David, Neetha Susan (2003) Production functions in mariculture. Masters thesis, Central Institute of Fisheries Education.
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Abstract
Production function in aquaculture has received very little attention. An attempt has been made to evaluate the production function of mariculture systems. Production functions are generally based on growth and mortality. Numerous mathematical functions have been used to describe the age-weight relationship in cattle and poultry: however, little work has been done in modeling growth of organisms in aquaculture. The functions evaluated were Gompertz, Logistic, von Bertalanffy, Richards, modified Janoschek and polynomial growth equations. The Gauss-Newton and Quasi-Newton method of the nonlinear regression procedure of SYSTAT was used to estimate parameters of each function for individual weight-age curves. The growth models were used for the derivation of production functions along with no assumption on mortality and different assumptions of mortality like linear and exponential model. In the case of grey mullet Mugil cephalus logistic growth model gave the best fit while that for molluscs Crassostrea madrasensis and Pema v i^ is Gompertz growth curve was the best. The production function was estimated for the oyster data. It was found that the linear and exponential assumptions in mortality along with the Gompertz growth curve gave better results.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Production functions; Mariculture |
| Subjects: | Dissertations Aquaculture > Mariculture |
| Divisions: | CMFRI-Kochi > Mariculture Division Subject Area > CMFRI > CMFRI-Kochi > Mariculture Division CMFRI-Kochi > Mariculture Division Subject Area > CMFRI-Kochi > Mariculture Division |
| Depositing User: | Users 17220 not found. |
| Date Deposited: | 17 Sep 2016 04:45 |
| Last Modified: | 06 Oct 2016 10:40 |
| URI: | http://eprints.cmfri.org.in/id/eprint/11097 |
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