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- Unveiling patterns in cetacean strandings along southern atlantic iberia: temporal and spatial trends, seasonality, and causes of deathPublication . Hofman, Jan; Crawford, Sarah; Fialho, Ana; Casero, Maria; Pontes, João; Conceição Alves da Silva, Ana Maria; Nicolau, Lídia; Marçalo, AnaWe compiled 46 years of cetacean strandings in the Algarve, Portugal, describing temporal–spatial patterns, size–sex structure,and causes of death (COD). We analyzed national records and years with a dedicated regional stranding network (SN) to assessannual/seasonal trends, spatial hotspots, and compare biometrics and COD. In total, 1231 strandings were recorded; 73.2% wereidentified to 19 species. Five species comprised almost 68% of events: common dolphins 39.0%, striped dolphins 8.9%, minkewhales 8.0%, bottlenose dolphins 8.0%, and harbor porpoises 4.3%. GAMs confirmed that recorded strandings rose over timeand were higher during SN years (mean 63 yr.−1). Stranding hotspots occurred near Cape Santa Maria (Faro–Olhão), Lagos–Portimão, and Sagres; minke whales and harbor porpoises concentrated east of Cape Santa Maria. Seasonality was significantonly for minke whales (spring peak). Size–sex patterns were largely similar, with exceptions for larger stranded striped dolphinfemales and minke strandings dominated by juveniles. COD assignment improved with monitoring and was assessed for 75.6%of the observed carcasses. Bycatch was the leading COD for common dolphins, bottlenose dolphins, and minke whales. Thisstudy highlights the importance of a regional stranding network and a need for more ecological studies of cetaceans in the region.