scholarly journals Spatial–temporal variation of Paralonchurus brasiliensis (Actinopterygii: Sciaenidae) density in relation to some environmental factors on the inner shelf of south-eastern Brazilian coast

2011 ◽  
Vol 92 (2) ◽  
pp. 413-420 ◽  
Author(s):  
Eudriano Florêncio dos Santos Costa ◽  
Gustavo Monteiro Teixeira ◽  
Fúlvio Aurélio de Morais Freire ◽  
Adilson Fransozo
Keyword(s):  
Environmental Factors ◽  
Temporal Variation ◽  
Cold Water ◽  
Organic Matter Content ◽  
Fine Sand ◽  
Matter Content ◽  
Brazilian Coast ◽  
Monthly Basis ◽  
South Eastern ◽  
Eastern Brazil

The temporal and spatial variation of Paralonchurus brasiliensis density (fish per m2) in relation to environmental factors was studied on the coasts of Ubatuba and Caraguatatuba, south-eastern Brazil. The fish were collected by shrimp fishery trawl on a monthly basis from January to December, 2002. Seven depths were previously established and for each one the temperature, salinity, organic matter content and grain size of the sediment (φ) was measured. The seasonal analysis of temperature and salinity indicated the presence of the water masses South Atlantic Central Water (SACW) and Coastal Waters (CW) acting in the study area. A total of 29,808 fish were collected during the study period. The highest densities were registered during the summer and autumn indicating an association with CW. The fish population moved to shallow depths during the intrusion of the cold water mass, SACW. The highest densities were registered in depths where the sediment composition ranged from fine sand to silt–clay. Thus, the temperature and type of the sediment are the main environmental factors which affect the spatial–temporal variation of P. brasiliensis density in south-eastern Brazil.

scholarly journals Diversity and distribution of crustaceans from 13 sheltered sandy beaches along São Sebastião Channel, south-eastern Brazil

2001 ◽  
Vol 81 (3) ◽  
pp. 475-484 ◽  
Author(s):  
P.R. Nucci ◽  
A. Turra ◽  
E.H. Morgado
Keyword(s):  
Organic Matter ◽  
Organic Matter Content ◽  
Clay Content ◽  
Fine Sand ◽  
Sandy Beaches ◽  
Matter Content ◽  
Sediment Grain Size ◽  
Crustacean Species ◽  
South Eastern ◽  
Eastern Brazil

The crustacean species composition in the intertidal zones of 13 sheltered unconsolidated marine beaches in south-eastern Brazil is described. Fifty-three crustacean species were collected, adding 46 species to the total reported by previous studies in the same region. Decapods dominated the community, in contrast to exposed sandy beaches where peracarids normally predominate. The species were distributed irregularly among the beaches. Richness varied markedly among sites, and was positively related to a combination of factors such as fine sand grains, high organic matter content, and relatively low silt–clay content. The presence of rock fragments enabled both rocky shore and sandy beach crustaceans to occur on the same beaches. Richness and abundance of crustaceans showed no clear relationship to sediment grain size and slope, in contrast to the norm for exposed sandy beaches. The dominance of the tanaid Kalliapseudes schubarti in some areas may be a result of organic matter pollution in the region. These beaches showed higher species richness than typical sheltered and exposed sandy beaches, indicating that this sheltered, highly heterogeneous seascape is an important area for conservation.

scholarly journals Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

2005 ◽  
Vol 53 (1-2) ◽  
pp. 23-38 ◽  
Author(s):  
Rosebel C. Nalesso ◽  
Jean-Christophe Joyeux ◽  
Cintia O. Quintana ◽  
Evelise Torezani ◽  
Ana Clara Paz Otegui
Keyword(s):  
Dissolved Oxygen ◽  
Organic Matter Content ◽  
Abundant Species ◽  
Coarse Sand ◽  
Organic Content ◽  
Matter Content ◽  
Estuarine System ◽  
South Eastern ◽  
Eastern Brazil ◽  
Physico Chemical

The present work describes and analyses the structure of the macrobenthic epi- and infaunal assemblage of the estuarine system of Vitória Bay, South-eastern Brazil, from January 1998 to June 1999. Replicated sampling at intertidal and subtidal levels was conducted quarterly at ten stations. Intertidal and subtidal sediment composition was characterised. Water physico-chemical parameters were measured in situ. A total of 10,695 individuals, belonging to 144 taxa, were collected. Molluscs, crustaceans and polychaetes were the most abundant groups. The bivalves Anomalocardia brasiliana, Mytella guyanensis and M. falcata were the most abundant species. Locally, significant discharges of residential and industrial wastewater resulted in high organic content in the sediment (up to 30%) and low dissolved oxygen concentration in the water (< 1mg.l-1). Near the two entrances of the bay, high hydrodynamic activity and coarse sand reduced the detrimental effects of raw and treated sewage inputs. Species richness (S), diversity (H') and total abundance (A) decreased from outer-bay stations (22 < S < 72; 1.99 < H' < 2.85; 320 < A < 1737) towards inner-bay stations (2 < S < 45; 0.59 < H' < 2.67; 2 < A < 1317), where salinity and dissolved oxygen were lowest and organic matter content highest.

