Džoić Tomislav, Beg Paklar Gordana, Grbec Branka, Ivatek-Šahdan Stjepan, Zorica Barbara, Šegvić-Bubić Tanja, Čikeš Keč Vanja, Lepen Pleić Ivana, Mladineo Ivona, Grubišić Leon, Verley Philippe
Physical Oceanography Laboratory, Institute of Oceanography and Fisheries, Split, Croatia.
Research and Development Division, Meteorological and Hydrological Service, Zagreb, Croatia.
PLoS One. 2017 Nov 30;12(11):e0188956. doi: 10.1371/journal.pone.0188956. eCollection 2017.
During routine monitoring of commercial purse seine catches in 2011, 87 fingerling specimens of scombrids were collected in the southern Adriatic Sea. Sequencing of the mitochondrial DNA control region locus inferred that specimens belonged to the Atlantic bluefin tuna, Thunnus thynnus (Linnaeus, 1758) (N = 29), bullet tuna, Auxis rochei (Risso, 1810) (N = 30) and little tunny, Euthynnus alletteratus, Rafinesque, 1810 (N = 28). According to previously published growth parameters, the age of the collected specimens was estimated at approximately 30-40 days, suggesting they might have been spawned in the Adriatic Sea, contrary to the current knowledge. A coupled modelling system with hydrodynamic (ROMS) and individual based model (IBM-Ichthyop) was set up to determine the location of the spawning event. Numerical simulations with the IBM model, both backward and forward in time, indicate commercial tuna cages in the middle Adriatic coastal area as possible spawning location. The two other non-commercial species likely opportunistically use the positive environmental (abiotic and biotic) conditions to spawn in the same area.
2011年在对商业围网捕捞进行常规监测期间,在亚得里亚海南部采集了87尾鲭科幼鱼标本。线粒体DNA控制区基因座测序推断,这些标本分别属于大西洋蓝鳍金枪鱼(Thunnus thynnus,林奈,1758年)(N = 29)、巴鲣(Auxis rochei,里索,1810年)(N = 30)和长鳍金枪鱼(Euthynnus alletteratus,拉菲内克,1810年)(N = 28)。根据先前公布的生长参数,估计所采集标本的年龄约为30 - 40天,这表明它们可能是在亚得里亚海产卵的,这与目前的认知相反。建立了一个包含水动力模型(ROMS)和个体基础模型(IBM - Ichthyop)的耦合建模系统,以确定产卵事件的位置。使用IBM模型进行的时间向前和向后的数值模拟表明,亚得里亚海中部沿海地区的商业金枪鱼养殖网箱可能是产卵地点。另外两种非商业性物种可能会 opportunistically利用有利的环境(非生物和生物)条件在同一区域产卵。 (注:“opportunistically”这个词在中文语境中可能不太好直接对应一个准确的词,这里保留英文,可根据上下文理解为“伺机地、趁机地”等意思 )