Trophodynamic modeling of walleye pollock (Theragra chalcogramma) in the Doto area, northern Japan : model description and baseline simulations
Trophodynamic modeling of walleye pollock (Theragra chalcogramma) in the Doto area, northern Japan : model description and baseline simulations
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日本北部道东地区的狭鳕 (Theragra chalcogramma) 营养动力学模型：模型描述和基线模拟
DOI：
10.1111/j.1365-2419.2004.00319.x
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发表时间：
2004
影响因子：
2.6
通讯作者：
O. Yamamura
中科院分区：
文献类型：
--
作者：
O. Yamamura
建立了年龄结构的营养动力学模型，定量分析了日本太平洋种群主要育苗地道渡地区狭鳕（Theragra chalcogramma）定居后死亡和生长的影响因素。该模型包括(i)鳕鱼的多个年龄等级，（ii）一般捕食者，（iii）渔业，（iv）鳕鱼的主要猎物。考虑的主要过程是(i)招募，（ii）自下而上控制体细胞生长，（iii）由于捕食，同类相食和捕鱼而导致的死亡，（iv）大小选择性猎物选择，(v)依赖温度的生物能量学，如转换效率和每日消耗率，以及（vi）猎物的生产和顺流供应。通过假设狭鳕根据相对丰度和捕食者-猎物大小的关系选择猎物，该模型准确地模拟了饮食中的季节性和个体发生变化。然而，考虑到个体发生分离，模型显示，由于同类相食，新招募的鱼将在定居后6个月内全部被吃掉。考虑分离（春季重叠10%，其他季节重叠0.1%），在不同季节和鱼的大小下，模拟和经验数据之间的一致性平均为82.7%。在模型域中，狭鳕最重要的猎物——绿腹鱼的捕食影响最大（22.2±5.3 WWg m）2 yr)1，超过了狭鳕的年产量（17.2±0.1 WWg m）2 yr)1，表明狭鳕种群的生存需要充足的猎物供给。在春夏两季，小狭鳕（200毫米）和大狭鳕（200毫米）的日平均摄取量分别为1.2和0.6%。
An age-structured trophodynamic model was constructed to quantitatively analyze factors affecting postsettlement mortality and growth of walleye pollock (Theragra chalcogramma) in the Doto area, the main nursery ground of the Japan Pacific population. The model included (i) multiple age classes of pollock, (ii) a generic predator, (iii) fisheries, and (iv) major prey of pollock. Major processes considered were (i) recruitment, (ii) bottom-up control of somatic growth, (iii) mortality because of predation, cannibalism and fishing, (iv) size-selective prey selection, (v) temperature-dependent bioenergetics such as conversion efficiency and daily consumption rate, and (vi) production and advective supply of prey. By assuming that pollock select prey based upon both relative abundance and predator‐prey size relationships, the model accurately simulated seasonal and ontogenetic variations in the diet. However considering ontogenetic segregation,themodelshowedthat,duetocannibalism, newly recruited fish would be totally consumed within 6 months after settlement. By considering segregation (10% overlap during spring and 0.1% during other seasons), an agreement of diet between the simulation and empirical data averaged 82.7% for the different seasons and fish sizes. Euphausiids, the most important prey of pollock, suffered the highest predation impact (22.2 ± 5.3 WWg m )2 yr )1 ) exceeding annual production in the model domain (17.2 ± 0.1 WWg m )2 yr )1 ), indicating that an advective supply of prey is necessary to support the pollock population. The daily ration of pollock during spring and summer averaged at 1.2 and 0.6% BW day )1 for small (£200 mm) and large (>200 mm) pollock,
北太平洋西部亚北极和过渡水域中的菌鱼、Diaphus theta、Stenobrachius leucopsarus 和 S. nannochir 的化学成分
DOI：
--
发表时间：
2008
期刊：
Journal of the Marine Biological Association of the United Kingdom 88(4)
影响因子：
--
作者：
Tetsutaro Takikawa;Akihiko Morimoto;Goh Onitsuka;Atsushi Watanabe and Masatoshi Moku;Masatoshi Moku and Kouichi Kawaguchi
通讯作者：
Masatoshi Moku and Kouichi Kawaguchi