Miguel Gaspar

Miguel Gaspar
Instituto Português do Mar e da Atmosfera | IPMA · Divisão de Modelação e Gestão de Recursos de Pesca

PhD

About

253
Publications
70,208
Reads
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Citations
Introduction
I'm a Senior Researcher at the Portuguese Institute for the Sea and Atmosphere (IPMA). In 1990, I completed a degree in marine biology and fisheries at the University of Algarve (Portugal) and undertook my PhD at the same university. I'm responsible for the management of the bivalve fishery in Portugal. I have been the coordinator of several research projects regarding management of small-scale fisheries as well as the ecological effects of artisanal fishing and other anthropogenic impacts on marine ecosystems, aiming to provide policy makers with the scientific information to best manage the marine environment and fish stocks. I'm the author or co-author of more than 150 publications in peer-reviewed journals and book chapters. I'm a member of the editorial board of Scientia Marina.
Additional affiliations
June 2018 - present
Instituto Português do Mar e da Atmosfera
Position
  • Senior Researcher
March 2000 - June 2018
Instituto Português do Mar e da Atmosfera
Position
  • Senior Researcher
Education
June 2018 - June 2018
Universidade do Algarve
Field of study
  • Marine Sciences
September 1990 - June 1997
Universidade do Algarve
Field of study
  • Marine Sciences
September 1985 - December 1990
Universidade do Algarve
Field of study
  • Marine Biology and Fisheries

Publications

Publications (253)
Article
Full-text available
This study analysed the shell morphology, morphometric relationships and relative growth in three topshell species (Phorcus lineatus, Phorcus sauciatus and Steromphala umbilicalis) collected in the Algarve coast (southern Portugal). A total of 1382 individuals were sampled (465 P. lineatus, 447 P. sauciatus and 470 S. umbilicalis) and all species c...
Article
This study aimed to characterize the catches, quantify fishing yield, bycatch and discards, and also estimate damage and mortality rates using hand dredges with two different mesh sizes (20 and 25 mm) for harvesting the wedge clam (Donax trunculus). A total of 160 tows were performed in Lota Beach and Armona Island in the Algarve coast (southern Po...
Article
This study analysed and compared the shell shape, morphometrics and relative growth of four sympatric limpet species ( Patella depressa , Patella ulyssiponensis , Patella vulgata and Siphonaria pectinata ) collected at Praia da Luz in Lagos (Algarve coast – southern Portugal). Morphometric relationships were established through regression analysis...
Technical Report
Full-text available
Despite their prevalence in European and Atlantic waters, knowledge of best-practice methods of data collection in SSF is currently lacking. This has led to the collection of data that is often incomplete or of poor quality, and that underplays the fisheries’ wider importance. Furthermore, the diversity of gear, target species, seasonality, and geo...
Article
Coastal bivalve populations are characterized by large temporal fluctuations, driven by recruitment success dependent on environmental conditions. The present study evaluated the relationship of rainfall, chlorophyll-α, sea surface temperature (SST) and wind, with the biomass of four commercial bivalve species (Spisula solida, Donax trunculus, Cham...
Article
The epifauna associated to farmed mussels in southern Portugal coast was analysed, aiming at identifying the species with spreading potential through commercial transport. The presence of a relevant number of the species here found is not reported to at least one of the common mussel export/transposition countries. Indeed, important species biogeog...
Article
Full-text available
Ocean acidification (OA) will decrease shellfish growth and survival, with ecological and economic consequences for fisheries and aquaculture. However, the high variability of results among experiments, and the lack of long-term studies, make it difficult to predict the effect that OA will have on bivalve species. We tested the long-term effect of...
Technical Report
As tarefas do projeto têm vindo a ser todas executadas, no entanto com atrasos em algumas, por motivos diferentes. A tarefa da governança participativa (Tarefa 8) teve início com grande atraso, pelas dificuldades na contratação. Os resultados desta tarefa são essenciais para a capacitação do setor da apanha de bivalves e para dar suporte à elaboraç...
Article
This study reports the reproductive cycle, condition index, size at first maturity, growth and the morphometric relationships of the common cockle Cerastoderma edule in Ria de Aveiro (NW Portugal), fundamental knowledge in fisheries management planning and ecosystem conservation. The reproductive cycle was monitored for a period of two years, from...
Article
Understanding the diversity and community composition of marine communities in coastal areas is of utmost importance to understand how overlapping anthropogenic pressures impact the marine environment. The demersal and epibenthic communities of the Portuguese northern continental shelf were surveyed using a bottom trawl to understand their taxonomi...
