A Full Lifecycle Bioenergetic Model for Bluefin Tuna

• DOI: 10.1371/journal.pone.0021903
• Publication Date: 2011-07-11T20:58:44Z
• Authors: Marko Jusup; Tin Klanjscek; Hiroyuki Matsuda; S. A. L. M. Kooijman
• Keywords: Spawn (biology); Bioenergetics; Thunnus; Fish physiology

We formulated a full lifecycle bioenergetic model for bluefin tuna relying on the principles of Dynamic Energy Budget theory. Traditional models in fish research deduce energy input and utilization from observed growth reproduction. In contrast, our predicts reproduction food availability temperature environment. calibrated to emulate physiological characteristics Pacific (Thunnus orientalis, hereafter PBT), species which has received considerable scientific attention due its high economic value. Computer simulations suggest that (i) main cause different rates between cultivated wild PBT is difference average body approximately 6.5°C, (ii) well-fed individual can spawn an number 9 batches per spawning season, (iii) abundance experienced by rather constant sufficiently provide yearly reproductive cycle, (iv) reserve exceptionally small, causing weight-length relationship be practically indistinguishable suggesting these are poorly equipped deal with starvation, (v) accelerated rate larvae connected morphological changes prior metamorphosis, while (vi) deceleration early juvenile stage related efficiency internal heat production. Based results, we discuss ecological traits PBT, including reasons Feed Conversion Ratio recorded aquaculture.