27 documents found, page 1 of 3
Engaging and legitimizing communities: co-designing a community-based Marine Pr...
Rangel, Mafalda; Costa, Barbara Horta e; Guimarães, Mª Helena; Ressurreição, Adriana; Monteiro, Pedro; Oliveira, Frederico; Bentes, LuísMarine Protected Areas are increasingly used as tools to preserve marine habitats and biodiversity worldwide. Nonetheless, creating MPAs in densely populated multi-use coastal areas comes with intrinsic conflict potential, since protection and economic development are not always hand-in-hand and local users might disagree with the designation of such conservation tools. The use of inclusive and transparent part...
When sardines disappear: tracking common dolphin, delphinus delphis, distributi...
Brouder, Sarah; Marques, Tiago A.; Oliveira, Nuno; Monteiro, Pedro; Gonçalves, Jorge Manuel Santos; Marçalo, AnaThe common dolphin, Delphinus delphis, is the most abundant cetacean species along the western Iberian Peninsula and faces many anthropogenic threats, with bycatch being the most impactful. Its preferred prey, sardine (Sardina pilchardus), has shown fluctuating abundance over the past decade, potentially influencing dolphin distribution. This study provides the first insights into common dolphin distribution al...
Reducing cetacean interactions with bottom set‐nets and purse seining using aco...
Marçalo, Ana; Carvalho, Flávia; Frade, Magda; Bentes, Luis; Monteiro, Pedro; Pontes, João; Ferreira Alexandre, Teresa Sofia; Oliveira, FredericoIn southern Iberia (NE Atlantic), cetacean bycatch is reported in several fisheries, whereas depredation by bottlenose dolphin (Tursiops truncatus) is commonly observed in bottom set-net fisheries. This study tested the effectiveness of acoustic deterrent devices in discouraging small cetaceans from approaching bottom set-nets and purse seine to reduce interactions. The acoustic deterrent devices used in the st...
Engaging and legitimizing communities: co-designing a community-based marine pr...
Rangel, Mafalda; Horta e Costa, Barbara; Guimarães, Mª Helena; Ressurreição, Adriana; Monteiro, Pedro; Oliveira, Frederico; Bentes, LuisMarine Protected Areas are increasingly used as tools to preserve marine habitats and biodiversity worldwide. Nonetheless, creating MPAs in densely populated multi-use coastal areas comes with intrinsic conflict potential, since protection and economic development are not always hand-in-hand and local users might disagree with the designation of such conservation tools. The use of inclusive and transparent part...
Circannual prevalence of tetrodotoxins in trumpet shells: sea stars as a possib...
Pais, Maria; Carvalho, Flávia; Frade, Magda; Reis Costa, Pedro; Silva, José Paulo da; Marçalo, Ana; Canario, Adelino; Lage, SandraTetrodotoxin (TTX) is a potent neurotoxin, first identified in fish from the Tetraodontidae family but also detected in marine invertebrates. A Human poisoning episode after consumption of trumpet shell Charonia lampas, likely caught off the Portuguese mainland southern coast - Algarve, together with the increasing reports of TTX in European waters, led the European Food Safety Authority (EFSA) to recommend max...
Seasonal variation in seabird abundance and bycatch at artisanal bottom-set net...
Pereira, Jorge M.; Ramos, Jaime A.; Almeida, Ana; Marçalo, Ana; Carvalho, Flávia; Fagundes, Isabel; Gonçalves, Jorge Manuel Santos; Frade, MagdaBycatch is a major cause of seabird mortality, yet most studies focus on industrial fisheries, with limited knowledge on artisanal fisheries. This study investigates the seasonal abundance of seabirds off the southern-eastern coast of mainland Portugal, their attendance at artisanal bottom-set net fisheries, and observed bycatch, using onboard observations and fishermen interviews. From March 2020 to November 2...
Mitigation measures to reduce seabird's interactions with bottom-set nets in so...
Frade, Magda; Carvalho, Flávia; Samel, Vighnesh Nilesh; Oliveira, Nuno; Andrade, Joana; Gonçalves, Jorge Manuel Santos; Marçalo, AnaBycatch poses a significant threat to seabird populations globally. On the southern coast of mainland Portugal, mitigation measures were tested to reduce seabird interactions with fishing vessels. Between 2021 and 2023, this study evaluated the effectiveness of a visual deterrent (a ’scarybird’ device), an acoustic deterrent (megaphone broadcasts), alongside modification in fisher’s behaviour discard management...
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...
Evaluating dolphin interactions with bottom-set net fisheries off Southern Iber...
Vighnesh Samel; Flávia Carvalho; Magda Frade; Marçalo, Ana; Erzini, Karim; Gonçalves, Jorge Manuel SantosThe present study, covering 2018-2022, evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve), estimating bycatch, depredation, gear damage and net length influence on Landing per Unit Effort (LPUE). The fishery employed various m & eacute;tiers (gillnets - mesh sizes: < 60, 60-75, 80 and 220 mm; trammel nets - 120 inner and 640 mm outer panels)....
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...