Anthozoa from the northern Mid-Atlantic Ridge and Charlie-Gibbs Fracture Zone

Molodtsova, Tina N.; Sanamyan, N. P.; Keller, N. B.

doi:10.1080/17451000701821744

Cited by 35 publications

(36 citation statements)

References 11 publications

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“…Hareide and Garnes, 2001;Bergstad et al, 2008;Bergstad et al, 2012) and bathyal invertebrate fauna (Gebruk et al, 2010) was detected between different sections of the northern MAR, but not in demersal fishes within the Azores archipelago (Menezes et al, 2006). Recent surveys on the MAR north of the Azores revealed that most of the alcyonaceans, antipatharians and scleractinians found are shared with the Azores (Molodtsova et al, 2008;Mortensen et al, 2008), but some of the few exceptions were species with northern or antitropical ranges, such as Primnoa resedaeformis, Paragorgia arborea and cf. Stauropathes arctica.…”

Section: Spatial Structurementioning

confidence: 92%

“…Widely distributed throughout the world's oceans, they can be found on continental shelves and margins, edges and slopes of oceanic islands, seamounts, canyons and ridges (e.g. Cairns, 2007;Wareham and Edinger, 2007;Molodtsova et al, 2008;Mortensen et al, 2008;Reveillaud et al, 2008;Baker et al, 2012), especially in areas of high currents and/or enhanced suspended or re-suspended organic matter (Davies et al, 2009;Guinan et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Diversity, distribution and spatial structure of the cold-water coral fauna of the Azores (NE Atlantic)

et al. 2013

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Cold-water corals are widely considered as important structural components of benthic habitats, potentially enhancing local abundance in a variety of fish and invertebrate species. Yet, current knowledge of the taxonomic diversity and distribution patterns of these vulnerable, slow-growing organisms is scarce and fragmented, limiting the effectiveness of spatial management and conservation measures. We have conducted an exhaustive compilation of records of alcyonaceans, antipatharians, scleractinians and stylasterids available through present day to assess the diversity, distribution and spatial structure of coral assemblages in the Azores exclusive economic zone (EEZ). The resulting database comprises 2501 entries concerning historical oceanographic expeditions and other published sources, as well as unpublished data from bottom longline by-catch. Our taxonomic inventory appears to be fairly complete for the explored habitats, accounting for 164 species (79 alcyonaceans, 58 scleractinians, 18 antipatharians and 9 stylasterids), nine of which were documented for the first time. The Azores EEZ harbours a mixed coral fauna with several zoogeographic origins, showing the closest affinity with the Lusitanian–Mediterranean region. Very few apparent endemics were found (14%), and only in part supported by consistent sampling. Coral diversity is particularly high between 300 and 900 m depths, in areas recognized as traditional fishing grounds or exploitable fish habitat within the 100-mile limit of the EEZ. The composition of coral assemblages shows significant geographical structure among longitudinal sections of the study area at comparable depths (100–1500 m). There is no evidence of a possible role of the Mid-Atlantic Ridge or latitudinal effects underlying this pattern, which suggests that it may instead reflect assemblage variability among features. Stronger changes in species composition were found along the bathymetric gradient. Notwithstanding the mix of partially overlapping steno- and eurybathic species that characterize the vertical distribution of corals, there is a distinct transition from shallow (100–600 m) to intermediate (600–1000 m) depths. The analysis presented here constitutes a valuable contribution for efficient conservation policies of coral-associated vulnerable marine ecosystems and their sustainable use as fishing areas

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Section: Spatial Structurementioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Diversity, distribution and spatial structure of the cold-water coral fauna of the Azores (NE Atlantic)

et al. 2013

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“…Molodtsova, 2006;Molodtsova et al, 2008;Morris et al, 2012;. Most Northeast Atlantic deep-sea coral records come from steeply sloping seamounts, oceanic islands and along the continental slope, with antipatharians being the third most commonly recorded group, after alcyonaceans and scleractinians Hall-Spencer et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…However, this did not include Trissopathes tetracrada Opresko, 2003(Opresko 2003a and Allopathes denhartogi Opresko, 2003(Opresko 2003b) from Cape Verde. Further on, Schizopathes affinis Brook, 1889 from the MidAtlantic ridge (Molodtsova, 2008), Leiopathes montana Molodtsova, 2011 from the Great Meteor (Molodtsova, 2011), as well as Leiopathes sp. A and Distichopathes sp.…”

