scholarly journals Effects of tourist visitation and supplementary feeding on fish assemblage composition on a tropical reef in the Southwestern Atlantic

2008 ◽  
Vol 6 (4) ◽  
pp. 651-656 ◽  
Author(s):  
Martina Di Iulio Ilarri ◽  
Allan Tainá de Souza ◽  
Paulo Roberto de Medeiros ◽  
Renato Grotta Grempel ◽  
Ierecê Maria de Lucena Rosa
Keyword(s):  
Fish Assemblage ◽  
Trophic Structure ◽  
Fish Assemblages ◽  
Species Abundance ◽  
Coastal Communities ◽  
Northeastern Brazil ◽  
Food Provisioning ◽  
Southwestern Atlantic ◽  
Tropical Reef ◽  
The Tropics

The effects of tourist visitation and food provisioning on fish assemblages were assessed by visual censuses (stationary technique) carried out in a tropical reef in Northeastern Brazil. Comparisons of species abundance, richness, equitability, and trophic structure in the presence (PT) and absence (AT) of tourists suggest that tourist visitation and supplementary food influenced the structure of the fish assemblage, as follows: (a) diversity, equitability and species richness were significantly higher on the AT period, while the abundance of a particular species was significantly higher during PT; (b) trophic structure differed between the AT and PT periods, omnivores being more abundant during the latter period, while mobile invertivores, piscivores, roving herbivores and territorial herbivores were significantly more abundant on AT. Reef tourism is increasingly being regarded as an alternative to generate income for human coastal communities in the tropics. Therefore, closer examination of the consequences of the various components of this activity to reef system is a necessary step to assist conservation and management initiatives.

scholarly journals Structure of 0+ juvenile fish assemblages in the modified upper stretch of the River Elbe, Czech Republic 

2014 ◽  
Vol 59 (No. 1) ◽  
pp. 35-44 ◽  
Author(s):  
Z. Valová ◽  
M. Janáč ◽  
J. Švanyga ◽  
P. Jurajda
Keyword(s):  
Species Richness ◽  
Fish Assemblage ◽  
Fish Assemblages ◽  
Juvenile Fish ◽  
Species Abundance ◽  
Shannon Index ◽  
Catch Per Unit Effort ◽  
River Elbe ◽  
Nursery Habitats ◽  
Species Richness And Abundance

In August 2007, the 0+ juvenile fish assemblage of the upper River Elbe was surveyed using electrofishing. Thirty-six localities were sampled along a 177 km long section between the towns of Verdek and Brandýs nad Labem (river km (RKM) 136–313). Four localities with natural riverbeds, 14 channelized stretches, nine beaches, and nine backwaters were sampled. Altogether, 4521 0+ juvenile fishes were caught, belonging to 26 species. A decrease in species richness and abundance was evident near Hradec Králové, while decreased species abundance was noted along the navigated stretch below Přelouč. The highest catch-per-unit-effort (CPUE), species richness, and Shannon index values were observed at beach habitats, the lowest in channelized habitats, and intermediate values in backwaters. Generally, rare beach habitats had significantly more rheophilic species than other habitats, while backwaters had significantly more eurytopic species and higher CPUE for limnophilic species. Backwaters and channel habitats, however, did not differ in any other 0+ fish assemblage parameter studied. The study demonstrated the importance of beaches for fish assemblages along navigable channels. Surprisingly, however, backwaters were not confirmed as important nursery habitats.

scholarly journals New records of reef fishes (Teleostei: Perciformes) in the Rocas Atoll Biological Reserve, off northeastern Brazil

Check List ◽  
2012 ◽  
Vol 8 (3) ◽  
pp. 584 ◽  
Author(s):  
Hudson Batista ◽  
Dráusio Veras ◽  
Paulo Oliveira ◽  
Diogo Oliveira ◽  
Mariana Tolotti ◽  
...  
Keyword(s):  
Trophic Structure ◽  
New Records ◽  
Species Abundance ◽  
Reef Fishes ◽  
Oceanic Islands ◽  
Northeastern Brazil ◽  
Northeast Brazil ◽  
Species Abundance Distribution ◽  
Abundance Distribution ◽  
Hybrid Species

Six new records of reef fish and a hybrid species are reported from Rocas Atoll, off Rio Grande do Norte State, northeast Brazil. Data on species abundance, distribution of the recorded species in Brazilian oceanic islands, trophic structure, and the occurrence of the hybrid species “Menephorus dubius” are provided.

