106 research outputs found
Influencia de los parámetros de soldeo fuerte en la microestructura y propiedades mecánicas de la unión de la aleación base níquel Hastelloy B2
Population structure of Asconema setubalense Kent, 1870 at Concepción Seamount, Canary Islands (Spain). Methodological approach using non-invasive techniques
The hexactinellid sponge Asconema setubalense Kent, 1870is a large bathyal species of the North Atlantic Ocean with a funnel-like body and very large osculum. Populations of A. setubalense have a three-dimensional structure and increase the complexity and biodiversity in their habitat, and are therefore considered to be a habitat-forming species. Nevertheless, at present the information on the extension, biomass, density, population structure, and ecology of this species is scarce, and it could be susceptible to the longline fishing practices that take place in the Canary Islands.
The main objectives of this study are to define a functional and accurate methodology to measure specimens of A. setubalense by comparing differences in users, techniques, and morphometric measurements; to describe the height-size relationship; to present the population size structure of the species, and to establish a relationship between the size of A. setubalense and the environmental variables that can be found at the “Banco de La Concepción” seamount (BC). The obtained results suggest that surface area is the most reliable measurement to define the size of this species, whilst also showing a clear correlation with the height of the species. The selected methodology has made it possible to measure the surface area of 1035 specimens and thus obtain the size structure of the population of A. setubalense in BC. The GAM model that was used to analyse the relationship between the size of A. setubalense and the geomorphologic variables of BC, shows areas where there is a high probability of finding large specimens of the species. The results of this study greatly enhance the knowledge of this species and its habitat, and should be considered in future conservation directives, or in the development of indicators to show the good environmental state of habitats. Additionally, the study improves analysis methodology that, with the appropriate morphometric measurements, can favour the development of future studies of this species, and indeed others with a similar morphology or growth pattern.En prensa2,42
Banco de La Concepción: A new Natura 2000 Marine Site off Canary Islands
The main objective of the LIFE+ INDEMARES project is to contribute to the protection and sustainable
use of the biodiversity in the Spanish seas through the identification of valuable areas for the Natura 2000
Network. The Spanish Institute of Oceanography (IEO) has been in charge of implementing scientific
surveys to map sensitive habitats of seven of the ten INDEMARES areas, and to determine the fisheries
footprint over these areas.
Banco de La Concepci´on is one of the areas chosen to be depicted in the frame of INDEMARES project.
Located at 71 km to the NE of Lanzarote, at the coordinates 29º 55’ Latitude N and 12º 45’ Longitude
W, Banco de la Concepci´on raises from 2,541 m up to its summit at 170 m deep.
The biological richness of Banco de la Concepci´on is very influenced by the deep water up-welling
phenomena, which create a high productivity, attracting a multitude of pelagic species, such as cetaceans,
turtles, sharks, and tunas looking for food. In its vicinity, fishery resources such as goraz, anglerfish, and
hakes, are abundant, and a rich invertebrate fauna cohabits in their bottoms. Banco de la Concepci´on is
a traditional fishing area of oceanic pelagic species, and very good to catch demersal fish; it is highly
visited by Galician and Portuguese drifters and long liners that fish in Mauritania, and mainly by the
Andalusian longliners. In general, its main impacts are related to uncontrolled fishing pressure. The
available information on the anthropogenic impact of the area was scarce, and its level of research was
very poor as well, before INDEMARES project.
Methodology approach complies with a multidisciplinary perspective, having described the area from
geological, oceanographic, biological and fisheries points of view. Several surveys have taken place since
2009 to 2013 at Banco de La Concepci´on waters. Traps, longlines, beam trawls, benthic dredges and box
corers have been used to sample benthic fauna. These last two, plus EM 3002 multibeam echosounder,
PS 18 parametric sub bottom profiler, EA600 monobeam sounder, Seapath 200 positioning sensor and
SV Plus sound velocity calibration sensor were used to make a geophysical study which provides a range
of environmental factors. CTD was used to depict physical conditions of the water column. Finally,
Remote Operated Vehicle Liropus 2000 and different photogrammetric tugged sleds were used to make
a great effort of visual sampling.
Data from VMS (Vessel Monitoring System) were used, combined with interviews to users (fishers), to
describe the fishery uses in the area.
