ARQ - LMS - Número 30
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Artigos publicados no Número 30 - 2013
CONTENTS:
ALVES, A. & J. VASCONCELOS - Age and growth of the pink dentex Dentex gibbosus (Rafinesque, 1810) caught off the Madeira Archipelago.FERREIRA, A.F., A.M. FRIAS MARTINS, R. TRISTÃO DA CUNHA, P. MELO & A.R. RODRIGUES - Reproductive biology of Oxychilus(Atlantoxychilus) spectabilis (Milne-Edwards, 1885) (Gastropoda: Pulmonata): a gametogenic approach.
ARKHIPKIN, ALEXANDER, PAUL BRICKLE & VLADIMIR LAPTIKHOVSKY - Links between marine fauna and oceanic fronts on the Patagonian Shelf and Slope.
FERREIRA, M.T., P.A.V. BORGES, L. NUNES, T.G. MYLES, O. GUERREIRO & R.H. SCHEFFRAHN - Termites (Isoptera) in the Azores: an overview of the four invasive species currently present in the archipelago.
BORGES, P.A.V., M. REUT, N.B. DA PONTE, J.A. QUARTAU, M. FLETCHER, A.B. SOUSA, M. POLLET, A.O. SOARES, J.A.P. MARCELINO, C. REGO & P. CARDOSO - New records of exotic spiders and insects to the Azores, and new data on recently introduced species.
SHORT COMMUNICATIONS:
YAIR BEN-DOV - New data on the scale insects (Hemiptera, Coccoidea) of Tenerife, Canary Islands.RAMÍREZ, R. & R. RIERA - First record of Ligia oceanica (Linnaeus, 1767) (Isopoda: Ligiidae) in the Canary Islands.
VIEIRA, VIRGÍLIO & ADOLFO CORDERO-RIVERA - New data on the Odonate fauna from Graciosa Island (Azores).
HART, J. & P. WIRTZ - Phyllidia flava Aradas, 1847 (Mollusca Opisthobranchia), new record for the Azores.
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- Phyllidia flava Aradas, 1847 (Mollusca Opisthobranchia), new record for the AzoresPublication . Hart, Justin; Wirtz, PeterCervera 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.
- New data on the Odonate fauna from Graciosa Island (Azores)Publication . 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 this was due to a lack of sampling and suggested that it is likely that all four species are present in all of the nine islands (Cordero Rivera et al. 2005). Further sampling confirmed the presence of these four species in Santa Maria Island (Lorenzo-Carballa et al. 2009; Tavares et al. 2010). Very few records of odonates have been published for Graciosa. The first was a female S. fonscolombii observed on July 17, 1938 (Valle 1940). No indication of the relevant locality was given. To our knowledge, only A. imperator and S. fonscolombii species were further recorded for Graciosa (Cordero-Rivera et al. 2005; Lorenzo-Carballa et al. 2009), but again without localities. So, the present contribution deals with new odonate records for this island. Given that I. hastata is of great interest in every island of the archipelago due to its unique parthenogenetic reproduction in all its Azorean localities, the first author made two visits to Graciosa in 2004 and 2007, in order to survey the local odonate fauna.
- First record of Ligia oceanica (Linnaeus, 1767) (Isopoda: Ligiidae) in the Canary IslandsPublication . Ramírez, Rubén; Riera, RodrigoThis 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.
- New data on the scale insects (Hemiptera, Coccoidea) of Tenerife, Canary IslandsPublication . Ben-Dov, YairThis 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.
- Termites (Isoptera) in the Azores: an overview of the four invasive species currently present in the archipelagoPublication . 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) and Praia da Vitória (Terceira) respectively. Due to its location and weather conditions the Azorean archipelago is vulnerable to colonization by invasive species. The fact that there are four different species of termites in the Azores, all of them considered pests, is a matter of concern. Here we present a comparative description of these species, their known distribution in the archipelago, which control measures are being used against them, and what can be done in the future to eradicate and control these pests in the Azores.
- Links between marine fauna and oceanic fronts on the Patagonian Shelf and SlopePublication . Arkhipkin, Alexander; Brickle, Paul; Laptikhovsky, VladimirOne 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 mixture with shelf waters creates quasi-stationary areas of high productivity. Sub-Antarctic fishes (e.g., southern blue whiting) utilise these areas as their feeding and spawning grounds. Deepwater toothfish and squid (Onykia ingens) use them as pathways to migrate from the shelf to deepwater habitats. Temperate fish (e.g., hoki and rock cod) and squid (Illex argentinus) feed mainly at the frontal zones with mixture of SASW and Patagonian Shelf waters. The presence of four quasi-stationary meso-scale fronts between the deepwater Falkland Current and shelf waters plays an important role in distribution, migrations and spawning of marine fauna that use them in accordance to their Sub-Antarctic and temperate origins.
- Reproductive biology of Oxychilus(Atlantoxychilus) spectabilis (Milne-Edwards, 1885) (Gastropoda: Pulmonata) : a gametogenic approachPublication . 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 snail has a functional protandric tendency and gonadal maturation is initially triggered by photophase and after regulated by temperature. The positive correlation between gonadal maturation and morphometric shell characters indicate that these parameters might be a useful tool for the diagnosis of snail’s maturation.
- Age and growth of the pink dentex Dentex gibbosus (Rafinesque, 1810) caught off the Madeira ArchipelagoPublication . Alves, Adriana; Vasconcelos, JoanaA 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 for all fish: for females q=0.01094 and b=3.033, for males q=0.10002 and b=3.047 and for all, q=0.01027 and b=3.046. According to the F-test, there were no significant differences between the weight-length relations obtained for females and males (F-test, F=2.2526, p=0.06646).
- New records of exotic spiders and insects to the Azores, and new data on recently introduced speciesPublication . 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, PedroThe 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 biodiversity, as well as strategies to halt the introduction of alien species are discussed.