Jauralde I, Velazco-Vargas J, Tomás-Vidal A, Jover Cerdá M, Martínez-Llorens S
Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology, Universitat Politècnica de València, Camino de Vera 14, 46071 València, Spain.
Faculty of Environmental Science, Pontifical University Catholic of Ecuador in Esmeraldas (PUCESE), C/Espejo y Santa Cruz S/N, Esmeraldas 080150, Ecuador.
Animals (Basel). 2021 Jan 4;11(1):77. doi: 10.3390/ani11010077.
The meagre is a carnivorous species and might be a suitable candidate species for the diversification of aquaculture in the Mediterranean region. This is based on its high growth and flesh quality. Nevertheless, there is little information available about its growth rates and nutrient requirements. The objective of this study was to determine the protein and energy requirements of juvenile meagre (). Two trials for different weights of 53 and 188 g were conducted with rations from starvation to apparent satiation with the scope of studying its nutritional needs. In the first trial, the initial mean body weight of the fish was 53 g, and they were fed at feeding rates, measured as a percentage of the body weight, of 0, 0.75, 1.5, 2.5, 3.5, and 4.5%, with two replicates per treatment. In a second trial, another group with approximately 188 g of initial body weight was fed at feeding rates of 0, 0.5, 1.5, and 2.5%, with two replicates per treatment. The optimum thermal growth coefficient was obtained with a feed intake of 2.2% day in trial A and 1.73% day in trial B. The digestible protein (DP) intake for maintenance was determined as 0.57 g kg day, the DP intake for maximum growth was 6.0 g kg day, and the point for maximum efficiency in protein retention was 1.8 g kg day. The requirement for digestible energy (DE) intake for maintenance was recorded at 25.4 kJ kg day, the DE intake to maximize growth was 365 kJ kg day, and the point for maximum efficiency in energy retention occurs with a digestible energy intake of 93 kJ kg day. The requirements and retention efficiency of protein and energy in tend to be within the range other fish species. The maintenance needs are in agreement with species with low voluntary activity and growth requirements in agreement with fast-growth species.
条纹鲈是一种肉食性物种，可能是地中海地区水产养殖多样化的合适候选物种。这是基于其高生长率和肉质。然而，关于其生长速度和营养需求的信息很少。本研究的目的是确定条纹鲈幼鱼的蛋白质和能量需求。针对53克和188克两种不同体重的条纹鲈进行了两项试验，投喂量从饥饿到明显饱足，以研究其营养需求。在第一项试验中，鱼的初始平均体重为53克，以体重百分比衡量的投喂率分别为0%、0.75%、1.5%、2.5%、3.5%和4.5%，每个处理重复两次。在第二项试验中，另一组初始体重约为188克的鱼，投喂率分别为0%、0.5%、1.5%和2.5%，每个处理重复两次。试验A中每日摄食量为2.2%时获得最佳热生长系数，试验B中为1.73%。维持所需的可消化蛋白质（DP）摄入量确定为0.57克/千克·天，最大生长所需的DP摄入量为6.0克/千克·天，蛋白质保留效率最高时的摄入量为1.8克/千克·天。维持所需的可消化能量（DE）摄入量记录为25.4千焦/千克·天，使生长最大化的DE摄入量为365千焦/千克·天，能量保留效率最高时的可消化能量摄入量为93千焦/千克·天。条纹鲈蛋白质和能量的需求及保留效率往往在其他鱼类物种的范围内。维持需求与自愿活动低的物种一致，生长需求与快速生长的物种一致。