Results from all this field work provide enough information for the administrations to establish a new
Natura 2000 area, trying to reconcile protection of biodiversity and artisanal local economic activities.
This establishment should take place at the end of a process of public consultation to stakeholders which
is taking place in the present and which will help to shape the future Management Plan which will give
details about permitted and prohibited uses
Sensitive Habitats and fishing footprint off Canary Islands seamounts Amanay and El Banquete
The main objective of the LIFE+ INDEMARES project is to contribute to the protection and sustainable
use of the biodiversity in the Spanish seas through the identification of valuable areas for the Natura 2000
Network. The Spanish Institute of Oceanography (IEO) has been in charge of implementing scientific
surveys to map sensitive habitats of seven of the ten INDEMARES areas, and to determine the fisheries
footprint over these areas.
Sur y Oriente de Fuerteventura y Lanzarote is one of the areas chosen to be depicted in the frame of
INDEMARES project, although the study about benthic habitats and fishery footprint carried by IEO
has restricted to Amanay and El Banquete Seamounts. El Banquete really is the extension of southern
continental shelf while Amanay seamount is located at 25 km from Jand´ıa Lighthouse (S of Fuerteventura)
and 55 km from Las Palmas de Gran Canaria, at the coordinates 28º 07’ Latitude N and 14º 44’
LongitudeW, both volcanic buildings raise from more than 2,000 m up to their summits at 25-30 m deep,
separated by a 1.500 m deep channel.
The biological richness of Amanay and El Banquete seamounts is very influenced by the deep water
up-welling phenomena, which create a high productivity, attracting a multitude of pelagic species, such
as cetaceans, turtles, sharks, and tunas looking for food. There is also a high influence from Saharian
up-welling. Both the seamounts tops and their vicinities are often visited by a large artisanal local fishing
fleet which profits of their fishery resources; also a rich invertebrate fauna cohabits in their bottoms. In
general, its main impacts are related to uncontrolled fishing pressure, and maritime navigation. The
available information on the anthropogenic impact of the area was scarce, and its level of research was
very poor as well, before INDEMARES project.
Methodology approach complies with a multidisciplinary perspective, having described the area from
geological, oceanographic, biological and fisheries points of view. Several surveys have taken place
since 2009 to 2013 at Amanay and El Banquete waters. Traps, longlines, beam trawls, benthic dredges
and box corers have been used to sample benthic fauna. These last two, plus EM 3002 multibeam
echosounder, PS 18 parametric sub bottom profiler, EA600 monobeam sounder, Seapath 200 positioning
sensor and SV Plus sound velocity calibration sensor were used to make a geophysical study which
provides a range of environmental factors. CTD was used to depict physical conditions of the water
column. Finally, different photogrammetric tugged sleds were used to make a great effort of visual
sampling. Data from VMS (Vessel Monitoring System) were used, combined with interviews to users
(fishers), landing samplings and scientific observation onboard, to describe the fishery uses in the area
Biodiversidad de los LIC Banco de La Concepción y Espacil marino del oriente y sur de Lanzarote-Fuerteventura. Especies protegidas y formadoras de hábitats
Two large areas belonging to the Canary Islands marine demarcation are part of the
Natura 2000 network as Sites of Community Importance (SCI): “ESZZ15001-Banco de la
Concepción” (total area 609,721.92 ha; depth range 158-2,687 m) and “ESZZ15002-Espacio marino del oriente y sur de Lanzarote y Fuerteventura” (total area 1,433,248.92 ha;
depth range 0-3,300 m). Within the framework of the LIFE INTEMARES IP project, Action A.2.1, and before the designation of these two SCIs as Special Areas of Conservation,
the Spanish Institute of Oceanography (IEO) is responsible for completing information
necessary for the development of management plans.