Surf zone fish abundance and diversity at two sandy beaches separated by long rocky jetties

2012 ◽  
Vol 93 (4) ◽  
pp. 867-875 ◽  
Author(s):  
Fábio Lameiro Rodrigues ◽  
João Paes Vieira
Keyword(s):  
Fish Assemblage ◽  
Surf Zone ◽  
Fish Assemblages ◽  
Species Abundance ◽  
Sandy Beaches ◽  
Fish Abundance ◽  
Fish Assemblage Structure ◽  
Fish Community Structure ◽  
Abundance And Diversity ◽  
Odontesthes Argentinensis

In this work, we evaluated the influence of long rocky jetties (~5 km) on fish abundance and diversity between sheltered and exposed marine sandy beaches. We also described and compared the fish community structure and investigated the relationships between environmental variables and fish assemblages. Fish were collected monthly with a beach seine net from May 2001 to May 2002 at the Cassino and Mar Grosso beaches. Twenty-nine taxa were caught and the fish assemblage showed similar composition between beaches (Sj = 62.1%; %Min = 52.3%), with 18 species in common. Most of the fish were juveniles, mainly young-of-the-year with sizes ≤60 mm total length. Eight species (Trachinotus marginatus, Mugil liza, Brevoortia pectinata, Menticirrhus littoralis, Menticirrhus americanus, Odontesthes argentinensis and Oncopterus darwinii) were the most abundant, accounting for 95.6% of the total catch. At both beaches, only T. marginatus, M. liza and M. littoralis were frequent and abundant, but with some differences in their relative abundance. The canonical correspondence analysis results showed that temperature had the highest correlation with fish abundance. Seasonal changes in fish assemblage structure were evident, with a greater species diversity and abundance in the spring and summer. The overall results indicate that the presence of jetties had no effect on fish assemblages of adjacent sandy beaches. Moreover, differences between beaches were related to some species abundance and not to differences in the number and composition of species between beaches.

TERRITÓRIO EM DISPUTA NO LITORAL CEARENSE: A RESISTÊNCIA/INOVAÇÃO DO TURISMO COMUNITÁRIO DIANTE DAS AÇÕES E CONTRADIÇÕES DO ESTADO

GEOgraphia ◽  
2018 ◽  
Vol 20 (42) ◽  
pp. 101
Author(s):  
Lenilton Francisco de Assis
Keyword(s):  
State Government ◽  
Coastal Communities ◽  
Northeastern Brazil ◽  
Public Investments ◽  
Living Space ◽  
Tourism Geography ◽  
Community Tourism ◽  
Worldwide Network ◽  
Low Pay

Resumo: O litoral cearense do Nordeste brasileiro já registra várias experiências exitosas de turismo comunitário. Porém, o governo do estado continua preterindo esse potencial e subsidiando a instalação de megaempreendimentos que geram poucos empregos com baixas remunerações. Assim, as comunidades litorâneas que protagonizam o turismo comunitário ficam duplamente penalizadas, pois são deixadas à margem das políticas de turismo e seus territórios viram alvos da cobiça de visitantes atraídos pelo marketing dos investimentos públicos realizados. Tomando como estudo de caso a comunidade de Tatajuba, no município de Camocim, no Ceará, este artigo analisa a luta dos povos do mar pelo território, luta essa que não se traduz apenas na defesa do espaço de vivência, mas também na formação de uma rede de territórios solidários articulados ao mundo, que resiste/inova com a proposta do turismo comunitário.  Palavras-chave: Turismo. Território. Turismo comunitário. Geografia do turismo. Tatajuba. DISPUTED TERRITORY ON THE COAST OF CEARÁ: THE STRENGTH AND INNOVATION OF COMMUNITY TOURISM ON THE ACTIONS AND CONTRADICTIONS OF STATEAbstract: The cearense coast of Northeastern Brazil already registers several successful experiences of Community tourism. However, the state government is still neglecting this potential and subsidizing the installation of mega-enterprises that generate few jobs with low pay. Thus, the coastal communities who star the community tourism are doubly penalized because they are abandoned by tourism policies and their territories become targets of greed of visitors attracted by the marketing of public investments. Taking as a case study the community of Tatajuba, in Camocim (municipality, Ceará, Brazil), this article examines the struggle of the peoples of the sea through the territory. This fight not only translates on defense of the living space, but also it represents the formation of a worldwide network of solidary territories that resists and innovates with the proposal of community tourism.Keywords: Tourism. Territory. Community tourism. Tourism geography. Tatajuba. DISPUTA DE TERRITÓRIO EN LA COSTA DE CEARÁ: LA FUERZA/INNOVACIÓN DEL TURISMO COMUNITÁRIO SOBRE LAS ACCIONES Y LAS CONTRADICCIONES DEL ESTADOResumen: El turismo comunitario ya registra varias experiencias exitosas em la costa de Ceará en el noreste de Brasil. Sin embargo, el gobierno del estado continúa pasando por encima de este potencial y subvencionando la instalación de mega-empresas que generan pocos empleos con bajos salarios. Por lo tanto, las comunidades costeras que ofrecen el turismo comunitario son doblemente penalizadas porque quedan excluidas de las políticas de turismo y sus territorios se convierten en objeto de la codicia de los visitantes atraídos por la comercialización de las inversiones públicas. Tomando como caso de estudio la comunidad Tatajuba, en el municipio de Camocim, este artículo examina la lucha de los pueblos del mar por el territorio, lucha que no sólo se traduce en la defensa del espacio de vida, sino también en la formación de una red de territorios articulado con el mundo que resiste e innova con la propuesta del turismo comunitario.Palabras clave: Turismo. Territorio. Turismo comunitario. Geografia del turismo. Tatajuba.

