Baía Norte (North Bay) in Santa Catarina State is considered a typical coastal bay and is surrounded by a network of Marine Protected Areas. The objectives of this study were to describe the composition of the demersal fish assemblage, identify seasonal and spatial structures on a fine scale and evaluate the role of habitat descriptors and abiotic variables affecting the fish assemblage structure. Seasonal samplings were conducted in 2005, using bottom trawls in six pre-established areas in Baía Norte in summer, fall, winter and spring. Simultaneously with each trawl, environmental data were collected with a multiparameter probe. Temporal and spatial differences in fish abundance were tested by a PERMANOVA. To illustratethe differences detected graphically we ran a canonical analysis of principal coordinates (CAP). The influence of environmental variables on the fish fauna was evaluated using a Distant Based Linear Model (DistLM) with Akaike's information criterion (AIC). A total of 9,888 specimens, distributed in 27 families and 62 species, were collected. Citharichthys spilopterus was the most abundant species. PERMANOVA detected differences for abundance between seasons, areas and interaction among all the factors. The DISTLM selected temperature and pH. The results highlight seasonality as an important factor in the structuring of fish fauna of the study place.

ResumoEste estudo teve como objetivo descrever as variações espaço-temporais da ictiofauna em uma laguna costeira aberta. Os peixes foram coletados na Lagoa da Conceição, Florianópolis-SC, totalizando 19 meses de amostragem entre outubro de 1987 e novembro de 1989. Foram realizadas coletas em sete pontos, sendo que em cada um foram empregados lances de tarrafa de diferentes malhas, rede de mão do tipo puçá, rede de arrasto de praia e pesca manual com anzóis. Foram coletados 8.299 indivíduos, classiicados em 61 espécies pertencentes a 28 famílias de peixes, totalizando 52.902,4 g. Em relação à permanência na laguna, 48 espécies (80%) foram classiicadas como visitantes e as outras 12 eram residentes. Foram observadas diferenças signiicativas entre as estações (n, biomassa, riqueza de espécies e H'Loge), entre as áreas (n e riqueza de espécies) e nas interações entre os fatores estação e área (n e biomassa). Os dados sobre a ictiofauna reforçam a importância ecológica do ambiente da laguna costeira como área berçário e de alimentação, já que a maioria das espécies encontra-se em fases de recrutamento dentro da Lagoa da Conceição. Palavras-chave: Ictiofauna; Laguna; Variação espaço-temporal Revista Biotemas, 28 (3), setembro de 2015 94 D. Borgo et al. Abstract Are the ish distribution patterns in an open coastal lagoon in the subtropical west Atlantic inluenced by spatial and seasonal variations?This study aimed to describe the spatial-temporal variations of the ish fauna in an open coastal lagoon. Fish were collected in Lagoa da Conceição, Florianópolis, Santa Catarina, Brazil, totaling 19 sampling months between October 1987 and November 1989. Sampling took place at 7 sites, and in each of them cast net throws of different meshes, "puçá" handheld ishing net, beach seine ishing net, and manual ishing hooks were used. A total of 8,299 individuals were collected, classiied into 61 species belonging to 28 ish families, totaling 52,902.4 g. Regarding stay in the lagoon, 48 species (80%) were classiied as visitors and the other 12 were residents. Signiicant differences were observed between seasons (n, biomass, species richness, and H'Loge), between areas (n and species richness), and in the interactions between the factors season and area (n and biomass). Data on ish fauna reinforce the ecological signiicance of the coastal lagoon environment as a nursery and feeding area, since most species are at recruitment stages within Lagoa da Conceição.

