Bryde's whale (Cetartiodactyla: Balaenopteridae) occurrence and movements in coastal areas of southeastern Brazil

Lodi, Liliane; Tardin, Rodrigo H.; Hetzel, Bia; Maciel, Israel de Sá; Figueiredo, Luciana Duarte de; Simão, Sheila M.

doi:10.1590/s1984-46702015000200009

Cited by 22 publications

(16 citation statements)

References 10 publications

(7 reference statements)

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“…In this study, the data on Bryde's whales in the Gulf of Thailand were not included in the MCP scenarios because of a lack of statistically representative occurrence data. Unlike the Indo‐Pacific humpback dolphins and Irrawaddy dolphins that utilize inshore and estuarine waters as their primary habitats (Jutapruet et al., 2015, 2017; Wu et al., 2017 ) , the Bryde's whale is a pelagic baleen whale species with a wide migratory range (Best, 2001; Lodi et al., 2015), although its feeding habitats can be near shorelines (Chen et al., 2019; Iwata et al., 2017; Thongsukdee et al., 2014). The gap in the presented HPP configuration for coastal biodiversity features does not indicate inadequacy in adopting marine megafauna as MCP surrogates but, instead, highlights the importance of considering species niches when selecting MCP surrogates (Barton et al., 2020).…”

Section: Discussionmentioning

confidence: 99%

Mapping habitat protection priority over a marine ecoregion under information gaps

Kittiwattanawong

Junchompoo²,

Sakornwimon³

et al. 2020

Diversity and Distributions

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Section: Discussionmentioning

confidence: 99%

Mapping habitat protection priority over a marine ecoregion under information gaps

Kittiwattanawong

Junchompoo²,

Sakornwimon³

et al. 2020

Diversity and Distributions

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“…Cultures are group-typical behavior patterns shared by members of a community that rely on socially learned and transmitted information [8]. Because tread-water feeding has never been observed in Bryde's whales in any other area [9,10], and the whales show a grouptypical behavior pattern in the upper Gulf of Thailand, we speculate that this feeding pattern might be a cultural behavior. Lead Contact.…”

Section: Tread-water Feeding Of Bryde's Whalesmentioning

confidence: 93%

Tread-water feeding of Bryde’s whales

Iwata

Akamatsu

Thongsukdee³

et al. 2017

Current Biology

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Many previous studies have shown that rorqual whales (Balaenopteridae), including the blue whale (Balaenoptera musculus), fin whale (B. physalus), sei whale (B. borealis), Bryde's whale (B. edeni), minke whale (B. acutorostrata), and humpback whale (Megaptera novaeangliae), employ a strategy called lunge feeding to capture a large amount of krill and/or fish for nourishment [1]. Lunge feeding entails a high energetic cost due to the drag created by an open mouth at high speeds [1,2]. In the upper Gulf of Thailand, Bryde's whales, which feed on small fish species [3], predominantly anchovies, demonstrated a range of feeding behaviors such as oblique, vertical, and lateral lunging. Moreover, they displayed a novel head-lifting feeding behavior characterized by holding the vertical posture for several seconds with an open mouth at the water surface. This study describes the head-lifting feeding by Bryde's whales, which is distinct from the typical lunge feeding of rorqual whales. Whales showing this behavior were observed on 58 occasions, involving 31 whales and including eight adult-calf pairs. Whales caught their prey using a series of coordinated movements: (i) lifting the head above the water with a closed mouth, (ii) opening the mouth until the lower jaw contacted the sea surface, which created a current of water flowing into the mouth, (iii) holding their position for several seconds, (iv) waiting for the prey to enter the mouth, and (v) closing the mouth and engulfing the prey underwater (Figure 1A-F, Movie S1 in Supplemental Information published with this article online). When a whale kept its upper jaw above the sea surface, many anchovies in the targeted shoal appeared to lose orientation and flowed passively into the mouth of the whale by the current created by the lower mandible breaking the surface of the water. We measured the duration of feeding events when the whales had a wide-open mouth mostly above the sea surface. The mean and maximum feeding durations were 14.5 ± 5.4 (SD; n = 58 events) and 32 s, respectively. Deployment of animal-borne data loggers yielded approximately 44 minutes of recordings from a single whale. The acceleration data showed that stroke rates, including tail beat and whole-body movements during feeding, were faster (approximately 0.7 s cycle) than during a cruising swim (approximately 3 s cycle) (Figure 1G). The swimming speed was lower than that in the stall speed (0.2 m s) of the device during the feeding phase, suggesting that thrust force was used to hold the head up and to stabilize body posture (Figure 1G). Stable positioning using the fluke and flipper was confirmed by video data for both the downward and upward direction of the whale (Figure S1). According to the visual and behavioral data, we named the head-lifting feeding as 'tread-water feeding'. Generally, all species of baleen whale, including rorqual whales, show active chasing and feeding, i.e., skimming, suction, and engulfing with lunging [1]. Tread-water feeding is considered passive feeding as compared wit...

