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Inferring spatial and temporal behavioral patterns of free-ranging manatees using saltwater sensors of telemetry tags

Castelblanco Martínez, Delma Nataly [autora] | Morales Vela, José Benjamín [autor] | Slone, Daniel H [autor] | Padilla Saldívar, Janneth A, 1971- [autor] | Reid, James P [autor] | Hernández Arana, Héctor Abuid [autor].
Tipo de material: Artículo ArtículoTipo de contenido: Texto Tipo de medio: Computadora Tipo de portador: Recurso en líneaTema(s): Trichechus manatus | Conducta animal | Ecología animalTema(s) en inglés: Trichechus manatus | Animal behavior | Animal ecologyDescriptor(es) geográficos: Bahía de Chetumal, Othón P. Blanco (Quintana Roo, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Mammalian Biology - Zeitschrift für Säugetierkunde. volumen 80, número 1 (January 2015), páginas 21-30. --ISSN: 1616-5047Número de sistema: 53519Resumen:
Inglés

Diving or respiratory behavior in aquatic mammals can be used as indicator of physiological activity and consequently, to infer behavioral patterns. Five Antillean manatees, Trichechus manatus manatus, were captured in Chetumal Bay and tagged with GPS tracking devices. The radios were equipped with a micropower saltwater sensor (SWS), which records the times when the tag assembly was submerged. The information was analyzed to establish individual fine-scale behaviors. For each fix, we established the following variables: Distance (D), sampling interval (T), movement rate (D/T), number of dives (N), and total diving duration (TDD). We used logic criteria and simple scatterplots to distinguish between behavioral categories: 'Travelling' (D/T≥3 km/h), 'Surface' (↓TDD,↓N), 'Bottom feeding' (↑TDD,↑N) and 'Bottom resting' (↑TDD,↓N). Habitat categories were qualitatively assigned: Lagoon, Channels, Caye shore, City shore, Chanel edge, and Open areas. The instrumented individuals showed a daily rhythm of bottom activities, with surfacing activities more frequent during the night and early in the morning. More investigation into those cycles and other individual fine-scale behaviors related to their proximity to concentrations of human activity would be informative.

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Disponible para usuarios de ECOSUR con su clave de acceso

Diving or respiratory behavior in aquatic mammals can be used as indicator of physiological activity and consequently, to infer behavioral patterns. Five Antillean manatees, Trichechus manatus manatus, were captured in Chetumal Bay and tagged with GPS tracking devices. The radios were equipped with a micropower saltwater sensor (SWS), which records the times when the tag assembly was submerged. The information was analyzed to establish individual fine-scale behaviors. For each fix, we established the following variables: Distance (D), sampling interval (T), movement rate (D/T), number of dives (N), and total diving duration (TDD). We used logic criteria and simple scatterplots to distinguish between behavioral categories: 'Travelling' (D/T≥3 km/h), 'Surface' (↓TDD,↓N), 'Bottom feeding' (↑TDD,↑N) and 'Bottom resting' (↑TDD,↓N). Habitat categories were qualitatively assigned: Lagoon, Channels, Caye shore, City shore, Chanel edge, and Open areas. The instrumented individuals showed a daily rhythm of bottom activities, with surfacing activities more frequent during the night and early in the morning. More investigation into those cycles and other individual fine-scale behaviors related to their proximity to concentrations of human activity would be informative. eng

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