Anomalously White Atlantic Spotted Dolphins (Stenella frontalis, Cuvier, 1892) Off the Azores

Santos, Rui M. Borges dos; Simião, Susana; Madruga, Pedro; Mendonça, Ana; Seitre, Roland; Gomes‐Pereira, José Nuno

doi:10.1578/am.42.2.2016.245

Cited by 3 publications

(2 citation statements)

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“…Cetaceans, including whales and dolphins, produce bubbles from their blowholes, which is fundamentally a physiological necessity for expelling air (Dudzinski, 1998; Hain et al, 1982) except for when making bubble rings (Ramos et al, 2022). Cetaceans use bubble production as a form of signaling aggression, stress, distress, or aversion.…”

Section: Figurementioning

confidence: 99%

“…The drivers for bubble trail production are likely complex and difficult to relate to any single behavior, an ongoing debate in the scientific community. Bubble trails have been linked to intrasexual competition in humpback whales (Baker & Herman, 1984; Tyack & Whitehead, 1982), communication signals in bottlenose dolphins (Herzing, 2000; Moreno & Macgregor, 2019; Pryor, 1990), and multiple behavioral contexts were recorded for Atlantic spotted dolphins such as aggression, agonistic interactions, avoidance, excitement or agitation, social interactions, threats, or conflicts (with other species or humans) (Dudzinski, 1998; Herzing, 1996; Wood, 1953).…”

Section: Figurementioning

confidence: 99%

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First evidence of bubble trail production in Eden's whale (Balaenoptera edeni edeni)

Ibrahim,

Sun,

et al. 2024

Marine Mammal Science

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Cetaceans, including whales and dolphins, produce bubbles from their blowholes, which is fundamentally a physiological necessity for expelling air (Dudzinski, 1998;Hain et al., 1982) except for when making bubble rings (Ramos et al., 2022). Cetaceans use bubble production as a form of signaling aggression, stress, distress, or aversion.Bubble production serves practical purposes too, often utilized as a foraging tool. Notably, bottlenose dolphins (Tursiops spp.) use bubble rings for capturing prey, a behavior reported by Moreno (2017). Sociality among toothed whales, such as Atlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins, is also reflected by the creation of bubble clouds or bursts (Herzing, 1996;Moreno, 2017).Baleen whales, including the humpback whale (Megaptera novaeangliae), exhibit distinct bubble-related behaviors (Moreno & Macgregor, 2019;Reidenberg & Laitman, 2007). These range from creating bubble nets as foraging tools, to using bubble clouds as a foraging technique, particularly evident in the Gulf of Maine population (Hain et al., 1982). These whales also employ bubbles for combat or as a distraction technique against predators (Sharpe & Dill, 1997;Wiley et al., 2011). Male humpback whales specifically use bubble trails as visual signals to lure females or as a warning signal to conspecifics, indicating aggression, distress, or aversion (Hain et al., 1982;Sharpe & Dill, 1997;Wiley et al., 2011).Bubble-related behavior in other baleen whales, albeit less studied than in humpback whales, has also been observed in many other balaenopterid (rorqual) species such as fin whales (Balaenoptera physalus), minke whales (B. acutorostrata), blue whales (B. musculus), and Eden's whales (B. edeni edeni) (Kot et al., 2014;Watkins et al., 1981).The rorquals use bubble nets or clouds during corralling prey and during social interactions, more commonly for the latter than as a foraging tool. However, a lack of detailed background information regarding the physical patterns, events, and associated behaviors often limits these observations (Kot et al., 2014).Of the rorqual group, the Bryde's whale (B. edeni) is the least understood (Constantine et al., 2015(Constantine et al., , 2018. There are two subspecies: the larger Bryde's whale (B. e. brydei), and the smaller Eden's whale (B. e. edeni;Constantine et al., 2018). This study focuses on the latter species. Recent studies on this species have reported highly variable

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

First evidence of bubble trail production in Eden's whale (Balaenoptera edeni edeni)

Ibrahim,

Sun,

et al. 2024

Marine Mammal Science

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Atlantic Spotted Dolphin Stenella frontalis (G. Cuvier, 1829)

Silva

Chevallard²,

Pérez‐Jorge

2021

Handbook of the Mammals of Europe

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Wild leucistic Risso’s dolphins (Grampus griseus) in the Azores

Gomes‐Pereira¹,

Vieira²,

Dionísio³

2023

Cienc. Mar.

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Leucism has been reported in at least 14 cetacean species, including Risso’s dolphin (Grampus griseus). Risso’s dolphins with abnormal pigmentation were sighted and photographed north of Faial Island, Azores Archipelago, in 6 separate events between 2020 and 2023. In 2020, a calf and a juvenile/subadult were observed within a group of over 100 individuals. A leucistic calf with pale skin and dark eyes was observed in 2021, 2022, and 2023 in the same area followed by the same adult within a pod of about 12 individuals, including 3 juveniles, all with normal coloration. This is the first report of wild leucistic Risso’s dolphins in the Atlantic, which could be of interest in future local population and hypopigmentation studies on a dolphin species known to become completely white with age.

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Anomalously White Atlantic Spotted Dolphins (Stenella frontalis, Cuvier, 1892) Off the Azores

Cited by 3 publications

References 0 publications

First evidence of bubble trail production in Eden's whale (Balaenoptera edeni edeni)

First evidence of bubble trail production in Eden's whale (Balaenoptera edeni edeni)

Atlantic Spotted Dolphin Stenella frontalis (G. Cuvier, 1829)

Wild leucistic Risso’s dolphins (Grampus griseus) in the Azores

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