scholarly journals Influence of environmental factors on the bathymetric distribution of the flecked box crab Hepatus pudibundus (Herbst, 1785) (Crustacea: Aethroidea) in the Southeastern Brazilian coast

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Veronica Pereira Bernardes ◽  
Fernando Luis Mantelatto ◽  
Thiago Elias da Silva ◽  
Aline Nonato de Sousa ◽  
Camila Hipólito Bernardo ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Food Availability ◽  
Organic Matter Content ◽  
Temporal Distribution ◽  
Predatory Behavior ◽  
Matter Content ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Spatio Temporal

Abstract: This study evaluated the relationships between environmental factors and the spatio-temporal distribution of H. pudibundus, with the hypothesis of differential occupation in coastal areas of southeastern Brazil. The samplings took place monthly in January-December 2000 period, along nine transects from 2 to 40 m of depth, in Ubatuba region, northern coast of São Paulo. We collected 1808 individuals of H. pudibundus. The highest abundance was recorded in winter in the transects 10-25 m deep. Abundance was positively correlated with organic matter content and texture sediment (phi values). With the retreat of the South Atlantic Central Water (SACW) in autumn and winter, the sediment swirls, suspending the detritivore and filter-feeding macrofauna, increasing the food availability. Sites characterized by finer sediment offer higher food availability, besides facilitating H. pudibundus burying behavior. Due to its opportunistic predatory behavior, this species feeds on a variety of organisms, including mollusks, annelids and foraminifera, which are preys more abundant in the studied area and in sediments of finer grain size.

scholarly journals Effect of environmental factors on the abundance of decapod crustaceans from soft bottoms off southeastern Brazil

2013 ◽  
Vol 85 (4) ◽  
pp. 1345-1356 ◽  
Author(s):  
MICHELE FURLAN ◽  
ANTONIO L. CASTILHO ◽  
LISSANDRA C. FERNANDES-GOES ◽  
VIVIAN FRANSOZO ◽  
GIOVANA BERTINI ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Species Abundance ◽  
Organic Matter Content ◽  
Matter Content ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
Rocky Shores ◽  
Study Region ◽  
Factors Affecting ◽  
Fishing Boat

This study investigated the importance of variations in environmental factors affecting the abundance patterns of decapods on the southeastern Brazilian coast. Sampling was carried out monthly from January 1998 through December 1999 in Ubatumirim and Mar Virado, Ubatuba region, using a commercial shrimp fishing boat equipped with double-rig nets. Six areas adjacent to rocky shores were chosen. Bottom-water samples were collected using a Nansen bottle, to measure the temperature and salinity. Sediment samples were also obtained by means of a Van Veen grab, for determination of texture and organic-matter content. The association of environmental factors with species abundance was evaluated by Canonical Correspondence Analysis (α = 0.05). Forty-one species of Decapoda were used in the multivariate analysis. The analysis indicated that sediment texture (phi) and bottom temperature were the main factors correlated (p < 0.05) with the spatial and temporal abundance of the species. Considering the study region as faunal transition zone, including a mixture of species of both tropical and subantarctic origin, the species responded differently to environmental factors, mainly temperature. It is conceivable that the decapods adjust their distribution according to their intrinsic physiological limitations, possibly as a result of the available resources.

scholarly journals Environmental factors modulating the abundance and distribution of Callinectes danae (Decapoda: Portunidae) from two areas of the southeastern coast of Brazil

Biologia ◽  
2014 ◽  
Vol 69 (10) ◽  
Author(s):  
Bárbara Martins ◽  
Rafaela Pereira ◽  
Vivian Fransozo ◽  
Gustavo Teixeira ◽  
Michele Furlan ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Organic Matter Content ◽  
Temporal Distribution ◽  
Matter Content ◽  
Northern Coast ◽  
Spatial And Temporal Distribution ◽  
Monthly Basis ◽  
Fishing Boat ◽  
Shelf Region ◽  
Callinectes Danae

