Bryde’s Whales (Balaenoptera brydei) off the North Coast of São Paulo, Brazil: First Photo-Identification Study

Athayde, Aline; Cardoso, Júlio; Francisco, Arlaine; Siciliano, Salvatore

doi:10.1578/am.46.5.2020.488

Cited by 7 publications

(10 citation statements)

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“…Site fidelity, defined as the tendency of an animal to return to a previously occupied place (Baird et al, 2008), has been demonstrated for Bryde's whales through the use of photographic identification (hereafter referred to as photo‐id) in some areas of the world, such as the coastal areas of Ecuador, Peru, and Panama (Castro et al, 2017), in Brazil (Figueiredo et al, 2014; Lodi et al, 2015; Athayde et al, 2020), in the Gulf of Mexico (Rosel & Wilcox, 2014; Rosel et al, 2021), in the Gulf of California (Tershy, 1992), and in New Zealand (Tezanos‐Pinto et al, 2017). Nevertheless, studies evaluating residency times through the application of lagged identification rates have never been conducted for Bryde's whales, nor have the movements of individuals been detected between distant regions.…”

Section: Introductionmentioning

confidence: 99%

Bryde's whales in the North‐East Atlantic: New insights on site fidelity and connectivity between oceanic archipelagos

Ferreira

Dinis

Badenas

et al. 2021

Aquatic Conservation

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The conservation of marine megafauna presents numerous difficulties owing to their high mobility over difficult‐to‐access oceanic areas that impairs the collection of basic, but essential, biological information. The Bryde's whale (Balaenoptera edeni) is one of the most elusive species of baleen whales, and although it is known to be a seasonal visitor to several archipelagos in Macaronesia (the Azores, Madeira, and Canaries), there are no studies regarding its occurrence or geographical connectivity in this area of the Atlantic. A 14‐year photographic database was used to determine short‐term (intra‐seasonal) and long‐term (inter‐annual) Bryde's whale site fidelity and to estimate individual residency times in Madeira, whereas photographic catalogues from Madeira and the Canaries were compared in order to assess large‐scale movements (i.e. on the scale of hundreds of kilometres). In Madeira, 59 individuals were identified, 27 (45.8%) of which were recaptured. Of these, 10 individuals (37.0%) presented short‐term site fidelity and 17 individuals (63.0%) presented long‐term site fidelity, with a maximum recapture interval of 12 years. Lagged identification rates showed that five individuals (SE = 2) remained in the area for 32 days (SE = 108 days) before leaving and not returning during the same year. Seven individuals were seen both in Madeira and the Canaries (catalogue comprising 51 individuals), three of which were identified multiple times in both archipelagos, with a minimum of 43 days between consecutive sightings. This information combined with the fact that this species is commonly sighted accompanied by calves and feeding in both archipelagos highlights the ecological importance of this area for Bryde's whales. This should be taken into consideration by policymakers when implementing conservation measures, where coordination of effort among countries is needed. This study also reinforces the value of using data from platforms of opportunity and of making photographic data open access.

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Section: Introductionmentioning

confidence: 99%

Bryde's whales in the North‐East Atlantic: New insights on site fidelity and connectivity between oceanic archipelagos

Ferreira

Dinis

Badenas

et al. 2021

Aquatic Conservation

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“…Bryde's whales were identified by three prominent ridges located in front of the blowhole, and individuals were photo-identified using distinctive dorsal fin marks and forms (Figure 1). Based on these data, in 2020 the first photo-identification catalogue of Bryde's whales was published (Athayde et al, 2020), containing 106 records and covering the northern coast of São Paulo and nearby waters. In the catalogue, 44 whales could be individually photo-identified by their distinctive dorsal fin marks in the study area between 2004 and 2019.…”