scholarly journals A new species of scaly blenny of the genus Labrisomus (Actinopterygii: Labrisomidae) from the tropical West Atlantic

Zootaxa ◽  
2009 ◽  
Vol 2015 (1) ◽  
pp. 62-68 ◽  
Author(s):  
IVAN SAZIMA ◽  
ALFREDO CARVALHO-FILHO ◽  
JOÃO LUIZ GASPARINI ◽  
CRISTINA SAZIMA
Keyword(s):  
New Species ◽  
Northeastern Brazil ◽  
Dark Spot ◽  
Rocky Shores ◽  
Southwestern Atlantic ◽  
Western Atlantic ◽  
Light Blue ◽  
Dorsal Fin ◽  
Fernando De Noronha ◽  
A New Species

A new species of scaly blenny, Labrisomus conditus sp. n., is described from Fernando de Noronha Archipelago, off northeastern Brazil. It differs from its Western Atlantic congeners by the following combination of characters: nuchal cirri when depressed not reaching dorsal-fin origin, 68 to 73 lateral line scales, first and second dorsal-fin spines slightly shorter than third spine and not flexible, numerous pale dots overall (light blue in life), opercular dark spot with incomplete and diffuse broad pale margin (orange in life). The new species is a territorial bottom-dweller in rocky shores and is found among algae and in crevices at depths from 0.5 to 6 m. Labrisomus conditus sp. n. feeds mostly on crustaceans (crabs, amphipods) and molluscs (snails, bivalves). The new species increases to five the species within the genus Labrisomus recorded from Southwestern Atlantic.

scholarly journals The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Francisco S. Álvarez ◽  
Wilfredo A. Matamoros ◽  
Francisco A. Chicas
Keyword(s):  
Fish Species ◽  
Habitat Structure ◽  
Fish Assemblages ◽  
Species Abundance ◽  
Main Channel ◽  
Estuarine Fish ◽  
Species Origin ◽  
High Temperature Water ◽  
Distribution Of Fish ◽  
Temperature Water

ABSTRACT The ichthyofauna of the Río Acahuapa was analyzed sampling 17 sites that included the basin main channel and its tributaries. Fish were collected using dip-nets, seine-nets and electrofishing. Fish standard length and species abundance were recorded. Species origin and salinity tolerance criteria were used to classify fish species. Water physicochemical variables, habitat structure and sampling sites elevation were recorded. A total of 33 fish species were registered, 12.1% are primary, 45.5% are secondary and 42.4% are of marine derivation. Fish species richness declined with increase of elevation (R2=0.55, p=0.0006). Two assemblages of fishes were identified: the first one associated to sites of low elevations (19-184 masl), composed mainly of secondary and marine-estuarine fish species related with high temperature, water velocity, river width, dissolved oxygen and low sand and silt substrate cover; the second one associated to sites of middle and higher elevations (185-519 masl), composed by primary and secondary freshwater fishes related with high pH, logs and rocks substrate cover. In summary, elevation and environmental variables contributed to the composition and distribution of fish in the Río Acahuapa.

scholarly journals Brazilian tropical fishes in their southern limit of distribution: checklist of Santa Catarina’s rocky reef ichthyofauna, remarks and new records

Check List ◽  
2015 ◽  
Vol 11 (4) ◽  
pp. 1688 ◽  
Author(s):  
Antônio Batista Anderson ◽  
Alfredo Carvalho-Filho ◽  
Renato Araujo Morais ◽  
Lucas Teixeira Nunes ◽  
Juan Pablo Quimbayo ◽  
...  
Keyword(s):  
Trophic Structure ◽  
New Records ◽  
Reef Fishes ◽  
Rocky Reef ◽  
Transitional Region ◽  
Southwestern Atlantic ◽  
Stegastes Partitus ◽  
Southern Limit ◽  
First Time ◽  
Tropical Ichthyofauna

