ARQ - LMS - Número 19A
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Artigos publicados no Número 19A - 2002
CONTENTS:
Berger, F. & A. Aptroot. - Further contributions to the flora of lichens and lichenicolous fungi of the Azores.Tittley, I. - Seaweed diversity in the North Atlantic Ocean.
Medeiros, J.R., H. Medeiros, C. Mascarenhas, L.B. Davin & N.G. Lewis. - Bioactive components of Hedera helix.
Ocaña, O. & J.C. Den Hartog. - A catalogue of actiniaria and corallimorpharia from the Canary Islands and from Madeira.
Vieira, V. - New records and observations on Macrolepidoptera (Insecta: Lepidoptera) from the Azores.
Udekem d'Acoz, C. d' & P. Wirtz. - 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.
Almada, V., F. Almada, M. Henriques, R.S. Santos & A. Brito. - On the phylogenetic affinities of Centrolabrus trutta and Centrolabrus caeruleus (Perciformes: Labridae) to the genus Symphodus: molecular, meristic and behavioural evidences.
Carvalho, N., R.G. Perrota & E.J. Isidro. - Age, growth and maturity in the chub mackerel (Scomber japonicus Houttuyn, 1782) from the Azores.
SHORT COMMUNICATIONS:
Strand, M. - Inventory of the ribbon worms (Phylum Nemertea) of Faial and Pico Islands, Azores.Calado, G. - New records for the Azorean opisthobranch fauna (Mollusca: Gastropoda)
Alves, F.M.A. & C.M.A. Alves. - Two new records of seabreams (Pisces: Sparidae) from the Madeira Archipelago.
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- Age, growth and maturity in the chub mackerel (Scomber japonicus Houttuyn, 1782) from the Azores.Publication . Carvalho, Natacha; Perrotta, Ricardo G.; Isidro, EduardoSagittae 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 August and length at 50% maturity was estimated as 27.78 cm TL (A50% = 2.23 years). Length-weight and length-length relationships were also determined: W = 0.0049FL3.2612; TL = 1.039 FL1.015; SL = 0.927FL 0.999.
- Bioactive components of Hedera helix.Publication . 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.
- A catalogue of actiniaria and corallimorpharia from the Canary Islands and from Madeira.Publication . Ocaña, Óscar; Hartog, J. C. denThe 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.
- Further contributions to the flora of lichens and lichenicolous fungi of the Azores.Publication . Berger, Franz; Aptroot, AndréSeveral 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 aenea, P. borreri, Pyrenula acutispora, Ramalina lacera, R. subpusilla, Rinodina anomala, R. intermedia, Scoliciosporum umbrinum, Strigula taylorii, Toninia mesoidea, Xanthoria candelaria and X. fallax. Fourteen additional lichenicolous fungi double the list of species from the Azores.
- Inventory of the ribbon worms (Phylum Nemertea) of Faial and Pico Islands, Azores.Publication . Strand, MalinA 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.
- New records and observations on Macrolepidoptera (Insecta: Lepidoptera) from the Azores.Publication . Vieira, VirgílioThis 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)).
- New records for the Azorean opisthobranch fauna (Mollusca:Gastropoda).Publication . Calado, GonçaloSeven 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.
- 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.Publication . Udekem d'Acoz, Cédric d’; Wirtz, PeterRecords 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 Eualus species is provided. Azorean specimens of Hippolyte varians prove to be especially small and slender, whilst Azorean Stenopus spinosus may have red, white or even proximally red and distally white antennae. The association between the hermit crab Nematopagurus longicornis and the antipatharian Antipathes wollastoni is recorded for the first time. A possibly undescribed Macropodia species is here recorded and illustrated as Macropodia sp., as only juvenile and damaged adult specimens were found. Azorean Portunus hastatus prove to be much less pubescent than their Mediterranean counterparts, and detailed drawings are given for this common but rarely comprehensively illustrated species.
- On the phylogenetic affinities of Centrolabrus trutta and Centrolabrus caeruleus (Perciformes: Labridae) to the genus Symphodus : molecular, meristic and behavioural evidences.Publication . Almada, Vitor; Almada, Frederico; Henriques, Miguel; Santos, Ricardo S.; Brito, AlbertoPhylogenetic 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 between C. trutta and C. caeruleus indicates that these species are very closely related. The 16S rDNA data suggest that C. trutta, C. caeruleus and S. roissali form a monophyletic group. The analysis of the 16S rDNA data also showed that S. melanocercus is the sister species of C. exoletus and it is not closely related to the species of Symphodus included in this study. Lack of nest building and parental behaviour in S. melanocercus, and its marked divergence to other members of the genus Symphodus in meristic characters, also stress its affinity with C. exoletus and its separation from the remaining species of Symphodus. Our data and the evidence available in the literature led us to propose the inclusion of C. trutta and C. caeruleus in the genus Symphodus, while S. melanocercus must be transferred to the genus Centrolabrus.
- Seaweed diversity in the North Atlantic Ocean.Publication . Tittley, IanSeaweed 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 Azores archipelago has been recently shown to be richer in species than sites on the American coast and in northern Europe. The conservation of seaweed biodiversity is briefly considered.