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Full-Text Articles in Animal Sciences
Optimal Feeding Time And Duration Of Hybrid Crappie Kept Indoors, Wiles N. Brandon, Gregory A. Dudenhoeffer, Thomas R. Omara-Alwala
Optimal Feeding Time And Duration Of Hybrid Crappie Kept Indoors, Wiles N. Brandon, Gregory A. Dudenhoeffer, Thomas R. Omara-Alwala
Cooperative Extension Research Publications
Crappie (Pomoxis spp.) is a popular sport fish with food fish potential. Feeding behavioral patterns should be considered prior to nutrtitional studies. The objective of this study was to determine the best feeding time and duration for hybrid crappie raised in indoor recirculating aquaculture systems. Three feeding treatments with three replciates consisted of two 12 hour feeding periods initiated at 0800 (12h-amLD) and 1700 (12h-pmLD) and a 24 feeding period started at 0800 (24h-amLD). Treatments in experimental tanks were arranged in a random block design and stocked with 14 hybrid fingerlings fed for 12 weeks. Fingerling fish were spwaned in …
The Size Relationship Of 12 Days Post-Exodus Larvae With 56 Day Post-Exodus Fingerlings Regarding Growth And Survival In Bluegill (Lempomis Macrochirus), J.L. Schulte, James E. Wetzel
The Size Relationship Of 12 Days Post-Exodus Larvae With 56 Day Post-Exodus Fingerlings Regarding Growth And Survival In Bluegill (Lempomis Macrochirus), J.L. Schulte, James E. Wetzel
Cooperative Extension Research Publications
Low survival and quality of early life-stage bluegill is an obstacle to viable production where size may influence weaning efficiency. Herein, we investigate through two trials the effects of fry size 12-d post-exodus on total length, weight, production and survival through 56-d post-exodus. Full sibling broods (trial 1=10, trial 2=6) were reared with feedings of brine shrimp Artemia sp. nauplii (BS) through 12-d post-exodus (PE). Broods of trial 1 were visual sorted 12 d PE into small and large size groups. Fry (n = 25) from each size group were sampled for measured total length (TL) and weight. Starting 14 …
Biweekly Growth Characteristics Of Juvenile Bluegill Fed Different Protein Diets, Wiles N. Brandon, Gregory A. Dudenhoeffer, Yongfang Zhang, Thomas R. Omara-Alwala
Biweekly Growth Characteristics Of Juvenile Bluegill Fed Different Protein Diets, Wiles N. Brandon, Gregory A. Dudenhoeffer, Yongfang Zhang, Thomas R. Omara-Alwala
Cooperative Extension Research Publications
This study evaluated growth rates of juvenile bluegill (Lepomis macrochius) fed different protein levels, raised indoors. Six experimental diets containing protein levels of 32, 35, 38, 41, 44, and 47% with 346 kcal/g energy were fed to four replicates of 12 fish with initial mean weight of 24.9±0.51g. Fish were fed by hand to satiation three times daily for 16 weeks. Percent weight gain, for fish fed 32, 35, 38, 41, 44, and 47% protein diets were 180.5±43.8, 203.6±32.33, 256.4±19.4, 235.8±20.63, 249.1±19.59, and 275.2±47.3, and specific growth rates 0.91±0.15, 0.98±0.10, 1.13±0.05, 1.08±0.05, 1.11±0.05, and 1.17±0.11, respectively for the study. Biweekly …
The Effects Of Dietary Protein-To-Energy Ratio On Juvenile Bluegill (Lepomis Macrochirus) Growth With Observations Of Sexual Dimorphism, K. Vandeloecht, Gregory A. Dudenhoeffer, Yongfang Zhang, T.R. Omara-Alwala
The Effects Of Dietary Protein-To-Energy Ratio On Juvenile Bluegill (Lepomis Macrochirus) Growth With Observations Of Sexual Dimorphism, K. Vandeloecht, Gregory A. Dudenhoeffer, Yongfang Zhang, T.R. Omara-Alwala
Cooperative Extension Research Publications
Bluegill is a promising aquaculture species in the Midwest. males are typically larger than females. However, there is little or no information on nutritional differences between sexes and protein-to-energy ratio. The objective of this study was to characterize the protein-to-energy ratio in juvenile bluegill with observations on gender differences. Bluegill (20-30g) were fed diets consisting of 35% protein with 14, 16, and 18% lipids and 38% protein with 12, 14, and 16% lipids. Four replicates of 12 fish each were fed the diets for 16 weeks. Terminal mean body weights, lengths, liver wights, visceral weights, hepatic somatics indices (HSI), and …
The Distribution Of Α-Amylase Activity Along The Digestive Tract Of Juvenile Bluegill (Lepomis Macrochirus) And Its Comparison With Selected Fish Species, Namrata Giri, Yongfang Zhang, Gregory A. Dudenhoeffer, Thomas R. Omara-Alwala
The Distribution Of Α-Amylase Activity Along The Digestive Tract Of Juvenile Bluegill (Lepomis Macrochirus) And Its Comparison With Selected Fish Species, Namrata Giri, Yongfang Zhang, Gregory A. Dudenhoeffer, Thomas R. Omara-Alwala
Cooperative Extension Research Publications
