Two Decades Without the Mediterranean Monk Seal in the Al Hoceima Marine Protected Area: Habitat Suitability Assessment and Monitoring Insights

Authors

  • Souhail KARIM

    Laboratory of Applied Geosciences Research & Development, Faculty of Science and Technology, Abdelmalek Essaadi University, Al Hoceima 32000, Morocco
  • Hasna BOUAZZATI

    Research Laboratory in Applied and Marine Geosciences, Geotechnics and Geohazards (LR3G), Faculty of Sciences, Abdelmalek Essaadi University, Tetouan 93002, Morocco
  • Hinde CHERKAOUI DEKKAKI

    Laboratory of Applied Geosciences Research & Development, Faculty of Science and Technology, Abdelmalek Essaadi University, Al Hoceima 32000, Morocco

DOI:

https://doi.org/10.30564/re.v7i5.11539
Received: 8 August 2025| Revised: 27 August 2025 | Accepted: 10 September 2025 | Published Online: 20 November 2025

Abstract

The Mediterranean monk seal (Monachus monachus) is an endangered pinniped species historically distributed along the Moroccan Mediterranean coast. Despite confirmed historical presence in the Al Hoceima region, no sightings have been recorded for over two decades. Between 2024 and 2025, a coastal habitat monitoring campaign was conducted within the Al Hoceima Marine Protected Area (MPA) to assess the structural availability and oceanographic suitability of haul-out caves for potential monk seal recolonization. A total of 15 sea caves were surveyed along a 40 km segment of coastline, using geospatial mapping, geomorphological characterization, and swell exposure assessment. Caves were classified into three suitability categories based on morphological depth, elevation of resting platforms above tidal influence, exposure to prevailing hydrodynamic conditions, and degree of anthropogenic disturbance. Three caves (Category A) were identified as highly suitable, exhibiting deep, sheltered configurations with minimal swell penetration and structurally stable platforms above mean sea level. Eight infrared camera traps were deployed in selected high-potential caves to monitor biological and human activity. Although no monk seals were detected (~240 camera-days), the study confirmed the integrity of several key marine cavities and highlighted episodic human presence, including artisanal fishing and ecotourism. These findings provide a critical geospatial and structural baseline for marine habitat monitoring in the region and emphasize the relevance of integrating coastal morphology, marine dynamics, and spatial protection in future monitoring frameworks. The results support adaptive management strategies and inform oceanographic approaches to habitat restoration and species recovery in semi-enclosed Mediterranean systems.

Keywords:

Coastal Morphology; Sea Cave Habitat; Al Hoceima Marine Protected Area; Monk Seal Monitoring

References

[1] Karamanlidis, A.A., Dendrinos, P., De Larrinoa, P.F., et al., 2016. The M editerranean monk seal M onachus monachus : status, biology, threats, and conservation priorities. Mammal Review. 46(2), 92–105. DOI: https://doi.org/10.1111/mam.12053

[2] Amlin, A., Rendell, L., Pierantonio, N., et al., 2025. Confirmed vocal activity of Mediterranean monk seals in the Inner Ionian Sea Archipelago, Greece. The Journal of the Acoustical Society of America. 157(4), 3204–3213. DOI: https://doi.org/10.1121/10.0036436

[3] Mo, G., 2011. Survey on Mediterranean Monk Seal (Monachus monachus) Sightings in Mediterranean Morocco. Aquatic Mammals. 37(3), 248–255. DOI: https://doi.org/10.1578/AM.37.3.2011.248

[4] Ibrahim, A., Hussein, C., Alshawy, F., et al., 2024. Distribution and habitats of the Mediterranean Monk Seal (Monachus monachus): In the Syrian Coast (Eastern Mediterranean). Species. 25(75), 1–8. DOI: https://doi.org/10.54905/disssi.v25i75.e2s1624

[5] Adamantopoulou, S., 2011. Movements of Mediterranean Monk Seals (Monachus monachus) in the Eastern Mediterranean Sea. Aquatic Mammals. 37(3), 256–261. DOI: https://doi.org/10.1578/AM.37.3.2011.256

[6] Quintana-Martín, M., Montalvo, B., & Muñoz-Cañas, M., 2025. Mediterranean monk seal: A comprehensive set of monitoring and research techniques for the study and conservation of Monachus monachus in the Mediterranean Sea, 1st ed. IUCN: Gland, Switzerland. Available from: https://portals.iucn.org/library/sites/library/files/documents/2025-006-En.pdf (cited 7 June 2021).

