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Publications (56)
O gasto com a alimentação dos peixes é o principal custo de produção na piscicultura, e desta forma o manejo alimentar deve ser realizado de maneira precisa, evitando desperdícios. Uma forma de obter maior controle é através da automatização. Este estudo objetivou avaliar diferentes tipos de alimentadores automáticos de eixo helicoidal, dois comerc...
This study evaluated the potential of alternative treatments against larval stages of Lernaea cyprinacea. For in vitro test, the nanoemulsified oils of Pinus sp. acicule and oleoresin were evaluated, along with Biogermex® (commercial product based on citrus biomass). For this, the motility of five larvae of the same stage (nauplii or copepodite) we...
This study evaluated the performance and cold tolerance of different Nile tilapia stocks, selected at suboptimal temperature and identified alleles of microsatellite markers associated with cold tolerance. After 67 days of rearing at average temperature of 22.4°C, tilapia juveniles from different stocks were evaluated, tagged with a transponder and...
The main objective of this study was to evaluate the histological and hematological alterations of silver catfish Rhamdia quelen (Quoy & Gaimard, 1824) against intense parasitism by anchor worm Lernaea cyprinacea Linnaeus, 1758. Thirteen fish specimens were collected at the Fish Genetic Improvement Unit (EPAGRI/CEDAP), Brazil. After acclimatization...
The aim of this study was to determine the median lethal concentration LC50 24 h of formalin in Xiphophorus maculatus, Xiphophorus heleri, Oreochromis niloticus, Danio rerio, and Carassius auratus. The concentrations of 100, 150, and 200 mg L⁻¹ were tested in each fish species separately. Fish behavior was observed in the first 6 h after exposure t...
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Este estudo teve como objetivo avaliar o ganho genético para peso final, e a influência da seleção em outras variáveis zootécnicas e morfométricas, de tilápias-do-nilo selecionadas dentro de diferentes grupos genéticos, após uma geração de seleção individual. Após a seleção, cinco grupos genéticos foram amostrados para realizar o estudo. Foram real...
The toxicity of formalin on Cyprinus carpio var. koi and its anti-parasite effects against Dactylogyrus minutus (Monogenea) in in vitro tests is analyzed. Specimens of D. minutus were submitted to eight concentrations of formalin: 50, 75, 100, 125, 150, 175, 200, 250 mg L⁻¹, in triplicate. Concentrations of formalin 100, 150 and 200 mg L⁻¹ were the...
Ichthyophthiriasis is a worldwide fish disease with great financial impact on freshwater fish farming due to its associated high mortality rates. Current study assesses the parasiticidal capacity of hydrogen peroxide (H2O2) and chlorine dioxide (ClO2) against the causative agent, Ichthyophthirius multifiliis, in jundiá. Median lethal concentration...
This study aimed to characterize the metazoan parasitic fauna associated with freshwater farmed ornamental fish in Southern Brazil. Between July 2014 and January 2015, a total of 423 fish belonging to nine species were examined: Pterophylum scalare, Betta splendens, two varieties of Carassius auratus, Danio rerio, Xiphophorus helleri, two varieties...
The aim of this study is to select and isolate autochthonous bacteria with probiotic potential for use in a supplemented diet for bullfrog tadpoles, Lithobates catesbeianus. A total of 20 strains of lactic acid bacteria were isolated. Nine out of these were used in the following in vitro assays: antagonism against pathogenic bacteria (ANT), antimic...
Monogenoidea pathogenic activity can elicit various histological responses in fish. Species of Ligophorus are specific parasites of mullets, and its relationship with host fish may result in a moderate pathogenic action. In order to ascertain this relationship, estuarine mullets (Mugil liza) were collected in an estuary, reared in laboratory, for t...
A piscicultura continental é a atividade aquícola com maior representatividade em termos de produção, chegando em 2015 a 638 mil toneladas de pescado produzido1. Dentre as atividades agropecuárias, é o setor que obteve o maior crescimento nacional entre 2004 a 2014, com uma média anual de 9,85%, muito superior a outras atividades mais consolidadas,...
Acanthostomum gnerii is a digenean frenquenttly reported from intestine of Siluriformes and it is
well distributed over Central and South America. The aim of this study is to provide additional
information on morphological features of the A. gnerii by histological sections and scanning
electron microscope, as well as to provide comparative measurem...
Dietary supplementation with probiotics in animal production is an alternative to antibiotics. In frog culture, studies involving native strains of probiotic bacteria and their effects on the performance and intestinal histology of farmed animals are scarce. Therefore, this study aimed to evaluate a diet supplemented with Lactobacillus sp. in tadpo...
A new species of Tripartiella is described from the gills of the wild saddle cichlid Aequidens tetramerus in north Brazil. Wet smears of skin and gills of examined fish were air-dried at room temperature and impregnated with Klein's dry silver method for examination of the adhesive disc's structures and denticles. Total prevalence of parasitism was...
Este livro foi idealizado com o intuito de rever e atualizar conceitos sobre ranicultura.
Direcionado a especialistas na área, pesquisadores, produtores e possíveis interessados no cultivo desses anfíbios de grande interesse zootécnico, a ideia inicial surgiu durante a disciplina de Ranicultura do Departamento de Aquicultura, oferecida para o curso...
The present study describes a new species of Trichodina found in the mucus of the body surface of 137 farmed and wild silver catfish (Rhamdia quelen) located in southern Brazil and in the gills of 99 banded knife fish (Gymnotus sp.) captured in the basin of Pantanal. Smears of the body surface mucus and gills were air dried at room temperature and...
