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.
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.
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.
Attempting to contribute with the knowledge about the bioecological aspects conceming the youth forms of M. rurnieri (Oesmarest, 1823) and C. leiarchus (Cuvier, 1830) from Itacorubi mangrove, 15 samplings were taken from January 1988 to March 1989. Using casting and entangle nets, a total of308 individuais from these species were captured. Their abundance were: M. rurnieri N = 197 (64,0%); C.leiarchus N = 111 (36,0%). The relative frequency and range of total weights and lengths were studied. Conceming spatial distribution of the species, it was observed that M. rurnieri occurred in ali areas and C. leiarchus was not captured only in "O " area (Sertão Riv~r). Ouring the anual cyde the two species occurred jointly. The results emphasize other authors statements that consider this mangrove as a "natural growing enviroment" which is highly important for the region.
The Island of Santa Catarina is a mosaic of ecosystems of great importance for fish fauna, highlighting the presence, in the same island, of estuaries, lagoons, mangroves, rocky shores and sandy beaches. This study aimed to compare, based on species richness, fish assemblages between different ecosystems. Between 1981 and 2011, there were collected a total of 165 taxa of fish, distributed in 54 families, in six sampling sites, using casting net, sweep net, beach trawl and gill net. According to the species accumulation curve, that show the increase of the number of different species with the increase of the number of samples, for all sites, the curves of species recorded followed patterns similar to curves obtained by the Jacknife index. However, the number of species has stabilized only for samples collected in Saco dos Limões, Itacorubi Mangrove and Ratones Mangrove. Comparing the mean values of richness between sites, the highest mean value was found in Saco dos Limões, followed by Índio Beach, Conceição Lagoon, North Bay , Itacorubi and Ratones Mangroves. Using the list of species as reference, despite the differences in abundance and richness between sites, the taxonomic structure is similar between sampling sites, which supports the hypothesis that the assemblages are occurring in all sites and the differences are primarily related to the patterns of reproduction and recruitment of species and secondarily influenced by abiotic factors, especially the temperature and salinity.
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