Energy budget and aspects of energy metabolism in common carp, Cyprinus carpio

Aspects of the resting respiration rate, specific dynamic action (SDA) and components of the total energy budget of 55 - 80g common carp were studied in the laboratory. The resting respiratory rate was monitored in computer operated metabolic chambers under different photoperiods. Common carp showed a crepuscular respiratory rhythm with peaks at dawn and dusk during a 12L : 12D photoperiod, with a mean oxygen consumption of 152 mg/kg/h. When acclimated to longer or shorter photoperiods respiration was also cyclic but with a lower mean respiratory rate. In continuous light or darkness respiratory rhythm was suppressed with no significant peakings. In carp fed with three diets containing 20,35 and 50% protein at a ration level of 0.40 to 1.00% body weight per day, SDA coefficient varied from 8.99 to 15.94% and was dependent on dietary protein but not on ration levels. SDA magnitude and post-feeding peak oxygen consumption varied significantly with both dietary protein content and total daily ration level. SDA duration was only related to ration size. The pattern of food energy allocation between the major components of the energy budget varied with dietary protein content and ration levels. The energy lost as heat of metabolism was found to increase with dietary protein level and total ration. Energy lost as faeces 'F' varied from 19 - 24% of 'C' and did not appear to be related to either protein content or ration levels. Nitrogenous excretion increased with an increase of dietary protein but decreased with an increase of ration level in the diet. Regression equations were developed from the data to allow prediction of respiratory energy loss 'R', faecal energy loss 'F' and energy lost through excretion 'U' from the food ingested V. Complete energy budget models compiled from experiments conducted over a 17 days period and using different diets did not successfully predict the actual growth. The energy budget balance was between 66.04% and 81.96%. Observed growth was less than predicted growth in every trial and it is suggested that this difference might have been due to short-term cyclic growth regulation and other minor experimental features. The data presented form the basis for the first reported study of total energy budgets in Cyprinus carpio

Studies on the quality and safety aspect of some commercially important marine fishes of the Bay of Bengal along the Cox’s Bazar coast of Bangladesh

1754-1760Moisture, ash, crude protein and lipid content (%) of Stromateus cinerius was 77.91±1.32, 2.52±0.2, 14.24±1.07, and 2.82±0.16 respectively; Lates calcarifer was 77.99±0.17, 3.63±0.16, 16.79±0.45 and 1.55±0.13 respectively; Trichiurus haumela was 75.22±0.51, 2.76±0.23, 15.19±0.64 and 4.25±0.07 respectively; Harpodon nehereus was 86.39±0.75, 0.75±0.38, 10.11±1.2 and 2.29±0.45 respectively and Hilsa ilisha was 68.05±1.85, 3.19±0.09 and 16.59±0.07 respectively. TVB-N content (mg/100g) of Stromateus cinerius, Lates calcarifer, Trichiurus haumela, Harpodon nehereus, and Hilsa ilisha was 24.58±0.6, 20.63±0.31, 24.68±0.1, 25.53±0.21 and 23.39±0.3 respectively. TMA-N content (mg/100g) of Stromateus cinerius, Lates calcarifer, Trichiurus haumela, Harpodon nehereus, and Hilsa ilisha was determined as 2.116±0.0, 2.11±0.0, 2.62±0.52, 2.7±0.54 and 2.06±0.0 respectively. In case of heavy metal the Cd and Cu concentration of all fishes was within the Maximum Allowable Limit i.e 0.05 ppm Cr and >2 ppm Pb except Stromateus cinerius in which Cr was nil and Pb was 1.62 ppm

Abstracts of National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020

This book presents the abstracts of the papers presented to the Online National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020 (RDMPMC-2020) held on 26th and 27th August 2020 organized by the Department of Metallurgical and Materials Science in Association with the Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, India. Conference Title: National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020Conference Acronym: RDMPMC-2020Conference Date: 26–27 August 2020Conference Location: Online (Virtual Mode)Conference Organizer: Department of Metallurgical and Materials Engineering, National Institute of Technology JamshedpurCo-organizer: Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, IndiaConference Sponsor: TEQIP-