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| Registros recuperados: 20 | |
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| Guidoli,Marcos Gabriel; Mendoza,Jorge Arnaldo; Falcón,Sofia Lizardo; Boehringer,Silvia Irene; Sánchez,Sebastián; Macías,María Elena Fátima Nader. |
| ABSTRACT: Probiotics are a novel alternative to antibiotics as growth factors. Previously, our group isolated, selected and tested in vivo, eight autochthonous strains. They showed no significant effects when administered individually. However, the best doses, stages and ways of administration were combined in a multi strain formula. The aim of this research was to evaluate the effect of this probiotic product on the growth and survival of Piaractus mesopotamicus larvae. The administration was implemented during egg incubation and endogenous feeding period (5), during larvae exogenous feeding period (10) and all along the experiment (15). A group without microorganisms was used as control. The probiotic generates significant increments of mean weight and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactic acid bacteria; Bacillus; Pacú; Larviculture. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700652 |
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| Frías-Quintana,Carlos Alfonso; Álvarez-González,Carlos Alfonso; Guerrero-Zárate,Rocío; Valverde-Chavarría,Silvia; Ulloa-Rojas,Juan B.. |
| ABSTRACT Wolf cichlid, Parachromis dovii, is a species with a high potential for aquaculture in Central America; however, the knowledge of the digestive physiology in larvae period is limited. For these reason, this study evaluated the changes on digestive enzymes (alkaline and acid proteases, trypsin, chymotrypsin, aminopeptidase, carboxypeptidase, lipases, amylases, and phosphatases) during early ontogeny by biochemical analysis. All digestive enzymes were detected at first feeding (6 days after hatching, DAH, 9.49 mm, 168 degree-days DD). Afterwards all enzymes reached two main peaks in activity at 14 or 22 DAH (15.10 mm, 364 DD and 20.83 mm, 550 DD, respectively). Later, there was a gradual decrease in activity for trypsin and acid and alkaline... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larviculture; Proteases; Zymogram. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100215 |
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| MATTOS,Douglas da Cruz; SCRENCI-RIBEIRO,Rafaela; CARDOSO,Leonardo Demier; JUNIOR,Manuel Vazquez Vidal. |
| ABSTRACT The blue discus (Symphysodon aequifasciatus) is often sold for ornamental purposes. It is a neotropical cichlid from South America, which is native to the rivers of the Amazon basin of Brazil, Peru and Colombia. The purpose of this study was to characterize the reproductive behavior of S. aequifasciatus and identify features that can later be used by breeders to facilitate the handling and reproduction of this species in captivity. The experiment was divided into two stages: the first dealt with partner selection and couple formation to observe the behaviors of territoriality, pursuing, fleeing, biting, stay, protecting and cleaning of the substrate. The second stage documented mating behavior, nesting and parental care, to observe vibration,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian Fish; Ornamental Fish; Larviculture; Reproduction; Behavior. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400433 |
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| Hernández,David Roque; Santinón,Juan José; Sánchez,Sebastián; Domitrovic,Hugo Alberto. |
| The effects of the replacement of bread yeast by soybean meal in diets for Rhamdia quelen larvae on growth, survival, and intestinal morphology were analysed. Larvae were fed for 20 days with five diets: a control diet formulated with 57% of bread yeast, and other four diets in which soybean meal at concentrations of 14.25, 28.5, 42.75 and 57% was added to obtain 25, 50, 75 and 100% of bread yeast replacement. Growth and survival parameters were negatively affected by dietary soybean meal inclusion. Larvae fed control diet showed significantly higher mean weight, specific growth rate, final biomass, and survival rate than larvae from other treatments. Enterocyte height and fold width of the posterior intestine showed highest values in the control group,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larviculture; Experimental diet; Intestine; Morphology; South American catfish. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000900023 |
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| CARVALHO,Thaís Billalba; SOUZA,Ellen Cristina Monteiro de; PINHEIRO-DA-SILVA,Jaquelinne; VILLACORTA-CORREA,Marle Angélica. |
| ABSTRACT Brycon amazonicus is a native Amazonian fish that is important for aquaculture in South America. Larval mortality is high in this species in intensive breeding systems due to aggressiveness among larvae. The present study investigated experimentally the effects of body size heterogeneity on the aggressive behavior and survival of B. amazonicus during the early stages of larval development. Two treatments (larvae groups with homogeneous and heterogeneous body size) were evaluated throughout early larval stages tested at six time points: 12, 24, 36, 48, 60 and 72 hours after hatching (HAH). Two experiments quantified, respectively, aggressive interactions and mortality rates among larvae at each time point. The frequency of aggressive interactions... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggressiveness; Fish; Larviculture; Mortality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000400304 |
