Length Weight Relationship (LWR) and Condition Factor (K) of Brown Trout, Salmo trutta fario

Jan, Muddasir; Jan, Neelofar; Ahmed, Imtiaz

doi:10.18311/jeoh/2018/19992

Cited by 7 publications

(6 citation statements)

References 9 publications

(11 reference statements)

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“…In the present study, changes in the HSI indicate how the different diets affect the liver health of the cobia. An increase in HSI might suggest liver enlargement, which could be due to increased energy storage, detoxification, or other metabolic processes as the results shows in the present study when the fish were fed with the formulated diet [30,31]. Conversely, a decrease in HSI indicates that the liver is under less stress and the fish are allocating energy more toward growth, hence the frozen fresh fish is better suited for the cobia HSI needs.…”

Section: Discussionsupporting

confidence: 48%

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Effects of Formulated Diet and Frozen Fresh Fish on Growth, Serum Biochemical Indexes, Liver Antioxidant, and Lipid Metabolism of Juvenile Cobia (Rachycentron canadum)

Huang,

Chen,

Jin

et al. 2023

Aquaculture Research

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Feed is the main source of material and energy for farmed fish, and its nutritional value and balance are important factors affecting fish’s growth rate and physical health. In order to explore the effects of two different feed sources on the growth, serum biochemical indexes, liver antioxidant capacity, and lipid metabolism of young cobia fish, 300 young cobia fish with an initial body weight of 43.14 ± 1.25 g were selected for the experiment and randomly divided into two treatments. Each treatment had five replicates, and each replicate had 30 fish. They were fed with formulated feed and frozen fresh fish, respectively, for 12 weeks. The results showed that the weight gain rate, specific growth rate, and feed conversion rate of juvenile cobia fish fed with formulated diet were extremely significantly lower than those of the frozen fresh fish group ( P < 0.01 ), and condition factor was significantly lower than that of the frozen fresh fish group ( P < 0.05 ). However, protein efficiency rate, hepatosomatic index, and viscerosomatic index were significantly higher than those of frozen fresh fish group ( P < 0.05 ). The content of water, crude protein, and crude ash in the whole fish had no significant difference ( P > 0.05 ), while the content of crude lipid decreased significantly ( P < 0.05 ). The serum aspartate aminotransferase activity and sugar content of cobia in the formulated diet group were significantly higher than those in the frozen fresh fish group ( P < 0.05 ). In contrast, the total cholesterol, triglyceride content, alkaline phosphatase activity, and phosphorus content were significantly lower than those in the frozen fresh fish group ( P < 0.05 ). Compared with the frozen fresh fish group, the antioxidant enzyme activities in the liver of the formulated diet group were significantly decreased ( P < 0.05 ) except malondialdehyde (MDA) and the activity of fatty acid synthase, while there was no significant difference in the malate dehydrogenase. The study showed that under the experimental conditions, frozen fresh fish was more suitable for feeding juvenile cobia, and the formulated diet had adverse effects on the liver of juvenile cobia. Therefore, the nutritional composition of frozen fresh fish and the metabolic characteristics of cobia were used for reference to optimize and adjust the nutritional formula of juvenile cobia.

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Section: Discussionsupporting

confidence: 48%

“…HSI is a measure of the liver's relative size compared to the whole body. Changes in HSI can reflect alterations in liver health, metabolic activity, or energy allocation [30,31].…”

Section: Discussionmentioning

confidence: 99%

Effects of Formulated Diet and Frozen Fresh Fish on Growth, Serum Biochemical Indexes, Liver Antioxidant, and Lipid Metabolism of Juvenile Cobia (Rachycentron canadum)

Huang,

Chen,

Jin

et al. 2023

Aquaculture Research

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“…Cyprinid species have the highest CF just before spawning (Erk'akan et al 2013;etc. ), which is in spring, while salmonid species have the highest CF just in the period when the eel has the lowest value (Rawat et al 2014;Jan et al 2018). In this case, specimens with lower CF than others will probably not spawn, ie.…”

Section: Discussionmentioning

confidence: 99%

VARIABILITY OF LENGTH WEIGHT RELATIONSHIP AND CONDITION FACTOR OF THE EUROPEAN EEL (Anguilla anguilla L.) – CASE STUDY FROM THE LAKE SKADAR (MONTENEGRO)

