Effect of different tank colours on some productive parameters of European catfish (Silurus glanis L.) fingerlings

Krasteva, V.; Zaikov, A.; Yankova, Maria

doi:10.15547/ast.2020.01.004

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Genotypes and associated phenotypes are not transmitted from parents to offspring, only genes are transferred [50]. The effect of the environment on colour is also noteworthy [51,52]. Previous reports show that the Chinese long snout catfish under culture had a darker hue than the wild strains [46], a situation that has also been reported in another species, the red porgy [53].…”

Section: Discussionmentioning

confidence: 99%

Phenotypic Colour Variants in Batches of Fingerlings of Clarias gariepinus from Some Commercial Fish Hatcheries

Ataguba

Garba²,

Abah³

2022

AJFAR

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Aims: This research seeks to determine the ratio of dark skin and pale skin coloured fingerlings in batches of fingerlings produced in commercial African catfish hatcheries in Makurdi, Nigeria. Study Design: The study was designed based on a structured questionnaire that was administered to farmers that were selected using random sampling from a list of African catfish farmers. Place and Duration of Study: The research was carried out in Makurdi town, Makurdi Local Government Area of Benue State, Nigeria. Data collection was done between October 2021 and January 2022. Methodology: The current study used a blend of questionnaire and physical counting to determine the proportion of dark and pale offspring from five selected fish hatcheries in Makurdi, Local Government Area of Benue State. A sample of 140 to 300 offspring was made upon each visit to the farm (i.e. batch of production) with each farm being visited at least twice depending on the production timetable. Results: Results show that the farms normally incubated a similar weight of egg (p>0.05) with the range between 258g to 550g in each batch of production. The number of fry produced was scaled to 90% and it ranged from 165075 to 351450. Percentage of dark hued offspring ranged from 80% to 86% while that of pale offspring was between 14% and 20%. There was no correlation between turbidity and the colour classification. There was no significant difference between the farms in terms of incidence of dark or pale hued fingerlings suggesting that the colour proportion is constant within batches of fingerlings. Conclusion: Dark skin colour is dominant over pale skin colour in the African catfish Clarias gariepinus and water quality does not predict skin colour in this species under culture.

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Section: Discussionmentioning

confidence: 99%

Phenotypic Colour Variants in Batches of Fingerlings of Clarias gariepinus from Some Commercial Fish Hatcheries

Ataguba

Garba²,

Abah³

2022

AJFAR

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“…In the present study, the early larval stage of snubnose pompano (0‐8DPH) performed significantly better in terms of growth (total length and weight) when reared in white and blue tanks followed by grey, yellow and red tanks. Fish species whose larvae favoured blue tanks include European catfish ( Silurus glanis L.) (Krasteva et al, 2020), false clownfish ( Amphiprion ocellaris ) (Arroyo, 2017) and snakeskin gourami ( Trichogaster pectoralis ) (Ninwichian et al, 2018). Conversely, the white tank colour has been shown to promote best growth for thinlip mullet ( Liza ramada ) larvae (El‐Sayed & El‐Ghobashy, 2011), Eurasian perch ( Perca fluviatilis ) larvae (Tamazouzt et al, 2000), haddock larvae ( Melanogrammus aeglefinus ) (Downing & Litvak, 2000), Asian catfish ( Clarius magur ) (Ferosekhan et al, 2020) and common carp ( Cyprinus carpio ) (Papoutsoglou et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Effect of tank colour on growth, survival, stress level, digestive enzymatic activities and body composition of snubnose pompano ( Trachinotus blochii Lacépède) larvae

