{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,14]],"date-time":"2025-07-14T08:40:08Z","timestamp":1752482408817,"version":"3.41.2"},"reference-count":102,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2025,7,14]],"date-time":"2025-07-14T00:00:00Z","timestamp":1752451200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Grand Port Maritime de Martinique, the Office Fran\u00e7ais de la Biodiversit\u00e9 and the Agoa Sanctuary"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>For a deep-diving cetacean species like the sperm whale, acoustics is a vital tool for research. This need is especially pressing in the eastern Caribbean, where the habitat of marine mammals overlaps with heavy maritime traffic, leading to noise pollution and an increased risk of vessel collisions. To mitigate this risk, understanding their habitat use is essential. Mature males are generally solitary and migrate over long distances, while females and immatures form stable social units in subtropical and tropical waters. In this study, we examined intraspecific variation in distribution and habitat use among individuals along the Caribbean coast of Martinique, using both visual and acoustic data. Over the course of 24 surveys, 19 aggregations involving a total of 74 individual sightings were characterised, recognizing that some individuals may have been recorded multiple times. Using the inter-pulse interval (IPI) of clicks, we estimated individual size, which provided insights into the age and\/or sex of each individual. Habitat characteristics included bathymetry, distance from the coast, and seabed slope. Our results on social structure are in line with previous literature: 37% of the aggregations were made up of females and\/or juveniles, immatures, with a mature male nearby, with temporal changes in aggregations linked to male migration patterns. Spatial distribution and habitat use appeared consistent across aggregation types, regardless of group size, average individual size, or the presence of immatures. However, specific areas were identified for hunting and socialising based on bathymetry. This study highlights the importance of bathymetry and\/or distance from the coast and temporal dynamics related to variations in weather conditions and movements of breeding males, in understanding habitat use by sperm whales in the eastern Caribbean. The lack of observed influence of seabed slope suggests that our spatial scale may have been too limited, or that finer details regarding seabed characteristics are needed. These findings could inform traffic management strategies to reduce the risk of vessel collisions with sperm whales.<\/jats:p>","DOI":"10.7717\/peerj.19614","type":"journal-article","created":{"date-parts":[[2025,7,14]],"date-time":"2025-07-14T08:07:02Z","timestamp":1752480422000},"page":"e19614","source":"Crossref","is-referenced-by-count":0,"title":["Intraspecific and spatial variation in habitat use by sperm whales (<i>Physeter macrocephalus<\/i>) along the west coast of Martinique"],"prefix":"10.7717","volume":"13","author":[{"given":"S\u00e9r\u00e9na","family":"Laurent","sequence":"first","affiliation":[{"name":"Aquasearch, Sainte-Luce, Martinique"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marion","family":"Poupard","sequence":"additional","affiliation":[{"name":"Aquasearch, Sainte-Luce, Martinique"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C\u00e9lia","family":"Ortol\u00e9","sequence":"additional","affiliation":[{"name":"Aquasearch, 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