Dolphin watching tourists in Fernando de Noronha, Brazil: knowledge and conservation

Tischer, Marina Consuli; Schiavetti, Alexandre; Silva, Flávio José de Lima; Júnior, José Martins da Silva

doi:10.1016/j.ocecoaman.2020.105325

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…5 Sightings frequency of manta ray at Fernando de Noronha Archipelago, considering the period between 2002 and December 2019, summarizing total sightings per month across all the years environments, explaining their tendency to frequent shallow waters with close proximity to deep oceanic regions (Burgess et al 2016), aligning with the conditions occurring at FNA. Other planktivorous species are also sporadically observed in the FNA region, including sicklefin devil rays (M. tarapacana), spinetail devil rays (M. mobular), whale sharks (Rhincodon typus) (Soto 2001), and seasonally humpback whales (Megaptera novaeangliae) (Tischer et al 2020), suggesting local environmental conditions and food availability are favourable for filter-feeding species.…”

Section: Discussionmentioning

confidence: 99%

Sightings trends and behaviour of manta rays in Fernando de Noronha Archipelago, Brazil

Bucair¹,

Venables

Balboni³

et al. 2021

Mar Biodivers Rec

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Despite substantial progress in mobulid research over the past decade, knowledge gaps in manta ray ecology and behaviour remain, particularly in the South Atlantic Ocean. Opportunistic photographic and video records of manta rays collected between 2002 and 2019 at Fernando de Noronha Archipelago (FNA) in northeast Brazil provide evidence to support the year-round use of the region by manta rays (believed to be Mobula cf. birostris). From a total of 130 sighting records, manta rays exhibited feeding behaviour in 36.9% (n = 48) of sightings, indicating that the shallow waters surrounding the archipelago are used as feeding grounds. Approximately half of the records (53.8%) corresponded to identified individuals that were re-sighted repeatedly, using the area in different seasons and for several years. Of the compiled records, 69.2% of sightings were of small individuals (≤3 m disc width). All identified males had undeveloped claspers and females had no visible mating scars, suggesting a juvenile population. Despite being limited to a small local sample, here we present the first report of manta rays at FNA and provide preliminary evidence of feeding behaviour by juvenile manta rays in Brazil. This information contributes to our understanding of the regional distribution and habitat use of manta rays in Brazilian waters.

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Section: Discussionmentioning

confidence: 99%

Sightings trends and behaviour of manta rays in Fernando de Noronha Archipelago, Brazil

Bucair¹,

Venables

Balboni³

et al. 2021

Mar Biodivers Rec

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“…Additional biodiversity could be catalogued in this manner. For example, the spinner dolphin ( Stenella longirostris ) is especially relevant because this species is one of the symbols of Fernando de Noronha and is important for tourism, public engagement, and, more broadly, biodiversity conservation (Tischer et al, 2020). The survey allowed for the identification of teleost biodiversity; both reef fish and pelagic (open water) species were recovered.…”

Section: Discussionmentioning

confidence: 99%

“…Tischer et al, 2020). The survey allowed for the identification of teleost biodiversity; both reef fish and pelagic (open water) species were recovered.…”

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confidence: 99%

Elasmobranchs’ metabarcoding requires a pragmatic approach to reach its promises

Cruz

Sauvage

Chariton

et al. 2022

Preprint

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Human impacts have been eroding marine ecosystems in such a way that biodiversity patterns are changing. Therefore, policies and science-based solutions are indispensable for monitoring threats to the most impacted species. In such effort, the analysis of elasmobranchs' environmental traces via eDNA metabarcoding represent a candidate tool for effective monitoring and conservation that is often advocated to be cost-effective and easily replicated. Here, we tested a realistic approach to monitor future changes through elasmobranchs' metabarcoding with published primers, in which, elasmobranch diversity from the coastal waters of the Fernando de Noronha Archipelago (Brazil) was studied here. We detected a total of three elasmobranch species, namely Hypanus berthalutzae, Ginglymostoma cirratum, and Prionace glauca among numerous other fish species. Even though the technique proved to be a useful tool, some practical constraints were identified, and primarily caused by currently published environmental primers. In order to ensure the broad application of the method, we pointed out feasible adjustments to the problematic parameters based on our survey and other elasmobranch metabarcoding studies. The current drawbacks of the approach need to be considered by managers, conservation actors, and researchers, who are considering this methodology in order to avoid unrealistic promises for the cost incurred.

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“…The area affected by the oil and debris may be larger since there are inaccessible areas in the Marine Park of Fernando de Noronha [9,10], making it impossible to clean these areas. In this Marine Protected Area (MPA) occurs 40 threatened species [8], endemic species (e.g., Elaenia ridleyana, Shaper, 1888 and Vireo gracilirostris, Sharpe, 1890) [11], large concentrations of the spinner (Stenella longirostris, Gray, 1828), and spotted dolphins (S. attenuata, Gray, 1846) [12], and some areas are used by humpback whales (Megaptera novaeangliae, Borowski, 1781) [13] and sea turtles (Chelonia mydas Linnaeus, 1758 and Eretmochelys imbricata Linnaeus, 1766) as breeding or feeding grounds [14]. Furthermore, the affected areas have extensive rhodolith beds [4], pristine seagrass meadows, and the only mangrove on the South Atlantic islands [15][16][17].…”

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confidence: 99%

Oil and plastic spill: 2021 as another challenging year for marine conservation in the South Atlantic Ocean

et al. 2022

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Dolphin watching tourists in Fernando de Noronha, Brazil: knowledge and conservation

Cited by 5 publications

References 31 publications

Sightings trends and behaviour of manta rays in Fernando de Noronha Archipelago, Brazil

Sightings trends and behaviour of manta rays in Fernando de Noronha Archipelago, Brazil

Elasmobranchs’ metabarcoding requires a pragmatic approach to reach its promises

Oil and plastic spill: 2021 as another challenging year for marine conservation in the South Atlantic Ocean

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