Cephalopod biodiversity in the vicinity of Bear Seamount, western North Atlantic based on exploratory trawling from 2000 to 2014

Observation of a Gelatinous Octopod, Haliphron atlanticus, along the Southern West Mariana Ridge: A Unique Cephalopod of Continental Slope and Mesopelagic Communities

“…[5][6][7][8][9][10][11][12][13][14][15][16][17] ∘ N along the east side of the West Mariana Ridge (see [50] Tsukamoto et al 2011 for a map of the whole seamount ridge) using expendable conductivity, temperature, and depth profiler probes (X-CTD; Tsurumi-Seiki Co., LTD). Then a shorter transect was made on the west side of the southern part of the ridge (11.5-14 ∘ N).…”

“…Deep-sea species can be collected by bottom trawling [10][11][12] and pelagic trawling near continental margins, islands, or seamounts [13][14][15][16][17]. Some deep-sea squid and octopods have been observed using underwater vehicles, which has provided behavioral and life history information [8,[18][19][20][21][22][23].…”

First records of Geodia demosponges from the New England seamounts, an opportunity to test the use of DNA mini-barcodes on museum specimens

“…The mix of boreal and temperate species in the NES has been noticed for other groups such as fish (Moore et al 2003b(Moore et al , 2003aQuattrini et al 2015), cephalopods (Shea et al 2017) and octocorals (Cairns 2007;Quattrini et al 2015;. Moore et al (2003bMoore et al ( , 2003a found that there is an area of overlap between the boreal fauna and temperate fauna along the slope of Georges Bank.…”

“…Furthermore, the warm-core eddies off the Gulf Stream drop tropical species into the area. As a result, Bear Seamount's fish and cephalopod fauna has a mix of boreal, temperate and tropical species (Moore et al 2003a;Shea et al 2017). Although pelagic animals are obviously very mobile and require different ecological interactions/conditions than sponges, this opens up the possibility of also finding subtropical Geodia species in the NES.…”

Editorial: recent advances in the knowledge of cephalopod biodiversity

“…Farther west, in the Gulf of Mexico, Judkins et al (2017) compared the diversity of midwater cephalopods inferred by using two very different types of midwater trawls, one type a very large net and the other a smaller gear rigged with multiple nets so that separate discrete samples can be collected in a single deployment. Also in the North Atlantic but farther north and closer to the North American continental slope, Shea et al (2017) reported the results of a multi-year study using similar very large nets but, in this case, including both midwater and bottom sampling.…”