Article
Full-text available
This is the first attempt to apply an expert-based ecological vulnerability assessment of the effects of climate change on the main marine resources of Portugal. The vulnerability, exposure, sensitivity, adaptive capacity, and expected directional effects of 74 species of fish and invertebrates of commercial interest is estimated based on criteria...
Presentation
Full-text available
Alimente quem o alimenta. A esta hora, Miguel Gaspar, investigador do Instituto Português do Mar e da Atmosfera (IPMA), está em casa a preparar o almoço. A mensagem que nos deixa é simples: adquirindo peixe fresco de origem nacional, está a contribuir para a sustentabilidade do setor, a garantir postos de trabalho e a ajudar a economia portuguesa....
Article
This study describes Apseudopsis formosus sp. nov., a new apseudomorph tanaidacean species from the Ria Formosa lagoon (southern Portugal). Species description was based on 223 individuals (22 juveniles, 60 males and 141 females), comprising diverse developmental stages (juveniles II, males I and II, preparatory, copulatory and intermediate females...
Article
Full-text available
The present study reports six new and consecutive records of the Atlantic blue crab (Callinectes sapidus Rathbun, 1896) in the southern coast of Portugal. Specimens were caught during less than two months (22nd November 2018 – 18th January 2019) as bycatch of trammel nets operated by small-scale fishing boats in scattered locations along the Algarv...
Article
Non-indigenous species (NIS) are increasingly widespread and abundant in coastal areas, hence being considered indicators to assess the environmental status of marine waters under the Marine Strategy Framework Directive. However, information on the effects of biological invasions on species composition and abundance is still scarce, particularly fo...
Article
This study describes the reproductive cycle of the common limpet (Patella vulgata) and rough limpet (Patella ulyssiponensis) from the Algarve coast (southern Portugal). Individuals of both species were sampled monthly during two consecutive years, and subjected to gonad histology and calculation of the mean gonadal index (GI). Both species had bala...
Article
A multimetric approach was used to detect structural, compositional, and functional shifts in the underlying macrobenthic communities of an offshore mussel (Mytilus galloprovincialis) farm in a Portuguese Aquaculture Production Area. Sampling stations distributed inside and outside this area were used to evaluate sediment descriptors and macrobenth...
Article
This study reports a detailed description of the bycatch, discards and survival rates in the cuttlefish (Sepia officinalis) trap fishery off the Algarve coast (southern Portugal). A total of 86 fishing surveys involving 6,311 cuttlefish traps were performed between May and September from 2009 to 2014. Bycatch species were caught in 1,037 traps (byc...
Article
Harvested populations of the sea urchin (Paracentrotus lividus) from the northwestern (Carreço) and southwestern (Aljezur) coasts of Portugal were surveyed to describe the species reproductive cycle and assess possible relationships with geographical location and seawater temperature. Individuals were sampled monthly to analyze gonad histology, mea...
Article
The present study reports a detailed description of the catches of cuttlefish (Sepia officinalis) in the trap fishery performed seasonally off the Algarve coast (southern Portugal). A total of 86 fishing surveys were performed during the fishing season (May–September) from 2009 to 2014, on sandy bottoms at bathymetrics ranging from 8 to 10 m depth....
Article
Macrobenthic responses to dredging activities were evaluated in a mesotidal coastal lagoon (Ria Formosa – South Portugal). Four areas (2 dredged and 2 non-dredged) were analysed along different dredging situations (pre-dredging, during dredge 1, during dredge 2 and post-dredging). Beyond the evaluation of sediment descriptors and classical ecologic...
Article
Full-text available
The Atlantic blue crab Callinectes sapidus Rathbun, 1896 is native in the western Atlantic, however it is a non-indigenous species across Europe since 1900, among other world regions. In this paper, we report the first occurrences of this species in the Ria Formosa lagoon and in the Guadiana estuary (SW-Iberian Peninsula, Europe) which occurred in...
Article
Full-text available
The present study reports the weight-length (W-L) relationships and assesses the relative growth of the common cuttlefish (Sepia officinalis) from the Algarve coast (southern Portugal). Overall, were sampled and analysed 5883 individuals with broad ranges in both mantle length and total weight, with females being significantly larger and heavier th...
Article
We used a new, easy to use, highly selective, low impact and cheap method of sampling in the swash zone of a sandy beach to obtain catch per unit effort data (CPUE) for Pennant's swimming crab, Portumnus latipes (Pennant, 1777). Metal stakes baited with sardines were used to attract the crabs that were caught by hand. Crab density was estimated bas...
