8 documents found, page 1 of 1
Little migrants: assessment of stranded loggerhead turtles (Caretta caretta) so...
Corona, Luana Santos; Galatoulas, Adam; Nicolau, Lídia; Pereira, Andreia F. T.; Sá, Sara F.; Lopes da Cunha, Regina; Marçalo, Ana; Castilho, RitaMaritime activities affect the migratory routes of marine organisms, including loggerhead turtles (Caretta caretta). The coastal waters of mainland Portugal lie along these routes, providing foraging grounds but lacking nesting beaches, making them ideal for studying turtle migration. This study presents the first assessment of the natal origins of loggerheads in the North-East Atlantic. We analysed the genetic...
Assessment of harbour porpoise bycatch along the Portuguese and Galician Coast:...
Torres-Pereira, Andreia; Araújo, Hélder; Monteiro, Silvia Silva; Ferreira, Marisa; Bastos-Santos, Jorge; Sá, Sara; Nicolau, Lídia; Marçalo, AnaThe Iberian harbour porpoise population is small and fisheries bycatch has been described as one of its most important threats. Data on harbour porpoise strandings collected by the Portuguese and Galician stranding networks between 2000 and 2020 are indicative of a recent mortality increase in the western Iberian coast (particularly in northern Portugal). Overall, in Portugal and Galicia, individuals stranded d...
Morphometric relationships, relative growth and roe yield of the sea urchin (Pa...
Nicolau, Lídia; Vasconcelos, Paulo; Machado, Inês; Pereira, Fábio; Moura, Paula; Carvalho, André N.; Gaspar, MiguelSea urchin (Paracentrotus lividus) populations from the northwestern (Carreco) and southwestern (Aljezur) coasts of Portugal were surveyed to analyse and compare their morphometric relationships, relative growth (isometry vs. allometry) and roe yield. Specimens were hand-collected from intertidal rock pools and sampled monthly during two consecutive years (November 2010-November 2012). Overall, 1220 P. lividus ...
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...
Stranding patterns and feeding ecology of striped dolphins, Stenella coeruleoal...
Marçalo, Ana; Giménez, Joan; Nicolau, Lídia; Frois, Jessica; Ferreira, Marisa; Sequeira, Marina; Eira, Catarina; Pierce, Graham J.; Vingada, JoséThe striped dolphin, Stenella coeruleoalba, is one of the most abundant cetacean species off the Western Iberian coast, however, studies on the species regarding biology, ecology, threats or conservation efforts are lacking. This study investigates stranding patterns (years 1981–2014) and diet (2002–2014) of striped dolphins (Stenella coeruleoalba) off the Portuguese mainland coast. Stranded animals were sample...
Trace elements in loggerhead turtles (Caretta caretta) stranded in mainland Por...
Nicolau, Lídia; Monteiro, Sílvia S.; Pereira, Andreia T.; Marçalo, Ana; Ferreira, Marisa; Torres, Jordi; Vingada, José V.; Eira, CatarinaPollution is among the most significant threats that endanger sea turtles worldwide. Waters off the Portuguese mainland are acknowledged as important feeding grounds for juvenile loggerheads. However, there is no data on trace element concentrations in marine turtles occurring in these waters. We present the first assessment of trace element concentrations in loggerhead turtles (Caretta caretta) occurring off t...
Diet of bottlenose dolphins (Tursiops truncatus) from the Gulf of Cadiz: Insigh...
Giménez, Joan; Marçalo, Ana; Ramírez, Francisco; Verborgh, Philippe; Gauffier, Pauline; Esteban, Ruth; Nicolau, Lídia; González-Ortegón, EnriqueThe ecological role of species can vary among populations depending on local and regional differences in diet. This is particularly true for top predators such as the bottlenose dolphin (Tursiops truncatus), which exhibits a highly varied diet throughout its distribution range. Local dietary assessments are therefore critical to fully understand the role of this species within marine ecosystems, as well as its ...
Biotransformation modulation and genotoxicity in white seabream upon exposure t...
Costa, Pedro Reis; Pereira, Patrícia; Guilherme, Sofia; Barata, Marisa; Nicolau, Lídia; Santos, Maria Ana; Pacheco, Mário; Pousão-Ferreira, PedroFish are recurrently exposed to paralytic shellfish toxins (PSTs) produced by Gymnodinium catenatum. Nevertheless, the knowledge regarding metabolism of PSTs and their toxic effects in fish is scarce. Consequently, the current study aims to investigate the role of phase I and II detoxification enzymes on PST metabolism in the liver of white seabream (Diplodus sargus), assessing ethoxyresorufin-O-deethylase (ERO...