1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario registrado en Universia


Opción 1: Descargar recurso

Detalles del recurso

Descripción

Portuguese commercial Elasmobranch landings were analysed for the period 1986 – 2009 and revealed that some species may be in danger of overfishing. Landings totalled 122,515 mt, with an average of 5,105 mt landed yearly, with captured sharks, skates and rays representing 8 orders, 14 families and 44 species. Annual landings for the fishery generally decreased over time, with a corresponding increase in price per kilogram. The most landed group, skates (Raja sp.), accounted for 33% of the landings, or 40,344 mt. They were followed by lesser spotted catsharks (Scyliorhinus sp.), Portuguese dogfish (Centroscymnus coelolepis), leafscale gulper sharks (Centrophorus squamosus), blue sharks (Prionace glauca) and gulper sharks (Centrophorus granulosus) (accounting for 12%, 11%, 10%, 9% and 8% of the landings, respectively). In the absence of CPUE data, comparative trends of landings and price over time were used as an indicator of the status of specific Elasmobranch species. Centrophorus granulosus, smoothounds (Mustelus sp.), torpedo rays (Torpedo sp.), requiem sharks (Carcharhinus sp.) and angel sharks (Squatina sp.) displayed indications of possible over-exploitation, with significantly decreasing landings and increasing prices over time, and merit the focus of future research. The pattern shown by fishing effort over time (i.e. number of fishing vessels over time) displayed a marked decrease, although this was substantially less than the decrease shown by landings of the species mentioned earlier. It is therefore unlikely that such a decrease in landings is justified solely by a decrease in number of fishing vessels. Similarly, the increase in price shown for all species was largely superior to the increase in inflation, which would suggest that the increase in inflation alone would not account for the increase in price. All results and data corroborate the notion that some species are, in fact, over-exploited and in need of immediate management and conservation measurements. These findings were substantiated by min/max auto-correlation factor analysis (MAFA), which shows that the most important trend is that of a decrease in landings of those species where overfishing in indicated.

Pertenece a

Repositorio da Universidade dos Açores  

Autor(es)

Correia, João P. -  Morgado, Fernando -  Erzini, Karim -  Soares, Amadeu M. V. M. - 

Id.: 69665874

Idioma: eng  - 

Versión: 1.0

Estado: Final

Palabras claveEuropean Union Common Fisheries Policy - 

Tipo de recurso: article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: openAccess

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 24-feb-2017

Contacto:

Localización:
* "ARQUIPÉLAGO. Life and Marine Sciences". ISSN 0873-4704. Nº 33 (2016): 81-109
* 0873-4704

Otros recursos del mismo autor(es)

  1. Estimation of gillnet and hook selectivity for Carangoides fulvoguttatus (Forsskal, 1775) captured off Kanyakumari coast of India Selectivity and fishing powers of multi-mesh gillnets with mesh sizes of 13.5, 14, 14.5 and 15 cm an...
  2. Biology, abundance and distribution of Pennant’s swimming crab, Portumnus latipes (Pennant, 1777) along the coast of Portugal The biology, ecology and distribution of Pennant's swimming crab (Portumnus latipes) along the coast...
  3. Stress responses of the sea cucumber Holothuria forskali during aquaculture handling and transportation Animal welfare during handling and transportation to aquaculture facilities or public aquaria is com...
  4. Small-scale coastal fisheries in European Seas are not what they were: Ecological, social and economic changes 11 páginas, 1 figura, 1 tabla
  5. A regulation-based classification system for marine protected areas: A response to Dudley et al. [9] Dudley et al. [9] commented on our paper [11], arguing that the current IUCN objective-based categor...

Otros recursos de la mismacolección

  1. Fishes of the Northern Mid-Atlantic Ridge collected during the MAR-ECO cruise in June-July 2004 : An Annotated Checklist Records of the fishes from the northern Mid-Atlantic Ridge (MAR) (41⁰N - 60⁰N) sampled during two re...
  2. Island Biology 2016 : Conference program and abstracts : International Conference on Island Evolution, Ecology and Conservation 2nd International Conference on Island Evolution, Ecology and Conservation: Island Biology, 2016, 18...
  3. The sea of the Azores : scientific forum for decision support […] Nunca como agora se colocou a necessidade de procurar gerir e articular os múltiplos usos do mei...
  4. Developing a Sustainable Aquaculture Industry in the Azores : Proceedings of the International Workshop International Workshop, Horta 2-5-June 2008.
  5. Applied Aspects of Marine Parasitology : Proceedings of the International Workshop on Marine Parasitology International Workshop on Marine Parasitology, Horta 21-24 May 2006.

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.