Описание
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
Записи данных
Данные этого sampling event ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 270 записей.
Также в наличии 1 таблиц с данными расширений. Записи расширений содержат дополнительную информацию об основной записи. Число записей в каждой таблице данных расширения показано ниже.
Данный экземпляр IPT архивирует данные и таким образом служит хранилищем данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. В таблице версий перечислены другие версии ресурса, которые были доступны публично, что позволяет отслеживать изменения, внесенные в ресурс с течением времени.
Версии
В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.
Как оформить ссылку
Исследователи должны дать ссылку на эту работу следующим образом:
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
Права
Исследователи должны соблюдать следующие права:
Публикующей организацией и владельцем прав на данную работу является Universidad de Huelva. Эта работа находится под лицензией Creative Commons Attribution (CC-BY 4.0).
Регистрация в GBIF
Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: f1cf65f2-b028-48cc-bc5d-d9baf96da827. Universidad de Huelva отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке GBIF Spain.
Ключевые слова
Samplingevent; Morocco; Population conservation; Lutra lutra; Peripheral populations; Arid rivers
Контакты
- Metadata Provider ●
- Originator ●
- User ●
- Point Of Contact
- 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
- Originator
- Investigador
- Américo Vespucio s/n
- Originator
- Investigador
- Américo Vespucio s/n
- Originator
- Investigador
- Halle-Jena-Leipzig, Puschstraße 4
Географический охват
Morocco, North Africa
| Ограничивающие координаты | Юг Запад [27,216, -12,393], Север Восток [36,102, -0,088] |
|---|
Таксономический охват
Описание отсутсвует
| Species | Lutra lutra (Eurasian otter) |
|---|
Временной охват
| Дата начала / Дата окончания | 2011-04-01 / 2013-04-30 |
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Методы сбора
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.
| Охват исследования | We collected data on otter presences and absences in 270 sites distributed across 34 Moroccan river basins, visited between April 2011 and April 2013. |
|---|---|
| Контроль качества | 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. |
Описание этапа методики:
- 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.
Библиографические ссылки
- 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
Дополнительные метаданные
| Благодарности | 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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| Введение | 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. |
| Альтернативные идентификаторы | 10.15470/xyzeiv |
| f1cf65f2-b028-48cc-bc5d-d9baf96da827 | |
| https://ipt.gbif.es/resource?r=uhu_lutra |