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| Registros recuperados: 15 | |
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| Anido,Rodrigo Vargas; Zaniboni-Filho,Evoy; Garcia,Alexandre Sachsida; Baggio,Sueli Regina; Fracalossi,Débora Machado. |
| Knowledge about gonad fatty acid composition is important for broodstock diet formulation. This study characterized ovary fatty acid composition of wild female jundiá catfish (Rhamdia quelen) in their different gonadal maturation stages. Female jundiá (n = 36, average weight= 383.8 + 208.8 g) were captured in the rio Uruguay, comprising all seasons. Ovaries were extracted and classified according to their gonadal maturation stage. Gonad-somatic ratio varied significantly among seasons, being higher in spring (3.7), followed by summer (2.2), winter (0.9) and autumn (0.6). Main fatty acids groups detected were: saturated (SFA= 35.5%), monounsaturated (MUFA= 28.1%) and polyunsaturated fatty acids (PUFA= 33.5%). Over the four seasons, palmitic acid was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachidonic acid; Broodstock diet; Docosahexaenoic acid; Eicosapentaenoic acid; Gonadal maturation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200453 |
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| Ribolli,Josiane; Scaranto,Bianca Maria; Shibatta,Oscar Akio; Bombardelli,Robie Allan; Zaniboni-Filho,Evoy. |
| ABSTRACT DNA barcoding is a widely utilized molecular-based identification of species and taxonomic resolutions. Until recently, Rhamdia voulezi and Rhamdia branneri were considered species synonyms of Rhamdia quelen; however, morphological and cytogenetic analyses have suggested the validity of distinct species. Due to the absence of molecular taxonomy of R. voulezi and R. branneri, the objective of this study was to test its validity through traditional DNA barcoding and the GMYC (General Mixed Yule Coalescent) COI-based analyses in 19 specimens from the Iguaçu River Basin. In both methodologies, three MOTUs (Molecular Operational Taxonomic Units) were identified based on the estimated optimum threshold (OT = 0.77). The average inter-MOTU distance (NJ,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; COI; Jundiá; MOTU; Species complex. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100217 |
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| Silva,Patrícia Alves da; Reynalte-Tataje,David Augusto; Zaniboni-Filho,Evoy. |
| This study aims to determine the importance of different environments of the Ligeiro River (upper Uruguay River, Brazil) in fish reproduction. For this purpose, three environments (sampling sites) were selected: rapids, a pool, and the mouth of the Ligeiro River. Ichthyoplankton, zooplankton, and benthos were sampled six times per month from September, 2006 to March, 2007. Zooplankton and ichthyoplankton samples were collected early in the evening with plankton nets (64 µm and 500 µm, respectively). Benthos samples were also collected early in the evening with a Van Veen dredge. Local abiotic variables (temperature, dissolved oxygen, pH, electrical conductivity, water speed, alkalinity, water hardness, and water transparency) were measured simultaneously... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eggs; Growth sites; Ichthyoplankton; Larvae; Spawning sites. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200018 |
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| Ribolli,Josiane; Zaniboni-Filho,Evoy. |
| Supplementary stocking of fish in natural environments is a way to mitigate or compensate for the changes imposed on wild populations by river damming. Since little is known about the genetic composition of the supplementary stocks obtained by pooled-milt fertilization, the aim of this study was to determine the individual contributions of male jundiá Rhamdia quelen to offspring. Sperm from four males were mixed using equal volume of sperm from each of the males to fertilize eggs from only one female, kept in three blend with six males and three females. The proportions of larvae sired by the different males were quantified using five polymorphic DNA microsatellite loci. Analysis of these loci allowed paternal determination of 84% of the progeny, at a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jundiá; Milt pool; Paternity; Genetic diversity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400011 |
