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ARQ - LMS - Número 26

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http://hdl.handle.net/10400.3/419

Artigos publicados no Número 26 - 2009

CONTENTS:

Moura, Mónica, Luís Silva - Vegetative propagation of the Azorean endemic shrub Viburnum treleasei Gand.

Moreira, O., J. Martins, L. Silva & M. Moura - Propagation of the endangered Azorean cherry Prunus azorica using stem cuttings and air layering.

Raposeiro, P.M. & A.C. Costa - Benthic macroinvertebrate based indices for assessing the ecological status of freshwaters on oceanic islands.

Mendes, S., M.J. Fernández-Gómez, M.P. Galindo-Villardón, F. Morgado, P. Maranhão, U. Azeiteiro & P. Bacelar-Nicolau - The study of bacterioplankton dynamics in the Berlengas Archipelago (West coast of Portugal) by applying the HJ-biplot method.

Schmiing, M. & P. Afonso - Acoustic tag retention of the Mediterranean slipper lobster Scyllarides latus (Latreille, 1802) in the Azores.

Wirtz, P. - Ten new records of marine invertebrates from the Azores.

Wirtz, P. - Thirteen new records of marine invertebrates and two of fishes from Cape Verde Islands.

Severino, R.B., I. Afonso-Dias, J. Delgado & M. Afonso-Dias - Aspects of the biology of the leaf-scale gulper shark Centrophorus squamosus (Bonnaterre, 1788) off Madeira archipelago.

SHORT COMMUNICATIONS:

Pereira, M.J. - Reversion to juvenility: the use of epicormics in the micropropagation of mature wild shrubs of Vaccinium cylindraceum Smith (Ericacaeae).

Silva, L., J. Marcelino, R. Resendes & J. Moniz - First record of the top invasive plant Leycesteria formosa (Caprifoliacea) in Terceira Island, Azores.

Sampaio, Í., O. Ocaña, F. Tempera, A. Braga-Henriques, V. Matos & F.M. Porteiro - New occurrences of Corallium spp. (Octocorallia, Coralliidae) in the Central Northeast Atlantic.

Loureiro, N.S. & D. Matos - Presence of fibropapillomatosis in green turtles Chelonia mydas at Príncipe Island in the Gulf of Guinea.