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| LUZ,RONALD K.; PORTELLA,MARIA CÉLIA. |
| The aim of this work was to investigate the effects of daily prey concentration during the first 15 days of active feeding of Hoplias lacerdae larvae, and the juvenile size on the feed training. In the first phase, the larvae received five Artemia nauplii concentrations (P). In the second phase, the juveniles from each treatment were trained to accept formulated diet. Superior growth was related to higher initial daily prey concentrations (900 and 1100 nauplii larvae-1). During feed training, the growth tendency was similar to that verified in the first phase. The lowest values of specific growth rate (SGR) were registered after the introduction of the semi-moist diet used in the feed training. However, the values of SGR recovered along the experiment and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia; Feeding management; Larviculture; Formulated diet. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000201125 |
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| Oliveira,Isabela Bacalhau de; Lavander,Henrique David; Lima,Priscilla Celes Maciel de; Oliveira,Carlos Yure Barbosa de; Dantas,Danielli Matias de Macedo; Gálvez,Alfredo Olivera. |
| ABSTRACT: Anomalocardia brasiliana post-larvae were cultured for 28 days to evaluate the effect of stocking density on their growth and survival rate. Three stocking densities were tested 40, 80 and 160 post-larvae cm-2, in experimental units (2-L) with static cultivation system and total water renewal at each 48 hours. The experimental design was completely randomized with three treatments and three repetitions each. Stocking density of 40 post-larvae cm-2 reached 1 mm length within 24 days, while only 18% of the post-larvae at density of 80 post-larvae cm-2 reached 1 mm length in the same time. The density of 40 post-larvae cm-2 had the highest specific growth rate, 4.98±0.08% day-1. The survival rates of post-larvae at lower densities were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Clams; Larviculture; Microalgae; West Indian pointed venus. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200652 |
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| Luz,R.K.; Santos,J.C.E.; Pedreira,M.M.; Teixeira,E.A.. |
| The effects of different water flow rates and feed training on the production of "pacamã" Lophiosilurus alexandri juveniles were evaluated. In the first experiment, nine day post-hatch larvae (n= 2,400) were stocked at a density of 5 larvae/L. Different water flow (F) rates were tested: F1 = 180; F2 = 600; F3 = 1,300; and F4 = 2,600mL/min. Artemia nauplii were offered as food during the first 15 days of active feeding. In the second experiment for feed training, 720 juveniles (total length of 22.2mm) were stocked at a density of 1.5 juveniles/L. A water flow rate similar to F1 was used. The use of extruded dry diet was tested, and feed training was done with and without other enhanced flavors (Artemia nauplii or Scott emulsion). The water flow rates did... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feed training; Juvenile production; Larviculture; Lophiosilurus alexandri; Water flow. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000400024 |
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| Turini, Caio Silva; Universidade Federal de Santa Catarina; Sühnel, Simone; Universidade Federal de Santa Catarina; Lagreze-Squella, Francisco José; Universidade Federal de Santa Catarina; Ferreira, Jaime Fernando; Universidade Federal de Santa Catarina; Melo, Claudio Manoel Rodrigues de; Universidade Federal de Santa Catarina. |
| This study evaluated the effects of larval densities, cultured in flow-through system, in the yield and quantity of larvae. The first experiment compared the larval yield of a flowthrough system (80 larvae mL-1) and a batch system (8 larvae mL-1), which resulted in a higher yield and number of larvae in the flowthrough system, after 23 days. The second experiment compared two larval densities (20 and 45 larvae mL-1) in flowthrough system. The densities affected the yield after 15 and 23 days and the larvae final quantity after all tested times (8, 15, and 23 days). After 23 days of larviculture, the yield was highest for 20 larvae mL-1 and the larval number for 45 larvae mL-1. The third experiment also compared two larval densities (100 and 150 larvae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.06.03.00-0 bivalve mollusc; Yield; Larviculture; Density. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23685 |
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| Schütz,Jackson Haroldo; Nuñer,Alex Pires de Oliveira. |
