Tolerance to the air exposition test of Hoplias lacerdae larvae and juvenile during its initial development

Luz, Ronald Kennedy; Portella, Maria Célia

doi:10.1590/s1516-89132005000500009

Cited by 21 publications

(16 citation statements)

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“…However, before being submitted to the air exposure test, these two fresh water species were fed live food during the larviculture phase, suggesting the importance of food during this initial phase. For Hoplias lacerdae larvae and fingerlings, when exposed to air on drying paper, Luz & Portella (2005) observed that times similar to those for tilapia could be used; they were between 7 and 10 minutes. However, according to these authors, air exposure on drying paper is a more stressful method, due to the fact that the animals dry up.…”

Section: Resultsmentioning

confidence: 96%

“…Resistance to stress tests may, along with these variables, be a support tool to evaluate the quality of larvae and fingerlings production (Dhert et al, 1992). Amongst the stress tests, air exposure is usually used for several species (Sakakura et al, 1998;Arends et al, 1999;Benfey & Biron, 2000;Martins et al, 2000;Koven et al, 2001;Van Anholt et al, 2004;Luz & Portella, 2005;Luz, 2007;Trushenski et al, 2010), and it is efficient for the evaluation of food quality on the stress resistance rate (Ako et al, 1994;Kanazawa, 1997;Luz, 2007). These tests may point to the effects of diet on the improvement of the health of the animals (Ako et al, 1994) and indicate the lot quality through the relationship between stress resistance, growth and survival results (Luz, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Performance and stress resistance of Nile tilapias fed different crude protein levels

et al. 2012

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-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 and 25 days of life, respectively), when Re starts to decrease for longer than 7 minutes. In the second experiment, the different diets affected survival, performance and Re, and, in general, the worst results observed were the ones for the animals which received the 55% CP diet. The air exposure tests were efficient to evaluate the effect of diet on the resistance rate of Nile tilapia.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Performance and stress resistance of Nile tilapias fed different crude protein levels

et al. 2012

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“…These authors also observed that salmonids (the most sensitive group) maintained in saltwater were more sensitive to petroleum than those tested in freshwater, demonstrating that salinity also has an important effect. Several studies (Rantin et al, 1993;Luz and Portella, 2005) have reported that erythrinids, especially H. aff. malabaricus, have a high degree of resistance to environmental conditions involving hypoxia, long-term feeding deprivation and temperature extremes (Rantin et al, 1992;Rios et al, 2002;Rios et al, 2004;Petry et al, 2007), which negatively affect most of the sympatric fish species (Soares et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Effects of water-soluble fraction of petroleum on growth and prey consumption of juvenile Hoplias aff. malabaricus (Osteichthyes: Erythrinidae)

et al. 2016

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The influence of the water-soluble fraction of petroleum (WSF) on prey consumption and growth of juvenile trahira Hoplias aff. malabaricus was investigated. Juveniles were submitted to either WSF or Control treatment over 28 days, and jewel tetra Hyphessobrycon eques adults were offered daily as prey for each predator. Total prey consumption ranged from 16 to 86 individuals. Despite the initially lower prey consumption under WSF exposure, there were no significant differences in overall feeding rates between the two treatments. Water-soluble fraction of petroleum had a negative effect on the growth in length of H. aff. malabaricus juveniles. Although unaffected, prey consumption suggested a relative resistance in H. aff. malabaricus to WSF exposition and the lower growth of individuals exposed to WSF than the Control possibly reflects metabolic costs. The implications of the main findings for the individual and the food chain are discussed, including behavioral aspects and the role played by this predator in shallow aquatic systems.Keywords: body size, ecotoxicology, growth performance, juvenile trahira, predation, survival. Efeitos da fração solúvel de petróleo no crescimento e consumo em juvenis deHoplias aff. malabaricus (Osteichthyes: Erythrinidae) ResumoA influência da fração solúvel de petróleo (FSP) no consumo de presas e crescimento de juvenis da traíra Hoplias aff. malabaricus foi investigada. Os juvenis foram submetidos aos tratamentos FSP e Controle durante 28 dias, e adultos de matogrosso Hyphessobrycon eques foram oferecidos diariamente como presa para cada predador. O total de presas consumidas variou de 16 a 86 indivíduos. Apesar do menor consumo inicial de presas sob exposição de FSP, não houve diferenças significativas nas taxas de consumo entre os dois tratamentos. A FSP teve um efeito negativo no crescimento em tamanho de juvenis de H. aff. malabaricus. Embora a ausência de efeito no consumo de presas sugira uma relativa resistência de H. aff. malabaricus à exposição à FSP, o menor crescimento em tamanho dos indivíduos expostos ao poluente reflete possivelmente custos metabólicos. As implicações dos principais resultados nos níveis do organismo e da cadeia alimentar são discutidos, incluindo aspectos comportamentais e o papel desempenhado por este predador em ecossistemas aquáticos rasos.Palavras-chave: tamanho do corpo, ecotoxicologia, performance de crescimento, juvenis de traíra, predação, sobrevivência.