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  • Presence of fibropapillomatosis in green turtles Chelonia mydas at Príncipe Island in the Gulf of Guinea
    Publication . Loureiro, Nuno de Santos; Matos, Damião
    Fibropapillomatosis is a transmissible and life threatening disease associated with one or more herpesviruses that are afflicting sea turtles worldwide (Herbst 1994). First documented on green turtles Chelonia mydas (Quackenbush et al. 1998), since the 1990's it has been found on other species, like hawksbills Eretmochelys imbricata (D’Amato & Moraes-Neto 2000; Williams & Bunkley-Williams 1996), olive ridleys Lepidochelys olivacea (Herbst 1994), loggerheads Caretta caretta (Aguirre 1998; Harms et al. 2008), and leatherbacks Dermochelys coriacea (Huerta et al. 2000). The etiology and prevalence of fibropapillomatosis are not fully understood and further research is needed. Even so, it is accepted that pelagic juveniles are free of the disease when recruiting to coastal foraging grounds (Ehrhart et al. 2000). [...]
    2009Journal article Open access Show more
  • New occurrences of Corallium spp. (Octocorallia, Coralliidae) in the Central Northeast Atlantic
    Publication . Sampaio, Íris; Ocaña, Óscar; Tempera, Fernando; Henriques, Andreia Braga; Matos, Valentina; Porteiro, Filipe M.
    Corallium niobe Bayer, 1964 and Corallium tricolor (Johnson, 1899) are reported as new records from the central Northeast Atlantic. C. niobe was caught in the Azores and C. tricolor on the slope of the Irving Seamount (South Azores Seamounts). The presence of Corallium johnsoni Gray, 1860 in Azorean waters is confirmed. The sub-tropical Macaronesian islands and seamounts appear to be an important hot-spot for Corallium spp. Most colonies have been collected on seamounts and island slopes around Madeira, Canaries, Azores and the Cape Verde archipelagos. In the Azores most of these corals live below the normal depth of commercial fishing operations and are unlikely to be severely impacted by this activity.
    2009Journal article Open access Show more
  • First record of the top invasive plant Leycesteria formosa (Caprifoliacea) in Terceira Island, Azores
    Publication . Silva, Luís; Marcelino, José; Resendes, Roberto; Moniz, João
    Leycesteria formosa Wallich in Roxb. (Caprifoliaceae) is considered as one of the top 100 invasive species in Macaronesia, due to the extensive infestations presently reported for São Miguel Island, where it is invading Pico da Vara/Tronqueira Special Protection Area, and Lagoa do Fogo Nature Reserve (Silva et al. 2008). It is found invading marginal areas like the margin of Cryptomeria japonica stands, but also the native forest and other types of vegetation, not only in sheltered locations (ravines and water courses) but also at highly exposed sites, (i.e. Monte Escuro). Recorded habitats include Calluna scrubland, Laurus forest, Ilex forest, Juniperus forest, pasture margins, water stream banks, ravines, roadsides, Cryptomeria production forest, and Pittosporum exotic woodland. [...]
    2009Journal article Open access Show more
  • Reversion to juvenility: the use of epicormics in the micropropagation of mature wild shrubs of Vaccinium cylindraceum Smith (Ericacaeae)
    Publication . Pereira, Maria João
    An efficient in vitro method was developed to propagate the shoots of mature wild shrubs of Vaccinium cylindraceum Sm. by axillary bud proliferation on epicormic stems. In the initial culture, 46.9% of the epicormic buds produced new shoots with juvenile morphological features. The number of nodes per shoot and the shoot length for explants which originated from epicormic buds was significantly higher when compared to that of winter dormant buds but similar when compared to that of seedling buds. The three most distal buds of epicormic twigs produced the best rates of shoot initiation: 87.5% (position 1) to 62.5% (position 3).
    2009Journal article Open access Show more
  • Aspects of the biology of the leaf‐scale gulper shark Centrophorus squamosus (Bonnaterre, 1788) off Madeira archipelago
    Publication . Severino, Ricardo B.; Afonso-Dias, Isabel; Delgado, João; Afonso-Dias, Manuel
    A total of 206 Centrophorus squamosus (Bonnaterre, 1788) with a total length ranging from 89 to 146 cm were captured at an average depth of 1200 metres. Of the 61 females sampled, 34% were gravid, showing an absolute individual fecundity of two to ten embryos (pups). The results clearly indicated that this deepwater shark spawns in the Portuguese waters off Madeira archipelago.
    2009Journal article Open access Show more
  • Thirteen new records of marine invertebrates and two of fishes from Cape Verde Islands
    Publication . Wirtz, Peter
    The sea anemones Actinoporus elegans Duchassaing, 1850 and Anthothoe affinis (Johnson, 1861) are new records from Cape Verde Islands. Also new to the marine fauna of Cape Verde are an undescribed mysid species of the genus Heteromysis that lives in association with the polychaete Branchiomma nigromaculata, the shrimp Tulearicoaris neglecta Chace, 1969 that lives in association with the sea urchin Diadema antillarum, an undescribed nudibranch of the genus Hypselodoris, and two undescribed species of the parasitic gastropod genus Melanella and Melanella cf. eburnea. An undescribed plathelmint of the genus Pseudobiceros, the nudibranch Phyllidia flava (Aradas, 1847) and the parasitic gastropod Echineulima leucophaes (Tomlin & Shackleford, 1913) are recorded, based on colour photos taken in the field. The crab Nepinnotheres viridis Manning, 1993 was encountered in the bivalve Pseudochama radians, which represents the first host record for this pinnotherid species. The nudibranch Tambja anayana, previously only known from a single animal, was reencountered and photographed alive. The sea anemone Actinoporus elegans, previously only known from the western Atlantic, is also reported here from São Tomé Island. In addition, the bythiid fish Grammonus longhursti and an undescribed species of the genus Apletodon are recorded from the Cape Verde Islands for the first time.