Article
Full-text available
• Populations of marine bivalves are subject to large interannual fluctuations as a result of their sensitivity to unfavourable environmental conditions. These populations have a strong dependence on recruitment, which constitutes a risk to stock conservation and the sustainability of the commercially exploited species. Bivalve sanctuaries comprisi...
Article
Full-text available
Although the bivalve dredge used on the Algarve coast (southern Portugal) is highly selective for the target species , in some periods of the year the bycatch can exceed the catch of the commercial species. The present study aimed to quantify the bycatch and discards, estimate damage and mortality, and propose management measures to minimize discar...
Poster
Full-text available
Bivalve harvesting in the Ria de Aveiro lagoon constitutes an activity of great socio-economic relevance. This activity has been growing over the years, being the fishing effort directed towards the common cockle (Cerastoderma edule), the pullet carpet shell clam (Venerupis corrugata), the grooved carpet shell clam (Ruditapes decussatus) and, more...
Poster
Full-text available
The Ria de Aveiro lagoon located in N.W. Portugal is an important area of commercial exploitation of the pullet carpet shell clam Venerupis corrugata (Gmelin, 1791). Nevertheless, catches have decreased considerably in recent years, perhaps due to a combination of overfishing and ecosystem changes (biotic and abiotic factors) which may have affecte...
Poster
Full-text available
The common cockle Cerastoderma edule (Linnaeus, 1785) is the most popular and profitable bivalve fishery resource in the Ria de Aveiro lagoon and plays an important cultural and economic role in the local fisher communities. In 2016, the common cockle was the most exploited bivalve species in the north trade delegation of Aveiro, representing 76% (...
Article
This study examined temporal distributions of macrobenthic communities in relation to bottom depth and specifically addressed whether variation in sedimentary dynamics affects species composition and functional structure. Sampling was carried in 2014 (February, May and September) off Tavira Island (southern Portugal). In each sampling period, three...
Presentation
Full-text available
In this presentation it is pointed out the social, economic, cultural and environmental importance of small-scale fisheries (including harvesting) in Portugal and how information can be obtained. Based on several case studies carried by IPMA, it is emphasized the importance of undertake cooperative research and the methodologies that have been adop...
Article
In the current work we propose a new method to sample surface sediment during bivalve fishing surveys. Fishing institutes all around the word carry out regular surveys with the aim of monitoring the stocks of commercial species. These surveys comprise often more than one hundred of sampling stations and cover large geographical areas. Although supe...
Poster
Full-text available
Four Donax species, D. semistriatus, D. trunculus, D. variegatus and D. vittatus, are common along the European coast, and live simpatrically in some areas (e.g. Iberian Peninsula) . D. trunculus is commercially exploited in several European counties, and constitutes an important shellfish resource due to its high economical value. However, some D....
Article
The main objectives of this study were (i) to provide an updated age-length key for D. trunculus from Atlantic waters, and (ii) to evaluate population dynamics, the timing of recruitment and production parameters of the wedge clam Donax trunculus in two moderately exposed sandy beaches (the protected area of Doñana National Park and the tourist des...
Article
The present study aimed to describe the reproductive cycle and estimate the size at sexual maturity of the Manila clam ( Ruditapes philippinarum ) in the Tagus Estuary (Portugal). Specimens were collected monthly from September 2013 to December 2015 during fishing surveys using bivalve dredges. The gametogenic cycle was described in detail using go...
Article
In this study, the genetic diversity of Donax vittatus across the Iberian Peninsula was investigated using four mitochondrial (COI, Cytb, 16S F and M types) and three nuclear (H3, 18S and 28S) genes. These same molecular markers were also sequenced in D. semistriatus and D variegatus to address the phylogenetic relationships of the species of the g...
Article
Full-text available
The Manila clam Ruditapes philippinarum (Adams & Reeve, 1850) was introduced in several regions worldwide where it is permanently established. In Portuguese waters, the colonisation of the Tagus Estuary by this invasive species coincided with a significant decrease in abundance of the native Ruditapes decussatus (Linnaeus, 1758). This study aimed t...
Article
Full-text available
The present study assessed the influence of sex, size and reproductive status on the meat yield (soft tissues proportion) of the purple dye murex (Bolinus brandaris) from the Ria Formosa lagoon (southern Portugal). During one year of monthly sampling (October 2008 September 2009), average meat yield of B. brandaris was 40.5±6.1% (range: 25.8-56.1%...
