Scientia Marina, Vol 82, No S1 (2018)

Deep-sea sharks as by-catch of an experimental fishing survey for black scabbardfishes (Aphanopus spp.) off the Canary Islands (NE Atlantic)


https://doi.org/10.3989/scimar.04793.03A

Mafalda Freitas
OOM - Funchal Marine Biology Station and Marine and Environmental Sciences Centre (MARE) - OOM - Funchal Natural History Museum, Portugal
orcid http://orcid.org/0000-0002-2758-7177

Luísa Costa
OOM - Funchal Marine Biology Station and Marine and Environmental Sciences Centre (MARE), Portugal
orcid http://orcid.org/0000-0001-9107-6200

João Delgado
OOM - Research Service, Regional Directorate of Fisheries, Portugal
orcid http://orcid.org/0000-0003-4268-7202

Sebastián Jiménez
Instituto Español de Oceanografía, Centro Oceanográfico de Canarias, Spain
orcid http://orcid.org/0000-0002-6534-4096

Viriato Timóteo
OOM - Research Service, Regional Directorate of Fisheries, Portugal

Joana Vasconcelos
OOM - Research Service, Regional Directorate of Fisheries, Portugal
orcid http://orcid.org/0000-0003-3880-2554

José A. González
Applied Marine Ecology and Fisheries, i-UNAT, Universidad de Las Palmas de Gran Canaria, Spain
orcid http://orcid.org/0000-0001-8584-6731

Abstract


The deep-sea sharks associated as by-catch of the Madeiran midwater drifting longline fishery for scabbardfishes (Aphanopus spp.) were investigated by means of an experimental survey at 800-1200 m depth within the Canary Islands Exclusive Economic Zone, whose fishing grounds have been exploited during the past 15 years. Nine species of chondrichthyans were identified, belonging to five families: Pseudotriakidae, Centrophoridae, Etmopteridae, Somniosidae and Chimaeridae. Data on length, weight and sex ratio for the 436 chondrichthyan individuals caught in the March 2009 survey are given. Several voucher specimens of each species caught were deposited in the collections of the Natural History Museum of Funchal.

Keywords


by-catch; deep-sea Chondrichthyes; midwater drifting longline; NE Atlantic

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References


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