    2009Journal article Open access Show more
  • Ten new records of marine invertebrates from the Azores
    Publication . Wirtz, Peter
    The sea anemones Telmatactis cricoides (Duchassaign, 1850) and Actinia n. sp., the molluscs Tonna galea Linnaeus, 1758, Vitreolina philippi (de Rayneval & Ponzi, 1854), Melanella n. sp., Phidiana lynceus (de Rayneval & Ponzi, 1854) and Anomia patelliformis (Linnaeus, 1761), the nemertine Baseodiscus delineatus (DelleChiaje, 1825) and the echinoderms Leptosynapta inhaerens (O. F. Müller, 1776) and Stichopus regalis (Cuvier, 1817), are here recorded from the Azores for the first time. The presence of the two starfish species Chaetaster longipes (Retzius, 1805) and Luidia ciliaris (Philippi, 1837) in the Azores is confirmed and the spawning behaviour of the sea urchin Echinocyamus pusillus (O. F. Müller, 1776) is described.
    2009Journal article Open access Show more
  • Acoustic tag retention of the Mediterranean slipper lobster Scyllarides latus (Latreille, 1802) in the Azores
    Publication . Schmiing, Mara; Afonso, Pedro
    Moulting, growth and retention of externally attached acoustic tags were studied in ten Mediterranean slipper lobsters, Scyllarides latus (Latreille, 1802). Animals were kept in a cage at 20 m depth in Faial Island, Azores, over a period of nine months. No negative effects of tag attachment on moult or behaviour were detected, but a negative effect on growth cannot be excluded. Moulting was correlated with ambient water temperature and resulted in an increase of approximately 7% in mean size and 17% in mean weight. The results demonstrate that the use of externally attached acoustic transmitters in this species is adequate for medium-term movement studies but not for longer-term annual studies, due to the rate of molting.
    2009Journal article Open access Show more
  • The study of bacterioplankton dynamics in the Berlengas Archipelago (West coast of Portugal) by applying the HJ-biplot method
    Publication . Mendes, Susana; Fernández-Gómez, M.J.; Galindo-Villardón, M.P.; Morgado, F.; Maranhão, P.; Azeiteiro, Ulisses M.; Bacelar-Nicolau, P.
    The relationship between bacterioplankton and environmental forcing in the Berlengas Archipelago (Western Coast of Portugal) were studied between February 2006 and February 2007 in two sampling stations: Berlenga and Canal, using an HJ-biplot. The HJ-biplot showed a simultaneous display of the three main metabolic groups of bacteria involved in carbon cycling (aerobic heterotrophic bacteria, sulphate-reducing bacteria and nitrate-reducing bacteria) and environmental parameters, in low dimensions. Our results indicated that bacterial dynamics are mainly affected by temporal gradients (seasonal gradients with a clear winter versus summer opposition), and less by the spatial structure (Berlenga and Canal). The yearly variation in the abundance of aerobic heterotrophic bacteria were positively correlated with those in chlorophyll a concentration, whereas ammonium concentration and temperature decreased with increasing phosphates and nitrites concentration. The relationship between aerobic heterotrophic bacteria, chlorophyll a and ammonium reveals that phytoplankton is an important source of organic substrates for bacteria.
    2009Journal article Open access Show more
  • Benthic macroinvertebrate based indices for assessing the ecological status of freshwaters on oceanic islands
    Publication . Raposeiro, Pedro M.; Costa, Ana C.
    Following the Water Framework Directive (2000/60/EC), macroinvertebrates are required biological elements for monitoring European aquatic ecosystems. Several efforts have been made towards establishing a biomonitoring programme for the Azores freshwater systems using benthic macroinvertebrates. However, little was previously known concerning Azorean freshwater macroinvertebrate fauna. Data from a major ongoing survey of macroinvertebrate freshwater fauna for two islands are presented and the use of macroinvertebrates as water quality indicators for the Azorean streams is evaluated. The upper, middle and lower reaches of streams longer than 10 km from São Miguel (10) and Santa Maria (1) were surveyed (a total of 33 samples). A total of 21 taxa were collected; Diptera, in particular chironomidae, were dominant; chironomids were collected from all sampling sites. The Azorean lotic fauna is characterized by low levels of abundance and the absence of macroinvertebrate groups commonly associated with continental systems. Traditional biotic indices, used to classify ecological quality, yielded poor to bad classifications despite little or no environmental impacts at the sampling sites. The paucity of macroinvertebrate fauna is probably due to the result of geological and physicochemical processes, the oceanic character of the islands, their volcanic origin, small size and geological youth and climate related factors such as seasonal peaks in rainfall. Considering these constraints, we demonstrate that watershed age plays a determinant role in shaping Azorean macroinvertebrate freshwater communities which can confound the water quality classification via the use of traditional biotic indices.
    2009Journal article Open access Show more