Recursos de colección

Repositorio da Universidade dos Açores (8.657 recursos)

O Repositório Institucional da Universidade dos Açores desenvolvido no âmbito do projecto RCAAP.

ARQ - CBM - Número 17A

Mostrando recursos 1 - 10 de 10

  1. Diets of forkbeard (Phycis phycis) and conger eel (Conger conger) off the Azores during spring of 1996 and 1997

    Morato, Telmo; Solà, Encarnacion; Grós, Maria P.; Menezes, Gui M.
    The forkbeard, Phycis phycis, and conger eel, Conger conger, are two coastal species, with a wide bathymetric and geographical distribution. The longline fleet of the Azores catches these two important commercial species. Few studies on their diet composition were found in literature. Data were collected during the demersal cruise surveys that took place aboard the R/V “Arquipélago” during the spring of 1996 and 1997. Stomachs of 53 forkbeards and 95 conger eels were examined to define their diets. Both species fed primarily on fishes, mainly on two benthopelagic species (Capros aper and Macroramphosus scolopax). However, the relative importance of fish was higher for conger...

  2. An Atlantic cetacean survey using yachtsmen : a pilot study.

    Boisseau, Oliver; Prieto, Rui; Nicholson, Desmond; Gordon, Jonathan
    In the summer of 1998, yachtsmen sailing from the Caribbean to the Azores were encouraged to take part in an Atlantic cetacean survey. The principle aim of this project was to evaluate the potential of using regular seafarers as sources of data on cetacean distribution. Identification guides and sighting forms were distributed and participants were asked to record any cetacean sightings as well as to conduct routine set-effort watches. A secondary aim of the project was to investigate reports of illegal whaling in the Atlantic. Data collected from the yachtsmen reveal a concentration of sightings along the mid- Atlantic ridge, perhaps corresponding...

  3. Hydatina physis (Mollusca: Gastropoda: Opisthobranchia) from the Azores.

    Wirtz, Peter
    The opisthobranch gastropod Hydatina physis (Linné, 1758) is recorded from the Azores for the first time. The distribution of the species is reviewed. Colour photos of live animals are presented and colour variation of the species is discussed.

  4. An inland population of Azorina vidalii (Watson) Feer at Faial Island.

    Schäfer, Hanno
    An inland population of Azorina vidalii (Watson) Feer (Campanulaceae) near Capelo, Faial island, and the special habitat are described. The origin is discussed.

  5. Coastal marine fishes of São Tomé Island (Gulf of Guinea).

    Afonso, Pedro; Porteiro, Filipe M.; Santos, Ricardo S.; Barreiros, João P.; Worms, Jean; Wirtz, Peter
    Since the early works of Balthazar Osório, at the turn of the century, only few papers have been published on the ichthyofauna of São Tomé island. The papers dealing with these fishes were compilations of previous works or the results of a few scientific expeditions (e.g. "Galathea" and "Calypso"). In this paper, we present the results of several surveys carried out from the island over the last decade, together with an annotated revision of the known bibliography for the area. The result is an inventory of the coastal fish of São Tomé island. Our records (124 species belonging to 59...

  6. Collection and secondary metabolite investigations of marine organisms from the two Azorean Islands Faial and São Jorge.

    Goclik, Eva; König, Gabriele M.; Wright, Anthony D.
    In March and April of 1997 a total of 35 samples of marine organisms were collected from the Azorean Islands of Faial and São Jorge. These samples included 3 species of Chlorophyta, 7 species of Phaeophyta, 10 species of Rhodophyta, 2 species of Chordata, 3 species of Mollusca, and 7 species of Porifera. Of these samples Laxosuberites rugosus (Porifera), and Pachymatisma johnstonia (Porifera), are new records for the Azores. Secondary metabolite investigations of a number of these samples led to the isolation of para-hydroxybenzyl cyanide from the sponge Laxosuberites rugosus, and oxindol from the sponge Tedania anhelans. Both these compounds are...

  7. A new species of shallow water Sabellariidae (Annelida: Polychaeta) from Madeira Island, Portugal, and Canary Islands, Spain.

    Nishi, Eijiroh; Núñez, Jorge
    A new species of Sabellariidae (Annelida, Polychaeta), Lygdamis wirtzi, is described, based on material from Madeira and Canary Islands, northeastern Atlantic Ocean. The specimens were collected from sandy bottom at 7 to 14 m depth. The new species is characterised by the shape of the inner and outer paleae and of the nuchal hooks. The feeding position of living animals is described.

  8. Notes on the biology of Centrolabrus caeruleus Azevedo, 1999 (Teleostei: Labridae)

    Azevedo, José M. N.; Cepeda, Helena I. R.; Rodrigues, João Bernardo
    Centrolabrus caeruleus is a recently described littoral fish whose biology is poorly known, despite the fact that it is very abundant in the Azores. This paper presents general information about the age and growth, food and reproduction of this species. Males grow to larger sizes than females, and there are sexual differences in colour and behaviour. Preliminary von Bertalanffy growth curves are given for both sexes, based on modal analysis of the monthly length-frequency distributions. The length-weight relationship is also given. Food is dominated by small phytal invertebrates. Reproduction occurs mainly between March and June. Young of the year are...

  9. An investigation into the overwintering capability of Istocheta aldrichi (Mesnil) (Diptera: Tachinidae) a parasitoid of Popillia japonica Newman (Coleoptera: Scarabaeidae) on Terceira Island, Azores.

    Simões, Ana M.; Grenier, S.
    A study of diapause in the parasitic fly Istocheta aldrichi (Diptera: Tachinidae) was undertaken to help investigate the possibility of its establishment in Terceira as a biological control agent of the Japanese beetle, Popillia japonica (Coleoptera: Scarabaeidae). It was concluded that pupae should be imported from the USA only when they are almost ready to emerge, and to optimise rearing conditions there to increase emergence percentages. Conditions are not ideal for its development in Terceira, as this univoltine parasitoid has a high pupal mortality both in laboratory cultures and outdoors during the overwintering period. These studies should continue until I....

  10. Plant and arthropod species composition of sown and semi-natural pasture communities of three Azorean islands (Santa Maria, Terceira and Pico)

    Borges, Paulo A. V.
    Recent sowed and old semi-natural pastures from three Azorean islands (Santa Maria, Terceira and Pico) were investigated in terms of plant and arthropod species composition. Semi-natural sites were shown to be well suited to reveal distinct within island trends in semi-natural pasture communities. Variation in the composition of the vascular plants follows an altitudinal gradient, which is, a dry-wet gradient, and also human influences. It is in Santa Maria, as well as in the recent sown pastures of Terceira, that the influence of human activities on vascular plant communities is most dramatic. However, for arthropods these factors seem to be less important....

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