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| Spanghero,Diogo Bessa Neves; Spanghero,Emília Carolina Alencar de Medeiros; Pedron,Janaína dos Santos; Chagas,Edsandra Campos; Chaves,Francisco Célio Maia; Zaniboni-Filho,Evoy. |
| Abstract: The objective of this work was to evaluate peppermint (Mentha piperita) essential oil toxicity to and potential as an anesthetic for juvenile silver catfish (Rhamdia quelen). To determine the lethal concentration at 4 hours (LC50-4h), 210 fish (3.08±0.8 g and 7.59±0.67 cm) were exposed to 0, 20, 50, 80, 110, and 140 mg L-1 essential oil. To evaluate the anesthetic potential, nine fish were individually exposed to each oil concentration (50, 80, 110, and 140 mg L-1) used. Water quality parameters were controlled. The mortality rate and the severity and extent of the gill injuries of silver catfish juveniles at 4 hours of exposure increased with increasing peppermint essential oil concentrations, with LC50-4h estimated to be 75.06 mg L-1. The main... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mentha piperita; Rhamdia quelen; Anesthesia; Gill; Histology; Lethal concentration. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101102 |
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| Zaniboni-Filho,Evoy; Reynalte-Tataje,David; Nuñer,Alex Pires de Oliveira; Meurer,Samira. |
| This study aimed to evaluate the influence of photoperiod on juvenile suruvi (Steindachneridion scriptum) in six photoperiods: 24L-0D (L= Light; D= Dark), 18L-6D, 14L-10D, 10L-14D, 6L-18D and 0L-24D. Juveniles measuring 176.8 ± 13.2mm and weighing 60.2 ± 16.0g were distributed in eighteen 150-L aquariums, stocked with 8 juveniles per aquarium. At the end of the study, treatments 24L-0D (105.7 ± 5.8g and 845.9 ±46g) and 0L-24D (93.3 ± 4.9g and 746.4 ± 39.5g) were different (P<0.05) on weight and biomass. Survival (100 ± 0.0%) and length (212.5 ±2.5mm) were the same (P>0.05) in all the treatments. The results showed that suruvi (Steindachneridion scriptum) reached better weight and biomass in extended light periods. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Steindachneridion scriptum; Larviculture; Photoperiod; Growth. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300016 |
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| Meurer,Samira; Zaniboni-Filho,Evoy. |
| The reproductive and feeding biology of Acestrorhynchus pantaneiro were studied in the upper Uruguay River, southern Brazil. Fourteen sites were surveyed seasonally between 2000 and 2006. A total of 3,427 fish were caught, being 2,015 females and 1,412 males. The sex ratio was 1.66:1 (female:male) in lentic habitats (p<0.05), but showed equal proportion in lotic and transition habitats. Feeding activity was similar for both sexes and showed little variation along the year. The analysis of stomach contents of 2,401 stomach showed that "fish" was the most consumed resource in all different habitats, corresponding to 99% of the food in the gravimetric analyzes. The species showed a multiple spawning type with a long reproductive period, although the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding dynamic; Peixe-cachorro; Reproductive dynamic; Saicanga. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100015 |
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| Reynalte-Tataje,David Augusto; Baldisserotto,Bernardo; Zaniboni-Filho,Evoy. |
| Different pH levels of water in the incubation and larviculture of 'curimbatá' (Prochilodus lineatus) were tested to evaluate the effect of this variable on the survival and development of eggs and larvae. During incubation, pH of 5.0, 6.0, 7.0, 8.0, and 8.5 was tested. To observe the effects of pH on larvae with different hatchery histories, the following experimental design was utilised (pH incubation - pH larviculture): L 6-6; L 6-7; L 7-6; L 7-7; L 7-8; L 8-7; L 8-8; L 8.5-7, and L 8.5-8.5. At pH 5.0 and four hours after incubation, an almost total mortality of incubated eggs was seen. Eggs incubated at pH 6.0 to 8.5 had similar fertilization and survival rates at the end of incubation, although eggs and larvae incubated at pH 6.0 had a smaller... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish culture; Fish larval physiology; Fish eggs physiology; Hatchery; Water quality. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100179 |
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| Registros recuperados: 15 | |
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