Toxicidade aguda ao sal comum e larvicultura intensiva do jundiá Rhamdia quelen em água salobra

Fabregat, Thiago El Hadi Perez; Damián, J. P.; Fialho, N.S.; Costa, Deliane Cristina; Broggi, José Augusto; Pereira, R.G.; Takata, Rodrigo

doi:10.1590/1678-7660

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…However, they also affirmed the use of a 6‰ salinity for larvae after 8-12 days of hatching. Therefore, the response of the larvae to different levels of salinity may vary according to species (Luz & Santos, 2008) , 0, 0 and 0%) as salinity was increased (0, 2, 4, 6, 8, 10, 15 and 20‰, for 96 hours) throughout the experiment after 3 days of hatching and in its initial exogenous feeding stage (Fabregat et al, 2015). As in this research, Fabregat et al (2015) also recommend 2‰ water salinity in intensive larviculture of jundiá, a native Brazilian species.…”

Section: Resultsmentioning

confidence: 57%

“…Therefore, the response of the larvae to different levels of salinity may vary according to species (Luz & Santos, 2008) , 0, 0 and 0%) as salinity was increased (0, 2, 4, 6, 8, 10, 15 and 20‰, for 96 hours) throughout the experiment after 3 days of hatching and in its initial exogenous feeding stage (Fabregat et al, 2015). As in this research, Fabregat et al (2015) also recommend 2‰ water salinity in intensive larviculture of jundiá, a native Brazilian species. Altinok & Grizzle (2001) evaluated the effect of water salinity on the development of six different species of young fish and found water salinization is detrimental to channel catfish (Ictalurus punctatus) and quinguio (C. auratus).…”

Section: Resultsmentioning

confidence: 57%

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Combination of diet and water salinity in larviculture of piabanha-do-Pardo ( Brycon vonoi , Lima 2017)

et al. 2017

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1Two experiments were carried out to study piabanha-do-Pardo (Brycon vonoi) larvae development. In the first, six different diets were evaluated, being Artemia sp., plankton, feeds, feeds + Artemia sp., feeds + plankton, and Prochilodus hartii (curimba) larvae. In the second, four different water salinity levels (0, 2, 4, and 6‰) were tested. Both assays were entirely randomized design experiments, lasting for 10 days. At the end of these trials, fish biomass, survival, total length, weight, and specific growth rate were measured. Additionally, water quality, temperature, oxygen, pH, and electric conductivity measurements were made every three days. The curimba larvae diet presented higher survival rate (47.2%) and biomass weight (2.5 g) than the other diets, which were similar among each other. Piabanha-do-Pardo larvae weight, length, and specific growth rate varied with the offered diets. All water salinity treatments showed better results than those observed for fresh water. When cultivated in 2‰ salinization, larvae had 52.5% survival rates and 0.49 g biomass weight, while in the fresh water these results were 6.6% and 0.23 g, respectively. To conclude, we may identify curimba larvae as an adequate diet, and a 2‰ water salinity as recommended if Artemia sp. larvae are fed to piabanha-do-Pardo larvae. Combinações de alimentos e salinidade da água na larvicultura de piabanha-do-Pardo (Brycon vonoi, Lima 2017)Foram conduzidos dois experimentos com larvas de piabanha-do-Pardo Brycon vonoi. No primeiro ensaio, avaliaram-se seis dietas: Artemia sp., plâncton, ração, ração + Artemia sp., ração + plâncton, larvas de Prochilodus hartii (curimba). No segundo, quatro salinidades de água (0, 2, 4 e 6‰), ambos os experimentos em delineamento inteiramente casualizado, com duração de 10 dias. A biomassa, sobrevivência, comprimento total, peso e taxa de crescimento específico foram mensurados ao final dos experimentos; já os parâmetros de qualidade de água, temperatura, oxigênio, pH e condutividade elétrica foram aferidos a cada três dias. O alimento larva de curimba resultou em maior sobrevivên-cia (47,2%) e biomassa (2,5 g) do que os demais tipos, que foram similares entre si. O peso, o comprimento e a taxa de crescimento específico não diferiram entre si para as larvas alimentadas com os diversos tipos de alimento. Todos os tratamentos com salinização apresentaram melhores resultados em relação a água doce sem salinização. No entanto, quando cultivadas sob 2‰ de salinização, as larvas apresentaram 52,5% de sobrevivência e 0,49 g de biomassa, e em água doce sem salinização foram observados apenas 6,6% e 0,23 g, respectivamente. Conclui-se que a utilização de larvas de curimba como dieta é o mais adequado e recomenda-se salinizar a água com 2‰, caso seja fornecida artêmia como alimento.Palavras-chave: Artemia sp.; canibalismo; characiformes; espécie nativa; manejo alimentar; Prochilodus hartii.

