First records of Chimaera opalescens (Holocephali: Chimaeriformes: Chimaeridae) from Madeira and north-west African Coast

Freitas, Mafalda; Vieira, Sofia Lerche; Costa, Ana Luisa Dayrell G; Delgado, J. M. P. Q.; Biscoito, Manuel; González, José A.

doi:10.3750/aiep/02114

Cited by 5 publications

(9 citation statements)

References 8 publications

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“…opalescens specimens were captured at depths >800 m, which is within the reported depth range for the species (Freitas et al, 2017;Holt et al, 2013).…”

Section: Historical Records Of C Monstrosa In the Azoressupporting

confidence: 64%

“…(2016), Freitas et al . (2017) and this study (Azores). The dashed area in Rockall represents several specimens reported by Holt et al .…”

Section: Methodssupporting

confidence: 52%

“…Genetically, three of the Azorean specimens shared haplotypes with individuals captured off Ireland (Luchetti et al ., 2011), whereas the other three shared a new haplotype. Where depth was recorded ( i.e ., for all but one specimen), the C. opalescens specimens were captured at depths >800 m, which is within the reported depth range for the species (Freitas et al ., 2017; Holt et al ., 2013).…”

Section: Discussionmentioning

confidence: 99%

“…(a) Known distribution to date of Chimaera opalescens. Red dots report on confirmed specimens from: Luchetti et al (2011), Vieira and Cunha (2014), Møller et al (2004), Bañon et al (2016), Freitas et al (2017)…”

Section: Sampling and Molecular Analyses On The Collected Specimensmentioning

confidence: 99%

“…In contrast, C. opalescens was first described as a new species in 2011, along the slope off the British Isles and France (Luchetti et al ., 2011). Additional records were obtained from Greenland, Gorringe and Galicia banks (Bañon et al ., 2016; Luchetti et al ., 2011; Vieira & Cunha, 2014), and more recently from Madeira and the north‐west African slopes (Freitas et al ., 2017). The two species are distinguished by body colour, iris, unpaired fins and digestive canal.…”

Section: Introductionmentioning

confidence: 99%

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First record of the opal chimaera, Chimaera opalescens (Holocephali: Chimaeridae) and revision of the occurrence of the rabbitfish Chimaera monstrosa in the Azores waters

Catarino¹,

Jakobsen²,

Jakobsen³

et al. 2020

Journal of Fish Biology

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The presence of the opal chimaera, Chimaera opalescens, is reported for the first time in the deep waters of the Azores, with the capture of four specimens by fishermen and the video recording of an additional five individuals. Species identification was supported by the 646 bp sequenced fragment of the mitochondrial gene cytochrome oxidase subunit I. Because C. opalescens is a recently recognised species that had been recurrently misidentified as rabbitfish, Chimaera monstrosa, the historical data of C. monstrosa in the Azores were reviewed to assess the possible presence of both Chimaera species in the region. Although several authors have reported the occurrence of C. monstrosa in the Azorean waters since the 1800s, the majority of these are based on only three specimens caught during the late 1800s. The investigation performed using literature and examination of the museum specimens still available concluded that the most likely scenario is that C. monstrosa is absent from the Azores and past records of that species in the region are most likely misidentifications of C. opalescens.

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“…opalescens specimens were captured at depths >800 m, which is within the reported depth range for the species (Freitas et al, 2017;Holt et al, 2013).…”

Section: Historical Records Of C Monstrosa In the Azoressupporting

confidence: 64%

“…(2016), Freitas et al . (2017) and this study (Azores). The dashed area in Rockall represents several specimens reported by Holt et al .…”

Section: Methodssupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Section: Sampling and Molecular Analyses On The Collected Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

First record of the opal chimaera, Chimaera opalescens (Holocephali: Chimaeridae) and revision of the occurrence of the rabbitfish Chimaera monstrosa in the Azores waters

Catarino¹,

Jakobsen²,

Jakobsen³

et al. 2020

Journal of Fish Biology

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A mitochondrial genome assembly of the opal chimaera, Chimaera opalescens Luchetti, Iglésias et Sellos 2011, using PacBio HiFi long reads

Vilas-Arrondo

Gomes‐dos‐Santos

Pérez

et al. 2022

Mitochondrial DNA Part B

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Chondrichthyans (sharks, rays and chimeras) are a fascinating and highly vulnerable group of early branching gnathostomes. However, they remain comparatively poorly sampled from the point of view of molecular resources, with deep water taxa being particularly data deficient. The development of long-read sequencing technologies enables the analysis of phylogenetic relationships through a precise and reliable assembly of complete mtDNA genomes. The sequencing and characterization of the complete mitogenome of the opal chimera Chimera opalescens Luchetti, Iglésias et Sellos 2011, using the long-read technique PacBio HiFi is presented. The entire mitogenome was 23,411 bp long and shows the same overall content, i.e. 13 protein-coding genes, 22 transfer RNA and 2 ribosomal RNA genes, as all other examined Chondrichthyan mitogenomes. Phylogenetic reconstructions using all available Chondrichthyan mitogenomes, including 11 Holocephali (chimeras and ratfishes), places C. opalescens within the Chimaeridae family. Furthermore, the results reinforce previous findings, showing the genus Chimera as paraphyletic and thus highlighting the need to expand molecular approaches in this group of cartilaginous fishes.

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Ghosts of the deep – Biodiversity, fisheries, and extinction risk of ghost sharks

et al. 2020

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Ghost sharks (subclass Holocephali) remain a largely data‐poor group of cartilaginous fishes. The general paucity of attention may partially be related to identification and unresolved taxonomic issues, occurrence in the deep oceans, and their low value and interest in fisheries (which some notable exceptions). Here, we synthesize and assess the extinction risk of all known extant ghost sharks (52 species) by applying the IUCN Red List of Threatened Species Categories and Criteria. Ghost sharks have a low proportion of threatened (8%) and Near Threatened (8%) species, with most species (69%) assessed as Least Concern. The group still exhibits some data deficiency (15%), and biological information is lacking for most species. Endemism is high, with 37% of species known from only one location or one country. Species richness was highest in the Northeast Atlantic, off the northwest coast of Africa (Morocco to Mauritania), the East China Sea, New Zealand and off the northwest coast of South America (Ecuador and Peru). Ghost sharks are predominately taken as by‐catch, but some targeted fishing and/or retention for the liver oil trade occurs. Species‐specific reporting, monitoring and management are required to assess population trends, and further investigation is needed on trade and use, particularly for higher risk species including the sicklefin chimaeras (genus Neoharriotta) and the American Elephantfish (Callorhynchus callorhynchus, Callorhinidae).

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First records of Chimaera opalescens (Holocephali: Chimaeriformes: Chimaeridae) from Madeira and north-west African Coast

Cited by 5 publications

References 8 publications

First record of the opal chimaera, Chimaera opalescens (Holocephali: Chimaeridae) and revision of the occurrence of the rabbitfish Chimaera monstrosa in the Azores waters

First record of the opal chimaera, Chimaera opalescens (Holocephali: Chimaeridae) and revision of the occurrence of the rabbitfish Chimaera monstrosa in the Azores waters

A mitochondrial genome assembly of the opal chimaera, Chimaera opalescens Luchetti, Iglésias et Sellos 2011, using PacBio HiFi long reads

Ghosts of the deep – Biodiversity, fisheries, and extinction risk of ghost sharks

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