Mesophotic fishes of the Abrolhos Shelf, the largest reef ecosystem in the South Atlantic

Simon, Thiony; Pinheiro, Hudson T.; Moura, Rodrigo L.; Carvalho-Filho, Alfredo; Rocha, Luiz A.; Martins, Agnaldo Silva; Mazzei, Eric F.; Francini‐Filho, Ronaldo B.; Amado‐Filho, Gilberto M.; Joyeux, Jean‐Christophe

doi:10.1111/jfb.12967

Cited by 46 publications

(30 citation statements)

References 28 publications

(40 reference statements)

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“…Thus, it appears that the low sedimentary inflow in the Aracruz and adjacent shelves facilitates the colonization of vast rhodolith beds, conversely to the inner shelf adjacent to the Doce River. Recent studies highlight the presence of 74 fish species in mesophotic rhodoliths beds, including an endemic fish genus and many endangered species [42]. At least 18 commercially important species are associated with this habitat, most of them captured by lines and longlines, such as porgies (Pagrus pagrus and Calamus sp.…”

Section: Discussionmentioning

confidence: 99%

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Seabed Morphology and Sedimentary Regimes defining Fishing Grounds along the Eastern Brazilian Shelf

et al. 2018

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Shelf morphology and sedimentary regimes are influenced by processes operating at different temporal and spatial scales and are important records of sea level changes and sediment supply and/or carbonate production. The northern continental shelf of Espírito Santo (Brazil) contains evidence of different sedimentary regimes that distribute diverse and complex marine habitats. Herein, seabed morphology, acoustic images of the seafloor (side scan sonar and sub-bottom profiler), and sediment samples were used to investigate the influence of sedimentary regimes on physical marine habitat distribution. Seabed mapping is also integrated with available data on fisheries to understand the influence of shelf morphology and sedimentology in the usage of distinct fishing gears. The results indicate five morpho-sedimentary facies: terrigenous mud, terrigenous sand, rhodolith beds, carbonate gravel with rhodoliths, and hardground. Through an integrated analysis of the geomorphology and sedimentary distribution, two morpho-sedimentary domains were identified: a sediment-fed shelf adjacent to the Doce River associated with a major mud depocenter and a delta front morphology characterized by gentle slopes and low terrain ruggedness, and a sediment-starved shelf dominated by carbonate sedimentation showing an irregular morphology associated with higher slopes and terrain ruggedness. These contrasting morpho-sedimentary domains are a result of sedimentary responses to sea level fluctuation during Late Quaternary, specially, during the deglaciation processes after the Last Glacial Maximum. The morphological and sedimentary contrasts along the area define the physical habitat distribution. The sediment supply regime area is associated with a terrigenous fine/muddy sedimentation bed, which control the local morphology and favors coastal and delta front progradation. This physical habitat is a well-known shrimp-fishing ground where intense trawling takes place, as well as gillnet fisheries targeting weakfish and croakers. The accommodation regime or low sediment influx area is characterized by carbonate sedimentation associated with hardgrounds and rhodolith beds. In contrast, this physical habitat with scarce sediment supply, facilitates extensive benthic colonization by crustose coralline algae (CCA), which is primarily associated to line fisheries, longlines, and spearfishing. Rhodoliths show a high diversity of CCA and the occurrence of an endemic kelp species. Long-term processes such as relative sea level fluctuations and sediment supply are a legacy for the distribution of benthic

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Section: Discussionmentioning

confidence: 99%

“…), snappers (Lutjanus buccanella, L. cyanopterus and Ocyurus chrysurus), groupers (six species), and amberjacks (Seriola spp.) [42].…”

Section: Discussionmentioning

confidence: 99%

Seabed Morphology and Sedimentary Regimes defining Fishing Grounds along the Eastern Brazilian Shelf

et al. 2018

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“…For example, another Anthiadinae, Anthiasasperilinguis Günther 1859, is widespread along deep reefs of the western Atlantic (usually below the MCEs), and is also found at St. Paul’s Rocks, where it shows a slight genetic divergence (Anderson et al 2017). The few studies of deep reefs in the southwestern Atlantic are mostly restrict to shallower mesophotic coral ecosystems between 30 and 80m depth (Pinheiro et al 2015, Rosa et al 2016, Simon et al 2016), what limits the understanding of the biogeography of deep fishes in the province.…”

Section: Discussionmentioning

confidence: 99%

Tosanoides aphrodite, a new species from mesophotic coral ecosystems of St. Paul’s Rocks, Mid Atlantic Ridge (Perciformes, Serranidae, Anthiadinae)

Pinheiro¹,

Rocha²,

Rocha³

2018

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During a recent expedition to St. Paul’s Rocks, Atlantic Ocean, a distinctive and previously unknown species of Anthiadinae was collected at a depth of 120 m. A genetic analysis indicated the undescribed species is a member of the genus Tosanoides, which was only known to occur in the Pacific Ocean. This new taxon is distinguishable from all other Tosanoides species by the following combination of characters: soft dorsal fin rays 15–16; anal fin rays 9; ventral scale rows 9–10; last dorsal spine the longest (instead first through fourth). Here Tosanoidesaphroditesp. n. is described and illustrated, only known from St. Paul’s Rocks.

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“…As trawling is limited to bottoms lacking structural complexity, information about these reef fishes is scarce. Technical SCUBA and rebreather diving using mixed gases to explore lower MCEs (60 to 150 m) is enabling new records of reef fishes around the globe (Kane et al 2014, Wagner et al 2014, Pinheiro et al 2015, Simon et al 2016), as well as the discovery of several new species (Anderson et al 2016, Pyle and Kosaki 2016, Pyle et al 2016). The expansion of scientific deep diving is slowly filling our knowledge gap of the diversity and distribution of most MCE taxa, including Roa species.…”

Section: Discussionmentioning

confidence: 99%

Roa rumsfeldi, a new butterflyfish (Teleostei, Chaetodontidae) from mesophotic coral ecosystems of the Philippines

Rocha

Pinheiro

Wandell

et al. 2017

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A new species of the butterflyfish genus Roa is herein described from the Verde Island Passage in the Philippines, West Pacific Ocean. Roa rumsfeldi sp. n. was found on mesophotic coral ecosystems at Puerto Galera and Batangas, and sampled through technical mixed-gas rebreather diving at 100–130 m depth. This represents the fifth known species of Roa. The main differences between Roa rumsfeldi sp. n. and its congeners are the lower number of pored scales in the lateral line, longer snout, longer caudal peduncle, shorter caudal fin, pelvic fin color (dark first spine vs. white in all other Roa), and genetics (8.4% divergence from its closest relative Roa modesta in the mitochondrial COI gene). Roa spp. are usually seen in pairs, but the two specimens we collected were solitary individuals. We have kept one of the specimens alive in the California Academy of Sciences’ Twilight Zone exhibit for more than one year, where it thrives and is feeding on a variety of dried and fresh food.

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Mesophotic fishes of the Abrolhos Shelf, the largest reef ecosystem in the South Atlantic

Cited by 46 publications

References 28 publications

Seabed Morphology and Sedimentary Regimes defining Fishing Grounds along the Eastern Brazilian Shelf

Seabed Morphology and Sedimentary Regimes defining Fishing Grounds along the Eastern Brazilian Shelf

Tosanoides aphrodite, a new species from mesophotic coral ecosystems of St. Paul’s Rocks, Mid Atlantic Ridge (Perciformes, Serranidae, Anthiadinae)

Roa rumsfeldi, a new butterflyfish (Teleostei, Chaetodontidae) from mesophotic coral ecosystems of the Philippines

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