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Section: Resultsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 57%

Combination of diet and water salinity in larviculture of piabanha-do-Pardo ( Brycon vonoi , Lima 2017)

et al. 2017

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“…Salinized water as a strategy for increase stocking density in Heros severus larviculture, an Amazonian ornamental fish 20 larvae L -1 in 3 g L -1 of salinized water presented the higher growth values. These results may be related to the reduction of the osmotic gradient, between farmed water and fish plasma, which leads to a reduction in energy requirement for osmoregulation (Salaro et al, 2012;Fabregat et al, 2015), redirecting that energy to other physiological processes, such as fish growth (Fisher et al, 2021;Freire and Sampaio, 2021). Furthermore, adequate levels of salinized water can reduce the toxic effect of ammonia and nitrite, contributing to improving the welfare of the fish and decrease the toxicity of the nitrogenous compounds (Sampaio et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…The used of salinized water benefits the Artemia nauplii, once it makes possible the microcrustacean to remain alive longer than in freshwater and thus, improving its availability and attractiveness to the larvae (Silva et al, 2019). In addition, the increase in water salt concentration decrease the ionic difference between water and fish plasma, which reduce the energy expenditure by freshwater fish to maintain its osmotic equilibrium (Salaro et al, 2012;Fabregat et al, 2015). The fish larval can redirected this energy to other physiological processes, such as fish growth, immunity and stress responses (Fisher et al, 2021;Freire and Sampaio, 2021).…”

Section: /8mentioning

confidence: 99%

Salinized water as a strategy for increase stocking density in Heros severus larviculture, an Amazonian ornamental fish

Oliveira¹,

Silveira²,

Nascimento³

et al. 2023

Bol. Inst. Pesca

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The aim of this study was to evaluate the effect of different salinized water (0, 3 and 6 g L-1) and stocking densities (10, 15 and 20 larvae L-1) in Heros severus larviculture. The experimental design was completely randomized, in a 3x3 factorial design, with three replicates. For this, a total of 405 larvae of H. severus were randomly distributed in 27 aquariums (1L) according to the treatments and after 15 days all the larvae were measured, weighed and counted. Higher values for final length, length gain and specific growth rate were observed in H. severus larvae raised at any stocking density tested at 3 g L-1 of salinized water (p < 0.05). The final weight and weight gain followed the same trend of the length, being higher in fish submitted to 3 g L-1 of salinized water (p < 0.05). On the other hand, the salinized water of 6 g L-1 was detrimental to larvae weight uniformity and survival rate (p < 0.05). The fish stocked at densities of 15 or 20 larvae L-1 presented the best results of final weight and weight gain (p < 0.05). The stocking density of 20 larvae L-1 in salinized water at 3 g L-1 is recommended for H. severus larviculture.

