Understanding the causes of mortality and contaminant loads of stranded cetacean species in Sardinian waters (Italy) using Bayesian Hierarchical Models

Pennino, María Grazia; Rufener, Marie-Christine; Giménez, Joan; Berlinguer, Fiammetta; Bollo, E.; Appino, Simonetta; Zucca, Daniele; Chessa, Giannina; Rotta, Andrea

doi:10.1016/j.seares.2022.102170

Cited by 4 publications

(1 citation statement)

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“…The depletion of resources forces whales to seek alternative food sources, causing some species to migrate to shallower water areas with greater resource abundance, thereby increasing the stranding risk [94]. In addition, the increased difficulty in procuring sustenance necessitates a greater frequency of foraging, thereby increasing the likelihood of vessel collisions [95]. Bycatch and entanglement continue to pose significant hazards to the survival of cetaceans [96].…”

Section: Correlates Of Strandings Through Timementioning

confidence: 99%

Changing Trends in Cetacean Strandings in the East China Sea: Identifying Relevant Variables and Implications for Conservation and Management

Yang,

Li,

Jin

et al. 2023

Diversity

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The frequency of cetacean strandings is increasing, with multiple causes identified. We examined temporal and spatial trends in stranding numbers along the coastal areas of the East China Sea from 1990 to 2021. Using structural equation models, we analyzed the relationships between strandings and climate, oceanic properties, and human activities. Our findings revealed time-dependent interannual variability in strandings but no linear trend, indicating relative stability in cetacean strandings. Seasonal patterns were observed only in narrow-ridged finless porpoises (Neophocaena asiaeorientalis), with significant spring increases (March to May). Clustering of strandings occurred in central Fujian and northern/southern Taiwan, according to spatial analysis. The impact of variables on cetacean strandings varied across time periods. Storm surges, coastal fishing, and the Pacific decadal oscillation were associated with stranding events from 1990 to 2006. However, from 2006 to 2021, the influence of storm surges weakened, while the climate index only indirectly affected strandings through sea surface temperature and salinity, with an increased intensity in the effects of winter sea surface temperature and salinity. Structural equation models unveiled the cascading effects of environmental changes on strandings. This study reports changing trends in cetacean strandings and identifies relevant variables. Although not exhaustive, understanding the reasons behind strandings enhances our comprehension of cetacean responses to environmental changes, supporting targeted conservation and management efforts.

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Section: Correlates Of Strandings Through Timementioning

confidence: 99%