Maraena whitefish (Coregonus maraena) larvae reveal enhanced growth during first feeding with live Artemia nauplii (original) (raw)
Related papers
Aquaculture International, 2004
The use of dried Artemia biomass meal as an exclusive feed for postlarval white shrimp (Litopenaeus vannamei) was compared with four commercial feeds and three crustacean meals in a series of trials. Postlarvae (PL1-PL6) were stocked at a density of 1.5-2.5/litres in 16 tanks (100 litres volume) and fed, ad libidum, five times a day, over 23-29 days. Feeding postlarval shrimp with dried Artemia biomass resulted in a significantly larger size than feeding with three of the commercial feeds, and the crustacean meals. There was no significant size difference observed in animals fed with Artemia biomass and the commercial 'Golden Pearls' feed for postlarvae, however the coefficient of variation among the size of the 'Golden Pearls' fed animals was significantly higher. The weight increase of animals fed with Artemia biomass was higher than in animals fed with all the tested feeds. The survival rate was not significantly different in animals fed with Artemia flakes from 'Salt Creek', 'Bio-Marine', 'Golden Pearls' and Artemia biomass, however the survival rate was significantly larger in animals fed with Artemia biomass than in animals fed with the crustacean meals and 'Artemac.' Results suggest that dried Artemia biomass is a well-suited feed for postlarval L. vannamei.
Survival and Growth Rate of Clarias gariepinus Larvae Fed with Artemia salina and Inert Diet
2017
The growth and survival of Clarias gariepinus larvae (0.42mg) fed Artemia salina (D1), inert diet (egg white + fish meal) (D2) and a combination of both diets (D3) was investigated for 42 days. Each diet was feed to 80 post yolk-sac fry, in triplicate plastic tanks holding 40L of water. The specific growth rate, survival, percentage weight gain, mean weight gain and performance index were investigated. The percentage weight gain and specific growth rate were not significantly different (P>0.05) for the various diets, while the final mean weight, survival and performance index of the larvae fed D1, D2 and D3 were significantly different (P<0.05) from each other.The highest specific growth rate (14.86 g/day), final weight (4.39g) and survival (60.42%) were recorded in fish fed D3 while the least growth was recorded in fish fed D2 with specific growth rate of 11.88g/day, final weight of 0.993g and survival of 30.42%. The result indicated that there was an increase in body weight ...
Survival and Growth of Crangon nigricauda Larvae (Decapoda, Caridea) Raised on Experimental Diets
Journal of the World Aquaculture Society, 1987
Newly hatched Crangon zoeae from different maternal shrimp were raised separately using an Imhoff cone larval-rearing system. Experimental diets were Chuetoceros gracile, live Artemin nauplii, lyophilized Arremia nauplii particles, calcium alginate microencapsulated (CAM) Arremia nauplii, lyophilized Daphnia magna and CAM Daphnia magna. A dependable "atomizer" design for lab oratory preparation of CAM diets was developed. Initially, survival rates of zoeae fed either Chuetoceros or live Arremia nauplii were evaluated in order to establish a suitable control diet for subsequent growth experiments, and the interbrood and intrabrood components of zoed survival variation were analyzed. Crangon zoeae ate every type of food offered to them, but only Chueroceros-fed zoeae survived to metamorphosis. Zoeal survival rates were extremely variable. Interbrood variation was greater than intrabrood variation, but the difference was not statistically significant. Zoeae from smaller maternal shrimp were generally more active and had greater survival rates than zoeae from larger, presumably older and senescent shrimp. Zoeae that were fed Chuetoceros supplemented with CAM Arremia nauplii had significantly greater (P < 0.001) growth rates than siblings fed only Chuetoceros. Suspension feeding on Chuefoceros was probably more efficient than raptorial feeding on Artemia nauplii, resulting in greater survival rates. Supplementing a successful microalgal diet with CAM Artemia nauplii allowed greater use of zoeal feeding mechanisms, added an animal nutrient source to the diet, and affected growth rates by increasing the molt increment and decreasing the intermolt period.
