Simple measurements reveal the feeding history, the onset of reproduction, and energy conversion efficiencies in captive bluefin tuna
Simple measurements reveal the feeding history, the onset of reproduction, and energy conversion efficiencies in captive bluefin tuna
复制标题
DOI：
10.1016/j.seares.2014.09.002
复制
发表时间：
2014-11-01
影响因子：
2
通讯作者：
Matsuda, Hiroyuki
中科院分区：
文献类型：
--
作者：
Jusup, Marko;Klanjscek, Tin;Matsuda, Hiroyuki
我们提出了一种与完全建立的动态能量收支(DEB)模型相结合的数值方法，旨在根据通常测量的水产养殖数据(体长、体质量或条件因子)一致地逼近养殖鱼类的摄食历史。我们通过在一个独立的数据集上对基于DEB的太平洋蓝鳍金枪鱼模型进行验证，并探索圈养这种物种所隐含的生物能量学，证明了该方法的有效性。在验证的情况下，结果表明，该模型成功地解释了实际鱼料偏差的75%以上。在5%的显著水平上，预测既不低估也不高估观察值，也不存在偏差。总体模型准确率为87.6%，令人满意。在金枪鱼生物能量学的背景下，我们解释了为什么在被检查的情况下，第一次繁殖只发生在鱼达到七岁之后，而在野外需要五年，有时圈养需要短短三年。最后，我们计算了蓝鳍金枪鱼整个生命周期的能量转换效率和供应压力，从理论上支持了在蓝鳍金枪鱼养殖中观察到的呼吸测量对有氧代谢的相对较低的贡献和较高的饲料转化率。(C)2014爱思唯尔B.V.保留所有权利。
We present a numerical approach that, in conjunction with a fully set up Dynamic Energy Budget (DEB) model, aims at consistently approximating the feeding history of cultivated fish from the commonly measured aquaculture data (body length, body mass, or the condition factor). We demonstrate the usefulness of the approach by performing validation of a DEB-based model for Pacific bluefin tuna (Thunnus orientalis) on an independent dataset and exploring the implied bioenergetics of this species in captivity. In the context of validation, the results indicate that the model successfully accounts for more than 75% of the variance in actual fish feed. At the 5% significance level, predictions do not underestimate nor overestimate observations and there is no bias. The overall model accuracy of 87.6% is satisfactory. In the context of tuna bioenergetics, we offer an explanation as to why the first reproduction in the examined case occurred only after the fish reached seven years of age, whereas it takes five years in the wild and sometimes as little as three years in captivity. Finally, we calculate energy conversion efficiencies and the supply stress throughout the entire lifetime to theoretically underpin the relatively low contribution of growth to aerobic metabolism implied by respirometry and high feed conversion ratio observed in bluefin tuna aquaculture. (C) 2014 Elsevier B.V. All rights reserved.