[7] Bouazzati, H., Damghi, A., M’rini, A.E., et al., 2024. Water Quality and Environmental Resilience to Climate Change: A Comprehensive Analysis of the Al Hoceima Marine Protected Area. Journal of Coastal Research. 113(sp1). DOI: https://doi.org/10.2112/JCR-SI113-205.1

[8] Damghi, A., Bouazzati, H., El M’rini, A., et al., 2024. Exploring Coastal Dynamics in Morocco’s Mediterranean Region using (AUV) Technology. Journal of Coastal Research. 113(sp1). DOI: https://doi.org/10.2112/JCR-SI113-136.1

[9] Bouazzati, H., Damghi, A., El M’rini, A., et al., 2025. Evaluating Microplastic Concentrations in the Al Hoceima Marine Protected Area: Implications for Identifying Pollution Hotspots and Formulating Conservation Strategies. Sustainable Marine Structures. 1–21. DOI: https://doi.org/10.36956/sms.v7i2.1809

[10] Vargas-Yáñez, M., Plaza, F., Garcı́a-Lafuente, J., et al., 2002. About the seasonal variability of the Alboran Sea circulation. Journal of Marine Systems. 35(3–4), 229–248. DOI: https://doi.org/10.1016/S0924-7963(02)00128-8

[11] Amores, A., Monserrat, S., Marcos, M., 2013. Vertical structure and temporal evolution of an anticyclonic eddy in the Balearic Sea (western Mediterranean). Journal of Geophysical Research: Oceans. 118(4), 2097–2106. DOI: https://doi.org/10.1002/jgrc.20150

[12] Bouazzati, H., Damghi, A., Gao, X., et al., 2025. DataDriven Environmental Monitoring Using Autonomous Underwater Vehicles: Adaptive Sampling in The Al Hoceima Marine Protected Area. Sustainable Marine Structures. DOI: https://doi.org/10.36956/sms.v7i3.2162

[13] Schroeder, K., Garcìa-Lafuente, J., Josey, S.A., et al., 2012. Circulation of the Mediterranean Sea and its Variability. In: Lionello, P. (ed.). The Climate of the Mediterranean Region. Elsevier: Amsterdam, Netherlands. pp. 187–256. DOI: https://doi.org/10.1016/B978-0-12-416042-2.00003-3

[14] El Mrini, A., Anthony, E.J., Maanan, M., et al., 2012. Beach-dune degradation in a Mediterranean context of strong development pressures, and the missing integrated management perspective. Ocean & Coastal Management. 69, 299–306. DOI: https://doi.org/10.1016/j.ocecoaman.2012.08.004

[15] Johnson, W. M., Lavigne, D.M., 1999. Monk seals in antiquity. In: The Mediterranean Monk Seal. Netherlands Commission for International Nature Protection: Amsterdam, Netherlands. pp. 1–101. Available from: https://monachus-guardian.org/library/mededelingen35_2008b.pdf (cited 7 June 2021).

[16] Benedetti-Cecchi, L., Bates, A.E., Strona, G., et al., 2024. Marine protected areas promote stability of reef fish communities under climate warming. Nature Communications. 15(1), 1822. DOI: https://doi.org/10.1038/s41467-024-44976-y

[17] Puertos del Estado, 2023. Wave and Wind Observations in the Alboran Sea. Available from: https://www.puertos.es/ (cited 7 June 2021).

[18] García Lafuente, J., Álvarez Fanjul, E., Vargas, J.M., et al., 2002. Subinertial variability in the flow through the Strait of Gibraltar. Journal of Geophysical Research: Oceans. 107(C10). DOI: https://doi.org/10.1029/2001JC001104

[19] Saydam, E., Güçlüsoy, H., Kızılkaya, Z.A., 2023. A novel approach for Mediterranean monk seal conservation: an artificial ledge in a marine cave. Oryx. 57(2), 149–151. DOI: https://doi.org/10.1017/S0030605321001046

[20] Caravaggi, A., Banks, P.B., Burton, A.C., et al., 2017. A review of camera trapping for conservation behaviour research. Remote Sensing in Ecology and Conservation. 3(3), 109–122. DOI: https://doi.org/10.1002/rse2.48

[21] Glover‐Kapfer, P., Soto‐Navarro, C.A., Wearn, O.R., 2019. Camera‐trapping version 3.0: current constraints and future priorities for development. Remote Sensing in Ecology and Conservation. 5(3), 209–223. DOI: https://doi.org/10.1002/rse2.106