Aquaculture, 1989
The survival and growth of Penaeus semisulcatus postlarvae fed Artemia nauplii or rotifers, Brachionus plicatilis, were studied in a small-scale bioassay system. Shrimp larvae at the nauplius 6 substage were cultured in 1-l cones at a density of 100/l, with daily medium exchange. In the first set of experiments shrimp from the zoea 2 (22) versus zoea 3 (23) substages were fed rotifers at increasing densities. Dry weight of postlarvae fed 20 or 30 rotifers per ml was higher than that of larvae fed 10 or 40 rotifers per ml (P < 0.05). No differences were found when postlarvae were fed from the 22 versus the 23 substage. In the second series of experiments Artemia were given at increasing densities to shrimp from the Z2,23, or mysis 1 (Ml) substages. Dry weight increased as prey concentration rose to 9 per ml and decreased when feeding was postponed to 23 or Ml (PcO.05). The third experiment compared regimes in which larvae were fed Artemia or rotifers alone, or rotifers from 22 followed by Artemia from 23, Ml or M2. Postponing or eliminating Artemia addition resulted in decreased postlarval dry weight (PcO.05). High survival can be achieved with rotifers, but energy intake is apparently reduced as dry weight is lower. Thus Artemia nauplii alone may be a superior food for mass culture of penaeid larvae.
Aquaculture Nutrition, 2010
Problems of limited number of dry feeds as supplement or replacement of live feeds have led to poor larval nutrition in many species of fish. Therefore, the suitability of co-feeding 8-day-old African catfish (Clarias gariepinus) posthatch larvae using live feed (Artemia salina) and formulated dry diet containing freshwater atyid shrimp (Caridina nilotica) during weaning was investigated. The experiment ended after 21 days of culture and respective groups compared on the basis of growth performance, survival, feed utilization and nutrient utilization. Larvae co-fed using 50%Artemia and 50% formulated dry diet resulted in significantly (P < 0.05) better growth performance, food gain ratio (FGR), protein efficiency ratio (PER) and productive protein values (PPV) than other treatments. The lowest growth performance occurred in larvae weaned using 100% formulated and commercial dry diets. Better survival of over 90% was obtained in larvae weaned using 50%Artemia and 50% dry diet, while abrupt weaning using 100% dry diets resulted in lower survival (<75%). These results support a recommendation of co-feeding C. gariepinus larvae using a formulated dry diet containing C. nilotica and 50% live feed when weaning is performed after 8 days posthatching period.
Aquaculture …, 2011
Problems of limited number of dry feeds as supplement or replacement of live feeds have led to poor larval nutrition in many species of fish. Therefore, the suitability of co-feeding 8-day-old African catfish (Clarias gariepinus) posthatch larvae using live feed (Artemia salina) and formulated dry diet containing freshwater atyid shrimp (Caridina nilotica) during weaning was investigated. The experiment ended after 21 days of culture and respective groups compared on the basis of growth performance, survival, feed utilization and nutrient utilization. Larvae co-fed using 50% Artemia and 50% formulated dry diet resulted in significantly (P < 0.05) better growth performance, food gain ratio (FGR), protein efficiency ratio (PER) and productive protein values (PPV) than other treatments. The lowest growth performance occurred in larvae weaned using 100% formulated and commercial dry diets. Better survival of over 90% was obtained in larvae weaned using 50% Artemia and 50% dry diet, while abrupt weaning using 100% dry diets resulted in lower survival (<75%). These results support a recommendation of co-feeding C. gariepinus larvae using a formulated dry diet containing C. nilotica and 50% live feed when weaning is performed after 8 days posthatching period.
Aquaculture Nutrition, 2013
Live food supply is a key factor contributing to the success of larval fish rearing. However, live food densities vary greatly between fish species and management protocols across fish hatcheries. The growth, survival, food selection and consumption of yellowtail kingfish larvae were examined at different regimes of live food supply in an attempt to identify a suitable live food feeding protocol for larval rearing in marine fish. This study was divided into two feeding phases: rotifer phase from 3 to 14 DPH (phase I) and Artemia nauplii phase from 15 to 22 DPH (phase II). In phase I, four rotifer densities (1, 10, 20 and 40 mL À1 ) were used. In phase II, Artemia started at 0.8 nauplii mL À1 on 15 DPH, and then the density of Artemia was daily incremented by 50%, 70%, 90% and 110%, respectively, in four treatments from 15 to 22 DPH. In phase I, rotifer density significantly affected larval growth, but not survival. By 7 DPH, the number of rotifers consumed by fish larvae reached 170-260 individuals, but did not significantly differ between rotifer densities. During cofeeding, fish larvae selected against Artemia nauplii by 10 DPH, but by 14 DPH Artemia nauplii became the preferred prey item by fish larvae exposed to the 10, 20 and 40 rotifers mL À1 . In phase II, both fish growth and survival were affected by Artemia densities. Fish daily consumption on Artemia by 20 DPH reached 500-600 individuals but did not significantly differ between prey densities. The result suggests that rotifer densities be offered at 20-40 mL À1 before 6 DPH and 10-20 mL À1 afterwards to support larval fish growth and survival. Likewise, Artemia is recommended at a daily increment of 90-110% of 0.8 mL À1 from 15 to 22 DPH. This study proposes a management protocol to use appropriate type and quantity of live food to feed yellow-tail kingfish larvae, which could be applicable to larval culture of other similar marine fish species.
