15 documents found, page 1 of 2
New evidence of alternative migration patterns for two Mediterranean potamodrom...
Rato, Ana; Alexandre, Carlos Manuel; Pedro, Sílvia; Mateus, Catarina; Pereira, Esmeralda; Belo, Ana Filipa; Quintella, BernardoIberian barbel (Luciobarbus bocagei Steindachner, 1864) and Iberian nase (Pseudochondrostoma polylepis Steindachner, 1864) are two Mediterranean potamodromous fish species known to perform annual upstream migrations to reach spring spawning grounds. In the Mondego River basin, at the Coimbra dam, migratory movement patterns and individual size structure were assessed through a video recording monitoring system ...
Investimento na promoção e sustentabilidade dos recursos piscícolas da região C...
Alexandre, Carlos Manuel; Silva, Sara; Rato, Ana; Almeida, Pedro RaposoCom o objetivo de resolver alguns dos problemas identificados e desenvolver avanços técnicos e científicos que permitam otimizar o sucesso destas ações de repovoamento, foi, em 2018, dado início ao projeto “CRER - Adaptação do Posto Aquícola de Campelo para a Criação Experimental de Trutas Assilvestradas”, uma operação cofinanciada por Fundos Europeus (FEAPM - Fundo Europeu dos Assuntos Marítimos e das Pescas),...
Migration Patterns and Behaviour of Trout (Salmo trutta L.) in the Southern Lim...
Silva, Sara; Alexandre, Carlos; Ribeiro, Ana; Domingues, Andreia; Rato, Ana; Joana, Pereira; Mateus, Catarina; Quintella, Bernardo; Almeida, PedroThe trout Salmo trutta L. is an iconic fish species very well studied across most of its range. However, there is a lack of information about the biology and ecology of S. trutta populations from southern European rivers, which coincide with the southern limit of its global distribution. This study aims to analyse the movement patterns and habitat use of S. trutta in the Mondego River basin, Central Portugal, a...
Utilização da espectroscopia NIR para a avaliação da qualidade em frutos secos-...
Rato, Ana; Mendes, Maria Beatriz; Farinha, Daniela; Peixe, Augusto; Dias, António; Barroso, João MotaA aplicação da espectroscopia FT-NIR aos frutos permite fazer uma avaliação rápida, com base na análise de um espectro de infravermelho, de vários parâmetros da qualidade podendo aplicar-se às linhas de escolha e embalagem. No sector dos frutos secos as técnicas utilizadas atualmente para a avaliação da qualidade recorrem a diferentes processos, geralmente aplicados em sequência durante o processo de escolha e ...
What do oysters smell? Electrophysiological evidence that the bivalve osphradiu...
Rato, Ana; Joaquim, Sandra; Matias, Domitília; Hubbard, PeterThe sensing of chemical cues is essential for several aspects of bivalve biology, such as the detection of food and pheromones. However, little is known about chemical communication systems in bivalves or the possible role of the osphradium as a chemosensory organ. To address this, we adapted an electrophysiological technique extensively used in vertebrates & mdash;the electro-olfactogram & mdash;to record from...
Temporal patterns of the catadromous thinlip grey mullet migration in freshwater
Pereira, Esmeralda; Quintella, Bernardo R.; Lança, Maria João; Alexandre, Carlos M.; Mateus, Catarina S.; Pedro, Sílvia; Belo, Ana Filipa; Rato, AnaThe thinlip grey mullet (Chelon ramada Risso, 1827) is a catadromous fish that performs massive migrations to freshwater habitats for feeding purposes that can assume a structuring role on riverine ecology due to the biomass involved in these movements. Seasonal movements of thinlip grey mullet through a vertical slot fish pass located in River Mondego (Portugal) were continuously monitored between 2013 and 201...
Effects of hydropeaking on the behaviour, fine-scale movements and habitat sele...
Rato, Ana; Alexandre, Carlos M.; Almeida, Pedro R.; Costa, José L.; Quintella, BernardoHydropeaking is widely known for changing the quantity and quality of the available habitat downstream of hydroelectric facilities, thus affecting all stages of fish life cycles. Hydropeaking impacts on salmonids are widely studied, but knowledge of its effects on cyprinids, which are dominant in Mediterranean areas, is scarce. In this study, 11 Iberian barbel (Luciobarbus bocagei, Steindachner 1864) were tagge...
The impact of climate Change on bivalve farming: combined effect of temperature...
Rato, Ana; Joaquim, Sandra; Matias, Ana Margarete; Roque, Cláudia; Marques, António; Matias, DomitíliaEuropean clam (Ruditapes decussatus) is one of the most relevant emergent bivalve species from the aquaculture sector in Europe with high economic value. Climate changes represent a potential limiting factor to this activity, directly interfering with the survival and behavior of bivalves. Severe fluctuations in temperature along with periods of heavy rainfall or periods of drought that significantly change the...
Elemental composition and bioaccessibility of farmed oysters (Crassostrea gigas...
Cardoso, Carlos; Gomes, Romina; Rato, Ana; Joaquim, Sandra; Machado, Jorge; Gonçalves, José Fernando; Vaz‐Pires, Paulo; Magnoni, LeonardoThe Pacific oyster (Crassostrea gigas) culture has been expanding, thereby leading to a greater importance of hatcheries. Broodstock conditioning is very important in the hatchery process, in which diet composition may have a strong influence on the offspring production and quality. Therefore, the current study evaluated elemental composition and bioaccessibility of oysters fed different ratios of dietary seawe...
Chemical diplomacy in male tilapia: urinary signal increases sex hormone and de...
Saraiva, João; Keller-Costa, Tina; Hubbard, Peter; Rato, Ana; Canario, AdelinoAndrogens, namely 11-ketotestosterone (11KT), have a central role in male fish reproductive physiology and are thought to be involved in both aggression and social signalling. Aggressive encounters occur frequently in social species, and fights may cause energy depletion, injury and loss of social status. Signalling for social dominance and fighting ability in an agonistic context can minimize these costs. Here...