Carbohydrates are the least expensive form of dietary energy for animals. Although fish don't have specific requirements for dietary carbohydrates, they must be provided with the appropriate levels of carbohydrates in their diets. Moderate levels of carbohydrate could support fishs' better growth performance and may decrease the use of the more expensive protein and lipids in the diet. Different fish have different ability to utilize digestible carbohydrates, which may relate to the relative amount of amylase activity present in the digestive system of the various species. α-amylase is a key enzyme for carbohydrate digestion. Bluegill, an important forage and recreational …
Amino Acid Profiles In The Tissues Of Juvenile Bluegill (Lepomis Macrochirus) From The Wild And Commercially-Fed Fish, Yongfang Zhang, Gregory A. Dudenhoeffer, Namrata Giri, James E. Wetzel
Amino Acid Profiles In The Tissues Of Juvenile Bluegill (Lepomis Macrochirus) From The Wild And Commercially-Fed Fish, Yongfang Zhang, Gregory A. Dudenhoeffer, Namrata Giri, James E. Wetzel
Cooperative Extension Research Publications
Amino acid profiles of fish tissues and fish eggs have been extensively investigated in some fish species. Amino acid profiles are helpful in quantifying the indispensable amino acid requirements for these fish. Bluegill is a major forage fish for the largemouth bass (Micropterus samoides) and an important recreational fish throughout the US. The demand for bleugill as a food fish has increased recently. However, the information on the amino acid profiles of its eggs and tissues is lacking. The objectve of this study was to determine the amino acid profiles of the muscles and whole body of the 1-2 g …
Effects Of Soybean Meal Substitution For Fish Meal In Diets Of Juvenile Bluegill (Lepomis Macrochrius), K. Stuckenschneider, A. Allen, A. Weckenborg, Gregory A. Dudenhoeffer
Effects Of Soybean Meal Substitution For Fish Meal In Diets Of Juvenile Bluegill (Lepomis Macrochrius), K. Stuckenschneider, A. Allen, A. Weckenborg, Gregory A. Dudenhoeffer
Cooperative Extension Research Publications
Bluegill has potential for production as a food fish. Feed is 40-60% of total production costs. Few studies have been conducted on bluegill replacing fish meal with soybean meal, which is a less expensive plant protein source. The objective of this experiment was to determine the effect of 25, 50, 75% soybean meal substitution of fish meal protein in juvenile bluegill diets. Treatments consisted of a 38% crude protein control diet, and diets with 25, 50, and 75% of fish meal replaced with soybean meal (SB Sub). All diets were insonitrogenous and isocaloric. A completely randomized block design was used …
The Effect Of Dietary Protein Level On The Growth Performance And Digestive Protease Activity In Juvenile Bluegill (Lepomis Macrochrius), Yongfang Zhang, Gregory A. Dudenhoeffer, Thomas R. Omara-Alawla
The Effect Of Dietary Protein Level On The Growth Performance And Digestive Protease Activity In Juvenile Bluegill (Lepomis Macrochrius), Yongfang Zhang, Gregory A. Dudenhoeffer, Thomas R. Omara-Alawla
Cooperative Extension Research Publications
A 16-week feeding experiment was conducting in an indoor recirculating aquaculture system (RAS) to determine the effects of dietary protein level on the growth and digestive protease activity in juvenile bluegills. Six isocaloric experimental diets were forumalted with 32%, 35%, 38%, 41%, 44%, and 47% levels of protein. Menhdaen fish meal was use as the sole protein source. Juvenile bluegills of 24.91 ± 0.50 g initial weight were distributed into 24 151 L tanks with 12 fish each. Each diet had four replications. Fish were fed to satiation three times a day by hand. At the termination, there no mortalities …
Effects Of Chemical Preservatives On Weights And Lengths Of Bluegill Larvae, Scott M. Welch, Gregory A. Dudenhoeffer, Thomas R. Omara-Alawla
Effects Of Chemical Preservatives On Weights And Lengths Of Bluegill Larvae, Scott M. Welch, Gregory A. Dudenhoeffer, Thomas R. Omara-Alawla
Cooperative Extension Research Publications
Measuring the lenghts and weights of live fish larvae can be tedious and time-consuming. This constraint could be alleviated by preserving the fish larvae in appropriate chemicals for later measurements. There is little or no information on the effects of preservatives on Bluegill larvae. The objective of this study was to determine the effects of five different common preservatives on Bluegill larvae. Individual weights and lengths of fish were measured and then the larvae were preserved for 7 or 26 days. Preservatives were 5% formalin, 10% formalin, 30% ethanol at -19 *C, 70% ethanol, and 90% ethanol. Preliminary average weights …