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“…Longer migratory movements of whales of approximately 2,000-3,500 km in distance have been reported off the west coast of South Africa (Best, 2001). Differences in residency patterns of whales suggest there are migratory movements at several sites, but the distances remain unknown (Alves et al, 2010;Penry et al, 2011) and may cover only short distances of hundreds of kilometers (Wiseman, 2008;Lodi et al, 2015). This may be in response to prey movements, as found off Brazil, Venezuela and the Gulf of California (Notarbartolo di Sciara, 1983;Tershy, 1992;Zerbini et al, 1997).…”

Section: Movementmentioning

confidence: 99%

“…Balaenopteridae including Bryde's whales employ a foraging strategy, lunge feeding, characterized by the engulfment of a large volume of water at high speed and subsequent filtering with the mouth closed (Goldbogen et al, 2017). Bryde's whales commonly use lunge feeding behaviors throughout their range (e.g., Miyazaki and Wada, 1978;Best et al, 1984;Tershy, 1992;Anderson, 2005;Steiner et al, 2008;Alves et al, 2010;Penry et al, 2011;Lodi et al, 2015;Iwata et al, 2017). They have a broad diet of pelagic and mesopelagic fishes, squids, krill, and other zooplankton which varies by location (Olsen, 1913;Notarbartolo di Sciara, 1983;Best et al, 1984;Tershy, 1992;Best, 2001;Anderson, 2005;Murase et al, 2007;Gonçalves et al, 2015;Lodi et al, 2015;Iwata et al, 2017;Izadi, 2018;Kato and Perrin, 2018).…”

Section: Plasticity In Foraging Behaviorsmentioning

confidence: 99%

Future Directions in Research on Bryde's Whales

et al. 2018

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One of the lesser known species of baleen whales, the Bryde's whale, also known as Eden's whale (Balaenoptera edeni edeni and B. edeni brydei), although hunted as part of a North Pacific Japanese research programme 1 , was not heavily exploited by commercial whaling and remains a data deficient species. Their taxonomic status is not fully resolved and they are often mistaken for other species leading to uncertainty about their true distribution, behavior and conservation status. Some populations are critically endangered, whilst others are small but have high genetic diversity suggesting wider connectivity. The species' unpredictable coastal and offshore global distribution throughout warm-temperate waters has led to populations with unknown genetic variation, and facing different threats. Few areas are well-studied, but each study reveals often contrasting movement patterns, foraging strategies, and vocal repertoires; there are considerable knowledge gaps for Bryde's whales. There are few Bryde's populations with abundance estimates but they typically number in the mid-to high-hundreds of individuals, with other populations small, <100 mature individuals, and exposed to high levels of anthropogenic impacts. Future research should focus on understanding the diversity within and between populations. Here, we suggest an integrative, comparative approach toward future work on Bryde's whales, including acoustic monitoring, trophic interactions, telemetry tools, understanding their novel behaviors, and resolving their species status. This will inform conservation management of this unusual species of whale vulnerable to anthropogenic impacts.

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Bryde's whale (Cetartiodactyla: Balaenopteridae) occurrence and movements in coastal areas of southeastern Brazil

Cited by 22 publications

References 10 publications

Mapping habitat protection priority over a marine ecoregion under information gaps

Mapping habitat protection priority over a marine ecoregion under information gaps

Tread-water feeding of Bryde’s whales

Future Directions in Research on Bryde's Whales

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