Abundance and spatial-temporal distribution of the shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae): an exploited species in southeast Brazil

Abstract This study evaluated the abundance and spatial-temporal distribution of the shrimp Xiphopenaeus kroyeri in the coastal region of Macaé, state of Rio de Janeiro, southeastern Brazil. Monthly samples were obtained from March 2008 to February 2010 in six stations located in Inner (5, 10 and 15m depth) and Outer (25, 35 and 45m depth) areas. It was used a commercial fishery boat equipped with an otter-trawl net (3.5 m mouth width, mesh size 20mm and 15mm in the cod end). Water samples were taken for determination of temperature and salinity, and sediment samples for determination of texture and organic matter content. A total of 7146 shrimps were sampled. About 95% of all shrimps were caught in the shallow area, i.e., depths <20m. Greatest abundances were recorded in winter and spring. No significant correlation was observed between sediment (phi) and abundance. The distribution of X. kroyeri in the studied area was closely related to seasonal cold waterfront of the South Atlantic Central Water (SACW) and temperature was the main factor affecting the species abundance.

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

Biota Neotropica ◽

10.1590/1676-0611-bn-2018-0549 ◽

2019 ◽

Vol 19 (1) ◽

Cited By ~ 2

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.

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

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201394812 ◽

2013 ◽

Vol 85 (4) ◽

pp. 1345-1356 ◽

Cited By ~ 19

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.

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Exploring the Functional Strategies Adopted by Coastal Plants Along an Ecological Gradient Using Morpho-functional Traits

Estuaries and Coasts ◽

10.1007/s12237-021-00945-y ◽

2021 ◽

Author(s):

Daniela Ciccarelli ◽

Cleusa Bona

Keyword(s):

C4 Photosynthesis ◽

Abiotic Factors ◽

Species Abundance ◽

Organic Matter Content ◽

Matter Content ◽

Strong Interactions ◽

Soil Parameters ◽

Dry Matter Content ◽

Ecological Gradient ◽

Ecological Conditions

AbstractCoastal dunes are characterised by strong interactions between biotic and abiotic factors along a short gradient from the shoreline to the inland region. We carried out an ecological analysis of the vegetation in a protected area of the Italian coast to evaluate the relationships among species abundance, the occurrence of morphoanatomical traits related to leaves, stems, and roots, and soil variables. Three transects were established perpendicular to the shoreline, with 27 plots distributed in the frontal dunes, backdunes, and temporarily wet dune slacks. An analysis based on community-weighted mean values showed that the pioneer communities of the frontal dunes were dominated by ruderals that are well adapted to the harsh ecological conditions of these environments, showing succulent leaves, high limb thickness values, and low values for leaf dry matter content (LDMC). The backdune vegetation was a mosaic of annual herbaceous and perennial shrub communities showing both ruderal and stress-tolerant strategies (clonality, sclerified leaves, high LDMC values, root phenolics) consistent with less extreme ecological conditions. The dune slack areas were dominated by plants showing adaptations to both arid and flooded environments, such as C4 photosynthesis, amphistomatic leaves, and abundant aerenchyma in the roots. The invasive status, C4 photosynthesis, leaf trichomes, and aerenchyma in the roots were significantly correlated with soil humidity, organic matter content, and pH. These results demonstrate the usefulness of anatomical traits (including root system traits) in understanding the functional strategies adopted by plants. Invasive species tended to occupy plots with high levels of soil moisture, suggesting an avoidance strategy for the harsh environmental conditions of coastal sand dunes. Finally, we suggest including information regarding root systems into coastal monitoring programs because they are directly linked to soil parameters useful in coastal dune management and protection.

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A small rainfall simulator for the determination of soil erodibility.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v35i3.16735 ◽

1987 ◽

Vol 35 (3) ◽

pp. 407-415 ◽

Cited By ~ 4

Author(s):

A. Kamphorst

Keyword(s):

Organic Matter ◽

Soil Conservation ◽

Standard Procedure ◽

Organic Matter Content ◽

Clay Content ◽

Matter Content ◽

Soil Erodibility ◽

Rainfall Simulator ◽

Highly Sensitive

A small rainfall simulator is described, which can be used in the field as well as in the laboratory for the determination of infiltration and erosion characterisitcs of soils. It is particularly suitable for soil conservation surveys, as it is light to carry and easy to handle in the field. A description is given of a standard procedure for the determination of topsoil erodibilities in the field and some results are presented. The method appears to be highly sensitive to soil properties influencing soil erodibility, such as clay content, organic matter content and soil pH. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Demersal fish community on the inner shelf of Ubatuba, southeastern Brazil

