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- Length-weight relationships of six syngnathid species from Ria Formosa, SW Iberian coastPublication . Vieira, RP; Monteiro, P.; Ribeiro, J.; Bentes, L.; Oliveira, F.; Erzini, Karim; Gonçalves, J. M. S.In this study, the length-weight (LWR) parameters were estimated for six syngnathid species, including 2 seahorses and 4 pipefishes, from Ria Formosa, a temperate lagoon from the south coast of Portugal. A total of 5070 fishes were used to determine the LWR. The estimated b value ranged from 2.95 (Nerophis ophidion) to 3.36 (Syngnathus abaster). To the authors' best knowledge, LWR parameters were estimated for the first time for Nerophis ophidion and Syngnathus typhle for the Atlantic waters. Data here present are essential for management and conservation of these flagship species.
- The fish fauna of Ampère Seamount (NE Atlantic) and the adjacent abyssal plainPublication . Christiansen, Bernd; Vieira, RP; Christiansen, Sabine; Denda, Anneke; Oliveira, Frederico; Gonçalves, J. M. S.An inventory of benthic and benthopelagic fishes is presented as a result of two exploratory surveys around Ampe`re Seamount, between Madeira and the Portuguese mainland, covering water depths from 60 to 4,400 m. A total of 239 fishes were collected using different types of sampling gear. Three chondrichthyan species and 31 teleosts in 21 families were identified. The collections showed a vertical zonation with little overlap, but indications for an affinity of species to certain water masses were only vague. Although most of the species present new records for Ampe`re Seamount, all of them have been known for the NE Atlantic; endemic species were not found. The comparison with fish communities at other NE Atlantic seamounts indicates that despite a high ichthyofaunal similarity, which supports the ‘‘stepping stone’’ hypothesis of species dispersal, some differences can be attributed to the local features of the seamounts.
- Are weight, length and amount of venom related in scorpionfish?Publication . Vieira, Rui Pedro; Barreiros, J. P.We are investigating an evident relationship among weight, length and the amount of glandular venom tissue collected from the dorsal spines of a scorpionfish species.
- The deep-sea fish Kali macrodon: a new record for the tropical eastern Atlantic off Cape VerdePublication . Vieira, RP; Thiel, Ralf; Christiansen, Bernd; Coelho, Rui; Denda, Anneke; Gonçalves, J. M. S.A new deep-sea fish is reported for the tropical eastern Atlantic. The rare chiasmodontid Kali macrodon was caught for the first time in Cape Verdean waters during an oceanographic survey in September 2009. This record provides the fifth occurrence for the species in the north-eastern Atlantic and represents the third specimen ever caught in tropical waters.
- Weight-length relationships for five fish species from a temperate coastal lagoon of southern EuropePublication . Vieira, RP; Bentes, L.; Monteiro, P.; Ribeiro, J.; Erzini, Karim; Gonçalves, Jorge Manuel SantosThe weight-length relationships (WLR) were estimated for five fish species of Ria Formosa, a coastal lagoon in southern Portugal. WLRs for Gobius couchi, Pomatoschistus microps and Parablennius pilicornis were determined for the first time ever and for Gobius cruentatus for the first time for the southern European Atlantic coast.