In the present study, a general analysis of the biodiversity of the two SCIs is carried
out, starting from the updated catalogs, based mainly on previous IEO research and on information from the Canary Islands Biodiversity Data Bank, a comprehensive database of
the Regional Government that draws on all current and historical information, backed by
documents supervised by specialists. Special emphasis is placed on protected species and
habitat forming species, which are considered key elements for management.Dos grandes zonas de la demarcación marina de las islas Canarias forman parte de
la Red Natura 2000 como Lugares de Importancia Comunitaria (LIC): “ESZZ15001-Banco
de la Concepción” (área total 609.721,92 ha; rango de profundidad 158-2.687 m) y
“ESZZ15002-Espacio marino del oriente y sur de Lanzarote y Fuerteventura” (área total
1.433.248,92 ha; rango de profundidad 0-3.300 m). El Instituto Español de Oceanografía
(IEO) ha sido encargado de completar la información necesaria para el desarrollo de los planes de gestión, como paso previo a la declaración de estos LIC como Zonas de Especial
Conservación, en el marco del proyecto LIFE IP INTEMARES, Acción A.2.1.
En el presente trabajo se realiza un análisis general de la biodiversidad de los dos
LIC, partiendo de los catálogos actualizados, basados principalmente en investigaciones
previas del IEO y en la información del Banco de Datos de Biodiversidad de Canarias, una
completa base de datos que recopila toda la información actual e histórica, respaldada por
documentos supervisados por especialistas. Se presta una especial atención a las especies
protegidas y a las formadoras de hábitats, que son consideradas elementos claves para la
gestiónTwo large areas belonging to the Canary Islands marine demarcation are part of the
Natura 2000 network as Sites of Community Importance (SCI): “ESZZ15001-Banco de la
Concepción” (total area 609,721.92 ha; depth range 158-2,687 m) and “ESZZ15002-Espacio marino del oriente y sur de Lanzarote y Fuerteventura” (total area 1,433,248.92 ha;
depth range 0-3,300 m). Within the framework of the LIFE INTEMARES IP project, Action A.2.1, and before the designation of these two SCIs as Special Areas of Conservation,
the Spanish Institute of Oceanography (IEO) is responsible for completing information
necessary for the development of management plans.
In the present study, a general analysis of the biodiversity of the two SCIs is carried
out, starting from the updated catalogs, based mainly on previous IEO research and on information from the Canary Islands Biodiversity Data Bank, a comprehensive database of
the Regional Government that draws on all current and historical information, backed by
documents supervised by specialists. Special emphasis is placed on protected species and
habitat forming species, which are considered key elements for management.En prens
VME indicator species collected during exploratory fishing in Macaronesian seamounts
During the second half of 2012, the longline vessel MARANSA completed 13 fishing trips in international
waters of CECAF Area (Division FAO 34), in nine Seamounts from northeast off Madeira (Lion,
Ampere, Unicorn, Seine, “Camaguay”, “Cabezos”, Dacia and “Fantasma”) to south off the Canary Islands
(Eco/Endeavour), between latitudes 19°N and 35°N, using bottom longlines.
The main target species were demersal species such as Wreckfish (Polyprion americanus) or Splendidalfonsino
(Beryx splendens).
An observer on board recorded the bycatch of Vulnerable Marine Ecosystems (VME) indicator species
in order to evaluate the potential adverse impact of bottom fishing activities on VME and samples of the
specimens for later identification in the laboratory were stored. The main indicator species found were
cold-water corals (black corals, scleractinians and gorgonians) and sponges, species broadly associated
with seamounts.
