說明
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
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 270 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
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
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 Universidad de Huelva。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: f1cf65f2-b028-48cc-bc5d-d9baf96da827。 Universidad de Huelva 發佈此資源，並經由GBIF Spain同意向GBIF註冊成為資料發佈者。
關鍵字
Samplingevent; Morocco; Population conservation; Lutra lutra; Peripheral populations; Arid rivers
聯絡資訊
- 元數據提供者 ●
- 出處 ●
- 使用者 ●
- 連絡人
- 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
- 出處
- Investigador
- Américo Vespucio s/n
- 出處
- Investigador
- Américo Vespucio s/n
- 出處
- Investigador
- Halle-Jena-Leipzig, Puschstraße 4
地理涵蓋範圍
Morocco, North Africa
| 界定座標範圍 | 緯度南界 經度西界 [27.216, -12.393], 緯度北界 經度東界 [36.102, -0.088] |
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分類群涵蓋範圍
無相關描述
| Species | Lutra lutra (Eurasian otter) |
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時間涵蓋範圍
| 起始日期 / 結束日期 | 2011-04-01 / 2013-04-30 |
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取樣方法
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.
| 研究範圍 | We collected data on otter presences and absences in 270 sites distributed across 34 Moroccan river basins, visited between April 2011 and April 2013. |
|---|---|
| 品質控管 | 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. |
方法步驟描述:
- 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.
引用文獻
- 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
額外的詮釋資料
| 致謝 | 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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| Introduction | 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. |
| 替代的識別碼 | 10.15470/xyzeiv |
| f1cf65f2-b028-48cc-bc5d-d9baf96da827 | |
| https://ipt.gbif.es/resource?r=uhu_lutra |