat. univ. caldas

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Objetivo: Determinar la composición y distribución de los crustáceos de profundidad, capturados con nasas en las ecorregiones Magdalena (MAG), Tayrona (TAY) y Palomino (PAL) del área marina del departamento del Magdalena, Colombia. Alcance: Información base para el manejo de las especies de crustáceos de aguas profundas de potencial importancia comercial. Metodología: Se realizaron cuatro muestreos entre octubre y noviembre de 2016 en las tres ecorregiones, entre los 200 y 500 metros de profundidad, a bordo de un barco de pesca artesanal que utiliza nasas experimentales para la colecta de crustáceos. Se utilizó la prueba no paramétrica de Kruskal-Wallis para determinar diferencias entre las ecorregiones y los principales índices ecológicos (diversidad, riqueza, dominancia y equidad) para determinar la heterogeneidad de las especies. Principales resultados: Se capturaron 131 individuos, pertenecientes a 12 familias y 20 especies, de las cuales seis son de interés comercial en otros países. Las especies más abundantes fueron Achelous spinicarpus, Plesionika longipes y Heterocarpus ensifer, y las de mayor tamaño Eunephrops bairdii y el camarón Aristaeomorpha foliacea. Las ecorregiones Palomino y Tayrona presentaron una mayor similitud en cuanto a composición de especies, así como los mayores valores de diversidad, probablemente por la mayor productividad generada en estas áreas. La amplia distribución y abundancia de P. longipes reportada dentro de este estudio y estudios anteriores, permiten que la especie se pueda considerar como un recurso pesquero potencial para el Caribe colombiano. Conclusiones: Esta investigación provee información valiosa sobre la composición y distribución de los crustáceos de profundidad en el Caribe colombiano, susceptibles a ser aprovechados con métodos de pesca artesanal como las nasas. Sin embargo, se deben realizar más estudios, sobre la biología y ecología de las especies potenciales para la pesca, que permitan generar bases para un manejo sostenible bajo un enfoque ecosistémico.

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“…The Canary region is characterized by the presence of three water masses in the first 1000 m of depth, the Eastern North Atlantic Central Water, the Antarctic Intermediate Water, and the Mediterranean Water, located at different depths and with characteristic thermohaline properties (Hernández-Guerra et al 2002). These water masses generate changes in salinity and particularly in temperature, resulting in the presence of density and thermal barriers that affect the distribution of decapod crustacean (Pajuelo et al 2015) and fish species (Pajuelo et al 2016) in the region.…”

Section: Introductionmentioning

confidence: 99%

Artisanal fisheries in the Canary Islands (eastern-central Atlantic): description, analysis of their economic contribution, current threats, and strategic actions for sustainable development

González¹,

González-Lorenzo²,

Tejera³

et al. 2020

Acta Ichthyol. Piscat.

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fisheries in the Canary Islands (eastern-central Atlantic): description, analysis of their economic contribution, current threats, and strategic actions for sustainable development. Acta Ichthyol. Piscat. 50 (3): 269-289. Background. Fishing is a primary activity of great importance in the Canaries and has traditionally played an important role in reducing poverty, in job creation, strengthening food security and sovereignty, and increasing the value of its products. This study is needed to analyze fishing contribution in a region strongly based on tourism. Aims were: to update the inventory of fishing techniques, to detail the biodiversity involved, and for the first time to analyze the contribution of the landings. We also identify threats to the activity and draft a plan with strategic actions for its sustainability. Materials and methods. Data on the fisheries and the 2007-2018 series of landings were taken from the regional government website. Once the database was refined, data were analyzed in main four environmental resource categories: shellfish (SHS), demersal fish (DMF), coastal pelagic fish (CPF), and oceanic pelagic fish (OPF). To analyze the economic contribution of the fisheries, first-sale reference prices were compiled from fisheries entities. To estimate the contribution of this sector to the regional GDP, its economic value was compared with the mean value of GDP for 2014-2018 GDP. Results. The versatility is the main characteristic of the fleet, which was stabilized around 600 vessels within 2016-2018. Fishing techniques vary enormously, and eight categories of fishing gear were identified. Total landings ranged between 5560 t in 2007 and 15 466 t in 2016, with a mean value of 11 254 t • y-1. SHS reached a mean value of 111 t, representing only 1%, DMF 1683 t (16%), CPF 1926 t (17%), and OPF 7533 t (65%). Biodiversity targeted by these fisheries throughout the 2007-2018 period involved about 200 species. As a primary sector, the Canary Islands' fishing activity made a mean value of the economic contribution of €73.19 million per year at first-sale in 2007-2018, contributing 0.19% of the regional GDP overall during 2014-2018. When the fishing activity is considered together with other local socioeconomic sectors in the added-value chain of seafood, it contributes acceptably to the regional economy. Conclusion. Overexploitation of fish stocks is the greatest problem to solve, followed by poaching and the growth of intense recreational fishing. Ad-hoc strategic and structured actions for the sustainable development of the fishing activity are proposed.

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The community of deep-sea decapod crustaceans between 175 and 2600m in submarine canyons of a volcanic oceanic island (central-eastern Atlantic)

Cited by 14 publications

References 113 publications

Spatio‐temporal variation in biomass of the deep‐sea red crab Chaceon affinis in Gran Canaria Island (Canary Islands, Eastern‐Central Atlantic)

Spatio‐temporal variation in biomass of the deep‐sea red crab Chaceon affinis in Gran Canaria Island (Canary Islands, Eastern‐Central Atlantic)

Composición y distribución de los crustáceos de profundidad capturados con nasas en el área marina del departamento del Magdalena caribe colombiano

Artisanal fisheries in the Canary Islands (eastern-central Atlantic): description, analysis of their economic contribution, current threats, and strategic actions for sustainable development

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