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  • Gulls as indicators of environmental changes in the North Atlantic: a long-term study on Berlenga Island, Western Portugal
    Publication . Ceia, Filipe R.; Silva, Nathalie C.; Paiva, Vitor H.; Morais, Lurdes; Serrao, Ester; Ramos, Jaime A.
    In recent decades, the breeding populations of the yellow-legged gull Larus michahellis (YLG) have increased significantly, primarily due to the increase in open refuse dumps and discards from fisheries. Portugal’s largest YLG breeding colony is located on Berlenga Island, where population numbers have been monitored since 1974. The population grew exponentially until 1994, prompting the implementation of population control measures, including culling adult birds and eggs. A long-term data base including number of breeding birds (since 1974), breeding parameters (since 2002), and trophic niches (using stable isotopes since 2011) of YLG breeding on Berlenga was related with oceanographic parameters, fish landings and quantity of urban waste. Trophic ecology showed strong relationships with oceanographic parameters (wNAO, Chl-a, and SST) and fisheries landings (the 10 most frequently consumed species by the YLG, traded at fish auctions in the main fishing harbour nearby). The results indicated significant relationships between reproductive performance and fisheries landings, particularly with demersal species that gulls primarily access through fisheries discards. However, population control measures played a pivotal role in stabilising and even reducing the population, despite sporadic events of poor oceanographic productivity in the past decade having a consistent impact on the reduction in breeding individuals.
    2023-11-18Journal article Open access Show more
  • Perirenal hematoma: a rare complication of anticoagulant therapy
    Publication . Silva, Frederico; Moutinho, Joana; Nascimento, Joana; Vasconcelos, Tiago; Simões, Inês G.
    Hemorrhagic complications arising from anticoagulant use are a well-recognized concern in clinical practice. This case study presents an 84-year-old woman with multiple cardiovascular risk factors, including atrial fibrillation, who developed a perirenal hematoma after just five doses of enoxaparin, prescribed for stroke prevention. The patient exhibited altered mental status and abdominal pain, prompting imaging studies revealing the hematoma. This case highlights the importance of vigilance in patients at risk for bleeding complications, especially in the initial days of anticoagulant therapy. Diagnostic imaging, particularly CT scans or ultrasound, is crucial for early detection. Management strategies range from discontinuing anticoagulants to potential interventions like anticoagulation reversal, angiography, or surgery. The decision to resume anticoagulation presents a challenge and requires a personalized approach based on patient factors. This case underscores the need for continued vigilance, early diagnosis, and evidence-based decisions in managing patients on anticoagulants, emphasizing the necessity for further research to establish clear guidelines in such complex clinical scenarios.
    2023-11-18Journal article Open access Show more