The effect of temperature on clove oil anesthesia in Nile tilapia (Oreochromis niloticus)
The effect of temperature on clove oil anesthesia in Nile tilapia (Oreochromis niloticus) Sirinnapa Poomjae and Sathit Boonnom ABSTRACT: The purpose of this study was to investigate the effect of temperature on anesthesia in Nile tilapia (10.51 ± 3.38 g, 8.56 ± 1.13 cm) with clove oil. Fingerlings were individually exposed to six different concentrations (25, 50, 75, 100, 125 and 150 mg/L) at two different temperatures (26 and 30 ºC). The induction and recovery times and water quality were examined to determine the lowest effective concentration. Fingerlings were individually subjected to the lowest effective concentration to evaluate the effect of temperature on the opercular movement. The concentration of 25 mg/L was inefficiency to induce the anesthesia at all temperatures. As the temperature and concentration increased, the induction time decreased (P < 0.05). Conversely, the recovery time decreased (P < 0.05) as the temperature increased and the recovery time increased (P < 0.05) with increasing concentration. In addition, the rising temperature declined (P < 0.05) the dissolved O2, whereas the dissolved O2 elevated (P < 0.05) with rising concentration. The lowest effective concentration at 26 and 30 ºC was indicated to be 100 and 75 mg/L, respectively. At these concentrations, the opercular movement rate was rose (P < 0.05) with increasing temperature. This study demonstrates that the temperature had an effect on the efficacy of clove oil as an anesthetic in Nile tilapia. Keywords: temperature, anesthetic, clove oil, Nile tilapia Source : https://ag2.kku.ac.th/kaj/PDF.cfm?filename=105_Fis291.pdf&id=3577&keeptrack=4
Effect of duckweed (Lemna minor L.) supplementation in diet on growth of red tilapia (Oreochromis niloticus x O. mossambicus)
Effect of duckweed (Lemna minor L.) supplementation in diet on growth of red tilapia (Oreochromis niloticus x O. mossambicus) Kittisak Puycha, Supatchaya Tanee and Ratchataporn Lunsin ABSTRACT: The objective of this study was to investigate the effect of duckweed (Lemna minor L.) supplementation in 30% protein and 2,700 Kcal/Kg digestible energy feed on growth of red tilapia (Oreochromis niloticus x O. mossambicus) at 0, 5, 10 and 15%, respectively. Red tilapia, with an average initial weight of 2.93 ± 0.01 grams was randomized assign to a completely randomized design (CRD) and the experimental was run for 8 weeks. Results showed that length, body weight, Average daily gain, specific growth rate, survival rate and feed conversion ratio (FCR) were not significantly different among treatments (P>0.05). Based on this study, duckweed could supplement in the diet for red tilapia up to 15% without any effect on growth and survival rate. Moreover, it could reduce the cost of feed production of red tilapia. Keywords: Red tilapia, Duckweed, Growth Source : https://ag2.kku.ac.th/kaj/PDF.cfm?filename=792.pdf&id=3802&keeptrack=8
Study on the effect of coconut (by-product) meal and Acacia mangium leaf in diets on growth and carcass quality of nile tilapia (Oreochromis niloticus)
Study on the effect of coconut (by-product) meal and Acacia mangium leaf in diets on growth and carcass quality of nile tilapia (Oreochromis niloticus) Warrapong Nalinanon and Saichon Lerdsuwan ABSTRACT: An experiment was undertaken to obtain the optimum level of coconut and A. mangium meal of juvenile nile tilapia. The experimental design was CRD at 6 treatments 3 replications and 18 experimental units as 20 fish/unit. Treatments was mixed feed contained 6 level of coconut and A. mangium meal as 0, 20/0, 0/20, 5/15, 10/10 and 15/5 % of practical diets pellet feed. Fish with the initial average weight 0.2 g. They were fed for 12 weeks to nile tilapia fingerling stocked in 18 plastic tanks (200 liters) set up to recirculation system. Results indicated that final weight, weight gain, ADG, FCR and FE were the best in treatment 1(control) significant different (p<0.05) with other treatment, whereas the best growth of supplement coconut and A. mangium meal group was gained in 10/10% coconut and A. mangium meal in diet. Keywords: Coconut (by-product), Acacia mangium, Growth, Carcass Quality, Nile tilapia (Oreochromis niloticus) Source : https://ag2.kku.ac.th/kaj/PDF.cfm?filename=P100%20Fis30.pdf&id=3143&keeptrack=1
Effect of using soybean meal hydrolysate with pineapple juice in diet on growth performance, stress tolerance and disease resistance
