Capitoline Dolphins: Residency Patterns and Abundance Estimate of Tursiops truncatus at the Tiber River Estuary (Mediterranean Sea)
| Autor: | Pierfrancesco Alaimo Di Loro, Giancarlo Giacomini, Marco Mingione, Daniela Silvia Pace, Daniele Ventura, Edoardo Casoli, Margherita Silvestri, Giovanna Jona Lasinio, Giandomenico Ardizzone, Sara Ferri, Chiara Di Marco, Elena Papale |
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| Přispěvatelé: | Pace, Daniela Silvia, Di Marco, Chiara, Giacomini, Giancarlo, Ferri, Sara, Silvestri, Margherita, Papale, Elena, Casoli, Edoardo, Ventura, Daniele, Mingione, Marco, Alaimo Di Loro, Pierfrancesco, Jona Lasinio, Giovanna, Ardizzone, Giandomenico |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Mediterranean climate bottlenose dolphin 010603 evolutionary biology 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Mark and recapture Mediterranean sea Abundance (ecology) Mediterranean Sea lcsh:QH301-705.5 abundance site fidelity Tiber River Tursiops truncatus capture– recapture geography geography.geographical_feature_category General Immunology and Microbiology biology 010604 marine biology & hydrobiology Population size Estuary Bottlenose dolphin biology.organism_classification capture–recapture Fishery lcsh:Biology (General) Habitat Tursiops truncatu General Agricultural and Biological Sciences |
| Zdroj: | Biology Volume 10 Issue 4 Biology, Vol 10, Iss 275, p 275 (2021) |
| ISSN: | 2079-7737 |
| DOI: | 10.3390/biology10040275 |
| Popis: | Periodic assessments of population status and trends to detect natural influences and human effects on coastal dolphin are often limited by lack of baseline information. Here, we investigated for the first time the site-fidelity patterns and estimated the population size of bottlenose dolphins (Tursiops truncatus) at the Tiber River estuary (central Mediterranean, Tyrrhenian Sea, Rome, Italy) between 2017 and 2020. We used photo-identification data and site-fidelity metrics to study the tendency of dolphins to remain in, or return to, the study area, and capture–recapture models to estimate the population abundance. In all, 347 unique individuals were identified. The hierarchical cluster analysis highlighted 3 clusters, labeled resident (individuals encountered at least five times, in three different months, over three distinct years n = 42), part-time (individuals encountered at least on two occasions in a month, in at least two different years n = 73), and transient (individuals encountered on more than one occasion, in more than 1 month, none of them in more than 1 year n = 232), each characterized by site-fidelity metrics. Open POPAN modeling estimated a population size of 529 individuals (95% CI: 456–614), showing that the Capitoline (Roman) coastal area and nearby regions surrounding the Tiber River estuary represent an important, suitable habitat for bottlenose dolphins, despite their proximity to one of the major urban centers in the world (the city of Rome). Given the high number of individuals in the area and the presence of resident individuals with strong site fidelity, we suggest that conservation plans should not be focused only close to the Tiber River mouths but extended to cover a broader scale of area. |
| Databáze: | OpenAIRE |
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