The present study was conducted on Macrobrachium rosenbergii (de Man) larvae to estimate the effectiveness of different diets to replace Artemia nauplii in the feeding system. The study included two experiments performed at pilot scale in 12–l tanks using a recirculating system. Larval stocking density was 100 l–1. After 10 days of feeding by Artemia nauplii, different diets included wet and dry diets (Egg custard, Artemia flakes and Higashi Maru No-3 feed) and de-capsulated Artemia cysts, were tested to replace Artemia nauplii. In a control treatment using only de-capsulated Artemia cysts throughout the complete larval rearing was also included. The results showed that feeding larvae exclusively de-capsulated cysts for the complete rearing cycle was not suitable. When gradually replacing up to 50% of the Artemia nauplii ratio with wet or dry diets, good results in terms of growth, survival and quality of the larvae were obtained, similar to the control treatment receiving only Artemia nauplii. However, immediately replacing 50% of the Artemia nauplii ratio with artificial diets negatively affected larval development. Addition of artificial feed could start from larval stage VI, with about 25% of the Artemia nauplii replaced with artificial diet. Subsequently, the addition ratio could be increased up to 50% from stage VIII to postlarvae stage. Artificial diets should be provided in different particle size ranges based on the acceptance of larvae, larval stage, gradually increasing from 250 to 1000 μm from stage VI to postlarvae stage. The results obtained in the present work may also helpful for the replacement for different diets for economical aspects of the hatchery operations.
SpringerPlus, 2013
This study investigated the effects of sudden weaning of angel fish larvae (Pteraphylum scalari) from Artemia nauplii to commercial larval feed. Four days post hatch (DPH) larvae were reared in four different weaning protocols (TR1-TR4) with triplicates in a complete randomize design. Larvae in TR1 and TR4 were exclusively fed Artemia nauplii and dry feed respectively. In TR2 and TR3, larvae were initially fed Artemia nauplii and suddenly wean to formulated feed on 14 DPH and 7 DPH respectively. The experiment was lasted for 28 days. At the end of the experiment, final mean weight (FW), total length (FL), height (FH), Daily Weight Gain (DWG), Specific Growth Rate (SGR), survival and stress index were compared. Significantly highest (P < 0.05) FW, DWG and SGR were observed in TR1 and TR2 while former values of TR3 were not significantly different from TR1. Highest FL observed in TR1 and TR2 while FL of TR2 was statistically similar to that of TR3. The poorest growth was observed in larvae solely fed formulated feed. Survival and the stress index were independent from weaning methods. Although sudden weaning is possible on 7 DPH, larvae showed comparatively higher growth when switch off to formulate feed on 14 DPH.
IRJET-Survival and Growth Rate of Clarias gariepinus Larvae Fed with Artemia salina and Inert Diet
The growth and survival of Clarias gariepinus larvae (0.42mg) fed Artemia salina (D1), inert diet (egg white + fish meal) (D2) and a combination of both diets (D3) was investigated for 42 days. Each diet was feed to 80 post yolk-sac fry, in triplicate plastic tanks holding 40L of water. The specific growth rate, survival, percentage weight gain, mean weight gain and performance index were investigated. The percentage weight gain and specific growth rate were not significantly different (P>0.05) for the various diets, while the final mean weight, survival and performance index of the larvae fed D1, D2 and D3 were significantly different (P<0.05) from each other.The highest specific growth rate (14.86 g/day), final weight (4.39g) and survival (60.42%) were recorded in fish fed D3 while the least growth was recorded in fish fed D2 with specific growth rate of 11.88g/day, final weight of 0.993g and survival of 30.42%. The result indicated that there was an increase in body weight among diets types; the mean was 0.731g for larvae fed D3, 0.421g for larvae fed D1 and 0.165g for larvae fed D2. The performance index for Clarias gariepinus larvae fed D3 was the highest (6.3) followed by D1 (2.51) and then D2 (0.714). It was therefore recommended that Clarias gariepinus larvae be fed with a combination of the inert diet and Artemia salina to achieve better growth performance and higher survival rate.