The shallower banks, Ampere and Dacia in the north and centre of the area, show the greater biodiversity
and the higher percentage of presence of VME indicator species (52% and 53% of the sets respectively),
followed by Endeavour (South of the Canary Islands), 36.4%. In these three banks the species distribution
is strongly related to depth, finding Antipatharia (mainly Stichopathes sp) and Scleractinia (Dendrophyllia
cornigera and D. ramea) in shallower depths and Porifera (Neophryssospongia nolitangere,
Leiodermatium lynceus and Asconema setubalense) in deeper bottoms. Species of the Porifera group are
present in all banks except of so-called ”Cabezos”
Updating the National Baseline of Non-Indigenous Species in Spanish Marine Waters
The introduction of new non-indigenous species (NIS) in Spanish marine waters is addressed under Descriptor 2 of the European Union’s Marine Strategy Framework Directive. National baseline inventories of NIS have been compiled and updated for the three subregions (Western Mediterranean Sea, WMED; Bay of Biscay–Iberian Coast, ABI; Macaronesia, AMA) with data from 1800 to 2021. An overall of 574 species were identified with an alien, cryptogenic, crypto-expanding, or debatable status, mostly invertebrates (~65%) and primary producers (~22%). Of 412 alien species, 80.51% were reported in ABI, 67.82% in WMED, and 66.67% in AMA. Cryptogenic species are more abundant in the WMED (25.25%), compared to AMA (19.77%) and ABI (18.46%). ABI harbors more established species (62.56%) than AMA (45.2%) and WMED (43.56%), contrary to casual records (AMA 31.64%, WMED 23.76%, ABI 13.85%). Invasive species are more abundant (14.36%) in WMED. The ‘transport-stowaway’ pathway accounted for 142 (79.33%), 123 (67.58%), and 169 (85.21%) records in WMED, ABI, and AMA, respectively. The second most common pathway was ‘transport-contaminant’ related to mariculture (~10% of the total), prevalently in ABI with 42 species (23.08%). The Canary Islands stand out for species introduced through oil platforms from throughout the world. ‘Unaided’ was a relevant pathway of secondary introduction into the WMED, particularly of Lessepsian species progressing westwards. Temporal trends in newly introduced species show similar behavior among subregions.This research was funded by Ministerio para la Transición Ecológica y el Reto Demográfico, grant number 11_MM_ESMARES2. The APC was funded by the ESMARES2-C3 project
Prediction of Anti-Glioblastoma Drug-Decorated Nanoparticle Delivery Systems Using Molecular Descriptors and Machine Learning
The theoretical prediction of drug-decorated nanoparticles (DDNPs) has become a very important task in medical applications. For the current paper, Perturbation Theory Machine Learning (PTML) models were built to predict the probability of different pairs of drugs and nanoparticles creating DDNP complexes with anti-glioblastoma activity. PTML models use the perturbations of molecular descriptors of drugs and nanoparticles as inputs in experimental conditions. The raw dataset was obtained by mixing the nanoparticle experimental data with drug assays from the ChEMBL database. Ten types of machine learning methods have been tested. Only 41 features have been selected for 855,129 drug-nanoparticle complexes. The best model was obtained with the Bagging classifier, an ensemble meta-estimator based on 20 decision trees, with an area under the receiver operating characteristic curve (AUROC) of 0.96, and an accuracy of 87% (test subset). This model could be useful for the virtual screening of nanoparticle-drug complexes in glioblastoma. All the calculations can be reproduced with the datasets and python scripts, which are freely available as a GitHub repository from authors. View Full-TextThe APC was funded by IKERDATA, S.L. under grant 3/12/DP/2021/00102—Area 1: Development of innovative business projects, from Provincial Council of Vizcaya (BEAZ for the Creation of Innovative Business Innovative business ventures)
Database of spatial distribution of non indigenous species in Spanish marine waters
Research in marine Spanish waters are focused on several actions to achieve an effectively management on protected areas, with the active participation of the stakeholders and research as basic tools for decision-making. Among these actions, there is one about the knowledge and control on NIS. One of its objectives is the creation of NIS factsheets, which are going to be added to the National Marine Biodiversity Geographical System (GIS) providing complementary information about taxonomic classification, common names, taxonomic synonyms, species illustrations, identification morphological characters, habitat in the native and introduced regions, biological and ecological traits, GenBank DNA sequences, world distribution, first record and evolution in the introduced areas, likely pathways of introduction, effects in the habitats and interaction with native species, and potential management measures to apply. The database will also provide data for (1) the European online platforms, (2) the environmental assessment for the Descriptor 2 (D2-NIS) of the EU Marine Strategy Framework Directive (MSFD), as well as (3) supporting decisions made by stakeholders. It is the result of extensive collaboration among scientist, manager’s and citizen science in the Spanish North-Atlantic, South-Atlantic, Gibraltar Strait-Alboran, Levantine-Balearic and Canary Islands marine divisions, providing an updated overview of the spatial distribution of relevant extended and invasive NIS of recent and established NIS introduced by maritime transport and aquaculture pathways, as well as on cryptogenic or native species in expansion due to the climatic water warming trend
Informe de resultados de la campaña `Maurit-0911'. Estudio de los ecosistemas de la plataforma y margen contiental de Mauritania
Versión del edito
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