Effect of using soybean meal hydrolysate with pineapple juice in diet on growth performance, stress tolerance and disease resistance Songsub Arungamol, Narawut Rapankum and Nopparat Patchanee ABSTRACT: Effect of using soybean hydrolysate through pineapple juice to replace fish meal in Nile tilapia on Growth performance stress tolerance and disease resistance. Soybean meal was digested with pineapple juice at 1:2 for 90 minutes and replaced with fish meal in diet formula. The experiment was assigned into 4 groups in each randomly by mixing soybean hydrolysate in diet at the rank of 0%, 25%, 50% and 75% which contained 31% protein and average energy level 284 kcal/100g. Tilapia with an average initial weight was 0.33 grams cultured for 45 days. The end of feeding experimental diet, fish were tested for tolerance to certain stress conditions by soaking 500 ppm formalin for 2 hours, 1.5 ppm of ammonia dissolved in water and the resistance to bacteria A. hydrophila. The results showed that fish fed with soybean meal digested with pineapple juice instead of fish meal at rate 0, 25 and 50% the effective growth were not different (P>0.05). In some stress tolerance tests by testing with formalin and ammonia indicated that accumulated mortality rate of experimental group using soybean hydrolysate in fish meal diet formula at the rate of 0 and 25% was lower than the fish meal replacement group at the rate 50 and 75% were significant (P0.05). It can be concluded that soybean hydrolysate can be digested with pineapple juice would be highly at 25% without affecting growth rate, stress tolerance and disease resistance. Keywords: Soybean meal hydrolysate, Nile tilapia, Stress tolerance test, Challenge Test Source : https://ag2.kku.ac.th/kaj/PDF.cfm?filename=P98%20Fis28.pdf&id=3141&keeptrack=1
Species diversity of parasitic fauna in John’s snapperLutjanus johnii and Russell’s snapper Lutjanus russellii
Species diversity of parasitic fauna in John’s snapperLutjanus johnii and Russell’s snapper Lutjanus russellii Duenchai Charoenruangsakul, Krittiya Chiangkul and Watchariya Purivirojkul ABSTRACT: Species diversity of parasitic fauna in Lutjanusjohnii and Lutjanusrussellii from the lower Gulf of Thailand were studies from October 2015 to July 2016. Euryhaliotrema spp. were dominant species, E. chrysotaeniaeand E. spirotubiforum found in both Lutjanus spp. while E.johni, E.tenuiaccessorium, E. longibaculoides, E. lisaeand Euryhaliotremasp.1 found only in L. johnii. Moreover, Caligid copepod and Gnathia (Planiza stage) were found from gill filament of both fish.Hatschekia sp. and Lernanthropus sp. found only in L. johnii and Brachiellalutianifound only in L. russellii. Ascaridoid nematode found in intestine of both Lutjanus spp. while Unidentifidetrematode found only in L. johnii.Philometra sp. was found in ovary of L. johnii. The finding of these six species of monogenes were new records of Thailand. Keywords: parasite, Lutjanus johnii, Lutjanus russellii Source : https://ag2.kku.ac.th/kaj/PDF.cfm?filename=O029%20Fis42.pdf&id=2638&keeptrack=6
In vitro digestibility of corn cob with crude enzyme extract from gastrointestinal tract of Nile tilapia (Oreochromis niloticus) and cellulase crude extract from Trichoderma viride
In vitro digestibility of corn cob with crude enzyme extract from gastrointestinal tract of Nile tilapia (Oreochromis niloticus) and cellulase crude extract from Trichoderma viride Rungkan Klahan, Montri Punyatong and Khanchai Danmek ABSTRACT: The present study was investigated the optimal time and apparent digestibility coefficient of enzyme from Nile tilapia gastrointestinal tract and cellulase crude extract from Trichoderma viride for corncob digestion. The crude extract from 15 g Nile tilapia and cellulase from Trichoderma virdie were took to digest corn cob at 0, 60, 120, 180, 240, 300 and360 min.The results showed that the optimal time of crude extract from Nile tilapia digested corn cob that detected by the glucose content, percentage of dry matter, protein fiber and fat were 300,5, 360, 120 and 180 min, respectively.Moreover, the optimal time of cellulase from Trichoderma viride for corn cob digestion which detected by the percentage of dry matter and glucose content were 240 and 360 min, respectively. This study indicated that the optimal time for corn cob digestion of crude extract from Nile tilapia and cellulase from Trichoderma viride were 360 min. In addition, corn cob can be used as feedstuff for Nile tilapia diet. Keywords: Nile tilapia, Trichoderma viride, corn cob, digestibility, in vitro Source : https://ag2.kku.ac.th/kaj/PDF.cfm?filename=P044%20Fis02.pdf&id=2318&keeptrack=2