Section: Introductionmentioning

confidence: 99%

New species of Heteropathes (Anthozoa: Antipatharia) expands genus distribution to the NE Atlantic

Matos

Braga-Henriques

Santos

et al. 2014

Zootaxa

710

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Heteropathes opreski, a new antipatharian species from the northern border of the Oceanographer Fracture Zone is here described and illustrated. An emended diagnosis of the genus and a dichotomous key containing the four Heteropathes species are presented. This species is unique in that it forms smaller colonies compared to the other species in the genus, with some of the lateral pinnules presenting a small ramified subpinnule. Additionally, the polypar spines found on the lateral pinnules are the highest so far recorded in the genus. This record greatly expands the known distribution of this genus, as it was not previously reported to occur in the Northeastern Atlantic.

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“…Castro & Medeiros (2001) and Castro et al (2006) recorded 13 species of pennatulaceans, belonging to 6 families, along the Brazilian coast. Seven of these recorded species came from depths below 200 m. The sea pen Anthoptilum murrayi Kölliker 1880 has been reported from the shelf to the upper continental slope of the North Atlantic, the northern Mid-Atlantic Ridge, Faraday Seamount, the Indian Ocean and waters around New Zealand and Australia (Jungersen 1904, Thomson & Henderson 1906, Deichmann 1936, Cryer et al 2002, McFadden et al 2006, Molodtsova et al 2008, Mortensen et al 2008, Cairns et al 2009). The first specimens from the South Atlantic were collected off Brazil, from 13°to 22°S (Pinto 2008).…”

Section: Introductionmentioning

confidence: 99%

Reproductive biology of the deep-sea pennatulacean Anthoptilum murrayi (Cnidaria, Octocorallia)

Pires¹,

Castro²,

Silva³

2009

Mar. Ecol. Prog. Ser.

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Anthoptilum murrayi has been reported from the North Atlantic, northern Mid-Atlantic Ridge, Indian Ocean and in waters around New Zealand and Australia. Recently, this species was also recorded in deep waters off Brazil, southwestern Atlantic. It was from this region (13°to 22°S) that specimens were collected, in 1300 to 1799 m, to determine the reproductive biology of A. murrayi using histological methods. The colony polyparium was divided into 3 zones (distal, medial and basal) to evaluate differences in gamete development between zones; dissected polyps were examined from the 3 zones to estimate fecundity. The species appears to display a continuous and long breeding activity rather than any seasonal reproductive pattern. Most oocytes were in the earliest stages of development and basal polyps presented the highest frequency of small eggs. The large mature oocytes (up to 1200 µm) indicate that A. murrayi produces lecithotrophic larvae. Females had 0 to 90 oocytes per polyp and 25 713 to 35 918 oocytes per colony. Male colonies of similar size to the female samples were shown to have 6 to 76 cysts per polyp and 14 014 to 27 019 cysts per colony. A. murrayi is a sessile gonochoric species with a 1:1 sex ratio and is most likely a broadcast spawner. The species has high fecundity, large eggs that could represent larger targets for sperm, primitive spermatophores, as well as a large number of polyps per colony. These factors, along with a patchy distribution, would enhance the chance of fertilization for A. murrayi and may guarantee a successful reproductive strategy for this species.

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Anthozoa from the northern Mid-Atlantic Ridge and Charlie-Gibbs Fracture Zone

Cited by 35 publications

References 11 publications

Diversity, distribution and spatial structure of the cold-water coral fauna of the Azores (NE Atlantic)

Diversity, distribution and spatial structure of the cold-water coral fauna of the Azores (NE Atlantic)

New species of Heteropathes (Anthozoa: Antipatharia) expands genus distribution to the NE Atlantic

Reproductive biology of the deep-sea pennatulacean Anthoptilum murrayi (Cnidaria, Octocorallia)

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