A B S T R A C TInterpreting fish community records is challenging for several reasons, including the lack of past ichthyofauna data, the cyclical temporal variations in the community, and the methodology employed, which usually underestimates fish assemblages. The objective of this study was to describe short-scale and meso-scale (nycthemeral period and months, respectively) temporal variations in the ichthyofauna composition and structure of a sheltered beach of Baía Norte (Florianópolis, Santa Catarina state, Brazil), using a capéchade net. Samples were collected monthly for a period of 48 hours. During the period from December 2010 to November 2011, a total of 19,302 individuals belonging to 89 species and 39 families were captured. The number of individuals that were sampled during the day and/or night was dependent on the sampling month. On average, the daytime assemblage was more abundant and different in structure and composition than the nighttime assemblage. Of the eight species that had the highest Index of Relative Importance (%IRI), five had higher variations (ANOVA F) between the day and night than between the months. This finding reinforced the need for sampling during both the day and night. The capéchade net effectively captured demersal and pelagic individuals in a broad range of sizes. R E S U M OA interpretação dos registros da comunidade ictíica têm se mostrado um desafio por diversos motivos, entre eles a falta de dados pretéritos, existência de variações temporais cíclicas na comunidade e pelos métodos utilizados que geralmente subamostram a assembleia. Neste sentido, o objetivo do presente trabalho foi descrever o padrão de variação temporal (nictemeral e mensal) na composição e na estrutura da ictiofauna de uma praia abrigada da Baía Norte de Florianópolis, usando uma rede capéchade. Coletas foram realizadas mensalmente, integrando um período de 48 horas/mês. Durante os meses de dezembro de 2010 a novembro de 2011, 19302 indivíduos distribuídos em 89 espécies e 39 famílias foram capturados. O número de indivíduos capturados durante o dia e/ou noite foi dependente do mês de coleta. Em média, a assembleia foi mais abundante durante o dia, diferindo em estrutura e composição do período da noite. Das oito espécies com maior Índice de Importância Relativa (IRI%), cinco apresentaram maior variação (F ANOVA) entre o dia e a noite do que a verificada entre os meses, o que reforça a necessidade de amostragens durante o dia e a noite. A rede capéchade foi eficiente na captura de indivíduos demersais e pelágicos com ampla faixa de tamanho.

ABSTRACT. We use two taxonomic indexes to assess the variability of the taxonomic structure and diversity of the ichthyofauna of two low-energy environments in southern Brazil and to compare the temporal patterns of these two ichthyofaunas. Sampling was conducted in the infralittoral zones of Maciel (Paranaguá Bay, PR) and Indio Beach (Norte Bay of Florianópolis, SC). A fyke net was set up at a depth of 0.5 to 2.0 m and left in place for 48 h for each of the samplings. A total of two diurnal and two nocturnal samplings were conducted monthly per one year. The ichthyofaunas at the two sites exhibited similar temporal dynamics, with their abundance and biomass presenting a tendency to increase with increasing temperature during the spring and summer months. A total of 113 species were captured, of which 47 were present at both sites. Harengula clupeola, Sphoeroides testudineus and S. greeleyi were especially abundant at both sites. The co-occurring species displayed similar day and night occupancy trends. In all seasons, the obtained values for the average taxonomic distinctness and variation in taxonomic distinctness were within the confidence intervals. The seasonal reproduction and recruitment patterns led to slight changes in taxonomic distinctness during the year, which were within the expected intervals. Keywords: ichthyofauna, taxonomic distinctness, nycthemeral dynamics, sheltered beach, southern Brazil.Comparación de los patrones taxonómicos y temporales de la ictiofauna capturada con red fyke en dos ambientes protegidos en el sur de Brasil RESUMEN. Se utilizaron dos índices taxonómicos para evaluar la variabilidad de la estructura taxonómica y diversidad de la ictiofauna en dos ambientes de baja energía en el sur de Brasil, así como para comparar sus patrones temporales. Los muestreos se realizaron en las zonas infralitoral de Maciel (Bahía de Paranaguá, PR) e Indio Beach (Bahía Norte, SC). Se instaló una "fyke net" a una profundidad de 0,5 a 2 m, durante 48 h, para cada uno de los muestreos. Durante un año se realizó un total de dos muestreos diurnos y dos nocturnos. La ictiofauna en los dos sitios mostró dinámicas temporales similares, con su abundancia y biomasa presentando una tendencia a aumentar con el incremento de la temperatura durante los meses de primavera y verano. Un total de 113 especies fueron capturadas, de los cuales 47 estuvieron presentes en ambos sitios. Harengula clupeola, Sphoeroides testudineus y S. greeleyi fueron especialmente abundantes en ambos sitios. Las especies coexistentes mostraron tendencias similares de ocupación tanto de día como de noche. En todas las estaciones, los valores obtenidos para la distinción taxonómica media y para la variación en la distinción taxonómica estuvieron dentro de los intervalos de confianza. Los patrones de reproducción y reclutamiento estacionales llevaron a ligeros cambios en la distinción taxonómica durante el año, que estuvieron dentro de los intervalos esperados. Palabras clave: ictiofauna, distinción taxonómica, dinámica nictimeral, play...