MARIC¹,

BURZANOVIC²,

MARIC³

2022

AgricultForest

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The results presented contribute to the knowledge about the length-weight relationships (LWR) of the European eel (Anguilla anguilla). When using the results presented in this study, it should borne in mind that the samples were taken during the year and the number of fish examined was relatively large. LWRs parameters are calculated for the two different length classis and found significant. In the present study, bigger specimens (45 cm) of European eel have value of growth coefficient b = 3.25. This value is significantly higher than the b = 3 showing that weight of this fish increases more than cube of its length (positive growth coeffient). The lesser specimens (<45 cm) of European eel have value of growth coefficient b = 2.54, and this value is significantly smaler than the b = 3. The relationship between total length (TL) and weight (W) was described by the equation:Length <45 cm (n = 320), Y = 0.0098x 2.5398 R 2 = 0.8362 Length ≥45.1 cm (n = 346), Y = 0.0007x 3.2525 R 2 = 0.8971The values of condition factor (CF) were ranged from 0.13-0.25 (average 17.0-18.5) and smalest were found in the December.Analysis of the total sample, of any species, cannot show by what rule the population grows, if infrapopulation variability is present, because the studied value will depend on the number of individual subgroups. The estimations of LWRs shall be helpful in future works on by catch of fish species in Skadar Lake in Montenegro and Albania.

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“…The GSI and fecundity are believed to be very important measures that define the reproductive capacity of fish 36,37 . GSI could reflect the changes in the nutritional and energy status of fish while variations in the GSI and fecundity are pointers to the reproductive season of the fish and the incidence of spawning 38 . In this work, GSI was highest significantly in fish receiving the control feed which was similar to fish receiving other turmeric-supplemented feeds except for F, B, E and C. The result indicated that the inclusion of turmeric did not impose any reproductive advantage over fish on the control diet.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Dietary Turmeric on Growth and Reproductive Potentials of Female Clarias gariepinus Brood Stocks

Umanah,

David

2023

Asian J. Emerg. Res

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Background and Objective:The restricted supplies of fish seeds due to the inadequate production of quality eggs by brood stocks and the attendant poor survival of the hatchlings into high-quality fingerlings continually tend to limit the success of Clarias gariepinus culture in Nigeria. This experiment was conducted to evaluate the effects of dietary turmeric on the growth and reproductive potential of Clarias gariepinus. Materials and Methods: Eight feeds were prepared to contain in 100 g feed, turmeric as A = 0 mg, B = 80 mg, C = 160 mg, D = 240 mg, E = 320 mg, F = 400 mg, G = 480 mg and H = 560 mg treatments in a completely randomized design with 4 replicates. Feeds were served at 3% but per day for 6 weeks. In the end, each fish was induced with Ovaprim at 0.5 mL kgG 1 . The ovaries were removed, gonado-somatic index (GSI) and fecundity determined, eggs from ovary samples were fertilized and incubated, hatchlings reared for 7 days without external feeding, hatchability and survival rates were assessed and the remaining ovary for histological procedures. Results: The GSI was significantly highest in A and lowest in G. There was no significant difference in mean weight gain nominally highest in G and fecundity. The hatchability of A only differed from G and H. There was no significant superiority of turmeric feeds over non-turmeric feed in survival rate though E was nominally the best. Conclusion: Turmeric supplementation did not improve weight gain and reproductive performances in Clarias gariepinus brood stocks.

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Length Weight Relationship (LWR) and Condition Factor (K) of Brown Trout, Salmo trutta fario

Cited by 7 publications

References 9 publications

Effects of Formulated Diet and Frozen Fresh Fish on Growth, Serum Biochemical Indexes, Liver Antioxidant, and Lipid Metabolism of Juvenile Cobia (Rachycentron canadum)

Effects of Formulated Diet and Frozen Fresh Fish on Growth, Serum Biochemical Indexes, Liver Antioxidant, and Lipid Metabolism of Juvenile Cobia (Rachycentron canadum)

VARIABILITY OF LENGTH WEIGHT RELATIONSHIP AND CONDITION FACTOR OF THE EUROPEAN EEL (Anguilla anguilla L.) – CASE STUDY FROM THE LAKE SKADAR (MONTENEGRO)

The Effects of Dietary Turmeric on Growth and Reproductive Potentials of Female Clarias gariepinus Brood Stocks

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