| The effect of food and photoperiod on dorado (Salminus brasiliensis) post-larvae growth and survival was investigated using the following treatments: LD (Light: Dark) 24:0 + Artemia nauplii (A), LD 24:0 + fish prey (F), LD 14:10 + A, LD 14:10 + F, LD 0:24 +A and LD 0:24 + F. Prochilodus lineatus larvae were used as fish prey. Higher survival rates were registered in fish prey treatments (P<0.05) and were not influenced by photoperiod whereas in Artemia treatments, the survival was very low, but directly proportional to light increase (P<0.05). The better growth in LD 0:24 was related to a safe-energy strategy that reduced energy consumption whereas in LD 24:0, the higher energy consumption reduced the growth. In intermediate photoperiod, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dorado; Food type; Larviculture; Photoperiod; Salminus brasiliensis. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300010 |
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| Hernández,David Roque; Agüero,Carlos Hernán; Santinón,Juan José; González,Alfredo Oscar; Sánchez,Sebastián. |
| The pacu (Piaractus mesopotamicus) is a neotropical freshwater fish. It is one of the most important species farmed in areas of the Parana and Paraguay Rivers basins. The effects of different rearing protocols on growth, survival and incidence of skeletal malformations in pacu larvae were analyzed. A total of six experimental treatments were considered, consisting of: a semi-intensive larviculture (LS) in ponds; intensive larviculture (LIn) in laboratory (both LS and LIn until 60 days of life); and mixed larviculture, with 20 days of semi-intensive larviculture into cages in ponds after 14 (L1), 21 (L2), 33 (L3) or 40 (L4) days of laboratory larviculture. At the end of the experimental period, LSlarvae showed higher growth rate, with average weight values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Piaractus mesopotamicus; Larviculture; Retention; Bone malformations. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000901667 |
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| Côrtes, Guilherme de Freitas; Universidade Federal de Santa Catarina; Tsuzuki, Monica Yumi; Universidade Federal de Santa Catarina; Costa Melo, Emílio Mateus. |
| Ciliate protozoa of the genus Euplotes commonly appears contaminating mass cultures of rotifers but also with potential to be used as live food in the larviculture of marine fish. To obtain a monoculture of Euplotes sp., three diets were tested: 1) microalgae Nannochloropsis oculata, 2) commercial diet for rotifers Culture Selco 3000, and 3) baker’s yeast (Saccharomyces cerevisiae). The ciliates were inoculated at 10 ind. mL-¹. On day 5, protozoa densities in the groups fed the commercial diet (1,911.0 ± 248.7 ind. mL-¹) and the baker’s yeast (2,600.0 ± 195.3 ind. mL-1) did not differ, but were higher than the group fed microalgae (2.0 ± 1.4 ind. mL-1) (p < 0.05). On day 6, the density in the group fed baker’s yeast was higher (15,484.0 ± 1,164.9... |
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Palavras-chave: 2.03.00.00-0 live food; Production; Microalgae; Rotifers; Larviculture; Marine fish Aquicultura. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/11795 |
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| Luz,Ronald Kennedy; Ribeiro,Paula Adriane Perez; Ikeda,Aline Leite; Santos,André Eduardo Heringer; Melillo Filho,Reinaldo; Turra,Eduardo Maldonado; Teixeira,Edgar de Alencar. |
| The objective of this study was to evaluate the effect of different levels of diet crude protein on the performance and stress resistance rate (Re) of Oreochromis niloticus larvae and fingerlings. In the first experiment, 5, 15 and 25 day-old animals were submitted to 1, 5, 7, 10, 15, 20, 30 and 40 minutes of air exposure on a sieve. In the second experiment, tilapia larvae were fed with 32, 40 and 55% crude protein (CP) diets. Animals after 15 and 30 days of feeding (21 and 36 days of life, respectively) were submitted to the air exposure test for 7 and 10 minutes. Re was estimated based on survival 24 hours after the tests. In the first experiment, it was observed that 5-day-old animals were more resistant than animals with 10 and 20 days of feeding (15... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Air exposure; Feeding; Larviculture; Oreochromis niloticus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200031 |
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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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| Pedreira,Marcelo Mattos; Costa,Deliane Cristina; Schorer,Marianne. |
| ABSTRACT: This research aimed to verify the influence of the photoperiod on the performance and survival piabanha-of-Pardo (Brycon vonoi) larvae. Piabanha-of-Pardo larvae 24 hours post-hatch, with body weight of 2.44 ± 0.02mg, and total length of 7.82 ± 0.46mm, were subjected to five different photoperiods: 0L:24D, 6L:18D, 12L:12D, 18L:6D and 24L:0D (871.12 ± 92.65 lux). Daily, the water temperature, dissolved oxygen (DO), percentage of oxygen saturation, pH, and water conductivity were monitored, and presented similar water quality values among tanks with distinct photoperiods, and within the range considered appropriate for the genus Brycon larvae. Piabanha-of-Pardo larvae have better productive performance and survival rate at longer photoperiods, over... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brycon vonoi; Growth; Larviculture; Luminosity; Survival. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100402 |
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| Registros recuperados: 20 | |
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