First Record of Cetacean Killed in an Artisanal Fish Aggregating Device in the Mediterranean Sea.

Fish Aggregating Devices (FADs) are anchored floating structures often made with cheap scrapped materials and used to aggregate pelagic fish species under their artificial shadows. Globally, the dangerous impact of FADs is well known. They pose a severe threat as a source of bycatch, as a danger to navigation, and with their high potential to become marine litter. Unintended entanglement and consequent mortality in FADs of vulnerable (e.g., sharks, sea turtles, and cetaceans) and commercial species is a serious concern for several international inter-governmental bodies (e.g., EU, GFCM, and IWC). This work describes the first case of a cetacean, a striped dolphin (Stenella coeruleoalba), entangled in a FAD in the Mediterranean Sea. A young male of striped dolphins was found dead along the coast of Lazio (central Tyrrhenian Sea) with its peduncle entangled in typical debris from illegal/artisanal FADs (i.e., a nylon rope, teared gardening plastic sheets, bush branches, and scrapped empty plastic bottles). Although this is the first confirmed case of a cetacean entangled in a FAD in Mediterranean waters, given the extent of the deployment of anchored FADs, the scale of this type of interaction with protected species might be seriously underestimated. Therefore, actions and monitoring need to be implemented urgently to effectively protect and conserve marine biodiversity.

Exploratory study on the endogenous ouabain in idiopathic pulmonary arterial hypertension patients.

INTRODUCTION: Endogenous ouabain (EO) is a steroid hormone secreted by the adrenal glands associated with adverse cardiovascular outcomes. However, EO plays other roles as brain protection against traumatic injury and seems involved in the adaptive response to hypoxia. Recently, we detected, for the first time, EO in a healthy human group of acute hypoxia and diving animals. METHODS: This study complements the above as we considered a human model of chronic hypoxia. The aim is to detect EO in five idiopathic pulmonary arterial hypertension patients. RESULTS AND DISCUSSION: We found that these patients had higher plasma concentrations of EO than control subjects. In addition, EO plasma concentrations were negatively correlated with the mean pulmonary arterial pressure and total pulmonary vascular resistance. The results could suggest that high concentrations of EO are predictive of better adaptation of the right ventricular afterload. CONCLUSION: Although the results are preliminary, they can represent a helpful hint for future investigations for possible therapeutic and diagnostic approaches.

Fin Whale (Balaenoptera physalus) Mortality along the Italian Coast between 1624 and 2021.

The Mediterranean Sea hosts a population of fin whale (Balaenoptera physalus), the only species of Mysticete regularly occurring in the basin. Observed and inferred mortality suggests that the population is likely declining. Accordingly, understanding the causes of mortality and assessing the health status is pivotal to the survival of this endangered population. While such studies are inherently difficult for a highly roaming species with a pelagic distribution, mortality events provide the opportunity to investigate biological and epidemiological traits linked to these events, and evaluate the footprint of human activity, especially when long-term data series exist. We present a comprehensive spatial-temporal overview of fin whale mortality events along the Italian coast encompassing four centuries (1624-2021). Time series analysis was used to highlight structural changes in the evolution of mortality through time, while spatial-temporal patterns in the distribution of mortality events were assessed through emerging hot spot analysis methods. Recent mortality events (1964-2021) were further explored to evaluate, where possible, the primary causes of mortality and to identify anthropogenic threats of conservation concerns. This long-term survey offers the basis for an understanding of the health status of this B. physalus population and provides much-needed information for developing an effective management and conservation plan for the species in the region.