The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand
Figures 2-4 (p. 10), 2-5 (p. 15) & 2-6 (p. 21) were removed for copyright reasons. Aquaculture is a growing primary industry in New Zealand. Currently the industry is comprised of three main species: GreenshellTM mussels, Pacific oyster, and King Salmon. The introduction of a white fleshed fish...
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ftmasseyuniv:oai:mro.massey.ac.nz:10179/13143 2023-05-15T17:54:22+02:00 The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand Elvy, Jordan 2017 http://hdl.handle.net/10179/13143 en eng Massey University http://hdl.handle.net/10179/13143 Q112933676 The Author Silver trevally Pseudocaranx georgianus Feeding and feeds Fish culture Proteins in animal nutrition Research Subject Categories::FORESTRY AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Animal production::Aquaculture Thesis 2017 ftmasseyuniv 2022-08-09T17:15:03Z Figures 2-4 (p. 10), 2-5 (p. 15) & 2-6 (p. 21) were removed for copyright reasons. Aquaculture is a growing primary industry in New Zealand. Currently the industry is comprised of three main species: GreenshellTM mussels, Pacific oyster, and King Salmon. The introduction of a white fleshed fish presents obvious commercial opportunity and production gains for New Zealand aquaculture. Silver trevally provides this opportunity and has the potential to further develop the industry. When developing a new species for aquaculture an understanding of their nutritional requirements at the different life stages is required. This thesis investigates the protein requirement of juvenile silver trevally. Silver trevally (67.5±12.0g) were randomly assigned to 12 tanks, 15 fish per tank. Four isoenergetic diets ranging in crude protein (CP) content from 30 to 60% CP were fed, in triplicates, for 12 weeks. Growth, including specific growth rate (SGR), did not significantly differ between diets. Feed efficiency was lowest in fish fed the 40% CP diet compared with the other three diets. Protein retention was highest in fish fed the lowest protein diet. Condition indices in silver trevally were unaffected by the protein content of the diet. Overall, this experiment was inconclusive on the ideal protein level in the diet. A palatability trial was carried out to determine if feed intake varied among diets. For comparison a commercial pellet from Ridley’s (50% CP) and a gel diet (20.4% CP) used by Plant & Food Research was also included in this trial. Twenty-four fish from the growth trial were allocated to two tanks for the palatability trial. Four behavioural responses were observed: the food item was ignored; fish approached the food but did not ingest; the fish took the food into their mouths before spitting it out; and the food was ingested. The 60% CP experimental diet, a commercial pellet, and a gel diet had significantly higher rates of intake than the other diets, with the 30% CP diet having the lowest rate of ... Thesis Pacific oyster Massey University: Massey Research Online Pacific New Zealand |
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Massey University: Massey Research Online |
op_collection_id |
ftmasseyuniv |
language |
English |
topic |
Silver trevally Pseudocaranx georgianus Feeding and feeds Fish culture Proteins in animal nutrition Research Subject Categories::FORESTRY AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Animal production::Aquaculture |
spellingShingle |
Silver trevally Pseudocaranx georgianus Feeding and feeds Fish culture Proteins in animal nutrition Research Subject Categories::FORESTRY AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Animal production::Aquaculture Elvy, Jordan The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand |
topic_facet |
Silver trevally Pseudocaranx georgianus Feeding and feeds Fish culture Proteins in animal nutrition Research Subject Categories::FORESTRY AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Animal production::Aquaculture |
description |
Figures 2-4 (p. 10), 2-5 (p. 15) & 2-6 (p. 21) were removed for copyright reasons. Aquaculture is a growing primary industry in New Zealand. Currently the industry is comprised of three main species: GreenshellTM mussels, Pacific oyster, and King Salmon. The introduction of a white fleshed fish presents obvious commercial opportunity and production gains for New Zealand aquaculture. Silver trevally provides this opportunity and has the potential to further develop the industry. When developing a new species for aquaculture an understanding of their nutritional requirements at the different life stages is required. This thesis investigates the protein requirement of juvenile silver trevally. Silver trevally (67.5±12.0g) were randomly assigned to 12 tanks, 15 fish per tank. Four isoenergetic diets ranging in crude protein (CP) content from 30 to 60% CP were fed, in triplicates, for 12 weeks. Growth, including specific growth rate (SGR), did not significantly differ between diets. Feed efficiency was lowest in fish fed the 40% CP diet compared with the other three diets. Protein retention was highest in fish fed the lowest protein diet. Condition indices in silver trevally were unaffected by the protein content of the diet. Overall, this experiment was inconclusive on the ideal protein level in the diet. A palatability trial was carried out to determine if feed intake varied among diets. For comparison a commercial pellet from Ridley’s (50% CP) and a gel diet (20.4% CP) used by Plant & Food Research was also included in this trial. Twenty-four fish from the growth trial were allocated to two tanks for the palatability trial. Four behavioural responses were observed: the food item was ignored; fish approached the food but did not ingest; the fish took the food into their mouths before spitting it out; and the food was ingested. The 60% CP experimental diet, a commercial pellet, and a gel diet had significantly higher rates of intake than the other diets, with the 30% CP diet having the lowest rate of ... |
format |
Thesis |
author |
Elvy, Jordan |
author_facet |
Elvy, Jordan |
author_sort |
Elvy, Jordan |
title |
The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand |
title_short |
The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand |
title_full |
The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand |
title_fullStr |
The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand |
title_full_unstemmed |
The protein requirement of juvenile silver trevally (Pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Animal Science at Massey University, Manawatu, New Zealand |
title_sort |
protein requirement of juvenile silver trevally (pseudocaranx georgianus) to optimise growth in hatchery environments : a thesis presented in partial fulfilment of the requirements for the degree of master of science in animal science at massey university, manawatu, new zealand |
publisher |
Massey University |
publishDate |
2017 |
url |
http://hdl.handle.net/10179/13143 |
geographic |
Pacific New Zealand |
geographic_facet |
Pacific New Zealand |
genre |
Pacific oyster |
genre_facet |
Pacific oyster |
op_relation |
http://hdl.handle.net/10179/13143 Q112933676 |
op_rights |
The Author |
_version_ |
1766162122270572544 |