Recursos de colección

Repositorio da Universidade dos Açores (8.391 recursos)

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

ARQ - CBM - Número 23A

Mostrando recursos 1 - 6 de 6

  1. Ten invertebrates new for the marine fauna of Madeira.

    Wirtz, Peter
    The nemertine Drepanogigas albolineatus, the gastropods Coralliophila kaofitorum, Haminoea orteai, Discodoris rosi and Janolus n sp, the decapod Palaemonella atlantica, the phoronids Phoronis australis and Phoronopsis californica, the starfish Chaetaster longipes and the tunicate Distaplia corolla are recorded from Madeira archipelago for the first time.

  2. Population status and diet of the Yellow-legged Gull in the Azores.

    Neves, Verónica C.; Murdoch, Nadia; Furness, Robert W.
    During 2004 a census of the Yellow-legged Gull (Larus michahellis atlantis) was conducted in the Azores to assess its present status in the archipelago. The census yielded an estimate of 4249 breeding pairs, an increase by almost 60% since the previous survey conducted in 1984. Gulls were detected on a total of 14 islets and/or sea stacks and are probably limiting the distribution of terns in the archipelago. Out of 37 gull breeding sites found during the 1984 and 2004 surveys, 24 were located within 1 km of tern colonies. All the gull colonies were coastal except Lagoa do Fogo on...

  3. Age and growth of the blue jack mackerel, Trachurus picturatus Bowdich, 1825 (Pisces: Teleostei) off Madeira archipelago.

    Vasconcelos, Joana; Alves, Adriana; Gouveia, Elisabete; Faria, Graça
    Between 1984 and 1986, 630 pairs of sagitta otoliths were collected to determine the age and growth of the blue jack mackerel, Trachurus picturatus from Madeiran waters. The oldest specimen in this study was nine years old and the largest was 46 cm of total length (TL). The parameters of the von Bertalanffy growth curve were estimated for the whole period studied for all fish (L∞=42.32 cm, k=0.161 year-1, t0= -2.563 year; r2=0.743) for males (L∞=39.57 cm, k=0.194 year-1, t0=-2.282 year; r2=0.722) and for females (L∞=49.78 cm, k=0.114 year-1, t0=-3.052 year; r2 = 0.747). There was no significant differences in mean...

  4. Oceanic cephalopod distribution and species diversity in the eastern north Atlantic.

    Clarke, Malcolm R.
    This work provides a baseline against which we might measure future changes to oceanic midwater cephalopod stability in the eastern North Atlantic It records a considerable sampling effort from 1959 to 1986 aimed at oceanic midwater cephalopods made by the author and colleagues in the eastern North Atlantic between approximately 10ºN to 70ºN and 0ºto 30ºW. From these samples the latitudinal distribution, the biodiversity and, to some extent, the relative rarity of the species present in the area is shown. Over 700 collections were made with a range of nets from small plankton nets to large commercial trawls of many designs. As an independent...

  5. Morphological studies of Hapalospongidion macrocarpum and Nemoderma tingitanum (phaeophyceae) from the Salvage Islands (Madeira archipelago).

    Parente, Manuela I.; Neto, Ana I.; Fletcher, Robert L.; Gil-Rodríguez, María C.; Haroun, Ricardo J.
    Two species of encrusting brown algae (Phaeophyceae) are newly recorded for the Salvage Islands (Madeira Archipelago) viz. Nemoderma tingitanum and Hapalospongidion macrocarpum. The species are described, and information is presented concerning their ecology, morphology and geographical distribution in the Atlantic.

  6. Bryophytes (Musci) unexpectedly rare or absent in the Azores.

    Sjögren, Erik
    Search for bryophytes in the Azores has until now resulted in a recording of about 430 species of mosses and hepatics. A few of these species are endemic to the Azores or to the Macaronesian island groups. The majority of the other species includes cosmopolitan or oceanic/suboceanic European species. This paper treats some mosses (Musci) which have not managed to get established in the Azorean bryovegetation. Some are just unexpectedly rare and frequently recorded as present in only one or two of the nine Azorean islands. All such species must overcome the gap between the Azorean islands and/or between the islands and...

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