Macrofouling of deep-sea instrumentation after three years at 3690m depth in the Charlie Gibbs fracture zone, mid-Atlantic ridge, with emphasis on hydroids (Cnidaria: Hydrozoa)

Blanco, R. Ernesto; Shields, Mark A.; Jamieson, Alan J.

doi:10.1016/j.dsr2.2013.01.019

Cited by 21 publications

(8 citation statements)

References 25 publications

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“…Individuals of Bouillonia spp. have been previously observed on crustacean carapaces, the perisarc tubes of conspecifics, and as an abundant macrofouling organism on experimental installations in the mid‐Atlantic (Blanco et al, 2013; Svoboda et al, 2006). We consider it most likely that B. cornucopia has an extremely patchy distribution and settles opportunistically in biogenic or anthropogenic habitats.…”

Section: Discussionmentioning

confidence: 73%

Reproduction, recruitment, and growth of the Arctic deep‐sea hydroid Bouillonia cornucopia

Meyer-Kaiser

Plowman

Soltwedel

2021

Invertebrate Biology

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Invertebrates in polar and deep‐sea environments that have complex life histories are exposed to unique environmental conditions that may favor non‐pelagic development and K‐strategist reproduction. Although many polar species follow this strategy, the numerically most abundant species tend to have more r‐strategist life‐history characteristics. We deployed artificial substrata over 3 years in the Arctic deep sea and collected hundreds of specimens of the athecate hydroid Bouillonia cornucopia. While this species has previously been described as rare, we report dense, patchy recruitment on artificial substrata, suggesting that B. cornucopia is highly opportunistic. This species has rapid growth compared to other sessile invertebrates in the study area, high fecundity, and continuous reproduction—all characteristics of an r‐selected life history. The species’ gonophores are simple, lacking an obvious spadix or radial canals. We observed nurse cells in histological sections of female gonophores, but no male gonophores were observed. Gonophores break away from the blastostyles in mature specimens and appear to have fertilization envelopes, suggesting that each gonophore is composed of a single oocyte and that embryological development occurs in the water column. Hydroids are typically the first invertebrates to recruit to substrata in the Arctic but are easily overgrown. The opportunistic life histories of B. cornucopia and other hydroids may be adaptive for maintaining populations in the face of high mortality. Our study demonstrates the utility of artificial substrata for collections of otherwise rare opportunistic species.

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Section: Discussionmentioning

confidence: 73%

Reproduction, recruitment, and growth of the Arctic deep‐sea hydroid Bouillonia cornucopia

Meyer-Kaiser

Plowman

Soltwedel

2021

Invertebrate Biology

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“…by Svoboda et al (2006), were found in collections from the Norwegian Sea (69°04.8'-69°05.3'N, 04°41.6'-04°43.7'E, 3213 m and 69°21.9'-69°20.6'N, 10°25.2'-10°28'E, 2966 m), the Laptev Sea (78°16.22'N, 130°02.8'E, 2470 m), and possibly from the Mid-Atlantic Ridge off the Gulf of Guinea. Meanwhile, other unidentified species of Bouillonia have been reported from a deep-sea lander at 3690 m in the Charlie Gibbs fracture zone of the Mid-Atlantic Ridge (Blanco et al 2013), and from photographs of benthic substrates in the Eurasian Central Arctic (Rybakova et al 2019).…”

Section: Remarksmentioning

confidence: 99%

Untitled

2021

Zootaxa

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Fourteen species of hydroids, collected during August 2019 by ROV SuBastian of the Schmidt Ocean Institute, are reported from the Emperor Seamount chain in the western North Pacific Ocean. Two others, Candelabrum sp. and Eudendrium sp., were observed only on videos taken by the ROV. From collections and video observations, eight species of hydroids were found at Jingū Seamount, three at Yomei, Nintoku, and Annei seamounts, and one at Koko Seamount and Hess Rise. At Suiko and Godaigo seamounts, hydroids were seen in videos but they could not be identified. Latebrahydra schulzei, an endobiotic associate of the hexactinellid sponge Walteria flemmingii Schulze, 1886 from Annei Seamount and Hess Rise, is described as a new genus and species tentatively attributed to Hydractiniidae L. Agassiz, 1862. Another new species, Hydractinia galeai, is described from Jingū Seamount. Among its distinctive characters is a zooid termed a sellectozooid, likely serving in both food capture and defence. Hydroids examined from Yomei, Nintoku, and Jingū seamounts are elements of a cold-water fauna occurring in the North Pacific Boreal Bathyal province, while those of Annei and Koko seamounts, and Hess Rise, are part of the biota of the Central North Pacific Bathyal province. Hydroids identified as Bouillonia sp., from Nintoku Seamount, represent the first record of this predominantly deep water tubulariid genus in the North Pacific Ocean. Bonneviella superba Nutting, 1915, from Jingū Seamount, is reported for the first time outside the Aleutian Islands. Bonneviella cf. gracilis Fraser, 1939, known elsewhere only from Dease Strait in the western Canadian Arctic, was also collected on Jingū. In addition to hydroids, medusae of Ptychogastria polaris Allman, 1878 were observed on videos from Nintoku, Jingū, Annei, and Koko seamounts at depths between 2423-1422 m. An unidentified siphonophore was observed near bottom at 2282 m on Nintoku Seamount.

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“…The EOM design seeks to provide self-monitoring capabilities for two reasons: 1) measurement bias and 2) degree of impact by the structures' presence and functioning on the local environment (typical sizes of the main components of observatory systems are likely to be around 3-5 m on each side and 2-4 m in height). Since any observatory will function as an artificial reef and thereby modify the local habitat characteristics that are being measured (Vardaro et al 2007, Blanco et al 2013), more attention is needed to understand the attraction, repulsion, and residency effects of the structures and their operations (e.g. pan-tilt camera motor noise, mobile platform noise, and illumination at imaging) on sessile and motile species and their interactions with each other (e.g.…”

Section: Background: Ecosystem Connectivitymentioning

confidence: 99%

Oceanography and Marine Biology

Hawkins¹,

Allcock²,

Bates³

et al. 2020

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Macrofouling of deep-sea instrumentation after three years at 3690m depth in the Charlie Gibbs fracture zone, mid-Atlantic ridge, with emphasis on hydroids (Cnidaria: Hydrozoa)

Cited by 21 publications

References 25 publications

Reproduction, recruitment, and growth of the Arctic deep‐sea hydroid Bouillonia cornucopia

Reproduction, recruitment, and growth of the Arctic deep‐sea hydroid Bouillonia cornucopia

Untitled

Oceanography and Marine Biology

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