Recursos Marinos y Pesquerías

World Conference on Marine Biodiversity 2011, Aberdeen (Scotland, UK). 26-30 September 2011

09/11/11 ,

Tubío-Gómez, A.; Verísimo-Amor, P. & Muiño-Boedo, R. (2011). Spatial and temporal variability of fish communities in the Marine Reserve of Fishing Interest “Ría de Cedeira” (Galicia, NW Spain) and impact of the degree of protection. [digital object presentation]. World Conference on Marine Biodiversity, 26-30 September 2011. Aberdeen (Scotland, UK).

Abstract:

The Marine Reserve of Fishing Interest (RMIP) “Ría de Cedeira”, implemented in 2009, comprises the internal waters of the Ría Cedeira. Within the scope of the marine reserve are three areas with different degrees of protection, a reserve, two areas of special protection, and an area marina. This study characterizes the distribution and abundance of fish in different areas of protection in order to monitor the possible effect that the degree of protection exerted on them.

Using a BACI-type design (before-after-control-impact) are established, depending on their degree of protection, 6 sampling stations. Seasonally, from 2008 to 2010, we determined the abundance of species through visual census conducted by scuba divers along fixed transects of 100m in length.

We analyzed the spatial and temporal differences in fish communities at different levels of protection, type of substrate and time of year, through nonparametric multivariate techniques, using the statistical package PRIMER v.6 (Clarke & Warwick, 2001). Furthermore, accumulation curves were made using the ESTIMATES program (Colwell, 2009) to determine species richness in each of the study areas.

We have also collaborated on two other presentations:

– Félix-Hackradt, F.C.; Werner-Hackradt, C.; García-Charton, J.A.; Treviño-Otón, J.; Segovia-Viadero, M.; Tubío-Gómez, A.; Pérez-Ruzafa, A. & Marcos-Diego, C. (2011). Factors influencing habitat selection by fish recruits at rocky reefs in Western Mediterranean Sea. [oral presentation]. World Conference on Marine Biodiversity, 26-30 September 2011. Aberdeen (Scotland, UK)

– Werner-Hackradt, C.; Félix-Hackradt, F.C.; Treviño-Otón, J.; Segovia-Viadero, M.; Pérez-Ruzafa, A.; & Marcos-Diego; Tubío-Gómez, A. & García-Charton, J.A. (2011). Density effect and habitat characteristics of the distribution of predators fish species (Perciformes: Serranidae) in Mediterranean rocky reefs. [digital object presentation]. World Conference on Marine Biodiversity, 26-30 September 2011. Aberdeen (Scotland, UK)

Programa de análise textural de datos de sondas splitbeam: Ecosons splittex

03/11/11 ,

Acabamos de colgar na nosa sección de descargas o programa de análise textural de datos de sondas splitbeam Ecosons splittex. Con este programa poderedes realizar unha análise de texturas dos ecogramas angulares obtidos con sondas splitbeam. A partir de arquivos .raw xerados pola sonda o programa permite calcular os parámetros de textura definidos por Haralick (1973) (alternativo) e realizar, a partir dos valores das mesmas, unha análise estatística para agrupar os diferentes puntos de mostraxe basándose nas características angulares do sinal de resposta. Permite, ademais, xerar diferentes saídas gráficas e exportar arquivos xyz para traballar en SIG.

No arquivo .zip que vos podedes baixar atoparedes, xunto co programa para correr en octave, un manual de uso, así como arquivos de exemplo da entrada que hai que proporcionar ó programa e da saída que se xera.

Esperamos que vos sexa de utilidade e vos animamos a nos escribires con calquera dúbida.

Proyectos