2017
DOI: 10.3389/fmars.2017.00354
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Review of the Diversity, Ecology, and Conservation of Elasmobranchs in the Azores Region, Mid-North Atlantic

Abstract: A vulnerable species group, such as, the elasmobranchs, in a data-deficient context presents a complicated management problem. Evidence suggests that the Azores islands, a remote archipelago on the Mid-Atlantic Ridge, serve essential functions in the life-history of species across taxa. The diversity of marine resources within its EEZ are exploited by local to international fleets, and the full extent of fishing pressure can often be underestimated. Although sharks and rays appear to be of minor importance in … Show more

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Cited by 27 publications
(22 citation statements)
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References 91 publications
(133 reference statements)
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“…Large bony and cartilaginous fishes are another key component of the megafauna ensemble occurring in the region, including six tropical and temperate tuna, five billfishes/spearfishes, five sun/moon fishes, three large groupers (one endemic to Macaronesia) and over 60 species of benthic and pelagic sharks and rays (Porteiro et al, 2010;Das and Afonso, 2017) (Table 1). In the case of tuna/billfishes and pelagic/deepsea sharks, this represents a relatively high diversity (e.g., Das and Afonso, 2017).…”
Section: A Mid-atlantic Hub For Oceanic Megafaunamentioning
confidence: 99%
See 1 more Smart Citation
“…Large bony and cartilaginous fishes are another key component of the megafauna ensemble occurring in the region, including six tropical and temperate tuna, five billfishes/spearfishes, five sun/moon fishes, three large groupers (one endemic to Macaronesia) and over 60 species of benthic and pelagic sharks and rays (Porteiro et al, 2010;Das and Afonso, 2017) (Table 1). In the case of tuna/billfishes and pelagic/deepsea sharks, this represents a relatively high diversity (e.g., Das and Afonso, 2017).…”
Section: A Mid-atlantic Hub For Oceanic Megafaunamentioning
confidence: 99%
“…Large bony and cartilaginous fishes are another key component of the megafauna ensemble occurring in the region, including six tropical and temperate tuna, five billfishes/spearfishes, five sun/moon fishes, three large groupers (one endemic to Macaronesia) and over 60 species of benthic and pelagic sharks and rays (Porteiro et al, 2010;Das and Afonso, 2017) (Table 1). In the case of tuna/billfishes and pelagic/deepsea sharks, this represents a relatively high diversity (e.g., Das and Afonso, 2017). Some are mostly visitors during the warmer season, i.e., June to November (e.g., tropical tuna and billfishes, mobulid rays, whale shark), but others apparently use the area throughout their lives (e.g., groupers, several deepwater sharks, Afonso et al, 2011;Reid et al, 2019) or as a long-term nursery ground for juvenile growth (e.g., blue, smooth hammerhead and tope sharks, Afonso et al, 2014b).…”
Section: A Mid-atlantic Hub For Oceanic Megafaunamentioning
confidence: 99%
“…Given the remoteness of the Azores archipelago, the great depths that surround it, the fact that C. monstrosa primarily occupies the upper slope and the high degree of misidentification in past records leads to the conclusion that the second scenario is more plausible. This study therefore suggests the replacement of C. monstrosa with C. opalescens in the checklist of elasmobranchs for Azores given by Das and Afonso (2017), with a total number of four confirmed Chimaera species reported for the region. In the Azores, because of the ban on trawling and low capture of chimerids using baited hooks, the populations of these vulnerable species (i.e., long life span and late maturation) are less susceptible to fishing, an important aspect for the conservation of these species in the region.…”
Section: Historical Records Of C Monstrosa In the Azoresmentioning
confidence: 68%
“…Handlining provides higher flexibility and adaptability to fishing conditions than longlining. Deep-water sharks are rarely caught with handlines and are more likely to survive after release, which is positive in terms of conservation given the high vulnerability of those species (Das and Afonso, 2017;Garcia et al, 2008). From an economic perspective, the advantages of converting to handlining are reduced costs (employment/crew, bait, number of hooks, fuel, etc.)…”
Section: Resultsmentioning
confidence: 99%