et al. 2021

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Snubnose pompano (Trachinotus blochii, Lacépède) is a commercially important fish species that shows robust growth in captive environment. Tank colour is an important factor affecting the growth of fish larvae in aquaculture. Although the effect of tank colour has been studied in several fish species, it has not been studied in the snubnose pompano. We aimed to investigate how tank colour affects overall growth, survival, body composition, stress levels and digestive enzyme activities of snubnose pompano larvae at early larval stage and late larval stage. We noted that early–larval–stage larvae showed higher growth, crude protein contents and lower digestive enzyme activities when reared in blue and white tanks. Larvae showed low‐stress levels when reared in grey and blue tanks. The same larvae showed low‐survival and high‐stress levels when reared in red tanks. The late–larval–stage larvae showed high growth and lipids, and low‐digestive enzymes activities in white and yellow tanks. The larvae showed high‐stress levels and low‐ash contents when reared in red tanks. These differences are most likely due to the differences in light intensity inside tanks, which affects the ability of larvae to find and catch prey. Overall, our study sheds new light on cultivation conditions for snubnose pompano larvae. We recommend blue tanks for growing early–larval–stage larvae and white or yellow tanks for late‐larval‐stage larvae.

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“…Linalyl acetate and linalool are considered the primary active constituents and are responsible for the sedative effects (Denner, 2009). The lavender essential oil has shown an anesthetic effect on blue dolphin cichlid, Cyrtocara moorii (Can and Sümer, 2019), Convict cichlid Amatitlania nigrofasciata , Common carp Cyprinus carpio (Krasteva et al, 2021a), European catfish Silurus glanis (Krasteva et al, 2021b) and Rainbow trout Oncorhynchus mykiss (Metin et al, 2015). However, lavender (L. officinalis) essential oil for Convict cichlid Cichlasoma nigrofasciata showed no anesthetic effect (Raisi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Anesthetic Efficacy of Lavender and Lemongrass Essential Oils in Nile Tilapia (Oreochromis niloticus, i-Excel strain) Fry

Curay

2024

JEAR

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Anesthetics play a crucial role in aquaculture by ensuring the welfare and health of fish, facilitating various procedures, and preventing physical injuries during handling. Recently, plant- based anesthetics for fish are becoming a sustainable alternative to synthetic anesthetics in aquaculture and fisheries research. The present study examined the use of lavender (Lavandula angustifolia) and lemongrass (Cymbopogon citratus) essential oils as anesthetics for Nile tilapia Oreochromis niloticus(i-Excel strain) fry. Fish (average body weight = 0.004 g) were immersed in varying concentrations of 40, 50, 60, 70, and 80 μL L-1 and 30, 40, 50, 60, and 70 μL L-1 for lavender and lemongrass essential oils, respectively. The induction and recovery times were recorded and the best dose was determined based on rapid induction (<3-4 minutes) and quick recovery (<10 minutes). The results indicated that both essential oils exhibit dose-dependent effects on sedation and recovery. Lavender essential oil achieved optimal anesthesia at 60 μL L-1 , with an induction time of 229.3±10.7 seconds and a recovery time of 310.9±16.9 seconds, while lemongrass essential oil induced optimal anesthesia at 30 μL L-1 , with an induction time of 232.5±11.7 seconds and a recovery time of 130.5±8.6 seconds. Both concentrations for both essential oils resulted in 100.0% survival, while higher doses induced faster anesthesia and recovery but decreased survival rates. These essential oils offer cost-effective alternatives to synthetic anesthetics for short-term handling procedures; however, further research on histopathological effects and optimal transport dosages is needed.

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Effect of different tank colours on some productive parameters of European catfish (Silurus glanis L.) fingerlings

Cited by 4 publications

References 20 publications

Phenotypic Colour Variants in Batches of Fingerlings of Clarias gariepinus from Some Commercial Fish Hatcheries

Phenotypic Colour Variants in Batches of Fingerlings of Clarias gariepinus from Some Commercial Fish Hatcheries

Effect of tank colour on growth, survival, stress level, digestive enzymatic activities and body composition of snubnose pompano ( Trachinotus blochii Lacépède) larvae

Anesthetic Efficacy of Lavender and Lemongrass Essential Oils in Nile Tilapia (Oreochromis niloticus, i-Excel strain) Fry

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