Revista Brasileira de Oceanografia ◽

10.1590/s1413-77391998000200001 ◽

1998 ◽

Vol 46 (2) ◽

pp. 93-109 ◽

Cited By ~ 24

Author(s):

Gecely R. A. Rocha ◽

Carmen L. D. B. Rossi-Wongtschowski

Keyword(s):

Continental Shelf ◽

Coastal Water ◽

Fish Community ◽

Species Abundance ◽

Fish Fauna ◽

Sampling Period ◽

Demersal Fish ◽

Southeastern Brazil ◽

Otter Trawl ◽

South Atlantic Central Water

Fluctuations in the distribution and abundance of demersal fishes collected by otter trawl on the continental shelf of Ubatuba were examined over a two-year sampling period, in an area up to 50 m depth. A total of 111 species were collected. Seasonal and annual fluctuations in species abundance were related to differences in the distribution of Coastal Water and South Atlantic Central Water masses. The demersal fish fauna in the area was divided into three ecologically distinct communities: Tropical Sciaenid, Subtropical Sciaenid, and Gerreid-Haemulid. The most important one is the Tropical Sciaenid Community, characterized by Ctenosciaena gracilicirrhus, Paralonchurus brasiliensis, and Cynoscion jamaicensis.

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Determination of Soil Nitrate and Organic Matter Content Using Portable, Filter-Based Mid-Infrared Spectroscopy

Proximal Soil Sensing ◽

10.1007/978-90-481-8859-8_12 ◽

2010 ◽

pp. 143-152 ◽

Cited By ~ 2

Author(s):

B.R. Jahn ◽

S.K. Upadhyaya

Keyword(s):

Organic Matter ◽

Infrared Spectroscopy ◽

Organic Matter Content ◽

Matter Content ◽

Soil Nitrate ◽

Mid Infrared ◽

Mid Infrared Spectroscopy

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Microbiological and faunal soil attributes of coffee cultivation under different management systems in Brazil

Brazilian Journal of Biology ◽

10.1590/1519-6984.02414 ◽

2015 ◽

Vol 75 (4) ◽

pp. 894-905 ◽

Cited By ~ 5

Author(s):

D. R. Lammel ◽

L. C. B. Azevedo ◽

A. M. Paula ◽

R. D. Armas ◽

D. Baretta ◽

...

Keyword(s):

Mycorrhizal Fungi ◽

Microbial Biomass Carbon ◽

Integrated Management ◽

Organic Matter Content ◽

Arbuscular Mycorrhizal ◽

Tropical Soils ◽

Matter Content ◽

Management Systems ◽

Southeastern Brazil ◽

Biological Parameters

Abstract Brazil is the biggest coffee producer in the world and different plantation management systems have been applied to improve sustainability and soil quality. Little is known about the environmental effects of these different management systems, therefore, the goal of this study was to use soil biological parameters as indicators of changes. Soils from plantations in Southeastern Brazil with conventional (CC), organic (OC) and integrated management systems containing intercropping of Brachiaria decumbens (IB) or Arachis pintoi (IA) were sampled. Total organic carbon (TOC), microbial biomass carbon (MBC) and nitrogen (MBN), microbial activity (C-CO2), metabolic quotient (qCO2), the enzymes dehydrogenase, urease, acid phosphatase and arylsulphatase, arbuscular mycorrhizal fungi (AMF) colonization and number of spores and soil fauna were evaluated. The greatest difference between the management systems was seen in soil organic matter content. The largest quantity of TOC was found in the OC, and the smallest was found in IA. TOC content influenced soil biological parameters. The use of all combined attributes was necessary to distinguish the four systems. Each management presented distinct faunal structure, and the data obtained with the trap method was more reliable than the TSBF (Tropical Soils) method. A canonic correlation analysis showed that Isopoda was correlated with TOC and the most abundant order with OC. Isoptera was the most abundant faunal order in IA and correlated with MBC. Overall, OC had higher values for most of the biological measurements and higher populations of Oligochaeta and Isopoda, corroborating with the concept that the OC is a more sustainable system.

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