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Vulnerability of a top marine predator in one of the world’s most impacted marine environments (Arabian Gulf)

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Abstract

Knowledge of the habitat use of wildlife in highly impacted areas is essential to identify areas of biological importance and to implement appropriate conservation measures. The Arabian Gulf represents one of the most extreme marine environments and is considered one of the regions in the world with the greatest anthropogenic impact. Information on the habitat use and abundance of marine top predator species is, however, lacking, despite being a prerequisite for effective planning of conservation measures. Here, we provide novel information for the Indo-Pacific bottlenose dolphin (Tursiops aduncus) in the Arabian Gulf (Abu Dhabi, United Arab Emirates). Data from 80 daily surveys conducted between June 2014 and November 2019 were used both to assess correlates of bottlenose dolphin habitat use and relative density and to calculate mark-recapture abundance estimates. This study confirms the strong adaptability and tolerance of this top marine predator to extreme environmental conditions within a highly heterogeneous and impacted marine habitat. The observed preferences for areas with less human pressure were likely a result of the interactions of environmental factors with prey availability and human disturbance. This study also provides the first abundance estimates for a bottlenose dolphin population in the Arabian Gulf. Our findings support the call for increased marine-protected areas and the creation of transboundary conservation areas in the region. Regional connectivity should be of value to marine predators whose wide distribution and vulnerability to human activities means that alteration of their habitats can result in population declines and eventual local or regional extinctions.

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Acknowledgements

Thanks to the volunteers who came along to help with fieldwork. Data collection complies with the current laws of the country in which it was performed, Abu Dhabi (UAE). We also thank the editor Daniel E. Crocker and the reviewers for their constructive comments that helped improve the manuscript. We dedicate this study to our colleague Edwin Grandcourt who passed away during the period of this research.

Funding

This research has been funded by the Environment Agency—Abu Dhabi (EAD).

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Authors

Contributions

BDL, SM, HD, IB, MAH, and EG collected the data during the study. BDL analysed the data with input from SM BDL wrote the manuscript with significant input from SM, and HD. BDL and SM conceived and designed the study. All authors contributed critically to the manuscript.

Corresponding author

Correspondence to Bruno Díaz López .

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Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Ethical approval

Data collection complies with the current laws of Abu Dhabi, the country in which it was performed. The research adheres to the legal requirements of the country in which the work was carried out (Emirate of Abu Dhabi, UAE), and all institutional guidelines.

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All authors gave final approval to participate.

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All authors gave final approval for publication.

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Responsible Editor: D.E. Crocker.

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Díaz López , B., Methion, S., Das, H. et al. Vulnerability of a top marine predator in one of the world’s most impacted marine environments (Arabian Gulf). Mar Biol 168, 112 (2021). https://doi.org/10.1007/s00227-021-03921-z

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  • DOI: https://doi.org/10.1007/s00227-021-03921-z

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