Recursos de colección

Repositorio da Universidade dos Açores (9.269 recursos)

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

ARQ - CBM - Número 19A

Mostrando recursos 1 - 11 de 11

  1. Two new records of seabreams (Pisces:Sparidae) from the Madeira Archipelago.

    Alves, Filipe M. A.; Alves, Catarina M. A.
    Two Sparidae species, the gilthead seabream Sparus aurata and the striped seabream Lithognathus mormyrus, were recorded during an underwater visual census at Madeira Island between March and October 2000. Several individuals were subsequently caught to confirm the identification. This is the first record of Sparus aurata for Madeira. Escape from a recent open sea aquaculture unit in the area is the most likely explanation for its occurrence. Although current literature and fish databases refer to L. mormyrus as being absent in this Archipelago, it had been previously recorded in fishing-grounds of Madeira in the sixties, and this study confirms its...

  2. New records for the Azorean opisthobranch fauna (Mollusca:Gastropoda).

    Calado, Gonçalo
    Seven new species of opisthobranchs are recorded for the first time from the Azores. These are: Aegires sublaevis Odhnerm, 1931; Doto koenneckeri Lemche, 1976; Doto furva Garcia-Gomez and Ortea Rato, 1983; Favorinus branchialis (Rathke, 1806); Facelina annulicornis (Charmisso and Eisenhardt, 1821); Cuthona caerulea (Montagu, 1804) and Cuthona foliata. (Forbes and Goodsit, 1838). The total number of opisthobranch species is thus extended to 116.

  3. Inventory of the ribbon worms (Phylum Nemertea) of Faial and Pico Islands, Azores.

    Strand, Malin
    A total of 9 nemertean species is recorded for the first time from Azorean waters. From a total of 38 individuals, 30 are identified as belonging to 9 different species whereas 8 individuals, which may be either local variants of known species or undescribed forms, are assigned to the Hoplo- or Palaeonemertea. The collection will contribute to part of a molecular phylogenetic study of the genus Tetrastemma.

  4. Age, growth and maturity in the chub mackerel (Scomber japonicus Houttuyn, 1782) from the Azores.

    Carvalho, Natacha; Perrotta, Ricardo G.; Isidro, Eduardo
    Sagittae from 349 specimens of chub mackerel collected between 1996 and 2002 were used in this study. Fork length ranged from 90 mm to 530 mm, corresponding to 9.6 mm and 56.57 mm TL ages ranged between 0 to 13 years. The von Bertalanffy growth equation was fitted to the length-at-age data and the estimated parameters were as follows: L∞ = 57.52 TL; k = 0.201 years-1; t0 = -1.093 years. Life span was estimated as being between 13 and 15.6 years and the instantaneous rate of natural mortality as 0.192. The spawning season in the Azores extends from March to...

  5. On the phylogenetic affinities of Centrolabrus trutta and Centrolabrus caeruleus (Perciformes: Labridae) to the genus Symphodus : molecular, meristic and behavioural evidences.

    Almada, Vitor; Almada, Frederico; Henriques, Miguel; Santos, Ricardo S.; Brito, Alberto
    Phylogenetic analysis of partial 12S and 16S mitochondrial rDNA regions, together with meristic and ethological data, has revealed that Centrolabrus trutta (Lowe, 1833), a species occurring in the Canaries and Madeira, and its close relative Centrolabrus caeruleus (Azevedo, 1999) from the Azores, are more closely related to most species of the genus Symphodus than to Centrolabrus exoletus (Linnaeus, 1758). Underwater behavioural observations showed that C. trutta, like C. caeruleus, shares with most Symphodus species sexual dichromatism, male nest building and male parental care of the eggs, traits that are absent in C. exoletus. The low number of base substitutions found...

  6. Observations on some interesting coastal Crustacea Decapoda from the Azores, with a key to the genus Eualus Thallwitz, 1892 in the Northeastern Atlantic and the Mediterranean.

