A5019017255- Aquaculture Nutrition and Growth
- Reproductive biology and impacts on aquatic species
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Fish biology, ecology, and behavior
- Sperm and Testicular Function
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Parasite Biology and Host Interactions
- Aquaculture disease management and microbiota
- Animal Genetics and Reproduction
- Reproductive Biology and Fertility
- Essential Oils and Antimicrobial Activity
- Aquatic life and conservation
- Moringa oleifera research and applications
- Muscle Physiology and Disorders
- Turtle Biology and Conservation
- Ginger and Zingiberaceae research
- Agricultural and Food Sciences
- Carcinogens and Genotoxicity Assessment
- Rural Development and Agriculture
- Genetic diversity and population structure
- Plant Reproductive Biology
- Genetic and phenotypic traits in livestock
- Environmental Toxicology and Ecotoxicology
- Signaling Pathways in Disease
Instituto de Pesca
2024-2025
Brazilian Agricultural Research Corporation
2012-2024
Universidade Federal do Amazonas
2020-2021
Amazon (United States)
2016
Agricultural Research Corporation
2015
Universidade Estadual Paulista (Unesp)
2013
Utrecht University
2007-2012
Universidade Federal de Minas Gerais
2004-2006
Early puberty poses a significant challenge for male Atlantic salmon in aquaculture due to its negative impact on growth and welfare. The regulation of vertebrates involves 2 key reproductive hormones: follicle-stimulating hormone (FSH) luteinizing (LH) their gonadal receptors. In mice lacking FSH receptor, testes size is reduced, but fertility maintained, while medaka zebrafish with disrupted fshr gene exhibit near normal testis fertility. these fishes both Fsh Lh are present during may...
The wild boar is a natural inhabitant of Europe, Asia, and North Africa phylogenetically the ancestor domestic pig. Because its phylogenetic economic importance, this species an interesting model for studying testis function in boars. Therefore, present study was performed to investigate structure, spermatogenic cycle length, Sertoli cell (SC) efficiencies eight adult Each lasted 9.05 days, total duration spermatogenesis estimated as lasting approximately 41 days. percentages volume occupied...
Precocious male puberty significantly compromises sustainability aspects of aquaculture in a number finfish species. As part program aiming to understand and eventually control testis maturation farmed Atlantic cod, we studied the first reproductive cycle. The gonadosomatic index shows 41-fold increase from immature (August) mature (March) stages, reaching almost 10% total body weight. paired cod testes are composed several lobes arranged around central collecting duct. In each individual...
The evolution of sex determination (SD) in teleosts is amazingly dynamic, as reflected by the variety different master sex-determining genes identified. Pangasiids are economically important catfishes South Asian countries, but little known about their SD system. Here, we generated novel genomic resources for 12 and characterized Based on a Pangasianodon hypophthalmus chromosome-scale genome assembly, identified an anti-Müllerian hormone receptor type Ⅱ gene (amhr2) duplication, which was...
Background/Objectives: Lipoprotein lipase (LPL) is a key enzyme in lipid metabolism, crucial for the hydrolysis of triglycerides lipoproteins and maintaining homeostasis vertebrates. This study aims to characterize lipoprotein genes tambaqui (Colossoma macropomum) genome, investigating their evolutionary history from phylogenomic perspective. Methods: Phylogenetic syntenic analyses were used identify lpl gene copies genome expression patterns examined across different tissues. A comparative...
ABSTRACT Oxidative stress has been shown to be involved in lead and cadmium toxicity. We recently showed that the activity of antioxidant enzyme thioredoxin reductase (TrxR) is increased kidneys lead‐exposed rats. The present study evaluated blood levels (BLLs) their relationship with hematological oxidative parameters, including TrxR 50 painters, 23 battery workers 36 control subjects. Erythrocyte δ ‐aminolevulinate dehydratase ( ‐ALA‐D) its reactivation index were measured as biomarkers...
To better understand the role(s) of progestogens during early stages spermatogenesis, we carried out studies on nuclear progesterone receptor (Pgr) Atlantic salmon. Its open-reading frame shows highest similarity with other piscine Pgr proteins. When expressed in mammalian cells, salmon exhibited progestogen-specific, dose-dependent induction reporter gene expression, 17α,20β-dihydroxy-4-pregnen-3-one (DHP) showing potency. We then analyzed testicular pgr mRNA and DHP plasma levels animals...
The objective of this study is to identify the economic–financial viability, attractiveness potential, and investment risks tambaqui farming in state Amazonas, Brazil. Tambaqui main native fish Brazilian aquaculture. A survey was conducted for 240 farms, analyzed through Monte Carlo simulations. It found that fluctuation feed (US$0.49 ± 0.09 kg−1) prices (US$1.77 0.48 exerts a great influence on profitability projects. In general, results indicate it difficult make farms profitable. use...
The aim of this study was to evaluate the antimicrobial activity Lippia sidoides, Ocimum gratissimum and Zingiber officinale's essential oils against Aeromonas spp. isolates from Colossoma macropomum, determine their chemical composition. Essential were obtained through hydrodistillation composition analyzed using gas chromatography coupled mass spectrometry. evaluated by minimum inhibitory concentration (MIC) bactericidal (MBC). major compounds thymol (76.6%), p-cymene (6.3%) (E)-...
This study aimed to evaluate the effects of essential oil (EO) Lippia sidoides, Ocimum gratissimum, and Zingiber officinale in diet tambaqui (Colossoma macropomum) growth, hematological immunological parameters. The survival rate was also calculated after challenge with Aeromonas hydrophila. Seven diets containing 32 % crude protein were formulated as follows: control (0 g/kg EO), 0.625 1.25 L. sidoides EO; 5.0 O. gratissimum Z. EO, triplicate. Tambaqui fed supplemented EO did not present...
Precocious male puberty is a significant problem in Atlantic cod aquaculture. While photoperiod manipulation can inhibit testis growth, detailed analysis of effects on spermatogenesis missing. Starting July 1, 2004, prepubertal fish were exposed to different regimens indoor tanks for 17 mo. Testis histology, germ cell dynamics (proliferation and apoptosis), plasma androgen levels analyzed. In the natural light (NL) group, growth started September 2004 was completed February 2005, when 2-mo...
Tambaqui (Colossoma macropomum, Cuvier, 1818) is the most economically important native freshwater fish species in Brazil. It can reach a total length of over 1 m and weight 40 kg. The displays clear sex dimorphism growth performance, with females reaching larger sizes at harvest. In aquaculture, production monosex populations selective breeding programmes has been therefore identified as key priority.In present study, genetic linkage map was generated by double digest restriction-site...
The purpose of this study was to determine whether the aerobic training-induced fiber-type transition in different muscles is associated with alterations NFAT isoforms gene expression. We hypothesized that would be mediated by NFATc1-c3 without altering CaN Male Wistar rats (80 days old) were divided into a trained group (T; n=8) underwent an 8-wk swimming endurance training program (5 days/week) and control (C; n=8). After experimental period, animals sacrificed, soleus (SOL) plantaris (PL)...