Population Structure of the Freshwater Crab Trichodactylus Fluviatilis Latreille, 1828 (Decapoda, Trichodactylidae) in Ubatuba, Northern Coast of Sao Paulo State, Brazil

2002 ◽  
pp. 179-182 ◽  
Author(s):  
Daniela Trigueirinho Alarcon ◽  
Maria Helena Arruda de Leme ◽  
Valter José Cobo
Keyword(s):  
Population Structure ◽  
Sao Paulo ◽  
Northern Coast ◽  
São Paulo ◽  
Freshwater Crab ◽  
Paulo State ◽  
São Paulo State

Reproductive biology and population structure of Potimirim brasiliana Villalobos, 1959 (Decapoda, Atyidae) from a littoral fast-flowing stream, São Paulo State, Brazil

Crustaceana ◽  
2013 ◽  
Vol 86 (1) ◽  
pp. 67-83 ◽  
Author(s):  
Sergio Schwarz Da Rocha ◽  
Roberto Munehisa Shimizu ◽  
Sergio L. De Siqueira Bueno ◽  
Fernando L. Mantelatto
Keyword(s):  
Population Structure ◽  
Reproductive Biology ◽  
Sao Paulo ◽  
São Paulo ◽  
Paulo State ◽  
São Paulo State ◽  
Flowing Stream

scholarly journals The structure of rocky reef fish assemblages across a nearshore to coastal islands' gradient in Southeastern Brazil

2012 ◽  
Vol 10 (2) ◽  
pp. 369-382 ◽  
Author(s):  
Fernando Zaniolo Gibran ◽  
Rodrigo Leão de Moura
Keyword(s):  
Fish Assemblages ◽  
Sao Paulo ◽  
Southeastern Brazil ◽  
Northern Coast ◽  
Fish Assemblage Structure ◽  
São Paulo ◽  
Study Region ◽  
Paulo State ◽  
Rocky Reefs ◽  
São Paulo State

Local assemblages of fishes associated with reefs are influenced by interactions among the availability of larvae and survival of recruits with subsequent biotic and abiotic forcing, as well as by periodic and episodic disturbances of varying natures and magnitudes. Therefore, besides being structurally heterogeneous and patchily distributed, reef systems are strongly context-dependent due to the influence of a broad array of ecological processes. In order to assess interactions of local factors that influence the distribution and abundance of reef fishes within a coastal mosaic of rocky reefs, we tested the null hypothesis of no significant variation in fish assemblage structure, by comparing 33 sites along the northern coast of the São Paulo State, Southeastern Brazil. Replicated stationary visual census samples (n = 396) were obtained at different distances from the coast, depths and wave exposures, including the mainland, three relatively small coastal islands, and the two margins of a wide channel between the mainland and the large São Sebastião Island (~350 km²), totaling 225 h of SCUBA diving. The regional rocky shore fish fauna comprised 106 species (41 families), with preponderance of diurnal mobile-invertebrate feeders. Samples from the outer margin of the São Sebastião Island, together with those from Alcatrazes, Búzios, and Vitória islands were significantly dissimilar from samples from the coastal sites at the São Sebastião Channel. Species richness tended to increase in a gradient from the coast to the more offshore islands. Local conditions such as depth and other habitat characteristics also influenced fish assemblages' structure. Distance from coast and depth were the main predictors for fish assemblages, followed by water transparency, temperature and benthic cover. This study represents the first regional-scale assessment of fish assemblages associated with rocky reefs in the São Paulo State coast, filling a major geographic knowledge gap in the South Atlantic. As the study region is experiencing fast coastal development and growing threats from seaport expansion, oil and gas exploitation, as well as increasing fishing and tourism pressure, the understanding of the underlying factors that influence the distribution and abundance of the reef-associated biota comprises a relevant baseline for monitoring, conservation planning and management.

Two new species of Agauopsis (Halacaridae, Acari) from Southeastern Brazil

Zootaxa ◽  
2005 ◽  
Vol 994 (1) ◽  
pp. 1 ◽  
Author(s):  
ALMIR R. PEPATO ◽  
CLÁUDIO R. TIAGO
Keyword(s):  
New Species ◽  
Coarse Sand ◽  
Sao Paulo ◽  
Southeastern Brazil ◽  
Northern Coast ◽  
São Paulo ◽  
Paulo State ◽  
Two New Species ◽  
São Paulo State ◽  
Shell Debris

Mites belonging to two new species of Agauopsis (Halacaridae, Acari) were obtained from seaweed, coarse sand and coarse shell debris taken from several sites in Northern Coast of São Paulo State. Agauopsis legionium sp. nov., which belongs to the brevipalpus group and Agauopsis itassussensis sp. nov., closely related to A. okinavensis Bartsch, 1986 are described.

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