[22] Dendrinos, P., Karamanlidis, A.A., Androukaki, E., et al., 2007. DIVING DEVELOPMENT AND BEHAVIOR OF A REHABILITATED MEDITERRANEAN MONK SEAL ( MONACHUS MONACHUS ). Marine Mammal Science. 23(2), 387–397. DOI: https://doi.org/10.1111/j.1748-7692.2007.00115.x

[23] Siegfried, T.R., Fuentes, M.M.P.B., Ware, M., et al., 2021. Validating the use of stereo‐video cameras to conduct remote measurements of sea turtles. Ecology and Evolution. 11(12), 8226–8237. DOI: https://doi.org/10.1002/ece3.7653

[24] European Marine Observation and Data Network (EMODnet), 2023. Bathymetry Consortium. Available from: https://emodnet.ec.europa.eu/en/bathymetry (cited 7 June 2021).

[25] Copernicus Marine Service, 2024. Wave and Ocean Current Forecast Products. Available from: https://marine.copernicus.eu/ (cited 7 June 2021).

[26] Dendrinos, P., Adamantopoulou, S., Tounta, E., et al., 2022. The Mediterranean Monk Seal (Monachus monachus) in the Aegean Sea. “The Living Myth of the Sirens.” In: Anagnostou, C.L., Kostianoy, A.G., Mariolakos, I.D., et al. (eds.). The Aegean Sea Environment, The Handbook of Environmental Chemistry. Springer Nature: Cham, Switzerland. pp. 211–233. DOI: https://doi.org/10.1007/698_2022_897

[27] Cox, S.L., Embling, C.B., Hosegood, P.J., et al., 2018. Oceanographic drivers of marine mammal and seabird habitat-use across shelf-seas: A guide to key features and recommendations for future research and conservation management. Estuarine, Coastal and Shelf Science. 212, 294–310. DOI: https://doi.org/10.1016/j.ecss.2018.06.022

[28] Vargas-Yáñez, M., Plaza, F., Garcı́a-Lafuente, J., et al., 2002. About the seasonal variability of the Alboran Sea circulation. Journal of Marine Systems. 35(3–4), 229–248. DOI: https://doi.org/10.1016/S0924-7963(02)00128-8

[29] Renault, L., Oguz, T., Pascual, A., et al., 2012. Surface circulation in the Alborán Sea (western Mediterranean) inferred from remotely sensed data. Journal of Geophysical Research: Oceans. 117(C8), 2011JC007659. DOI: https://doi.org/10.1029/2011JC007659

[30] Tintoré, J., Gomis, D., Alonso, S., et al., 1991. Mesoscale Dynamics and Vertical Motion in the Alborán Sea. Journal of Physical Oceanography. 21(6), 811–823. DOI: https://doi.org/10.1175/1520-0485(1991)021%253C0811:MDAVMI%253E2.0.CO;2

[31] Copernicus Marine Service, 2021. Mediterranean Sea Wave Reanalysis. Available from: https://data.marine.copernicus.eu/product/MEDSEA_MULTIYEAR_WAV_006_012/description (cited 7 June 2021).

[32] Salmona, J., Dayon, J., Lecompte, E., et al., 2022. The antique genetic plight of the Mediterranean monk seal ( Monachus monachus ). Proceedings of the Royal Society B: Biological Sciences. 289(1981), 20220846. DOI: https://doi.org/10.1098/rspb.2022.0846

[33] Sergeant, D., Ronald, K., Boulva, J., et al., 1978. The recent status of Monachus monachus, the Mediterranean monk seal. Biological Conservation. 14(4), 259–287. DOI: https://doi.org/10.1016/0006-3207(78)90044-7

[34] Recher, H.F., 2011. The Theory of Island Biogeography Revisited: BOOK REVIEW. Austral Ecology. 36(7), e36–e37. DOI: https://doi.org/10.1111/j.1442-9993.2010.02226.x

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How to Cite

KARIM, S., BOUAZZATI, H., & CHERKAOUI DEKKAKI, H. (2025). Two Decades Without the Mediterranean Monk Seal in the Al Hoceima Marine Protected Area: Habitat Suitability Assessment and Monitoring Insights. Research in Ecology, 7(5), 245–256. https://doi.org/10.30564/re.v7i5.11539

Issue

Vol.7, Iss.5 (December 2025)(in progress)

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Article

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Copyright © 2025 Souhail KARIM, Hasna BOUAZZATI, Hinde CHERKAOUI DEKKAKI

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This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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