The objective this study was to evaluate the effects of dietary protein levels in pirapitinga, Piaractus brachypomus, submited to extremely acidic or alkaline pH. Juveniles were fed for 20 days with three diets with ...

The aim of this study was to determine the lethal salinity (LC50) for the yellow clam Mesodesma mactroides (Bivalvia: Mesodesmatidae) and identify histopathological alterations that could be used to diagnose structural ...

The objective of this study was to verify net ion fluxes and ammonia excretion in silver catfish transported in plastic bags at three different loading densities: 221, 286 and 365g L-1 for 5h. A water sample was collected ...

This study evaluated extracts of Condalia buxifolia as anesthetics for the silver catfish Rhamdia quelen. The effectiveness of eugenol and of the methanolic extract (ME) of C. buxifolia during the transport of this species ...

The present paper describes a new occurrence of the species Brachyhypopomus gauderio Giora and Malabarba, 2009 in the Taim Ecological Reserve, Rio Grande do Sul state, Brazil.

O presente trabalho descreve, com base em entrevistas semi-estruturadas (I = outubro de 2003 a janeiro de 2004; II = outubro de 2007 a julho de 2008), o perfil sócio-econômico dos pescadores de caniço com carretilha e ...

This study investigated the relationship between ion levels (Na+, Cl−, K+, Ca2+, and Mg2+) in the fluid phase and total chyme of the contents of the gastrointestinal tract segments of freshwater and marine–estuarine teleosts ...

This work describes the spatial-temporal variation of the relative abundance and size of Limnoperna fortunei (Dunker, 1857) collected in São Gonçalo Channel through bottom trawl with a 0.5 cm mesh, at depths between 3 and ...

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 ...

We investigated the distributional patterns of shallow-water fish and their environmental correlates along a broad spatial scale encompassing estuarine and freshwater ecosystems. Marine-vagrant species were restricted to ...

No Brasil, o cultivo de peixes de água doce é baseado em poucas espécies, a maioria introduzida de outros países ou continentes. Quando uma espécie é introduzida no ecossistema, existe o risco dela escapar para o ambiente ...

Elementos traço e majoritários foram determinados em mexilhão dourado (Limnoperna fortunei) coletados no canal São Gonçalo (Rio Grande-RS, Brasil). Digestão assistida por microondas em sistema fechado foi utilizada para ...

Twelve polymorphic and six non-polymorphic microsatellite loci were isolated and characterized from a CT–GT enriched genomic library of Lycengraulis grossidens. The number of alleles ranged from 1 to 29. The observed and ...

A visão dos problemas ambientais como conflitos entre diferentes atores sociais rejeita uma simplificadora oposição entre o “natural” e as ações “antrópicas”, que generaliza para o conjunto da sociedade padrões predatórios ...

This paper describes the size-selective predation on Limnoperna fortunei (Dunker, 1857) by Pimelodus pintado (Azpelicueta, Lundberg & Loureiro, 2008) from the time it arrived at the Mirim Lagoon basin (2005). Sampling was ...

The present study compares fish species composition, dominance, and size-structure patterns at an open sand beach area (32°15’S, 52°46’W) in Mirim Lake, RS, Brazil, estimated from samples collected with two distinct beach ...

The dusky grouper Epinephelus marginatus by fisheries is a marine species historically exploited showing slow growth, late maturation and protogynous hermaphroditism. Currently, it is considered as endangered by the IUCN. ...

In this paper, we present a summary of the current knowledge of Lycengraulis grossidens, a widely distributed coastal fish that occurs from Belize to Argentina. This species is abundant in estuaries along the Southwest ...

The whitemouth croaker Micropogonias furnieri, inhabits marine and brackish waters, and is one of the main fishery targets along the Brazilian coast. The species uses different estuarine habitats as a nursery during its ...