    Udekem d'Acoz, Cédric d’; Wirtz, Peter
    Records of several rare or interesting Crustacea Decapoda from the Azores are presented in the present paper. Periclimenes sagittifer and Athanas nitescens are recorded for the first time in the archipelago. Periclimenes sagittifer was found on various hydroids and the antipatharian Antipathes wollastoni, some juveniles being also found amongst algae. Athanas nitescens was encountered free-living and in a shell inhabited by the hermit crab Dardanus calidus. Comparative illustrations are given for Azorean Periclimenes sagittifer and French specimens. New characters are proposed to distinguish Eualus cranchii, E. drachi, E. occultus and E. pusiolus, and a key to Northeastern Atlantic and Mediterranean...

  7. New records and observations on Macrolepidoptera (Insecta: Lepidoptera) from the Azores.

    Vieira, Virgílio
    This paper presents a summary of butterflies and moths from Santa Maria, Faial, Pico and S. Miguel islands. Collections and/or observations were made mostly during short visits in the years 1997, 1998 and 2001. The list of records includes 40 Macrolepidoptera species, belonging to the families Pieridae, Nymphalidae, Lycaenidae, Geometridae, Sphingidae and Noctuidae. Some species are new confirmed records, for Faial (Vanessa virginiensis (Drury), Hippotion celerio (Linnaeus), Ophiusa tirhaca (Cramer), Agrotis segetum (Denis & Schiffermüller)), for Pico (Vanessa cardui (Linnaeus)) and for Ilhéu de Vila Franca do Campo (Autographa gamma (Linnaeus)).

  8. A catalogue of actiniaria and corallimorpharia from the Canary Islands and from Madeira.

    The present catalogue is the first list of Actiniaria and Corallimorpharia from the Canary Islands and from Madeira (Central Macaronesia), including 41 species. The endemic actinofauna supports the idea of Central Macaronesian Archipelagos as a biogeographical unit, different from the other Macaronesian Archipelagos. 21 new records for the area are cited, some of them extending considerably the ranges for the species.

  9. Bioactive components of Hedera helix.

    Medeiros, Jorge R.; Medeiros, Helena; Mascarenhas, Carla; Davin, Laurence B.; Lewis, Norman G.
    The composition of a methylene chloride extract from the leaves of Hedera helix growing on S. Miguel island (Azores) was investigated. Fourteen compounds were identified. The extract was rich in methyl esters of several carboxylic acids, stigmasterol and α− and β−amyrin and promising antithrombin activity. The active components were identified as β−amyrin, stigmasterol and hexadecanoic acid. β−amyrin also presented activity on a brine shrimp (Artemia salina) bioassay.

  10. Seaweed diversity in the North Atlantic Ocean.

    Tittley, Ian
    Seaweed species-richness in the arctic and temperate North Atlantic Ocean (north of 39º N) is reviewed. Comparisons with other oceanic areas show, for example, the Indian Ocean to be richer in species but the northern North Atlantic Ocean to have a greater diversity of brown algal genera. Comparisons between North Atlantic regional floras show the north-east Atlantic to be richer in species than the north-west, and a gradient of species richness to occur from south to north along both coasts. The area comprising Ireland, southern England, Atlantic France and Spain may be considered a “hot-spot” of species richness. The mid-Atlantic...

  11. Further contributions to the flora of lichens and lichenicolous fungi of the Azores.

    Berger, Franz; Aptroot, André
    Several lichens are reported new to the flora of the Azores. Mycoporum sparsellum, and the lichenicolous coelomycete Laeviomyces fallaciosus are reported for the first time in Europe. Arthothelium crozalsianum, Bacidia friesiana, Belonia incarnata, Julella sericea, Micarea assimilata, Mycomicrothelia confusa and Roselliniopsis ventosa are recorded for the first time in Laurimacaronesia. New for the Azores are Acarospora umbilicata, Buellia aethalea, B. subdisciformis, Byssoloma marginatum, Canoparmelia texana, Catillaria atomarioides, Chaenotheca furfuracea, Chromatochlamys muscorum, Cladonia cyathomorpha, C. pocillum, C. rangiformis var. gracillima, Cliostomom griffithii, Endocarpon pusillum, Hypotrachyna taylorensis, Opegrapha ochrocheila, O. vermicellifera, O. vulgata, Parmotrema mellissii, Peltula euploca, Pertusaria hymenea, Phaeophyscia hispidula, Porina...

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