A Preliminary Study on the Effect of Feeding Frequency on Survival and Growth Rate of Catla Catla Post Larvae

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dc.contributor.authorDasanayake, P.D.M.V.D.K.
dc.contributor.authorLiyange, N.P.P.
dc.contributor.authorJayawardana, S.
dc.date.accessioned2022-02-22T07:26:59Z
dc.date.available2022-02-22T07:26:59Z
dc.date.issued2013
dc.description.abstractFeed management is a very important part in larval rearing in terms of optimization of feeding rate and frequency is become imperative in the culture of marine and freshwater fishes and it has become one of the crucial areas of research in the field of aquaculture. By controlling the optimum feeding frequency, farmers can successfully reduce the feed cost and maximize growth and also able to manage other factors such as individual size variation and water qualities which are deemed important in rearing of fish in culture conditions. Different species of fish have been shown to have different optimum feeding frequencies. There are numerous reports available on the nutritional requirements and use of practical diets for Indian Carp species but limited information is available on feeding schedules for Catla (Catla catla).There is a need to know what feeding frequency is optimal, in terms of production. The objective of this study was to evaluate the effects of different feeding frequencies on growth performance and survival of Catla (Catlacatla) post larvae which will lead to better larval rearing management during the critical period of larval phase. Methodology Experimental trials were conducted at the National Aquaculture Development Authority, Carp breeding centre, Udawalawa. A total of 1500 (approximately) 5 day old Catla (Catla catla) post larvae (PL) obtained from hatchery jar of the breeding centre. Selected PL were divided equally into fifteen 50 l glass tanks and 100 fish were housed in each glass aquaria. Average wet weight was recorded as 0.0007±0.000031 g and average total length recorded as 0.7±0.042 cm. The stocking density was two PL per one liter of water. Post larvae in treatment F4were fed four times a day while those of group F3, F2 and F1 were fed thrice, twice and once a day respectively. F0 was the controller and those larvae were not fed. The larvae were fed with soya bean milk up to 10 days and then up to 21 days they were fed with Prima commercial powder feed. Feed was offered at an allowance of 10% bodyweight (FAO, 2011) splitted equally among the allocated number of meals. Feed allowance was calculated once a week by using wet weight measurements. Satiation of feed was assumed. The duration of this study was 8 weeks and during the experiment water temperature was measured daily and pH and Nitrate concentration were measured once a week. Total length and wet weight body measurements were taken once a week and Number of survivals were calculated finally. Based on the average length, average weight increments and number of fish; the Specific growth rate, Weight gain, length gain, survival rates variables were calculated. All data were subjected to one-way analysis of variance (ANOVA) and differences between means compared by the Tukey test at a 95% confidence interval (p<0.05). Results and Discussion Mean water temperature and pH level ranged from 27-30 C and from 6-8, respectively. The mean weekly values of the lengths and weights of post larvae at each feeding frequency are shown in Figure 1 and 2, respectively. Total length increased from an initial value of 0.7± cm to final value 1.23 ± 0.1 cm in no feed group (F0) and 2.53 ± 0.11 cm in feeding frequency F4 group. Other feeding frequencies (F1-F3) had length values intermediate between the 2 extremes. There was a significant difference (P<0.05) in length values between these feeding frequencies. For weight values feeding frequency F0 had the lowest final mean weight (0.0077 ± 0.0003 g) while feeding frequency F4 had the highest mean weight value (0.101 ± 0.001).Mean weight values for other feeding frequencies (F1-F3) ranged progressively between two extremes. There was also significant difference (P<0.05) in final weight values at the different feeding frequencies.en_US
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/8412/15-AQT-A%20Preliminary%20Study%20on%20the%20Effect%20of%20Feeding%20Frequency%20on%20Survival%20and%20Growth%20.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.subjectAnimal Sciencesen_US
dc.subjectAquaculture and Fisheriesen_US
dc.subjectAquatic Resourcesen_US
dc.subjectfish Industryen_US
dc.subjectFishen_US
dc.titleA Preliminary Study on the Effect of Feeding Frequency on Survival and Growth Rate of Catla Catla Post Larvaeen_US
dc.title.alternativeResearch Symposium 2013en_US
dc.typeOtheren_US
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