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In addition, we documented diving feeding behavior in SRWs during their stay in this gulf, which has not been previously described. We assessed this behavior using suction-cup-attached video-imaging tags (CRITTERCAMs) on individual whales. A total of eight CRITTERCAM deployments were successful, and feeding events were documented in all SRWs successfully equipped with CRITTERCAMs. The highest speeds occurred during the ascent phase, and the average diving time was 6\u00a0min 45\u00a0s\u2009\u00b1\u20093\u00a0min 41\u00a0s for SRWs. Concurrently, zooplankton samples were collected from the subsurface and bottom of the water in areas where tagged whales dived to assess differences in composition, abundance, and biomass. Copepods dominated the upper layer, while euphausiids were more abundant in the deeper sample. Furthermore, zooplankton total biomass was five times higher at depth (2515.93\u00a0mg\/m<jats:sup>3<\/jats:sup>) compared to the subsurface (500.35\u00a0mg\/m<jats:sup>3<\/jats:sup>). Differences in zooplankton characteristics between depths, combined with CRITTERCAM videos, indicated that SRWs exploit high concentrations of organisms near the seafloor during daytime feeding dives. This study provides baseline insights into how SRWs utilize Pen\u00ednsula Vald\u00e9s during their stay in the area.<\/jats:p>","DOI":"10.1038\/s41598-024-63879-y","type":"journal-article","created":{"date-parts":[[2024,6,20]],"date-time":"2024-06-20T10:02:42Z","timestamp":1718877762000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Foraging dives of southern right whales (Eubalaena australis) in relation to larger zooplankton size prey availability in Golfo Nuevo, Pen\u00ednsula Vald\u00e9s, Argentina"],"prefix":"10.1038","volume":"14","author":[{"given":"Valeria C.","family":"D\u2019Agostino","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ariadna C.","family":"Nocera","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyler","family":"Abernathy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex Mu\u00f1oz","family":"Wilson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mariano A.","family":"Coscarella","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mariana","family":"Degrati","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,6,20]]},"reference":[{"key":"63879_CR1","unstructured":"Mittermeier, R. 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