We present a checklist of 278 species of reef fishes recorded along the coastline of Santa Catarina state, the southernmost limit of distribution of tropical ichthyofauna on the coast of Brazil. Twelve new species records for this state are presented: Acanthurus coeruleus, Acanthurus monroviae, Apogon americanus, Cantherhines macrocerus, Chaetodon sedentarius, Chromis flavicauda, Clepticus brasiliensis, Decapterus punctatus, Gymnothorax vicinus, Herpetoichthys regius, Muraena retifera and Stegastes partitus. Stegastes partitus and H. regius are reported for the first time, respectively, from the Southwestern Atlantic and for the coastal part of this region, while Acanthurus monroviae is reported for the second time for the Southwestern Atlantic. We present habitat distribution, trophic structure and comment on biogeographic affinities of this transitional region, discussing both remarkable species presences and absences.

scholarly journals Trophic structure of a nektobenthic community exploited by a multispecific bottom trawling fishery in Northeastern Brazil

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246491
Author(s):  
Alex Souza Lira ◽  
Flávia Lucena-Frédou ◽  
Frédéric Ménard ◽  
Thierry Frédou ◽  
Júlio Guazzelli Gonzalez ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Benthic Invertebrates ◽  
Trophic Structure ◽  
Fish Fauna ◽  
Cumulative Effects ◽  
Northeastern Brazil ◽  
Population Parameters ◽  
Bottom Trawling ◽  
Trophic Pathways

We used complementary stable isotope (SIA) and stomach content (SCA) analyses to investigate feeding relationships among species of the nektobenthic communities and the potential ecological effects of the bottom trawling of a coastal ecosystem in northeastern Brazil. Carbon (δ13C) and nitrogen (δ15N) compositions were determined for five basal sources and 28 consumers, from zooplankton to shrimp and fish species. Fishes and basal sources showed a broad range of δ15N (fishes: 6.49–14.94‰; sources: 2.58–6.79‰) and δ13C values (fishes: -23.86 to -13.71‰; sources: -24.32 to -13.53‰), while shrimps and crabs exhibited similar nitrogen and carbon ratios. Six trophic consumer groups were determined among zooplankton, crustaceans and fishes by SIA, with trophic pathways associated mostly with benthic sources. SCA results indicated a preference for benthic invertebrates, mainly worms, crabs and shrimps, as prey for the fish fauna, highlighting their importance in the food web. In overall, differences between SCA and the SIA approaches were observed, except for groups composed mainly for shrimps and some species of high δ15N values, mostly piscivorous and zoobenthivores. Given the absence of regulation for bottom trawling activities in the area, the cumulative effects of trawling on population parameters, species composition, potentially decreasing the abundance of benthic preys (e.g., shrimps, worms and crabs) may lead to changes in the trophic structure potentially affect the food web and the sustainability of the fishery.

Adult and larval fish assemblages vary among small tributary mouths of Green Bay, Lake Michigan

2021 ◽  
Author(s):  
Amelia T McReynolds ◽  
Megan L. Hoff ◽  
Angelena A. Sikora ◽  
Cynthia I. Nau ◽  
Michael J. Pietraszek ◽  
...  
Keyword(s):  
Fish Assemblage ◽  
Lake Michigan ◽  
Fish Assemblages ◽  
Water Movement ◽  
Larval Fish ◽  
Spatial Dynamics ◽  
Spatial And Temporal Variation ◽  
Adult Fish ◽  
Green Bay ◽  
Small Tributary

Small tributaries of the Great Lakes serve as important habitat during critical life stages of many fish species, though temporal and spatial dynamics of the assemblage that uses these systems are seldom investigated. This study quantifies larval and adult fish assemblages captured by fyke net and light traps among small tributary mouths of Green Bay, Lake Michigan. Ten tributaries harbored a total of forty-five species representing seventeen families, with the most abundant including spottail shiner (Notropis hudsonius (Clinton 1824)) in adult assemblages and white sucker (Catostomus commersonii (Lacepède 1803)) in larval assemblages. Larval fish assemblage structures differed over five biweekly sampling events in May and June. Adult fish assemblage structures varied among tributaries but not among spring, summer, and fall samples. Larval and adult species assemblages at these rivermouths are likely influenced by hydrology, habitat structure, and species-specific ecology. Water movement may transport larvae into rivermouths, as larval assemblages were dominated by species that spawn in coastal habitats. Adult species richness varied with longitude, with the greatest diversity in tributaries on the west shore. This investigation of fish assemblages highlights the spatial and temporal variation that occurs in these systems and their role in shaping fish populations in Green Bay.

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