AbstractThe distribution and abundance of marine organisms are directly or indirectly a function of biotic and abiotic features such as sediment and water properties. In this study we analyzed the spatial and temporal distribution of Callinectes danae in two distinct littoral areas of the northern coast of the State of São Paulo, Brazil and associated them with local geomorphologic features and environmental factors. We collected specimens on a monthly basis, from July 2001 to June 2003, using a fishing boat equipped with double-rig net, in two locations: Ubatuba (UBA) and Caraguatatuba (CAR). Collecting was carried out in seven transects with different depths, which were further subdivided into two regions: bay region (5, 10, 15 and 20 m deep); and inner shelf region (25, 30 and 35 m deep). Samples from different periods and transects differed significantly in abundance. A positive correlation was found between the abundance of C. danae and the following parameters: temperature at the bottom, organic matter content and Phi (grain diameter). By contrast, a negative correlation was established between specimen abundance and salinity at the bottom. The total abundance was highest in 5 m deep transects in both regions. Summer was the season when individuals were least abundant in both areas. We concluded that the spatial and temporal distribution of C. danae are determined by a set of environmental factors and not just by one single factor.

Litter accession and accumulation in a Melaleuca quinquenervia (Cav.) S.T. Blake wetland in south-eastern Queensland

1994 ◽  
Vol 45 (8) ◽  
pp. 1509 ◽  
Author(s):  
M Greenway
Keyword(s):  
Seasonal Pattern ◽  
Organic Matter Content ◽  
Matter Content ◽  
Melaleuca Quinquenervia ◽  
Nitrogen And Phosphorus ◽  
High Accumulation ◽  
Litter Accumulation ◽  
South Eastern ◽  
Leaf Litterfall ◽  
Significant Difference

Litterfall and litter accumulation were investigated over two years in a Melaleuca quinquenewia wetland in south-eastern Queensland. In 1992, a seasonally wet year, litterfall was 809 � 135 g m-2 yr-1 at the floodplain site and 764 �192 g m-2 yr-1 at the riparian site, of which Melaleuca leaf litter made up 65% and 56% respectively. Litterfall was significantly lower and more variable in 1993, a drought year, being 725�106 g m-2 and 675 � 216 g m-2 year-1. There was a distinct seasonal pattern, with peak leaf litterfall occurring in spring in 1992 but extending into summer in 1993. Melaleuca leaf fall was significantly lower in 1993, possibly because drought conditions caused greater leaf longevity. Litter accumulation on the forest floor was 3457 g m-2 at the floodplain site and 2320 g m-2 at the riparian site; there was no significant difference between years, although the organic matter content of the litter was lower in 1992, possibly as a result of leaching during flooding. Carbon content decreased with decreasing particle size of the litter, whereas nitrogen and phosphorus increased. There was no evidence to suggest leaching of nitrogen or phosphorus, and the high C: N: P ratios indicate slow rates of litter decay. The high accumulation of litter mass suggests that these woody wetlands may function as nutrient sinks.

Distribution of benthic fauna in sediment grains and prop roots of a mangrove channel in south-eastern Brazil

2016 ◽  
Vol 97 (2) ◽  
pp. 377-385 ◽  
Author(s):  
Debora De Souza Silva-Camacho ◽  
Rafaela De S. Gomes ◽  
Joaquim N.S. Santos ◽  
Francisco Gerson Araújo
Keyword(s):  
Benthic Fauna ◽  
Fine Sand ◽  
Abundant Species ◽  
High Abundance ◽  
Dominant Group ◽  
Medium Sand ◽  
Spatial Partitioning ◽  
South Eastern ◽  
Eastern Brazil ◽  
Different Types

We examined the benthic fauna in four areas along a mangrove tidal channel in south-eastern Brazil, between October 2008 and August 2009. The tested hypothesis is that the most abundant groups avoid competition as they occupy different types of substrata and that the longitudinal distance from the sea also affects the occurrence of benthic fauna along the channel. We also examined the prop root epibiont fauna to describe this different community. Polychaeta was the dominant group in the sediment whereas Isopoda and Tanaidacea were the dominant groups on the prop roots. We found a tendency for higher infauna species richness and diversity in the innermost channel area during the summer. Higher abundance of epibiont fauna was also found in summer with tidal movements allowing the colonization of the prop roots of the mangrove forest by some taxa. The polychaetes Ceratocephale sp. and Laeonereis acuta had indication of habitat partitioning, with the first occurring mainly in very fine sand sediment whereas the latter preferred medium sand sediment. The microcrustaceans Chelorchestia darwini and Tanaidacea sp. 1 occurred in high abundance colonizing the prop roots. Exosphaeroma sp. was found in high abundance in infauna and epibiont fauna. The tested hypothesis of spatial partitioning of the mangrove channel by the benthic fauna was confirmed with the most abundant species occupying the substrata with different grain fractions and prop roots in different stations.

