Development and evaluation of a stress challenge testing methodology for assessment of Nile tilapia (<i>Oreochromis niloticus</i>, Linn.) fry quality

MacNiven, A.; Little, David C.

doi:10.1046/j.1365-2109.2001.00574.x

Cited by 21 publications

(12 citation statements)

References 16 publications

(17 reference statements)

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“…The authors also pointed out that the toxicity of this chemical is more for smaller animals, and that frog tadpoles are more sensitive than most species of fish and aquatic invertebrates. Other studies determined the LC 50-96h of formaldehyde for other aquatic organisms in a static system as 429.68 mg L ¡1 for Nile tilapia (Oreochromis niloticus), [34] 48.8 mg L ¡1 for rainbow trout (Oncorynchus mykiss), and 21.78 mg L ¡1 for the American catfish (Ictalurus punctatus). [28] The data indicate that the bullfrog is a very sensitive species compared with these fish species.…”

Section: Discussionmentioning

confidence: 99%

Median lethal concentration of formaldehyde and its genotoxic potential in bullfrog tadpoles (Lithobates catesbeianus)

Santana¹,

Reis²,

Teixeira³

et al. 2015

Journal of Environmental Science and Health, Part B

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In order to avoid that contaminated frog farms animals escaping in the environment and become potential vector of emergent diseases, studies with disinfection protocol are strictly necessary. The formaldehyde is one of the compounds tested in fungal disinfection protocols and also used in aquaculture. This study aimed to determine the median lethal concentration (LC50-96h) of formaldehyde in bullfrog tadpoles and to evaluate the possible genotoxic effects in acute exposition. Accordingly, the animals were exposed to formaldehyde in the concentrations of 6, 9, 12, 15, and 18 mg L(-1), and after 96 h blood samples were drawn for the micronucleus (MN) test. The LC50-96h was 10.53 mg L(-1), and the MN frequency increased in proportion to the formaldehyde concentrations, with an estimated frequency in the negative control being 1.35 MN/individual. We concluded that formaldehyde is genotoxic to tadpoles of bullfrogs in the tested concentrations, and the choice of this chemical should be contemplated before its use in animals in captivity.

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Section: Discussionmentioning

confidence: 99%

Median lethal concentration of formaldehyde and its genotoxic potential in bullfrog tadpoles (Lithobates catesbeianus)

Santana¹,

Reis²,

Teixeira³

et al. 2015

Journal of Environmental Science and Health, Part B

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“…Also, similar to that previously reported in other studies (Fasakin et al, 2003;Karapanagiotidis et al, 2014;Ogunji, Kloas, Wirth, Neumann, et al, 2008;Sing et al, 2014), overall survival was good during the 32-day experimental period. Significant differences in survival were more likely explained by the stress related to frequent sampling and handling which would have more deeply affected the smaller fish (Bolivar, Jimenez, Sugue, & Brown, 2004;MacNiven & Little, 2001); indeed, although initial weights were not significantly different between treatments, the fish stocked at a slightly smaller size had significantly lower survival rates than the larger fish. In addition, in comparison with other treatments, the significantly lower survival of MM30-fed fish could explain the slightly (but not significant) better weight gain and SGR (11.8 ± 1.9 g/fish and 3.7 ± 0.4% per day, respectively) probably owing to a reduction of the competition for the resources.…”

Section: Discussionmentioning

confidence: 99%

Growth performance, feed utilization and body composition of advanced nursing Nile tilapia (Oreochromis niloticus) fed diets containing Black Soldier Fly (Hermetia illucens) larvae meal

et al. 2017

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A 32‐day experiment was conducted to evaluate the effects on the performance, feed utilization efficiency and body composition of a strategic inclusion of Black Soldier Fly larvae meal (MM) in a commercially formulated diet for advance nursing Nile tilapia (Oreochromis niloticus). Four isonitrogenous and isoenergetic diets were commercially formulated and manufactured as a control and three test diets with strategic inclusions of MM inclusions (0, 30, 50 and 80 g/kg) and poultry by‐product meal substituting gradually three conventional expensive feedstuffs: fish meal, fish oil and soybean meal. Fish (5.7 ± 0.5 g/fish) were nursed in a cage‐in‐lake system (Volta Lake, Ghana), under conditions similar to commercial farming practices. Control and experimental diets were fed to triplicate cages by hand to visual satiety, six times per day. Growth performance (final weight; weight gain and SGR), feed utilization efficiency indices (FCR and PER) and feed intake were not significantly different (p ≥ .05) between treatments. Survival was significantly different (p < .05) but more likely explained by the stress related to frequent handling on the smaller fish. Fish whole body composition (dry matter, crude protein, lipid, ash and fibre) was unaffected by the treatment (p ≥ .05), except for the fatty acid compositions which mirrored that of the diets.

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“…Stress has been identified to have a considerable effect on the physiological responses of fish (Adams 1990) and can produce sub‐lethal effects such as reduction in growth, limited reproduction and immune incompetence. These effects make stress a major issue for fish quality (MacNiven & Little 2001). The results from the salinity challenge in 0 mg L −1 salinity show a significant improvement in survival of MOS‐treated larvae.…”

Section: Discussionmentioning

confidence: 99%

Dietary supplementation of mannan oligosaccharide on white sea bream (Diplodus sargus L.) larvae: effects on development, gut morphology and salinity tolerance

Dimitroglou

Davies

Sweetman³

et al. 2010

Aquaculture Research

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The in£uence of dietary mannan oligosaccharide (MOS) on the development, gut integrity and quality (in respect of stamina and survivability) of white sea bream Diplodus sargus L. larvae was investigated. White sea bream larvae were held under appropriate rearing conditions and fed Artemia, enriched by A1 DHA Selco TM with the addition or absence of MOS (Bio-Mos s ). The results indicated that larval growth performance and survivability were not a¡ected by the MOS supplementation. Light microscopy revealed that MOS supplementation signi¢cantly improved the intestinal morphology by increasing the villi surface area by over 12%. Transmission electron microscopy revealed that MOS supplementation increased the microvilli length by 26% compared with the control. Salinity challenge experiments showed that MOS signi¢cantly increased larval stamina and survival in both 0 and 60 mg L À 1 salinity water by 13% and 22.9% respectively. These improvements in the larval quality at the early stages of ¢sh development are important for the e⁄ciency of intensive hatchery production. E¡ect of MOS supplementation on white sea bream larvae A Dimitroglou et al. r 2010 The Authors Journal Compilation r 2010 Blackwell Publishing Ltd, Aquaculture Research, 41, e245^e251 e247 19.08 AE 1.43 min 23.44 AE 1.44 min 0.020 AU, arbitrary units; MOS, mannan oligosaccharide; PR, perimeter ratio. E¡ect of MOS supplementation on white sea bream larvae A Dimitroglou et al.

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Development and evaluation of a stress challenge testing methodology for assessment of Nile tilapia (Oreochromis niloticus, Linn.) fry quality

Cited by 21 publications

References 16 publications

Median lethal concentration of formaldehyde and its genotoxic potential in bullfrog tadpoles (Lithobates catesbeianus)

Median lethal concentration of formaldehyde and its genotoxic potential in bullfrog tadpoles (Lithobates catesbeianus)

Growth performance, feed utilization and body composition of advanced nursing Nile tilapia (Oreochromis niloticus) fed diets containing Black Soldier Fly (Hermetia illucens) larvae meal

Dietary supplementation of mannan oligosaccharide on white sea bream (Diplodus sargus L.) larvae: effects on development, gut morphology and salinity tolerance

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