Article
The present study characterised the socio-economic, operational and technical aspects of harvesting the gooseneck barnacle (Pollicipes pollicipes) along the southwestern coast of Portugal. For this purpose, face-to-face interviews were conducted with commercial harvesters of the two most representative fishery associations (covering 51% licensed ha...
Article
The present study reports the first record of the Monrovia doctorfish, Acanthurus monroviae (Steindachner, 1876) in the Algarve coast (southern Portugal). A female (257 mm TL) was caught 21 April 2016 off the beach of Olhos d’Água by a small-scale fishing boat operating bottom-set gill nets at approximately 15 m depth. Morphometric and meristic par...
Article
The biology, ecology and distribution of Pennant's swimming crab (Portumnus latipes) along the coast of Portugal in 2015 was studied. Females dominated the catches and the highest percentage of berried females was recorded between February and April. Mean fecundity values were 7711, 10 004 and 4838 eggs for development stages I, II and III, respect...
Article
Full-text available
The present study analysed the megabenthic diversity in subtidal soft bottoms and assessed the main environmental drivers of megabenthic community organisation along the Algarve coast (southern Portugal). We tested the hypothesis that megabenthic communities respond to the same environmental drivers than macrofauna. We found that similar to macrofa...
Article
This study reports the morphometric relationships and relative growth of 20 uncommon bivalve species collected along the Algarve coast (southern Portugal). Morphometric relationships were established between three linear variables (shell length, height and width) and one ponderal variable (total weight) and the relative growth between variables (is...
Article
The present study assessed the metal genotoxicity potential at chromosome-level in the bivalve Ruditapes philippinarum collected along different areas of the Tagus estuary. Higher levels of aneuploidy on gill cells were detected at the most sediment contaminated area both in May (31.7%) and October (36.0%) when compared to a less contaminated area...
Article
Full-text available
The reproductive cycle of Acanthocardia tuberculata (Linnaeus, 1758) was studied in M’diq Bay. The gonadal development was determined by means of standard histological techniques, mean oocyte diameters and a condition index. Rough cockle is a gonochoric species with synchronous gonadal development and spawning in males and females. The sex ratio ob...
Article
Venerupis corrugata is commercially exploited in Europe. Over-fishing and recruitment failure is causing the decline of its populations and stock sustainability. Knowledge of this species reproduction is paramount to establish hatchery production of juveniles for restoring natural beds. This work aimed to find a relationship between broodstock cond...
Conference Paper
Full-text available
The EU-FP7 funded project SAFI ("Supporting our Aquaculture and Fisheries Industries", www.safiservices.eu) is primary focused on the exploitation of Earth Observation (EO) data resources, is specifically targeting the support of fisheries and aquaculture industries in our ocean and near-shore areas. The initiative aims at providing information ass...
Article
It is widely recognized that skippers can have a significant role in their vessel performance levels. However, in many studies that seek to address differences in performance of vessels, the contribution of the skipper is often not quantified, or the influencing factors are not explained. This study examines the effect of social factors, such as fa...
Data
The present study analysed the megabenthic diversity in subtidal soft bottoms and assessed the main environmental drivers of megabenthic community organisation along the Algarve coast (southern Portugal). We tested the hypothesis that megabenthic communities respond to the same environmental drivers than macrofauna. We found that similar to macrofa...
Chapter
Full-text available
The exploitation of bivalve mollusks in the Tagus estuary has always been an activity of major socioeconomic importance. Different species were harvested over the years, such as the oyster (Crassostrea spp.), the peppery furrow shell (Scrobicularia plana), cockles (Cerastoderma spp.) and the grooved carpet shell (Ruditapes decussatus), in the inter...
Article
This study reports relative growth, shell length-age keys and growth performance indices (overall growth performance (OGP) and phi prime) for the striped venus Chame-lea gallina from the Huelva coast in southwest (SW) Spain. The morphometric relationship shell height (SH)/shell length (SL) presented isometric growth whereas SL/shell width (SW) and...
Article
Recently an action plan has been put in place off southeastern Portugal, consisting in an offshore aquaculture area off the Armona sandy barrier island, Armona Pilot Production Aquaculture Area (APPAA). The infrastructure was created after the initiative of the Portuguese Government aiming to stimulate local employment opportunities related to seaf...
Article
The present study reports morphometric relationships and discusses the relative growth in the banded murex ( Hexaplex trunculus ) and the purple dye murex ( Bolinus brandaris ) from the Ria Formosa lagoon (southern Portugal). A total of 11 morphometric parameters (eight linear variables: shell length, shell width, total aperture length, aperture le...