MARE - Artigos em revistas internacionais
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Browsing MARE - Artigos em revistas internacionais by Field of Science and Technology (FOS) "Ciências Naturais"
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- Brucella ceti in Common Dolphins (Delphinus delphis) in Portugal—Characterization of first IsolatesPublication . Cavaco, Sandra; Grilo, Miguel; Dias, Ricardo; Nunes, Mónica; Pascoal, Pedro; Pereira, Marcelo; Fogaça, Catarina; Costa, Ana Beatriz; Pardal, Sofia; Ferreira, Ana CristinaThis study investigates Brucella ceti infection in marine mammals stranded along the Lisbon and Tagus Valley coast between 2022 and mid-2024, marking the first report of Brucella presence in Portuguese waters. Out of 59 examined marine mammals, B. ceti was isolated in three common dolphins (5.1%), a prevalence rate consistent with previous studies from other coastlines. PCR-based detection indicated a higher infection rate (23.7%), suggesting an underestimation of the prevalence of B. ceti infection in this population. Multi-locus Sequence Typing (MLST) and Multiple-Locus Variable-Number Tandem-Repeat Analysis (MLVA) revealed distinct genetic profiles and close relationships to B. ceti strains from the Atlantic, supporting the hypothesis of specific host-adapted lineages in dolphins. Virulence genes, including those for host interaction (bspE, btpB) and intracellular survival (virB7, vceA), were consistent across isolates, highlighting the pathogenic potential. Additionally, antimicrobial resistance (AMR) genes, such as mprF and efflux proteins (bepC-G), were also identified. These findings underscore the need for further research and surveillance to understand B. ceti transmission, host range, and impacts on Atlantic cetaceans, as well as to develop effective diagnostic and management strategies to mitigate infection risks in marine environments.
- Southernmost record of Liparis montagui (Donovan, 1804) (Perciformes, Liparidae) in European waters (central Portugal), with genetic validationPublication . Duarte-Coelho, Pedro; Miranda, Carolina; Pereira, Ana; Vasco-Rodrigues, Nuno; Almada, FredericoIn January 2022, the presence of adult Liparis montagui (Donovan, 1804) was documented at its southernmost point along the west coast of Portugal. The species was identified through both morphological and genetic barcoding analyses. This observation, part of an ongoing long-term coastal survey, suggests that L. montagui may be a transient species, influenced by complex climate and oceanic interactions along the western Iberian coast. This finding stresses the importance of long-term ecological studies and regular field surveys in understanding species distribution and the effects of climate change on marine biodiversity.