Section: Methodsmentioning

confidence: 99%

“…In the catalogue, 44 whales could be individually photo-identified by their distinctive dorsal fin marks in the study area between 2004 and 2019. Using the same methods as described in Athayde et al (2020), this number has now been updated to 156 records, totalling 67 photo-identified individuals between 2004 and January 2022. A total of 8,068 photos were analysed to identify whales with scars compatible with impacts from a vessel's propeller.…”

Section: Methodsmentioning

confidence: 99%

“…In order to increase the information on this species in the region, photo‐identification research concerning Bryde's whales has been continuing since 2016 off the northern coast of the state of São Paulo (Athayde et al, 2020). Based on this information, this article highlights cases of vessel strikes on Bryde's whales in the region, contributing to the future evaluation of the conservation status of B. brydei off Brazil.…”

Section: Introductionmentioning

confidence: 99%

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A vessel collision report for Bryde's whales (Balaenoptera brydei) off the northern coast of São Paulo, Brazil

Athayde¹,

Cardoso²,

Francisco³

et al. 2022

Aquatic Conservation

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Vessel collisions are an important threat to several cetacean species, both large and small. In addition to negatively affecting the animals themselves, collisions can also damage or sink vessels, threatening both human safety and marine industry economics. Larger cetaceans seem to be the most affected by vessel collisions, and vessel strikes with Bryde's whales (Balaenoptera brydei/Balaenoptera edeni) have been reported worldwide. Long‐term photo‐identification research on Bryde's whales off the northern coast of the state of São Paulo, Brazil, has been continuing since 2016. Of the 67 individuals that were photo‐identified between 2004 and January 2022, three (4%) presented scars compatible with injuries from vessel propellers. These data contribute towards an understanding of the long‐term effects of collision injuries on the behaviour and survival of Bryde's whales. This report is intended to help inform the future evaluation of the conservation status of B. brydei off Brazil.

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“…Bryde’s whale species identification was confirmed based on the presence of three longitudinal ridges that run parallel to the rostrum and a falcate dorsal fin (Jefferson et al ., 2015). Individual identification was based on dorsal fin shape and nicks, which has been applied successfully on different Bryde's whale populations (Tershy, 1992; Steiner et al ., 2008; Athayde et al ., 2020). In mysticete species, a calf is identified as one-third to half of the body length of the accompanying adult, presumed to be the mother (Taber and Thomas, 1982).…”

mentioning

confidence: 99%

Sightings of Bryde's whale, Balaenoptera edeni, off the Pacific coast of Nicaragua

De Weerdt,

Patulny,

Ruiz Pérez

et al. 2024

J. Mar. Biol. Ass.

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Here, we report the first sighting records of Bryde's whales in Nicaragua. Four sightings were made in 2022 during boat-based surveys off the southwestern coast of Nicaragua. Photo-identification, distributional data, dive times, and behavioural information were collected, and environmental parameters, including sea surface temperature, were measured for each sighting. Sightings included calf and non-calf groups displaying travelling (n = 1; 25%), milling (n = 1; 25%), and suspected feeding (n = 2; 50%) behaviours. Approximately 4 h of focal following allowed the calculation of short and long breath intervals. Based on our observations, the individuals were suspected of feeding in the area, based on the presence of feeding birds, feeding humpback whales, relatively high time-lagged chlorophyll-a, and observed general behaviours. Our findings indicate that this species may occasionally visit Nicaraguan coastal areas in search of feeding opportunities, and could represent a possible range extension of the Eastern North Pacific stock.

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Bryde’s Whales (Balaenoptera brydei) off the North Coast of São Paulo, Brazil: First Photo-Identification Study

Cited by 7 publications

References 0 publications

Bryde's whales in the North‐East Atlantic: New insights on site fidelity and connectivity between oceanic archipelagos

Bryde's whales in the North‐East Atlantic: New insights on site fidelity and connectivity between oceanic archipelagos

A vessel collision report for Bryde's whales (Balaenoptera brydei) off the northern coast of São Paulo, Brazil

Sightings of Bryde's whale, Balaenoptera edeni, off the Pacific coast of Nicaragua

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