Browsing by Author "Neto, Ana I."
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- Abundance, age-structure and growth and reproduction of gobies (Pisces, Gobiidae) in the Ria de Aveiro Lagoon (Portugal)Publication . Arruda, Luís M.; Azevedo, José M. N.; Neto, Ana I.Biological data concerning the abundance, age, growth and reproduction of seven species of gobies in the Ria de Aveiro lagoon (Portugal) are presented and discussed. The seasonal changes in species abundance are ascribed either to recruitment and mortality or to sporadic occurrence. Gobius niger, Pomatoschistus minutus and P. microps are included in the first case, and P. pictus, P. lozanoi, Aphia minuta and G. paganellus in the second. Only G. niger and G. paganellus were found to live more than 1 year. Growth took place all year round, although it was slow in winter. There is an indication that temperature influenced the start of growth in spring. Almost all the species (except G. paganellus and P. lozanoi) were found to spawn inside the lagoon. Spawning seasons were found to be shorter for G. niger and A. minuta (summer only) than for species of Pomatoschistus (with reproductive periods in winter and summer).
- Accumulation of metals in Fucus spiralis subject to increased temperature and acidity.Publication . Wallenstein, Francisco; Torrão, Daniel F.; Neto, Ana I.; Wilkinson, Martin; Rodrigues, Armindo
- Additions to the Marine Algal (Seaweed) Flora of the Azores.Publication . Tittley, Ian; Neto, Ana I.; Farnham, William F.; Parente, Manuela I.Ten species of benthic marine algae, new distribution records for the Azores achipelago, are itemised; two other species records (Heterosiphonia crispella and Laminaria ochroleuca) are confirmed for the islands. Six species (Bryopsis pennata, Cottoniella filamentosa, Dasya baillouviana, Feldmannia paradoxa, Heterosiphonia crispella and Lomentaria clavellosa) show an amphi-Atlantic distribution pattern; four (Bonnemaisonia asparagoides, Laminaria ochroleuca, Pterosphonia ardreana and Stylonema cornu-cervi) show a European-African-Mediterranean distribution pattern. The occurrence of Dudresnaya crassa, a western Atlantic warm-water species, represents an extension of its known distributional range to the east. An Ahnfeltiopsis was found which resembled A. intermedia, a species that occurs in the Atlantic Ocean to the south of the Azores.
- Age and growth of the grey mullets (Pisces, Mugilidae) in the Ria de Aveiro (Portugal)Publication . Arruda, Luís M.; Azevedo, José M. N.; Neto, Ana I.EDAD Y CRECiMIENTO DE LOS MUGILiDOS (PISCES, Mugilidae) DE LA RÍA DE AVEIRO, PORTUGAL. Se estudiaron la abundancia relativa y el índice de crecimiento, tanto en relación a tamaño como a peso, de los mugílidos de la ría de Aveiro. Los resultados obtenidos indicaron que, normalmente y durante todo el ano, L. aurata era la especie dominante en cada una de las zonas de muestreo. La migración de los mugílidos jóvenes, desde la zona litoral hasta la laguna, ocurría durante los meses de septiembre a noviembre. Por otra parte, los índices de crecimiento registraron un período de rápido desarrollo durante primavera y verano, que fue disminuyendo o cesó completamente en el transcurso de los cinco o seis meses siguientes. Hay indicios de que la temperatura es un factor importante en la fase inicial del desarrollo.
- Algae based biotopes of the Azores (Portugal): spatial and seasonal variation.Publication . Wallenstein, Francisco; Neto, Ana I.; Álvaro, Nuno V.
- Algae-based biotopes of the Azores (Portugal): spatial and seasonal variation.Publication . Wallenstein, Francisco; Neto, Ana I.; Álvaro, Nuno V.; Santos, Catarina I.The increasing importance of coastal management created the need for a systematic classification and characterization of marine communities. Accurate quantitative methodologies for rocky shore algae-based biotope definition, were developed and tested on the Islands of São Miguel and Santa Maria (Azores). Shores of both islands were surveyed, covering all rocky substrate types. Biotopes were defined by assessing the associated habitat and species characteristics, using ANOSIM and SIMPER analysis, respectively. A total of ten biotopes were identified. Generally both islands’ biotopes are characterized by the same taxa/ecological categories, in summer and in winter. However, association between these taxa/ecological categories and the shore height at which they occur differs geographically and temporally. There is a generalized gradual succession of taxa/ecological categories from upper intertidal down to deepest subtidal, although geographical differences occur. Diversity is highest at the land–water interface and decreases towards both extremes (upper intertidal and deepest subtidal level). The strongest evidence of seasonal variation occurs at the upper intertidal. The methodology used proves to be effective in broad scale shoreline assessment of biological communities in warm-temperate coastal marine environments, and thus suitable for the purpose it was developed for. As a consequence it should be applied to the remaining islands of the Azorean archipelago as well as to other macaronesian islands, e.g. Madeira and the Canaries.
- Algal characterized rocky-shore biotopes in the Azores and their affinities.Publication . Tittley, Ian; Neto, Ana I.
- Algal collections in the Herbarium Ruy Telles Palhinha, AZB.Publication . Nogueira, Eunice M.; Medeiros, João; Neto, Ana I.
- The algal flora of the Azores: a historical and biogeographical approach.Publication . Terra, Marlene R.; Wallenstein, Francisco; Nogueira, Eunice M.; Neto, Ana I.; Tittley, Ian
- Algal zonation patterns in the Azores.Publication . Neto, Ana I.