Avoiding being dragged away: finding egg cases of <scp><i>Schroederichthys bivius</i></scp> (Chondrichthyes: Scyliorhinidae) associated with benthic invertebrates

Vazquez, Diego Martín; Belleggia, Mauro; Schejter, Laura; Mabragaña, Ezequiel

doi:10.1111/jfb.13490

Cited by 16 publications

(5 citation statements)

References 21 publications

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“…Growing mainly over dead scleractinids and stylasterids, and also on rocky patches, the coral communities studied provided complex three-dimensional structures employed as refuge and substrate by a rich associated fauna. Among other reported organisms, sharks, rays, and fishes could also be using these forests as nurseries and to attach egg cases, as recorded in the nearby waters off Tierra del Fuego and Patagonia by Vazquez, Bellegia, Schejter, and Mabragaña (2018), from samples and observations made on the same research cruises. Among…”

Section: Discussionmentioning

confidence: 95%

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Schejter

Genzano

Gaitán

et al. 2020

Aquatic Conservation

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The characterization of benthic communities at the Burdwood Bank slope (≥200 m depth) is provided, comprising data from the marine protected area (MPA) Namuncurá II (created in December 2018), as well as from some deep bathyal surrounding areas in the Southwest Atlantic Ocean. This information was acquired during two research cruises with RV Puerto Deseado (Argentina) during 2016 and 2017. Marine animal forests were detected in the study area: coral gardens, mainly composed of alcyonaceans, were detected in the south and west of Burdwood Bank (MPA Namuncurá II) and neighbouring areas, whereas pennatulacean aggregations were detected in the north‐west of the plateau. The three‐dimensional structures of live but also dead corals provide substrate and refuge to many associated species. Benthic communities dominated by sponges were also recorded between 200 and 300 m in depth. Six sites that meet the characteristics of vulnerable marine ecosystems (VMEs) are reported. Conservation strategies applied to scarcely known austral Argentinean waters led to the establishment of a pioneer MPA (Namuncurá I). Following the management plan that aimed to establish the biodiversity of Namuncurá I and neighbouring areas, the area of protection has now been enlarged to include the southern slope of the bank (currently Namuncurá II), where marine animal forests were detected, at depths below 200 m. The data presented here provide empirical evidence to support the conservation value of the region.

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Section: Discussionmentioning

confidence: 95%

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Schejter

Genzano

Gaitán

et al. 2020

Aquatic Conservation

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“…Information on egg cases and hatchlings is necessary for accurate species identification throughout all life stages and has been proven to exhibit valuable taxonomic characters in catsharks (Bustamante et al, 2013;Flammang et al, 2007). Furthermore, positive identifications of wild egg cases and hatchlings can provide information on species distribution, habitat usage (Vazquez et al, 2018) and potentially important nursery areas (Flammang et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Description of the egg cases and juvenile colouration in two catsharks of the genus Atelomycterus (Carcharhiniformes: Scyliorhinidae)

O'Neill

Avila²,

White

2020

Journal of Fish Biology

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Descriptions of egg cases and hatchlings of the Bali catshark Atelomycterus baliensis and the Australian marbled catshark Atelomycterus macleayi are provided. Comparisons are made with two of their congeners, banded sand catshark Atelomycterus fasciatus and coral catshark Atelomycterus marmoratus. The Atelomycterus egg cases have the same general morphology, i.e., elongate with anterior and posterior waists, a depressed and truncate anterior end sometimes with attachment fibres, a medially tapered posterior end with two horns sometimes terminating in short, tightly curled tendrils and four respiratory fissures (one at each left corner on opposing sides). Morphometric measurements taken of the egg cases of the four species differed significantly when subjected to multivariate analysis, with unique characters enabling distinction between them. The morphological characters that best distinguished the Atelomycterus species from each other were anterior border width, posterior waist width and posterior case width. Thus, egg case morphology could be used to distinguish the egg cases of the four Atelomycterus species examined, consistent with other studies on scyliorhinid and pentanchid egg cases. Colouration of A. baliensis and A. macleayi juveniles was similar to that of other Atelomycterus juveniles in being pale with a series of dark-brown distinct dorsal saddles along the body, blotches and sometimes with a low number of small dark spots.

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“…Similar 'attachment features' (tendrils and attachment fibres) are present in the egg cases of many catshark species. For example, the egg cases of Schroederichthys bivius (Smith, 1838 in [64]) possess tendrils and attachment fibres which entangle on coral, sponges and algae [65]. More investigation and in situ observation of dichichthyid egg cases are needed to provide better insights into the function of their unique structure.…”

Section: Egg Case Morphologymentioning

confidence: 99%

Dichichthyidae, a New Family of Deepwater Sharks (Carcharhiniformes) from the Indo–West Pacific, with Description of a New Species

White,

Stewart,

O’Neill

et al. 2024

Fishes

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The genus Dichichthys was resurrected for five species previously allocated to the genus Parmaturus in the family Pentanchidae. Supraorbital crests on the chondrocranium distinguish Dichichthys from Parmaturus and other members of the family Pentanchidae. A new family, Dichichthyidae, has been proposed to contain Dichichthys. The sequence of the NADH2 mitochondrial gene confirms the placement of Dichichthys outside of the Pentanchidae family, as well as separate from the Atelomycteridae and Scyliorhinidae families. Dichichthys albimarginatus was described using a holotype collected off the coast of New Caledonia. A second juvenile specimen collected off the coast of Papua New Guinea was tentatively assigned as D. cf. albimarginatus. Dichichthys bigus is known from the holotype collected in the Coral Sea off the coast of Queensland, Australia. A new, parasite-afflicted underwater observation was reported further north of Queensland. The type species Dichichthys melanobranchus, previously only known from juvenile specimens, was redescribed based on adult specimens. Dichichthys nigripalatum is known from the holotype collected off Sumbawa, Indonesia, and a tentatively identified photo record from West Java. Dichichthys satoi n. sp. is described from the West Norfolk Ridge and off the North Island of New Zealand. Members of the genus Dichichthys have unique curved egg cases which have pliable ridges made up of numerous fibres and long coiled tendrils on the posterior end.

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Avoiding being dragged away: finding egg cases of Schroederichthys bivius (Chondrichthyes: Scyliorhinidae) associated with benthic invertebrates

Cited by 16 publications

References 21 publications

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Benthic communities in the Southwest Atlantic Ocean: Conservation value of animal forests at the Burdwood Bank slope

Description of the egg cases and juvenile colouration in two catsharks of the genus Atelomycterus (Carcharhiniformes: Scyliorhinidae)

Dichichthyidae, a New Family of Deepwater Sharks (Carcharhiniformes) from the Indo–West Pacific, with Description of a New Species

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