A large number of fish species use the mangrove mainly due to food availability and protection against predators. The knowledge of temporal and spatial dynamics of ichthyofauna allows us to identify patterns of occupation of this ecosystem and to support the assessment and preservation of local biodiversity. In this sense, samplings were conducted in 1988 at five areas of the Itacorubi River estuary, Santa Catarina Island. A total of 3,883 specimens were collected, distributed in 21 families and 41 species with the predominance of Cetengraulis edentulus, Mugil liza, Mugil curema, Genidens genidens, Mugil gaimardianus, Eucinostomus gula, Micropogonias furnieri, Pomatomus saltatrix and Sphoeroides testudineus. On average, abundances differed between seasons and sampled areas. Differences were detected between the fish faunas of fall and winter compared to summer and spring and between sampling sites. This study identified a fish assemblage in the mangrove of the Itacorubi River with a similar structure to other estuaries of southern Brazil.

This study aimed to present a checklist of marine fishes from coastal environments of the Island of Santa Catarina, including comments on the zoogeographic affinities, conservation status of each species, and functional groups. A total of 169 fish species belonging to 30 orders and 58 families were recorded. The most speciose families were Sciaenidae, Carangidae and, Engraulidae, representing 26,62% of the recorded species. Anchoa was the richest genus, followed by Sphoeroides and Cynoscion. Most of the species have their distribution limited to the western Atlantic, and two groups of fish were distinguished according to the species distributions: 1) species occurring in the Caribbean and in the Brazilian Province; and 2) Transatlantic species. Thirteen species are critically threatened, 10 are overexploited on the Brazilian coast, and 2 are threatened by extinction. Most of the species are either marine stragglers or marine migrants, and most of them are zoobenthivores, piscivores, or both.

Variação temporal de peixes em diferentes fases ontogenéticas em uma praia abrigada da Baía Norte, Sul do Brasil Fish temporal variation in different ontogenetic stages in a sheltered beach of the Baía Norte, Southern Brazil Resumo Nos ambientes praiais, os deslocamentos diários dos peixes têm sido relacionados às suas necessidades fisiológicas e ecológicas. Por outro lado, o efeito das mudanças ontogenéticas na movimentação diuturna da ictiofauna nesta região ainda é pouco conhecido. O objetivo deste trabalho foi avaliar a variação diuturna e sazonal da ictiofauna em três estágios ontogenéticos em uma praia abrigada da Baía Norte de Florianópolis. Uma rede capéchade foi armada em uma profundidade de 0,5 m a 2 m e permaneceu por 48 horas/mês em cada uma das coletas, com despescas realizadas no amanhecer e no anoitecer, totalizando duas amostras diurnas e duas noturnas, ou seja, quatro amostras mensais ao longo de um ciclo anual. Os resultados obtidos indicam que mudanças ontogenéticas não influenciaram o padrão de ocupação diuturno da maioria das espécies. A praia do Índio apresentou elevada riqueza e abundância de juvenis, com maior número destes no verão e no outono. Adultos foram abundantes na primavera e no verão. Das espécies capturadas em maior número no estágio juvenil, Genidens barbus, Micropogonias furnieri, Sphoeroides testudineus e Selene vomer apresentaram permanência anual, com elevação nas médias de abundância no período mais quente do ano. A elevação nas médias de abundância dos adultos, provavelmente coincidindo com o período de desova da maioria das espécies, correlacionou-se positivamente com a pluviosidade.

The knowledge of the temporal and spatial dynamics in the composition of fish fauna makes it possible to identify patterns of occupation of ecosystems, providing a basis for evaluation and preservation of the local biodiversity. Monthly samplings were carried out at seven sites in a coastal lagoon, using a casting net, dip net and beach seine. A total of 4,110 individuals were collected, distributed in 23 families and 49 taxa of fish, with a predominance of Mugilliza, M.curema, Atherinellabrasiliensis, Micropogoniasfurnieri and Eucinostomusargenteus, corresponding to more than 80% total weight of all individuals caught. Regarding seasonality, greater abundances were recorded in fall, influenced by the high abundance of A.brasiliensis in this period. In addition to fall, this species was also abundant in summer. However, this pattern of dominance was different for the families Mugilidae and Gerreidae, with higher abundances in spring and summer, respectively. The highest abundances were found in the southern section of the lagoon, which are related to the high abundance of A.brasiliensis, M.liza and M.curema. In relation to the indices of average taxonomic distinctness and variation in the taxonomic distinctness, no significant differences were detected between the seasons of the year. Thus, the patterns of distribution and occurrence of fish in the lagoon were consistent with the patterns observed in Brazilian coastal lagoons and estuaries, as well as to the coastal shallow areas of the southeastern and southern regions.