Consorcio Insular de la Reserva Mundial de la Biosfera La Palma

La Palma del Condado, Spain

Consorcio Insular de la Reserva Mundial de la Biosfera La Palma

La Palma del Condado, Spain
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Sangil C.,Consorcio Insular de la Reserva Mundial de la Biosfera La Palma | Sangil C.,University of La Laguna | Martin-Garcia L.,Consorcio Insular de la Reserva Mundial de la Biosfera La Palma | Martin-Garcia L.,University of La Laguna | And 4 more authors.
Estuarine, Coastal and Shelf Science | Year: 2013

The structure of demersal fish assemblages of commercial interest was studied at 51 sites on La Palma Island (Canary Islands, northeastern Atlantic). On this island, demersal fish populations are limited and independent from other islands. As deep water separates the islands and the shallow sublittoral platforms are not continuous, adult inter-island migrations are not possible except between the islands of Lanzarote and Fuerteventura. Otherwise, each island functions as a closed system, and the status of an island fish assemblage depends on local environmental conditions and activities performed in situ by the islanders. These circumstances provide a unique opportunity to test the intrainsular variability of fish assemblages. With this background, environmental parameters, fishing pressure and distance to the MPA were considered to identify the main factors explaining the spatial variation of fish assemblages off La Palma Island. Twenty-six fish species were recorded, but 60% of the total fish biomass was represented by only five species (Sparisoma cretense, Pomadasys incisus, Canthidermis sufflamen, Diplodus cervinus cervinus and Bodianus scrofa). However, the structure of assemblages was heterogeneous in response to different variables and showed substantial spatial variation. The assemblages were strongly modified by the presence of upright seaweed cover, fishing activities, and certain environmental variables. Differences were more pronounced in species that occupied the higher trophic levels. The most disturbed assemblages were those located in areas with lower upright seaweed cover and with higher fishing pressure, whereas the best-preserved assemblages corresponded to sites with controlled fishing activities, located within the MPA. © 2013 Elsevier Ltd.


Gonzalez J.A.,Instituto Canario Of Ciencias Marinas | Gonzalez J.A.,University of Las Palmas de Gran Canaria | Martin L.,Consorcio Insular de la Reserva Mundial de la Biosfera la Palma | Herrera R.,Instituto Canario Of Ciencias Marinas | And 4 more authors.
Journal of the Marine Biological Association of the United Kingdom | Year: 2012

The present paper is the first annotated account listing all species of Cirripedia: Thoracica recorded from the Canary Islands (eastern Atlantic Ocean) together with notes on their distribution and ecology. Voucher specimens have been deposited as reference material in the collection of the Instituto Canario de Ciencias Marinas. Seventeen species are listed and seven of them are recorded for the first time for the Canaries: Lepas hilli, Conchoderma virgatum, Xenobalanus globicipitis, Chthamalus sp. (cf. C. proteus), Acasta cyathus, Balanus trigonus and Perforatus perforatus. Copyright © 2011 Marine Biological Association of the United Kingdom.


Sangil C.,Consorcio Insular de la Reserva Mundial de la Biosfera la Palma | Sangil C.,University of La Laguna | Sanson M.,University of La Laguna | Afonso-Carrillo J.,University of La Laguna | Martin-Garcia L.,Consorcio Insular de la Reserva Mundial de la Biosfera la Palma
Botanica Marina | Year: 2010

Our finding of extensive off-shore meadows of Penicillus capitatus in the Canary Islands is the first direct observation of this species off the eastern Atlantic islands. Populations form scattered patches between 20 and 27 m depths, leading to denser meadows between 28 and 50 m depths. Total population coverage is ca 11.16 ha. Plant morphology, cover and density changed through the year. In September, well-developed individuals were dominant whereas the Espera-phase was dominant in January and March. The highest mean cover and density values were 75.42% cover and 1245 well-developed individuals m-2, respectively. Specimens reach only 6 cm in height, which is shorter than individuals from the Mediterranean Sea and the Western Atlantic, and they often grow intermixed with species of Caulerpa and Halophila decipiens. It is difficult to determine whether this is a recent introduction, because the species may have been overlooked in the past. Nevertheless, the extensive meadows found in La Palma may be related to recent increases in sea water temperature, and the tropicalization of the marine flora and fauna of the Canary Islands detected during the past decade. © 2010 by Walter de Gruyter.

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