26 documents found, page 1 of 3
Recreational harvesting of the wedge clam (Donax trunculus) in southern Portuga...
Sordo, Laura; Vasconcelos, Paulo; Piló, David; Carvalho, André N.; Pereira, Fábio; Gaspar, MiguelThis study was the first attempt to characterize the recreational harvesting of the wedge clam (Donax trunculus). For this purpose, 403 face-to-face interviews were performed in the summers of 2018 and 2019 in southern Portugal. The majority of the harvesters frequented the selected beaches during holidays and collected wedge clams as a hobby for an appetizer. The respondents reported an inter-annual variation ...
Occurrence, infestation rate, and spatiotemporal distribution of the African pe...
Santos, Agatha C. N.; Vasconcelos, Paulo; Pereira, Fábio; Piló, David; Carvalho, André N.; Gaspar, MiguelThe present study aimed to analyze the occurrence and prevalence, infestation rate and intensity, host-guest colonization pattern, morphometric relationships, and spatiotemporal distribution of the African pea crab (Afropinnotheres monodi) inhabiting the shell of Mediterranean mussels (Mytilus galloprovincialis) from the Algarve coast and Ria Formosa lagoon (southern Portugal). Sampling campaigns were performed...
Hand dredging for the wedge clam (Donax trunculus) in the Algarve coast (southe...
Nicolau, Lídia; Vasconcelos, Paulo; Carvalho, André N.; Pereira, Fábio; Piló, David; SORDO, LAURA; Gaspar, MiguelThis 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 Portugal). Overall, were caught 12,319 individuals (3985 in Lota B...
Are non-indigenous species hitchhiking offshore farmed mussels? A biogeographic...
Piló, David; Pereira, F.; Carvalho, A.N.; Vasconcelos, P.; Cunha, A.M.; Gaspar, MiguelThe 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 biogeographic dissimilarities between the mussel farm area and the Grea...
A multimetric approach to evaluate offshore mussel aquaculture effects on the t...
Lacson, A. Z.; Piló, David; Pereira, F.; Carvalho, A. N.; Curdia, J.; Caetano, M.; Drago, T.; Santos, M. N.; Gaspar, MiguelA 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 macrobenthic samples collected before (April and September 2010) and after...
Tanaidaceans (Crustacea: Peracarida: Apseudidae) from southern Portugal with de...
Carvalho, Andre N.; Pereira, Fabio; Piló, David; Gaspar, Miguel; Esquete, PatriciaThis 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). The total length of the studied population ranged from 2.2 to...
Evaluation of macrobenthic community responses to dredging through a multimetri...
Piló, David; Carvalho, A. N.; Pereira, F.; Coelho, H. E.; Gaspar, MiguelMacrobenthic 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 ecological indicators (number of species and abundance), the beta diversit...
Are submarine groundwater discharges affecting the structure and physiological ...
Piló, David; Barbosa, Ana B.; Teodosio, Maria; Encarnação, J.; Miguel de Sousa Leitão, Francisco; Range, Pedro; Krug, Lilian; Cruz, J.; Chícharo, LuísThis study evaluated the impacts of submarine groundwater discharges (SGD) on a rocky intertidal community of South Portugal, during April-November 2011. Chlorophyll-a concentration was higher at the SGD site in respect to the Reference site. Epibenthic community structure differed between sites, with an increase in Chthamalus spp. and a decrease in macroalgae coverage at the SGD site. The abundance and body si...
Is metal contamination responsible for increasing aneuploidy levels in the Mani...
Piló, David; Carvalho, S.; Pereira, P.; Gaspar, Miguel; Leitao, A.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 over the same periods (203% and 29.0% respectively). Interesting...
How functional traits of estuarine macrobenthic assemblages respond to metal co...
Piló, David; Ben-Hamadou, Radhouan; Pereira, F.; Carrico, A.; Pereira, P.; Corzo, A.; Gaspar, Miguel; Carvalho, S.The effects of metal contamination on estuarine macrobenthic communities were investigated using the Biological Traits Analysis (BTA). The study was carried out in the Tagus estuary (western Portugal). Samples of macrobenthic communities and associated environmental variables were taken in four surveys (September 2012, and February, May and October 2013) across the contamination gradient from three main zones: ...