Dietary supplement of natural carotenoid source and commercial feed on growth and colouration in freshwater ornamental fish, Poecilia sphenops

Ornamental fish is a fishery commodity that has promising business opportunities. Ornamental fish will have a high selling value if they have bright and brilliant colors. The advantage of ornamental fish is in the intensity of the color on its body. This study aims to analyze the levels of Spirulina added in feed which can increase the color intensity of the Angelfish juvenille. The method used was an experimental method Completely Randomized Design, consisting of five treatments and four replications. The parameter observed was an increase in color on the head of the fish and analyzed using Kruskal-Wallis.The results showed that giving 3% spirulina flour in commercial feed could provide the best color improvement for angelfish with an increase in color value by 3, and if discontinued addition of spirulina flour can reduce the brightness level of the angelfish.

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Detection and genetic analysis of infectious spleen and kidney necrosis virus (ISKNV) in ornamental fish from non-clinical cases: First report from India

10.1101/2020.08.12.247650 ◽

2020 ◽

Author(s):

Sabyasachi Pattanayak ◽

Anirban Paul ◽

Pramoda Kumar Kumar Sahoo

Keyword(s):

Reference Strain ◽

Phylogenetic Reconstruction ◽

Ornamental Fish ◽

Necrosis Virus ◽

Genotype I ◽

First Report ◽

Ornamental Fish Trade ◽

Poecilia Sphenops ◽

Pterophyllum Scalare ◽

Fish Trade

Infectious spleen and kidney necrosis virus (ISKNV), a type species of the genus Megalocytivirus, poses a threat to ornamental fish trade as most cases show nonspecific symptoms, thus making timely diagnosis challenging. Apparently health molly (Poecilia sphenops) and angelfish (Pterophyllum scalare) collected from two distinct geographic localities of India were screened for four genera under Iridoviridae, Megalocytivirus {ISKNV, turbot reddish body iridovirus (TRBIV) and red seabream iridovirus (RSIV); ranaviruses and Singapore grouper iridovirus; and Lymphocystivirus} through molecular approach. In total five numbers out of 17 samples (29.4%), ISKNV genome fragments were detected. A PCR assay using major capsid protein (MCP) gene was standardised to detect and differentiate infections within the Megalocytivirus genus, even without aid of sequencing. This forms the first report of ISKNV infection in ornamental fish from India. Sequence analysis of MCP gene showed that Indian isolate being 100% similar to the complete genome or reference strain of ISKNV. Phylogenetic reconstruction demonstrated the present strain belonging to ISKNV genotype I. Furthermore, structural stability of the MCP revealed this strain was more stable than ISKNV genotype II, RSIV and TRBIV at 25 degree C and pH 7.0. Thus a strong pan-India surveillance is recommended to reduce trade risk.

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Dried acetes as growth promoter for guppy (Poecilia reticulata) nutrition

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/919/1/012049 ◽

2021 ◽

Vol 919 (1) ◽

pp. 012049

Author(s):

C F Komilus ◽

N M M Mufit

Keyword(s):

Growth Performance ◽

Feed Intake ◽

Poecilia Reticulata ◽

Body Weight Gain ◽

Ornamental Fish ◽

Good Growth ◽

Growth Promoter ◽

Feed Conversion ◽

Commercial Diet ◽

Commercial Feed

Abstract Acetes is a marine shrimp that is still an under-studied source as feed ingredient for tropical ornamental fish. Ornamental fish is regarded as pet fish due to its mystic attractiveness for pet fish enthusiasts and requires good protein source to attain good growth and skin colour enhancement. The prevailing feed industry due to continuos pandemic has resulted many enthusiasts to look for alternative growth promoter as feed for guppy. The aims of this study were to determine the nutritional composition in dried Acetes and to investigate the effects of dietary dried Acetes meal on growth performance of Guppy (Poecilia reticulate). Five dietary isocaloric feeds namely Tcontrol (commercial feed only), T0 (100% commercial feed and 0% of dried Acetes.), T1 (75% commercial diet and 25% of dried Acetes spp.), T2 (50% commercial diet and 50% of dried Acetes), T3 (25% commercial diet and 75% of dried Acetes) and T4 (0% commercial diet and 100% of dried Acetes) were formulated as feed for juveniles of Guppy (Poecilia reticulata) reared in triplicates for 30 days. Growth indices like Body Weight Gain, Feed Conversion Rate, Feed Intake and Survival Rate were observed in every 10 days. Results indicated that T4 with 100% dried Acetes attained a significantly high BWG of 222.6% with low feed intake and FCR of less than 3.5. It can be concluded that inclusion of 50 to 100% dried Acetes in feed has contributed to optimal growth performance of guppy. It is also recommended that further studies on dietary Acetes could be done to examine other properties that could be further developed as superfeed for ornamental fish and thereby enhance growth and productivity of the ornamental fish industry as well as economic efficiency.

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Effect of Tubifex and Carrot Meal Combination on Color Quality of Botia Chromobotia macracanthus

E3S Web of Conferences ◽

10.1051/e3sconf/202014701007 ◽

2020 ◽

Vol 147 ◽

pp. 01007

Author(s):

Yuli Andriani ◽

Rosidah ◽

Iskandar ◽

Agus Priyadi ◽

Satria N. Firdaus

Keyword(s):

Color Change ◽

Ornamental Fish ◽

Average Score ◽

Optimum Dose ◽

Color Quality ◽

Randomized Design ◽

Commercial Feed ◽

Feed Control ◽

Average Body

Colour is the most important indicators of quality in ornamental fish, making the exploration to find new sources of pigments in ornamental fish is growing. This study aimed to determine the optimum dose of tubifex and carrot meal combination to enhance the quality of color in Botia Chromobotia macracanthus. This study was designed using Completely Randomized Design with six treatments in triplicates: a) commercial feed (control), b) 70% Tubifex + 3% carrot meal + 27% commercial feed, c) 60% Tubifex + 4% carrot meal + 36% commercial feed, d) 50% Tubifex + 5 % carrot meal + 45% commercial feed, e) 40% Tubifex + 6% carrot meal + 54% commercial feed, and f) 30% Tubifex + 7% carrot meal + 63% commercial feed. Parameters observed were color change level, which was tested using the Kruskal-Wallis method; survival rate (SR) tested using analysis of variance through the F test; and water quality. Results showed that the best color enhancement seen in treatment with 50% Tubifex + 5% carrot meal + 45% commercial feed combination with an average body color of 5.04 in Toca Colour Finder code 0605. The caudal fin color was enhanced with an average score of 3.93 in code 0805.

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