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“…The exposure of larvae to air for a predetermined period of time is a commonly used stress test (benFey and biron, 2000;Martins et al, 2000;koVen et al, 2001; Van anholt et al, 2004, luz andPortella, 2005;luz, 2007) and is effective in assessing the effect of food quality on the rate of stress resistance (ako et al, 1994;kanazaWa, 1997;luz, 2007;luz et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

First feeding of Eugerres brasilianus (Carapeva) larvae with Acartia tonsa (Copepod) nauplii increases survival and resistance to acute stress

Costa¹,

Carvalho²,

Passini³

et al. 2015

Bol. Ind. Anim.

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The rotifer Brachionus sp. is commonly used for larval feeding in marine fish hatcheries. The aim of this study was to evaluate whether the inclusion of Acartia tonsa nauplii in the initial diet of carapeva larvae improves their survival, growth and resistance to stress when compared to the regimen containing only rotifers. Adult copepods were collected in the wild and cultured with the microalgae Chaetoceros muelleri, Isochrysis galbana and Nannochloropsis oculata to obtain nauplii. Carapeva larvae were grown for 15 days using four treatments and three replicates: 1) Brachionus plicatilis rotifers (10 to 15/mL); 2) A. tonsa nauplii (0.25 to 0.5/mL); 3) Brachionus plicatilis rotifers (5 to 7.5/mL) + A. tonsa nauplii (0.12 to 0.25/mL), and 4) no supply of live feed. After 15 days, the carapeva larvae were subjected to stress by exposure to air for 10 seconds and then returned to the source tank to evaluate survival after 24 h. Survival and stress resistance were higher in carapeva larvae fed B. plicatilis + A. tonsa nauplii (P<0.05), 20.9 ± 11.2% and 88.9%, respectively. These results confirm the positive effect of the inclusion of copepod nauplii in the diet of fish larvae. However, more research is needed to validate these results.Keywords: hatchery, live feed, marine fish, stress resistance. ALIMENTAÇÃO INICIAL DE LARVAS DE CARAPEVA Eugerres brasilianus COM NÁUPLIOS DE COPÉPODO Acartia tonsa MELHORA A SOBREVIVÊNCIA E RESISTÊNCIA AO ESTRESSE AGUDORESUMO: O rotífero Brachionus sp. é o alimento vivo mais comumente utilizado na larvicultura de peixes marinhos. O objetivo deste estudo foi avaliar se a inclusão de náuplios de Acartia tonsa na alimentação inicial de larvas de carapeva melhora sua sobrevivência, crescimento e resistência ao estresse, comparado com o regime contendo apenas rotíferos. Copépodos adultos foram coletados no ambiente e cultivados com as microalgas Chaetoceros muelleri, Isochrysis galbana and Nannochloropsis oculata para obtenção dos náuplios. As larvas de carapeva foram cultivadas por 15 dias com quatro tratamentos e três repetições: 1) rotíferos Brachionus plicatilis (10 a 15/mL); 2) náuplios de A. tonsa (0,25 a 0,5/mL); 3) rotíferos Brachionus plicatilis (5 a 7,5/ mL) + náuplios de A. tonsa (0,12 a 0,25/mL) e 4) sem suplementação de alimento vivo. Após 15 dias, as larvas de carapeva foram submetidas a estresse por exposição ao ar, por 10 segundos e retornadas aos tanques para avaliar a sobrevivência após 24 h. As larvas alimentadas com rotífero B. plicatilis + náuplio de A. tonsa apresentaram maiores sobrevivência e resistência ao estresse (P<0,05), 20,9 ± 11,2% e 88,9%, respectivamente. Esses resultados confirmam o efeito positivo da inclusão de náuplios de copépodos na dieta de larvas de peixes. Contudo, são necessárias mais pesquisas para validar esses resultados.Palavras-chave: alimento vivo, larvicultura, peixe marinho, resistência ao estresse.

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Tolerance to the air exposition test of Hoplias lacerdae larvae and juvenile during its initial development

Abstract: ABSTRACT

Cited by 21 publications

References 21 publications

Performance and stress resistance of Nile tilapias fed different crude protein levels

Performance and stress resistance of Nile tilapias fed different crude protein levels

Effects of water-soluble fraction of petroleum on growth and prey consumption of juvenile Hoplias aff. malabaricus (Osteichthyes: Erythrinidae)

First feeding of Eugerres brasilianus (Carapeva) larvae with Acartia tonsa (Copepod) nauplii increases survival and resistance to acute stress

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