Summary of Unidade 9 - Controle da produção de rãs parte 2 de 3
Summary
The video discusses the control of Frog Production, focusing on feeding strategies, feed conversion rates, and mortality rates during different growth phases. Key scientific concepts and methodologies are presented regarding the management of feed and monitoring of frog growth.
Key Concepts and Methodologies:
- Feed Calculation:
- Importance of accurately calculating feed quantity based on average weight and biomass.
- Feed rates decrease as frog weight increases:
- Up to 10 grams: 12% of body weight daily.
- 10 to 20 grams: 11% of body weight daily.
- Above 150 grams: less than 5% of body weight daily.
- Daily Feed Supply Calculation:
- Calculate total feed needed based on the average weight of the frogs and the recommended feed rate.
- Example: For 1000 frogs averaging 12.2 grams, calculate daily feed as 11% of their total weight.
- Monitoring Feed Consumption:
- Keep track of total feed provided and adjust based on growth.
- Use a spreadsheet for logging daily feed amounts and consumption patterns.
- Feed Conversion Ratio (FCR):
- Defined as total feed consumed divided by biomass gained.
- Helps determine efficiency in converting feed into frog weight.
- Example: If 84 kg of feed produces 33.6 kg of frogs, the FCR is approximately 2.49 kg of feed per kg of frog produced.
- Mortality Rate:
- Mortality is expressed as a percentage of the initial population.
- Understanding expected mortality rates for different growth phases (e.g., initial phase has higher mortality due to adaptation).
- Example: If starting with 1000 frogs and ending with 900, the Mortality Rate is 10%.
- Survival Rate:
- Calculated as 100% minus the Mortality Rate.
- Example: A Mortality Rate of 30% results in a Survival Rate of 70%.
- Production and Productivity:
- Production refers to total biomass produced over a specific area and time.
- Productivity is calculated by dividing biomass gain by the area used.
- Example: If 45.84 kg of frogs are produced in a 10 square meter area, the production is 4.58 kg per square meter.
Researchers/Sources Featured:
- Lima (2012)
- Morais (Emater, Rio de Janeiro)
- Previous studies referenced from 2003 and other literature on frog feeding and growth management.
Notable Quotes
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Category
Science and Nature