Pelagic Shrimps (Crustacea: Decapoda) from the Southern Ocean between 150°E and 115°E

Twenty species of pelagic shrimps from deep waters from off southern Australia to the Antarctic Ocean are described. One species, Gennadas kempi STEBBING, is firstly recorded from the Antarctic Ocean. Pasiphaea acutifrons BATE and P. scotiae (STEBBING) are fully re-described. P. longispina LENZ and STRUNCK is synonymized with P. scotiae

Résultats des campagnes MUSORSTOM : volume 15

La campagne MUSORSTOM 8, réalisée à bord du N.O. "Alis", s'est déroulée dans les eaux de Vanuatu du 19 septembre au 14 octobre 1994. Cent quatre-vingt-six opération de dragages et de chalutages ont eu lieu dans la zone bathyale supérieure, sur les pentes des îles et sur le sommet du guyot Bougainville. De grandes superficies chalutables ont été découvertes entre 300 et 1000 m de profondeur. La faune benthique est riche, bien diversifiée, mais semble d'une composition très différente de celle de Nouvelle-Calédonie : les Spongiaires et les Stylastérides, en particulier, ne contribuent pas de façon significative à la physionomie des peuplements. (Résumé d'auteur

Characterization of the Demersal Fish Community of a Deep-Sea Radioactive Dump Site (Results of Cruise EPA-7801, R/V ADVANCE II, 21-27 June 1978)

The present report describes the demersal fish fauna collected by otter trawl from RV Advance II on cruise EPA-7801 in the vicinity of a radioactive waste disposal site (R.D.S.) located at a depth of about 3900 m, approximately 200 miles due east of the Virginia coast (Figs. 1, 2). Because the sampling· effort at the R.D.S. was restricted by time and funding, the limited data base accrued from there was analyzed and compared with a much larger data set collected during previous deep-sea trawling studies using the same trawl gear

Characterization of methane-seep communities in a deep-sea area designated for oil and natural gas exploitation off Trinidad and Tobago

Exploration of the deep ocean (>200 m) is taking on added importance as human development encroaches. Despite increasing oil and natural gas exploration and exploitation, the deep ocean of Trinidad and Tobago is almost entirely unknown. The only scientific team to image the deep seafloor within the Trinidad and Tobago Exclusive Economic Zone was from IFREMER in the 1980s. That exploration led to the discovery of the El Pilar methane seeps and associated chemosynthetic communities on the accretionary prism to the east of Trinidad and Tobago. In 2014, the E/V Nautilus, in collaboration with local scientists, visited two previously sampled as well as two unexplored areas of the El Pilar site between 998 and 1,629 m depth using remotely operated vehicles. Eighty-three megafaunal morphospecies from extensive chemosynthetic communities surrounding active methane seepage were observed at four sites. These communities were dominated by megafaunal invertebrates including mussels (Bathymodiolus childressi), shrimp (Alvinocaris cf. muricola), Lamellibrachia sp. 2 tubeworms, and Pachycara caribbaeum. Adjacent to areas of active seepage was an ecotone of suspension feeders including Haplosclerida sponges, stylasterids and Neovermilia serpulids on authigenic carbonates. Beyond this were large Bathymodiolus shell middens. Finally there was either a zone of sparse octocorals and other non-chemosynthetic species likely benefiting from the carbonate substratum and enriched production within the seep habitat, or sedimented inactive areas. This paper highlights these ecologically significant areas and increases the knowledge of the biodiversity of the Trinidad and Tobago deep ocean. Because methane seepage and chemosynthetic communities are related to the presence of extractable oil and gas resources, development of best practices for the conservation of biodiversity in Trinidad and Tobago waters within the context of energy extraction is critical. Potential impacts on benthic communities during oil and gas activities will likely be long lasting and include physical disturbance during drilling among others. Recommendations for the stewardship of these widespread habitats include: (1) seeking international cooperation; (2) holding wider stakeholder discussions; (3) adopting stringent environmental regulations; and (4) increasing deep-sea research to gather crucial baseline data in order to conduct appropriate marine spatial planning with the creation of marine protected areas.Copyright © 2017 Amon, Gobin, Van Dover, Levin, Marsh and Raineault. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms