Consumption of a maned sloth (Bradypus torquatus Illiger, 1811) by a tiger shark (Galeocerdo cuvier Péron and LeSueur, 1822) in southeastern Brazil

Miranda, Flávia Regina; Santos, Paloma Marques; Rodrigues, Marcelo Tardelli; Cumplido, Rodrigo; Kersul, María G.

doi:10.31687/saremnms.21.2.2

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Furthermore, tiger sharks were also observed feeding on dead whales in Abrolhos in another study, responsible for 54% of all bites found on carcasses ( Bornatowski et al, 2012b ). Interestingly, the first record concerning the predation of a sloth by a tiger shark was obtained for the South Atlantic, in the state of Rio de Janeiro ( Miranda & Santos, 2021 ), although whether the sloth was preyed on when moving between local islands or if the carcass reached the sea and was then consumed post-mortem could not be determined.…”

Section: Discussionmentioning

confidence: 99%

Almost nothing is known about the tiger shark in South Atlantic waters

Balanin

Hauser‐Davis

Giareta

et al. 2023

PeerJ

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The tiger shark (Galeocerdo cuvier) has been relatively well assessed concerning biology and ecology aspects in both Atlantic and Pacific North America and in Caribbean waters. The amount of data in these regions has led to the species protection under capture quotas and with the creation of sanctuaries. The reality in developing countries, however, is the exact opposite, with scarce information on the species in the southern hemisphere, namely South American and African waters. In these regions, protection measures are insufficient, and studies on tiger shark biology and ecology are scarce, significantly hindering conservation and management efforts. Thus, the aim of this study was to compile scientific literature on the tiger shark in the South Atlantic and discuss the impact of these data (or lack thereof) distributed within a total of ten research categories for guiding management plans. In total, 41 scientific publications on different G. cuvier biology and ecology aspects were obtained. The most studied topics were Feeding Ecology (n = 12), followed by Human Interactions (n = 8), and Movements and Migration (n = 7). Northeastern Brazil (Southwest Atlantic) was the most researched area, probably due to the higher coastal abundance of tiger sharks in this area, alongside a high number of recorded attacks, justifying funding for studies in the region. No studies carried out in other South American or African countries were found. It is important to mention that even though some research topics are relatively well covered, a severe knowledge gap is noted for risk assessments and fisheries management, with a proposition for the implementation of sanctuaries noted. This is, however, particularly worrisome, as the South Atlantic is mostly unexplored in this regard for tiger sharks. It is also important to note how different the attention given to this species is in the North Atlantic when compared to the South region. Lastly, we highlight that the existence of sub-populations, the lack of migratory corridors geographically connecting distinct areas used by the species, and the lack of fisheries statistics on tiger shark landings, all increase the vulnerability of this species in the South Atlantic.

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Section: Discussionmentioning

confidence: 99%

Almost nothing is known about the tiger shark in South Atlantic waters

Balanin

Hauser‐Davis

Giareta

et al. 2023

PeerJ

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“…It exhibits a circumglobal distribution, inhabiting tropical and temperate waters in all oceans [ 25 ], and, similarly to many other sharks from an ecosystem point of view, it plays an essential role as a trophic regulator of ecosystem interaction networks [ 26 ]. Tiger sharks exhibit a very varied diet, composed of a wide variety of marine and terrestrial organisms, in addition to carcasses [ 27 , 28 , 29 ]. The species is ovoviviparous and exhibits a high fecundity, producing between 10 and 82 neonates per posture [ 30 ], although it is late to mature, reaching maturity between seven (males) and eight (females) years old [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

New Occurrences of the Tiger Shark (Galeocerdo cuvier) (Carcharhinidae) off the Coast of Rio de Janeiro, Southeastern Brazil: Seasonality Indications

Aximoff

Cumplido

Rodrigues

et al. 2022

Animals

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The tiger shark Galeocerdo cuvier (Péron & Lesueur, 1822) (Carcharhinidae) is classified as near-threatened along the Brazilian coast, in line with its global categorization. Although Rio de Janeiro, located in southeastern Brazil, is internationally identified as a priority shark conservation area, many shark species, including tiger sharks, are landed by both industrial and artisanal fisheries in this state. However, there is a lack of detailed information on the species capture pressures and records for the state of Rio de Janeiro. Therefore, the aims of this study were to expand the tiger shark record database and to improve upon future conservation and management strategies. Tiger shark records from four coastal Rio de Janeiro regions were obtained by direct observation. The information obtained from fishery colonies/associations, environmental guards, researchers, and scientific articles, totaling 23 records, resulted in an approximately 5-fold increase in the number of tiger shark records off the coast of the state of Rio de Janeiro. A possible seasonality pattern concerning the size of the captured/observed animals was noted, emphasizing the need to consider the coast of Rio de Janeiro as an especially relevant area for at least part of the life history of tiger sharks.

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