13 documents found, page 1 of 2
Behavioural dynamics and decision-making of cognitively-developed invertebrates...
Sampaio, EduardoA totalidade das interações sociais e contextos, tanto com indivíduos relacionados como não- relacionados (incluindo heteroespecíficos), funcionam como fontes críticas de pressão selectiva sobre um organismo e são considerados factor-chave para explicar a evolução da fauna existente. No entanto, há uma grande lacuna de conhecimento sobre como a informação social pode moldar os processos de tomada de decisão e a...
Impaired antioxidant defenses and DNA damage in the European glass eel (Anguill...
Lopes, Ana Rita; Figueiredo, Cátia; Sampaio, Eduardo; Diniz, Mário; Rosa, Rui; Grilo, Tiago F.The European eel (Anguilla anguilla) has attracted scientific inquiry for centuries due to its singular biological traits. Within the European Union, glass eel fisheries have declined sharply since 1980, from up to 2000 t (t) to 62.2 t in 2018, placing wild populations under higher risk of extinction. Among the major causes of glass eels collapse, climate change has become a growing worldwide issue, specificall...
Impacts of hypoxic events surpass those of future ocean warming and acidification
Sampaio, Eduardo; Santos, Catarina; Rosa, Inês C.; Ferreira, Verónica; Pörtner, Hans-Otto; Duarte, Carlos M.; Levin, Lisa A.; Rosa, RuiOver the past decades, three major challenges to marine life have emerged as a consequence of anthropogenic emissions: ocean warming, acidification and oxygen loss. While most experimental research has targeted the first two stressors, the last remains comparatively neglected. Here, we implemented sequential hierarchical mixed-model meta-analyses (721 control–treatment comparisons) to compare the impacts of oxy...
Hypercapnia-induced disruption of long-distance mate-detection and reduction of...
Borges, Francisco; Sampaio, Eduardo; Figueiredo, Cátia; Rosa, Rui; F. Grilo, TiagoOcean acidification (OA) has been shown to disrupt behavioural responses either by affecting metabolic processes, or by effectively impairing an organisms' ability to gather and assess information and make decisions. Given the lack of information regarding the effects of high CO2 on olfactory-mediated mating behaviours in crustaceans, the possible chemosensory disruption in male mate-tracking in the keystone am...
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...
Transgenerational deleterious effects of ocean acidification on the reproductiv...
Borges, Francisco; Figueiredo, Cátia; Sampaio, Eduardo; Rosa, Rui; F. Grilo, TiagoOcean acidification (OA) poses a global threat to marine biodiversity. Notwithstanding, marine organisms may maintain their performance under future OA conditions, either through acclimation or evolutionary adaptation. Surprisingly, the transgenerational effects of high CO2 exposure in crustaceans are still poorly understood. For the first time, the present study investigated the transgenerational effect of OA,...
Absence of cellular damage in tropical newly hatched sharks (Chiloscyllium plag...
Lopes, Ana Rita; Sampaio, Eduardo; Santos, Catarina; Couto, Ana; Pegado, Maria Rita; Diniz, Mário S.; Munday, Philip L.; Rummer, Jodie L.; Rosa, RuiSharks have maintained a key role in marine food webs for 400 million years and across varying physicochemical contexts, suggesting plasticity to environmental change. In this study, we investigated the biochemical effects of ocean acidification (OA) levels predicted for 2100 (pCO2 ~ 900 μatm) on newly hatched tropical whitespotted bamboo sharks (Chiloscyllium plagiosum). Specifically, we measured lipid, protei...
Sex differences in oxidative stress responses of tropical topshells (Trochus hi...
F. Grilo, Tiago; Lopes, Ana Rita; Sampaio, Eduardo; Rosa, Rui; Cardoso, Patrícia G.Given scarcity of knowledge on gender ecophysiological responses of tropical marine organisms to global climate change, the major aim of this research was to investigate potential sex differences in oxidative status of topshell Trochus histrio, after a combined exposure to increased temperature and pCO2. Lipid peroxidation, heat-shock response and antioxidant enzymatic activities were evaluated. Lipid peroxidat...
Smooth hammerhead sharks (Sphyrna zygaena) observed off the Portuguese southern...
Couto, Ana; Queiroz, Nuno; Ketchum, James T.; Sampaio, Eduardo; Furtado, Miguel; Cid, André A.; Castro, Joana; Rosa, RuiDespite its worldwide distribution and vulnerable status, knowledge on the biology and ecology of the smooth hammerhead Sphyrna zygaena in the temperate NE Atlantic is very scarce. Here, we reveal intra-annual fluctuations in S. zygaena abundance in the Portuguese southwestern coast, using sightings data collected on board whale watching boats over five years (2010–14; excluding winter months). Moreover, we inv...
Deficit in digestive capabilities of bamboo shark early stages under climate ch...
Rosa, Rui; Pimentel, Marta; Galan, Juan; Baptista, Miguel; Lopes, Vanessa M.; Couto, Ana; Guerreiro, Miguel; Sampaio, Eduardo; Castro, JoanaLittle empirical information is currently available on the potential effects of acidification and/or warming in sharks, but none exist about digestive capabilities under such future conditions. Here, we investigated the impact of both acidification (ΔpH = 0.5) and warming (+4; 30 °C) on the digestive enzyme levels of recently hatched tropical bamboo shark (Chiloscyllium punctatum). Thirty days post-hatching, ju...