A5029773069- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Marine animal studies overview
- Fish Ecology and Management Studies
- Ichthyology and Marine Biology
- Coastal and Marine Management
- Hair Growth and Disorders
- Fish Biology and Ecology Studies
- Underwater Acoustics Research
- Remote Sensing and LiDAR Applications
- Marine Ecology and Invasive Species
- Avian ecology and behavior
- International Maritime Law Issues
- Isotope Analysis in Ecology
Portuguese Sea and Atmosphere Institute
2013-2019
Instituto de Investigacao das Pescas e do Mar
2005-2012
Scottish Government
2009
Centro Tecnológico del Mar
2006
Instituto Nacional de Investigaciones Agropecuarias
2005
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 477:15-28 (2013) - DOI: https://doi.org/10.3354/meps10180 Effects of environmental variability on different trophic levels North Atlantic food web Vitor H. Paiva1,2,*, Pedro Geraldes3, Marques4, Rula Rodríguez4, Stefan Garthe2, Jaime A. Ramos1 1IMAR/CMA and Environmental Research Centre, Department Life...
This study describes changes in abundance and spatial distribution of Atlantic chub mackerel the Portuguese waters Spanish Gulf Cadiz using data from acoustic surveys 1995 to 2010 fishery since 1958. The dynamics sardine (Sardina pilchardus) are compared species interactions discussed. From 2007 2009, biomass, as measured acoustically, ranged between 69000 238000 t concentrated off western coast (~50%) (~30%). landings have varied with periods high around 1970 recent years. Since 1986 been...
Abstract Zwolinski, J., Morais, A., Marques, V., Stratoudakis, Y., and Fernandes, P. G. 2007. Diel variation in the vertical distribution schooling behaviour of sardine (Sardina pilchardus) off Portugal. – ICES Journal Marine Science, 64: 963–972. patterns pelagic fish schools were studied by examining their echotraces from repeated acoustic survey transects at three inshore sites Portuguese coast. At two sites, was dominant species, echotrace characteristics similar to those reported...
Abstract Silva, A., Skagen, D. W., Uriarte, Massé, J., Santos, M. B., Marques, V., Carrera, P., Beillois, Pestana, G., Porteiro, C., and Stratoudakis, Y. 2009. Geographic variability of sardine dynamics in the Iberian Biscay region. – ICES Journal Marine Science, 66: 495–508. The spatio-temporal distribution, demographic structure, recruitment, mortality within region is described using area-disaggregated data collected during acoustic surveys at ports since mid-1980s. Multiple regression...
Abstract The feasibility of using airborne lidar (Light Detection and Ranging) was studied to assess the early juvenile fractions main pelagic fish species coastal Atlantic waters southern Europe (anchovy, sardine, mackerel, horse mackerel). Field comparisons with more established echosounder methods were undertaken in summers 1998 1999 during recruitment period sardine anchovy selected areas, presence a variety oceanographic environmental conditions. Backscattered energies as well types...
Knowledge of the dynamics micronekton at seamounts is critical to understanding ecological role these ecosystems. Active acoustic techniques are an effective tool monitor distribution and movements pelagic organisms. We carried out several day- nighttime active surveys over a 3-year period (2009-2011) characterize spatial temporal backscatter on two (Condor Gigante) in Azores surrounding open-waters. The highest mean volume backscattering strength (MVBS) was consistently found water column...
Spatial and temporal variability in reproductive parameters was studied combination with population demography to estimate sardine (Sardina pilchardus) annual fecundity, as an indicator of its potential. Samples collected from commercial landings were used determine the monthly proportion active females duration spawning season, while data obtained during 2002, 2005, 2008 Daily Egg Production Method surveys analyze relationship between (batch fraction) individual biological characteristics...
Estimation of fish abundance from acoustic surveys requires the estimation total backscatter target species in sampled region. Although arithmetic mean is an unbiased estimator for regular or random sampling designs, under presence spatial structure, its use leads to a loss information and variance not trivial. Here, we tackle these shortcomings by building model using spline-based generalized additive models (GAMs). GAMs were used provide local global estimates backscatter, their precision...
In a period when the Iberian sardine stock abundance is at its historical minimum, knowledge of juvenile’s distribution crucial for development fishery management strategies. Generalized additive models were used to relate juvenile presence with geographical variables and spawning grounds (egg abundance) model concurrent environmental conditions. Three core areas identified: Northern Portuguese shelf (centred off Aveiro), coastal region in vicinity Tagus estuary, eastern Gulf Cadiz. Spatial...
Data from 10 acoustic surveys targeting sardine (spring and autumn), 3 blue whiting (spring) 9 groundfish (summer autumn) were used to describe the distribution relative abundance of snipefish (Macroramphosus spp.) off Portugal Gulf Cadiz in recent years (1998-2003). Snipefish (8-17 cm) regularly found Portugal, occasionally large concentrations, but absent Cadiz. Off northern distributed along outer shelf upper slope, clearly separated (the most abundant species inner shelf) partially...
Abstract An ecosystem approach to fisheries management (EAFM) is as a new paradigm in management. In this study, combination of geographic information systems (GISs) and multi-criteria decision-making method (MCDM) proposed framework supporting an European sardine (Sardina pilchardus, Clupeidae) fishery Portugal. This case study was chosen due the recent severe decline shown by species. To develop EAFM for fishery, set criteria were defined based on literature review expert knowledge....
Event Abstract Back to Atlantic chub mackerel (Scomber colias) growth and reproduction off the Portuguese coast in relation population dynamics Cristina Nunes1*, Andreia V. Silva1, Diana Feijó1, Eduardo Soares1, Ana Carolina Porfírio2, Delfina Morais1, Georgina Correia1, Pedro Da Conceição1, Maria Do Carmo Corina Chaves1, Vitor J. Marques1, Amorim1, Leonel Gordo2, Moreno1 Alexandra A. 2 1 Institute of Ocean Atmosphere (IPMA), Portugal Centro de Estudos do Ambiente e Mar, Faculdade Ciências...