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“…However, their usefulness has still not been tested in an applied field, particularly with regard to the prediction of reproductive mode leading to diapause under controlled culture conditions. From a commercial point of view, controlled Artemia cyst production is important, given that the cysts have a high production value in fish larviculture, for example, in native marine or freshwater fish with a high commercial value, which is being developed in Central America ( Abdo-de la Parra et al, 2015 ; Palma-Cancino et al, 2019 ) and South America ( Fabregat et al, 2015 ; Luz and Portella, 2015 ; Dos Santos et al, 2016 ). In our study, we contribute new information with regard to this topic, by evaluating the expression level of eight previously described genes, in order to analyze their relationship with the diapause reproductive mode in a Chilean population characterized by high cyst production.…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Culture Conditions on Gene Expression Associated With Cyst Production in Populations of Artemia franciscana

Parraguéz

2022

Front. Genet.

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Artemia franciscana inhabits hypersaline environments in the Americas and has a well-adapted reproductive system that allows it to survive in these extreme conditions, represented by the production of diapause cysts (oviparous reproduction). This reproduction mode is controlled by numerous genes that are expressed in response to different environmental stressors, enabling this species to avoid population extinction. However, to date, the expression of these genes has not been sufficiently studied to clarify their levels in response to a combination of different environmental factors under controlled conditions. We analyzed the expression of eight genes related to oviparous reproduction (SGEG, Arp-CBP, artemin, BRCA1, p8, ArHsp21, ArHsp22, and p26) to determine their association with cyst production in two populations of A. franciscana with contrasting phenotypes, one with high (Barro Negro, BNE, Chile) and one with low (San Francisco Bay, SFB, United States) cyst production. Populations were cultured under controlled conditions of salinity (SAL, 35 and 75 ppt), photoperiod (PHO, 12L:12D and 24L:00D), iron concentration (IC, 0[Fe] and 5[Fe]), and microalgae diet (DIE; Dunaliella tertiolecta (DUN) and Tetraselmis suecica (TETRA)). Sixteen treatments were performed by combining the two conditions of each of the four factors. Data on nine reproductive parameters per female were recorded, including the percent of offspring encysted (%) (POE). The gene expression levels were analyzed by semiquantitative RT-PCR. The mean POE was significantly greater in BNE than in SFB (32.40 versus 12.74%, Mann–Whitney’s test, p < 0.05). Significantly upregulated expression of seven genes in BNE (more than twofold, p < 0.05) was observed in 38.28% of the treatments (e.g., DUN-75ppt-12L:12D-5[Fe] and TETRA-35ppt-12L:12D-5[Fe]). In SFB, seven genes showed significant differential expression, but most were downregulated in 29.69% of the treatments (e.g., DUN-75ppt-12L:12D-0[Fe] and DUN-75ppt-24L:00D-0[Fe]). Multiple regression analyses indicated that in BNE, five genes (SGEG, artemin, Arp-CBP, p8, and BRCA1) and three environmental factors (DIE, SAL, and IC) were important predictor variables for the POE response variable given that all of them were included in the highest-ranking models. In SFB, only two genes (ArHsp21 and artemin) and one environmental factor (SAL) were important explanatory variables in the highest-ranking models. It was concluded that the BNE population presented a characteristic gene expression pattern that differed from that of the SFB population. This pattern might be related to the marked oviparous reproduction of the BNE population. This gene expression pattern could be useful for monitoring the reproductive mode leading to diapause in Artemia and to assist with intensive cyst production in pond systems.

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Toxicidade aguda ao sal comum e larvicultura intensiva do jundiá Rhamdia quelen em água salobra

Abstract: Toxicidade aguda ao sal comum e larvicultura intensiva do jundiá Rhamdia quelen em água salobra [

Cited by 10 publications

References 21 publications

Combination of diet and water salinity in larviculture of piabanha-do-Pardo ( Brycon vonoi , Lima 2017)

Combination of diet and water salinity in larviculture of piabanha-do-Pardo ( Brycon vonoi , Lima 2017)

Salinized water as a strategy for increase stocking density in Heros severus larviculture, an Amazonian ornamental fish

Effect of Different Culture Conditions on Gene Expression Associated With Cyst Production in Populations of Artemia franciscana

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