Descripción
Eurasian otter (Lutra lutra) occurrence in Morocco. We collected data on otter presences and absences in 270 sites distributed across 34 Moroccan river basins, visited between April 2011 and April 2013. Data collected were used to study the natural and anthropogenic factors associated with otter occurrence in Morocco. More information in: Calzada, J., Clavero, M., Delibes, M., and Fernández, N. Human pressures constrain Eurasian otter occurrence in semiarid Northern Africa. Biodivers Conserv (2022). https://doi.org/10.1007/s10531-022-02405-w
Registros
Los datos en este recurso de evento de muestreo han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 270 registros.
también existen 1 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
Calzada J, Clavero M, Delibes M, Fernández N (2025). Eurasian otter (Lutra lutra) occurrence in Morocco. Version 1.2. Universidad de Huelva. Samplingevent dataset. https://doi.org/10.15470/xyzeiv
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Universidad de Huelva. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: f1cf65f2-b028-48cc-bc5d-d9baf96da827. Universidad de Huelva publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF Spain.
Palabras clave
Samplingevent; Morocco; Population conservation; Lutra lutra; Peripheral populations; Arid rivers
Contactos
- Proveedor De Los Metadatos ●
- Originador ●
- Usuario ●
- Punto De Contacto
- Profesor Titular de Universidad
- Departamento de Ciencias Integradas, Universidad de Huelva, Av/ Tres de Marzo s/n
- 647599214
http://orcid.org/0000-0001-5701-2238
- Originador
- Investigador
- Américo Vespucio s/n
- Originador
- Investigador
- Américo Vespucio s/n
- Originador
- Investigador
- Halle-Jena-Leipzig, Puschstraße 4
Cobertura geográfica
Morocco, North Africa
| Coordenadas límite | Latitud Mínima Longitud Mínima [27,216, -12,393], Latitud Máxima Longitud Máxima [36,102, -0,088] |
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Cobertura taxonómica
No hay descripción disponible
| Especie | Lutra lutra (Eurasian otter) |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 2011-04-01 / 2013-04-30 |
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Métodos de muestreo
The survey sites were selected a priori with the goal of covering as much of the country’s river network as feasible and being at least 30 km apart to uniformly surveying the whole region.
| Área de Estudio | We collected data on otter presences and absences in 270 sites distributed across 34 Moroccan river basins, visited between April 2011 and April 2013. |
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| Control de Calidad | Data quality was ensured through several procedures. All surveys were conducted simultaneously by two observers to minimize detection bias. The surveyors had proven experience in identifying mammal tracks in general, and otter signs in particular. Geographic coordinates were recorded using a GPS device only when the positional error was less than 5 meters. |
Descripción de la metodología paso a paso:
- We applied the standard otter survey method, which consists in sampling up to 600 m along the river shore searching for otter signs (spraints, anal scent gland secretions and tracks). River shores were inspected by at least two experienced surveyors in each survey. A site was coded as positive, and the survey was finished, as soon as an otter sign was found, while it was considered negative when the 600 m-long transect was completed without finding any sign.
Referencias bibliográficas
- Calzada, J., Clavero, M., Delibes, M., and Fernández, N. Human pressures constrain Eurasian otter occurrence in semiarid Northern Africa. Biodivers Conserv (2022). https://doi.org/10.1007/s10531-022-02405-w https://doi.org/10.1007/s10531-022-02405-w
- Delibes M, Calzada J, Clavero M et al (2012) The near threatened Eurasian otter Lutra lutra in Morocco: no sign of recovery. Oryx 46:249–252. https:// doi. org/ 10. 1017/ S0030 60531 10015 17 https:// doi. org/ 10. 1017/ S0030 60531 10015 17
Metadatos adicionales
| Agradecimientos | We acknowledge the help of our colleagues in conducting the field sampling: Begoña Adrados, Seila Alvaré, Manuela González, Carlos Gutiérrez-Expósito, Miguel Jácome, Francisco Palomares, Carli Pérez, Eloy Revilla, Jacinto Román and Pablo Villalba, and the scientific advice of Abdeljebbar Qninba and his help in processing the permits necessary to conduct the study. We thank three anonymous referees for their constructive comments on an earlier manuscript. The picture of an otter used in Figure 4 was donated by Juan Matutano. Sampling permissions were obtained from the Haut Commissariat aux Eaux et Forêts et a la Lutte contre la Désertification du Royaume du Maroc. Financial support was received from Estación Biológica de Doñana-CSIC. N.F. acknowledges the support of iDiv funded by the German Research Foundation (DFG–FZT 118, 202548816). Funding for Open Access charge: Universidad de Huelva / CBUA. |
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| Introducción | In many developing countries, the conservation status of species is not monitored as regularly as it should be. Little was known about the population trends of the Eurasian otter (Lutra lutra) in Morocco. Between 8 and 21 April 1983, Macdonald and Mason surveyed 90 sites in northern and western Morocco, and since then no new data have been published on the species in the country. We collected data on otter presence and absence at 270 sites distributed across 34 Moroccan river basins, visited between April 2011 and April 2013. We revisited all the sites surveyed by Macdonald and Mason, as well as additional locations across the country. These data are crucial for assessing the conservation status of Lutra lutra in North Africa and for designing effective management strategies to support the recovery of the species. |
| Identificadores alternativos | 10.15470/xyzeiv |
| f1cf65f2-b028-48cc-bc5d-d9baf96da827 | |
| https://ipt.gbif.es/resource?r=uhu_lutra |