partida: 2015-08-19     chegada: 2015-09-10

equipa

Cientista Responsável/Chief Scientist: Diana Catarino (IMAR, MARE ), 1ª parte/ 1st leg, Alexandra Rosa (IMAR, MARE ), 2ª parte/ 2nd leg | Restante equipa técnico-científica/Remaining scientific team: Íris Sampaio, Sérgio Gomes, Gonçalo Graça (IMAR, MARE ), Neide Lagarto, João Pereira, Pedro da Conceição, Teresa Moura, Delfina Freitas (IPMA )

rota

Horta, Gettysburg, Portimão, Ormonde, Portimão

Descrição

The cruise ARQBIOMETORE-44-V15 on board the R/V Arquipélago took place from August 19 to September 10, 2015. The full cruise report is available here.

The cruise aimed to collect data on the demersal and deep-sea fish species and invertebrates, in order to contribute to increase knowledge of biodiversity and functioning of the deep-sea ecosystem of the Gorringe bank. In this survey the areas sampled were the Gettysburg and the Ormonde seamounts as well as an area between them. 

Two types of fishing gear were used, the bottom longline targeting the demersal and deep water fish species, and the traps mainly targeting benthic and epi-benthic invertebrate species. Taking into account the species selectivity of each of the sampling methods, and in order to catch the maximum possible number of species, two different types of longlines and traps were used. In the case of the longlines the “stone-buoy-slim” (LLA) longline was used in shallower depths (up to ± 1200 m) and the same longline but with a slight modification (LLB) at deeper depths (± 1200 - 2000 m). The two types of traps used were those named as “Camarão” (C) which float and fish slightly above the seafloor, and MMF traps (locally named “Josué”) (J) which are benthic and rest on the bottom. Additionally, 7 CTD deployments to collect hydrographic data- between 556 and 1867 m depth- and 8 deployments of the “Baited Video Image Lander” (BVIL) - between 51 and 1050 m depth- were made, to complement the fish species diversity data and for other analysis. The 17 fishing sets, 9 with longline and 8 with traps, were deployed between 51 and 2050 m depth and 30 and 1550 m, respectively.

In total 47 species were caught with the longlines (32 teleosts and 12 elasmobranchs) and 33 species were caught with the traps (9 teleosts, 4 elasmobranchs, 17 crustaceans, 2 echinoderms and 1 mollusc). During the survey, data on fishing effort, catches, biological data and biological material for different studies were collected. Several specimens of each of the species caught were also whole preserved for the reference collections of the Funchal Natural History Museum (MMF) and the National Museum of Natural History and Science from the University of Lisboa (MUHNAC-UL).

galeria de imagens

+

Arquipelago601