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Impacts of deoxygenation and hypoxia on shark embryos anti-predator behavior an...
Varela, Jaquelino; Martins Rebocho, Sandra; Court, Melanie; Santos, Catarina Pereira; Paula, José Ricardo; Ferreira, Inês João; Diniz, MárioSimple Summary Despite their importance, sharks are among the most endangered ocean species. In addition to overexploitation and the destruction of their natural habitat, climate change is also known to pose a serious threat to them. Among the physico-chemical changes associated with climate change, oxygen loss has been the least studied in terms of its effect on shark physiology and behavior. In this study, we...
Cleaning stations in a changing ocean : Bio-ecological responses of cleaning mu...
Paula, José RicardoAs simbioses entre espécies representam adaptações face a mudanças ambientais no meio marinho. Uma das simbioses mais carismáticas é o mutualismo entre peixes limpadores e os seus clientes. Estes ocupam territórios específicos conhecidos como “estações de limpeza” e prestam um serviço aos seus clientes, comendo ectoparasitas e tecidos mortos. Para interagir com os seus clientes os bodiões limpadores (Labroides ...
Distinct Bleaching Resilience of Photosynthetic Plastid-Bearing Mollusks Under ...
Dionísio, Gisela; Faleiro, Filipa; Bispo, Regina; Lopes, Ana Rita; Cruz, Sónia; Paula, José Ricardo; Repolho, Tiago; Calado, Ricardo; Rosa, RuiThe impact of temperature on photo-symbiotic relationships has been highly studied in the tropical reef-forming corals but overlooked in less charismatic groups such as solar-powered sacoglossan sea slugs. These organisms display one of the most puzzling symbiotic features observed in the animal kingdom, i.e., their mollusk-plastid association, which enables them to retain photosynthetic active chloroplasts (i....
Effects of acute waterborne exposure to harmful algal toxin domoic acid on fora...
Mincarelli, Luana Fiorella; Paula, José Ricardo; Pousão-Ferreira, Pedro; Rosa, Rui; Costa, Pedro ReisDomoic acid (DA) is a neurotoxin naturally produced by Pseudo-nitzschia diatoms that may be transferred through the marine food web and cause mass mortality events at higher trophic levels. Yet, the effects of the dissolved marine toxin on foraging responses and swimming performances of fish early stages are poorly known. Here we evaluated the effects of short-term exposure (24 h) to a single dose of domoic aci...
Ocean acidification dampens physiological stress response to warming and contam...
Sampaio, Eduardo; Lopes, Ana Rita; Francisco, Sofia; Paula, José Ricardo; Pimentel, Marta; Luísa Maulvault, Ana; Repolho, Tiago; F. Grilo, TiagoIncreases in carbon dioxide (CO2) and other greenhouse gases emissions are changing ocean temperature and carbonate chemistry (warming and acidification, respectively). Moreover, the simultaneous occurrence of highly toxic and persistent contaminants, such as methylmercury, will play a key role in further shaping the ecophysiology of marine organisms. Despite recent studies reporting mostly additive interaction...
Differential behavioural responses to venlafaxine exposure route, warming and a...
Luísa Maulvault, Ana; Santos, Lúcia H.M.L.M.; Paula, José Ricardo; Camacho, Carolina; Pissarra, Vasco; Fogaça, Fabiola; Barbosa, Vera; Alves, RicardoAntidepressants, such as venlafaxine (VFX), which are considered emerging environmental pollutants, are increasingly more present in the marine environment, and recent evidence suggest that they might have adverse effects on fish behaviour. Furthermore, altered environmental conditions associated to climate change (e.g. warming and acidification) can also have a determinant role on fish behaviour, fitness and s...
Seagrass ecophysiological performance under ocean warming and acidification
Repolho, Tiago; Duarte, Bernardo; Dionísio, Gisela; Paula, José Ricardo; Lopes, Ana Rita; Rosa, Inês; F. Grilo, Tiago; Caçador, Isabel; Calado, RicardoSeagrasses play an essential ecological role within coastal habitats and their worldwide population decline has been linked to different types of anthropogenic forces. We investigated, for the first time, the combined effects of future ocean warming and acidification on fundamental biological processes of Zostera noltii, including shoot density, leaf coloration, photophysiology (electron transport rate, ETR; ma...
Deep-sea seven-arm octopus hijacks jellyfish in shallow waters
Rosa, Rui; Kelly, Jesse T.; Lopes, Vanessa M.; Paula, José Ricardo; Gonçalves, João; Calado, Ricardo; Norman, Mark D.; Barreiros, João P.Pelagic octopods have secondarily left the seafloor and evolved a holopelagic existence. One of the most striking adaptations among a suite of related pelagic octopod families (superfamily Argonautoidea) is their associations with gelatinous zooplankton (jellyfishes and salps). Here, we report a unique interaction between a male octopod (Haliphron atlanticus) and a jellyfish (Pelagia noctiluca) at the sea surfa...
“Gone with the wind”: Fatty acid biomarkers and chemotaxonomy of stranded pleus...
Lopes, Ana Rita; Baptista, Miguel; Rosa, Inês; Dionísio, Gisela; Gomes-Pereira, José; Paula, José Ricardo; Figueiredo, Cátia; Bandarra, NarcisaMarine pleustonic species such as the hydrozoans Velella velella and Physalia physalis, are known to drift in the world's oceans driven by winds, currents and tides. Here we present the first chemotaxonomic characterization, based on the fatty acid (FA) profile, of these two charismatic oceanic species that thrive in the interface layer between air and the water column in adult stages. Moreover, we compared the...
Neuro-oxidative damage and aerobic potential loss of sharks under elevated CO2 ...
Rosa, Rui; Paula, José Ricardo; Sampaio, Eduardo; Pimentel, Marta; Lopes, Ana Rita; Baptista, Miguel; Guerreiro, Miguel; Santos, Catarina; Campos, DerekSharks occupy high trophic levels in marine habitats and play a key role in the structure and function of marine communities. Their populations have been declining worldwide by ≥90 %, and their adaptive potential to future ocean conditions is believed to be limiting. Here we experimentally exposed recently hatched bamboo shark (Chiloscyllium punctatum) to the combined effects of tropical ocean warming (+4; 30 °...