Several environmental parameters may influence biological processes of several aquatic invertebrates, such as the Monogenea. Current analysis investigates oviposition, hatching success and infestation of Aphanoblastella mastigatus, a parasite of the silver catfish Rhamdia quelen at different temperatures (~ 24 and 28 °C) and salinity (by adding sod...
The metazoan parasite fauna of snooks, Centropomus parallelus and Centropomus undecimalis, cultured in southern Brazil and parasite's influence on the relative condition factor (Kn), are investigated. Snooks were parasitized by two species of gill monogeneans belonging to Rhabdosynochus (Diplectanidae) genus and by one endoparasitic digenean specie...
Representatives of Ligophorus Euzet et Suriano, 1977 were found on the gills of Mugil liza Valenciennes caught in southern Brazil. They were identified as Ligophorus uruguayense Failla Siquier et Ostrowski de Núñez, 2009 and Ligophorus saladensis Marcotegui et Martorelli, 2009, even though specific identification proved to be difficult due to incon...
The Phylum Protozoa brings together several organisms evolutionarily different that may act as ecto or endoparasites of fishes over the world being responsible for diseases, which, in turn, may lead to economical and social impacts in different countries. Apart from the recent advances for the diagnosis of fish diseases in Brazil, little is known o...
Gills of Maria-da-toca Hypleurochilus fissicornis collected at Ponta do Sambaqui–Florianópolis island–Brazil, were analyzed to describe the histopathology caused by metacercaria of Bucephalus margaritae. Gills were submitted to the routine histological techniques for embedding in paraffin and permanent mounting in Balsam and stereoscopic analysis....
This study evaluated for two years the haematological parameters and the occurrence of gill parasites in silver catfish Rhamdia quelen, farmed in the state of Santa Catarina, southern Brazil. Between March 2010 and January 2012, a total of 137 fish were caught in a fish farm to compare the haematological and parasitological analysis, during hot and...
Cucullanus tucunarensis n. sp. (Cucullanidae) is described parasitizing the peacock bass Cichla piquiti (Cichlidae) from the Tocantins River, Tocantins State, Brazil. The new species is unique and differs from all its congeners by having a tail tip provided with several sclerotized spine-like processes on its ventral side, present in both the male...
The present work morphologically characterizes Paratrichodina africana from the gills of wild and farmed Nile tilapia from Northern Brazil (eastern Amazonia). Ninety fish were captured for parasitological analysis in Macapá, State of Amapá, from a wetland area bathed by the Amazon River commonly called 'Ressaca do Zerão' (n = 52), as well as from a...
A novel and easily constructed apparatus for collecting monogenean eggs released by the parasites into the water is described and illustrated. Use of this technique may lead to a better understanding of the parasite's biology, which, in turn, may lead to the improvement of parasite management strategies in fish farms where monogeneans are potential...
Family Trichodinidae comprises ciliate protozoa distributed worldwide; they are considered some of the main parasitological agents infecting cultivated fish. However, the trichodinidae parasitizing important fish species cultured in Brazil are unknown, and more taxonomic studies on this group of parasites are required. This research morphologically...
Resumo
This study presents the first report of infection by Linguadactyloides brinkmanni Thatcher & Krytsky, 1983 (Monogenoidea, Dactylogyridae, Linguadactyloidinae) on the gills of the hybrid tambatinga ( Colossoma macropomum x Piaractus brachypomus) from fish farms from the city of Macapá, state of Amapá, eastern Amazonia, Brazil. Out of 201 hyb...
A garoupa verdadeira é apontada como potencial candidata à piscicultura marinha no Brasil. Sua fauna
parasitológica é realçada pela presença de Helicometrina nimia, um digenético com ampla distribuição
geográfica. O objetivo do presente estudo foi caracterizar morfologicamente espécimes de H. nimia,
além de investigar a validade das características...
This study characterized morphologically Trichodina heterodentata Duncan, 1977 from cultivated fingerlings of "pirarucu" Arapaima gigas in Peru. Body and gill smears were air-dried at room temperature, impregnated with silver nitrate and/or stained with gomori trichromic. Prevalence was 100%. Trichodina heterodentata was considered a medium-sized t...
In the present work Trichodina reticulata and T. nobilis (Ciliophora: Trichodinidae) are morphologically characterised from ornamental freshwater fish culture in the State of Santa Catarina, Brazil. The prevalence of infection and a list of comparative measurements are discussed. We examined "southern platyfish" Xiphophorus maculatus (n = 35), "gol...
Parasitological indexes of Austrodiplostomum compactum (Digenea, Diplostomidae) in fishes from the Paraná River, Presidente Epitácio region, state of São Paulo, Brazil, and their relationship with climate and water quality are evaluated. Fifty-one specimens of Plagioscion squamosissimus, 39 Geophagus surinamensis, 27 Hoplias malabaricus and 23 Cich...
This study characterises morphologically Trichodina heterodentata Duncan, 1977 from channel catfish, Ictalurus punctatus (Rafinesque, 1818) in the State of Santa Catarina, Brazil. Body and gill smears were air-dried at room temperature, impregnated with silver nitrate and/or stained with Giemsa. Ten characteristics were selected to compare the pres...
The orange disease is considered the main parasitosis in Perna perna mussel. It is caused by a complex life cycle bucephalid, involving three hosts, among them mollusks and fishes. With the aim of contributing to the knowledge of orange disease in mussel culture, the parasite life cycle was investigated. Experimental studies and monthly samples in...
Scanning electron microscopy was used to analyze superficial features of Gordius dimorphus Poinar, 1991, larvae that might serve as generic or specific diagnostic characters. Three adults of G. dimorphus (2 males and 1 female) were maintained under laboratory conditions until oviposition, which occurred within long strings commonly referred to as e...
