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 - LMS - Número 30

Mostrando recursos 1 - 9 de 9

  1. Phyllidia flava Aradas, 1847 (Mollusca Opisthobranchia), new record for the Azores

    Hart, Justin; Wirtz, Peter
    Cervera et al. (2006) listed 113 opisthobranch species from the Azores. Since then, several additional coastal opisthobranchs have been reported from the Azores, e.g. Malaquias et al. (2011), Pedro et al. (2011), Cordeiro et al. (2013). We here report yet another previously unrecorded opisthobranch species from the Azores. The observations were made while SCUBA diving at Pico Island, Azores. Two specimens were deposited in the Zoologische Staatssammlung, München, Germany.

  2. New data on the Odonate fauna from Graciosa Island (Azores)

    Vieira, Virgílio; Cordero-Rivera, Adolfo
    […]. Currently, four odonate species are known from the Azores archipelago (Valle 1940; Gardner 1959, 1960; Belle 1992; Cordero-Rivera et al. 2005; Lorenzo-Carballa et al. 2009), namely, Anax imperator Leach, 1815 (Aeshnidae), Sympetrum fonscolombii (Selys, 1840) (Libellulidae), Ischnura pumilio (Charpentier, 1825) and Ischnura hastata (Say, 1839) (Coenagrionidae). The first three species belong to the European fauna, whereas the last one is native to the Americas (Belle & van Tol 1990; Lorenzo-Carballa et al. 2009; Weihrauch 2011). In a previous paper we found that all four species were known from all islands except Santa Maria and Graciosa, but we proposed that...

  3. First record of Ligia oceanica (Linnaeus, 1767) (Isopoda: Ligiidae) in the Canary Islands

    Ramírez, Rubén; Riera, Rodrigo
    This study presents the first record of L. oceanica in the Canary Islands. Additionally, body features between L. oceanica and Ligia italica Fabricius, 1798, the other sea-slater inhabiting the Archipelago, were compared.

  4. New data on the scale insects (Hemiptera, Coccoidea) of Tenerife, Canary Islands

    Ben-Dov, Yair
    This short communication presents new data on 16 species of scale insects, belonging to 5 families of the Coccoidea (Hemiptera) which were collected by the author on April 1995 in the course of a short visit to Tenerife Island. Three species, indicated below with an asterisk *, are recorded here for the first time from the Canary Islands. Slide-mounted specimens of all the species recorded here are deposited in the Coccoidea Collection, Department of Entomology, Agricultural Research Organization, Bet Dagan, Israel. The collection number of each record is indicated in the Material Examined section.

  5. Termites (Isoptera) in the Azores: an overview of the four invasive species currently present in the archipelago

    Ferreira, Maria T.; Borges, Paulo A. V.; Nunes, Lina; Myles, Timothy G.; Guerreiro, Orlando; Scheffrahn, Rudolf H.
    In this contribution we summarize the current status of the known termites of the Azores (North Atlantic; 37-40° N, 25-31° W). Since 2000, four species of termites have been identified in the Azorean archipelago. These are spreading throughout the islands and becoming common structural and agricultural pests. Two termites of the Kalotermitidae family, Cryptotermes brevis (Walker) and Kalotermes flavicollis (Fabricius) are found on six and three of the islands, respectively. The other two species, the subterranean termites Reticulitermes grassei Clemént and R. flavipes (Kollar) of the Rhinotermitidae family are found only in confined areas of the cities of Horta (Faial)...

  6. Links between marine fauna and oceanic fronts on the Patagonian Shelf and Slope

    Arkhipkin, Alexander; Brickle, Paul; Laptikhovsky, Vladimir
    One of the main oceanographic features in the Southwest Atlantic is the transport of cold waters of Sub-Antarctic origin along the Patagonian slope to temperate latitudes (40-42ºS) by the Falkland Current. Originating from the Antarctic Circumpolar Current in the Drake Passage, the Current splits into two main northward streams skirting the Falkland Islands from west and east. The strongest eastern branch meanders onto the shelf to the south of Beauchêne Island and north-east of the Falkland Islands and creates four fronts with strong upwellings of the Sub-Antarctic Surface Water Mass (SASW). Extension of SASW to the shelf break and its...

  7. Reproductive biology of Oxychilus(Atlantoxychilus) spectabilis (Milne-Edwards, 1885) (Gastropoda: Pulmonata) : a gametogenic approach

    Ferreira, Ana Filipa; Martins, António M. de Frias; Cunha, Regina Tristão da; Melo, Paulo Jorge; Rodrigues, A. R.
    The taxonomic status and anatomy of Oxychilus (Atlantoxychilus) spectabilis (Milne-Edwards, 1885), an endemic land snail from Santa Maria Island, Azores, has been subject of detailed study, yet information about its life history is wanting. This study describes the reproductive cycle of O. (A.) spectabilis and assesses the validity of three morphometric shell parameters as maturation diagnostic characters. Our results indicate that individuals are reproductively more active from May to November. However, the availability of spermatozoa throughout the year and the residual values of mature oocytes during the remaining months seem to provide minimum conditions for reproduction all year round. The...

  8. Age and growth of the pink dentex Dentex gibbosus (Rafinesque, 1810) caught off the Madeira Archipelago

    Alves, Adriana; Vasconcelos, Joana
    A total of 146 otoliths were extracted for age readings from 68 females (23.2-90.1 cm TL), 76 males (22.0-81.3 cm TL) and 2 undetermined (30.3-38.0 cm TL), between April 2004 and December 2007. The maximum age obtained from whole otoliths was 11 years. Differences in the growth rhythms were observed between the sexes (females: L∞=134.4, K=0.092 and t0=−0.406; males: L∞=135.9, K=0.078 and t0=−0.894; and all fish were: L∞=149.8, K=0.078 and t0=−0.784). Pink dentex attain 50% of their maximum theoretical length during their fourth year of life. The weight-length relationship (W = q Lfb) were determined separately for each sex and...

  9. New records of exotic spiders and insects to the Azores, and new data on recently introduced species

    Borges, Paulo A. V.; Reut, Michal; Ponte, Nuno B.; Quartau, José A.; Fletcher, Murray; Sousa, António B.; Pollet, Marc; Soares, António O.; Marcelino, José; Rego, Carla; Cardoso, Pedro
    The introduction of exotic species in islands is recognized as a major threat to native biota and ecosystems. In this contribution we list thirteen widespread exotic invertebrate species (two Araneae, one Orthoptera, four Hemiptera, four Coleoptera and two Diptera) that were recorded from the Azorean Islands in the last few years for the first time. In addition, we list another ten invertebrate species (two Araneae, one Orthoptera, two Phasmatodea, one Hemiptera, three Coleoptera and one Diptera) that expanded their known range in the archipelago. The pathways of entrance for species in the Azores, their impact on the local economy and...

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