Age and growth of the snowy grouper, Epinephelus niveatus, off the Brazilian coast

2011 ◽  
Vol 92 (3) ◽  
pp. 633-641 ◽  
Author(s):  
Paulo A.S. Costa ◽  
Adriana C. Braga ◽  
Juan P. Rubinich ◽  
Antônio Olinto Ávila-da-Silva ◽  
Cassiano M. Neto
Keyword(s):  
Life Span ◽  
Positive Relationship ◽  
Growth Parameters ◽  
Age And Growth ◽  
Brazilian Coast ◽  
Von Bertalanffy ◽  
South Eastern ◽  
Otolith Analysis ◽  
Eastern Brazil ◽  
Marginal Increment

The age and growth of the snowy grouper, Epinephelus niveatus, from central and south-eastern Brazil were studied by otolith analysis from a sample of 341 specimens, ranging from 325 to 1216 mm in total length (TL) caught with bottom longlines between 1996 and 1998. Otolith length grew proportionally with the increasing TL of the fish. Marginal increment analysis indicated that a single opaque band forms each year during autumn–winter. The maximum estimated age was 54 years, which significantly extends the previously estimated life-span of 21–29 years for this species. The von Bertalanffy growth parameters for both sexes were estimated as L∞ = 1098.4 mm TL, K = 0.062 year −1 and t0 = –2.68. The study revealed differences in mean length-at-age and size at recruitment, as well as in growth parameters between the central and the south-eastern Brazilian coast, which can be attributed mainly to different fishing pressures. The snowy grouper was found at depths of 82–492 m, and showed a positive relationship between age and depth, suggesting differential movements of older fish to deeper waters.

scholarly journals Woodland Ponds as an Important Habitat of Hippeutis Complanatus (Linnaeus 1758) Occurrence - Effect of Environmental Factors and Habitat Preferences

2014 ◽  
Vol 33 (2) ◽  
Author(s):  
Aneta Spyra
Keyword(s):  
Organic Matter ◽  
Environmental Factors ◽  
Bottom Sediments ◽  
Habitat Preferences ◽  
Organic Matter Content ◽  
Matter Content ◽  
Freshwater Snails ◽  
Fallen Leaves ◽  
Woodland Ponds ◽  
Important Habitat

AbstractSpyra A. Woodland ponds as an important habitat of Hippeutis complanatus (Linnaeus 1758) occurrence - effect of environmental factors and habitat preferences. Ekológia (Bratislava), Vol. 33, No. 2, p. 101-115, 2014.In industrial areas, woodland ponds are refuges of biological diversity. The impact of environmental factors such as the physico-chemical properties of water, organic matter content in bottom sediments and various types of substratum on the occurrence of Hippeutis complanatus were assessed. In Poland, it is considered to be a species with an established but unspecified risk, deserving the status of endangered species due to the decline of wetland environments. A Canonical Correspondence Analysis (CCA) revealed associations between the distribution patterns of freshwater snails species and the concentration of nitrates (NO3) and calcium (Ca) as well as pH and the organic matter content in the bottom sediments. Based on statistical relationships, results of study suggest that the kind of substratum (Typha latifolia remains, Phragmites australis remains, fallen leaves of waterside trees) has an impact on the occurrence of freshwater snails including Hippeutis complanatus for which the preferred substratum is the fallen leaves of waterside trees and sites with a high content of organic matter in bottom sediments. The study has shown that isolated water bodies located in forest complexes can be refuges for species that occur in small numbers in other types of aquatic environments.

scholarly journals Superficial sediments and their relation to polyehaete families in a subtropieal embayment, Mexico

2015 ◽  
pp. 237-238
Author(s):  
Nuria Méndez ◽  
María Green Ruiz
Keyword(s):  
Grain Size ◽  
Organic Matter ◽  
Organic Matter Content ◽  
Fine Sand ◽  
Matter Content ◽  
Pearson’S Correlation ◽  
Pearson's Correlation ◽  
Superficial Sediments ◽  
Soft Bottoms

The soft bottoms in front of Mazatlan Bay and "Isla de la Piedra" Peninsula were studied to produce maps (depth, grain size and organic matter content in sediments). Sixty samples were óbtained with a 30 x 30 van Veen grab (4-21 m depth) and polychaetes were extracted from 21 subsamples. Grain size ranged from -1.05 phi (gravel) to 3 .81 phi (very fine sand), with fme sand predominl\ting. Organic matter content in sediment was 0.91-3.06 % (most values = 1-2 %). Thirty polychaete families (905 individuals/m2 in mean) were found, and Cirratulidae, Spionidae, Onuphidae, and Pilargiidae were domiuant. Pearson's correlation of grain size.

Sign in / Sign up

Export Citation Format

Share Document