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首页> 外文期刊>Marine biology >Size and spatial arrangement of home range of checkered snapper Lutjanus decussatus (Lutjanidae) in an Okinawan coral reef determined using a portable GPS receiver
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Size and spatial arrangement of home range of checkered snapper Lutjanus decussatus (Lutjanidae) in an Okinawan coral reef determined using a portable GPS receiver

机译：使用便携式GPS接收器确定的冲绳珊瑚礁中方格鲷鱼Lutjanus decussatus（Lutjanidae）的范围的大小和空间排列

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摘要

Although snappers (Lutjanidae) are commercially important fishery resources in tropical and subtropical waters, their home range size and its spatial arrangement have not been sufficiently clarified. In the present study, the size and spatial arrangement of the home range of the reef-associated checkered snapper Lutjanus decussatus (Lutjanidae) were investigated by use of a portable GPS receiver. In a 120 m × 120 m quadrat established on a section of the fringing reef of Ishigaki Island, 29 individuals of the species were identified by their color pattern and individuals were divided into five arbitrary size classes (class 1 < 10 cm TL ≤ class 2 < 15 cm TL ≤ class 3 < 20 cm TL ≤ class 4 < 25 cm TL ≤ class 5). Fish tracking by snorkeling was conducted with the portable GPS receiver. Site fidelity of this species was high. Home range size ranged from 93.0 to 3638.4 m~2, and there was a significant positive correlation between the home range size and fish total length. Home ranges of the same-sized individuals abutted each other (8.8% area overlap), whereas those of different-sized individuals overlapped (44.0% area overlap). Agonistic behavior (attack and agonistic display) was more frequently found among same-sized individuals (times of agonistic behavior/times of all encounters × 100 = 71.3%), whereas such agonistic behavior was rarely found among different-sized individuals (times of agonistic behavior/times of all encounters × 100 = 6.9%). These results suggest that home ranges of Lutjanus decussatus can be regarded as territories against same-sized individuals, but not different-sized individuals. The usefulness of the fish tracking by snorkeling using a portable GPS receiver for home range size estimation and the function of the overlapping territory of the species are discussed.
机译：尽管鲷鱼（Lutjanidae）在热带和亚热带水域中是商业上重要的渔业资源，但它们的栖息地规模及其空间布局尚未得到充分阐明。在本研究中，通过使用便携式GPS接收器调查了与珊瑚礁相关的方格鲷鱼Lutjanus decussatus（Lutjanidae）的栖息地范围和大小。在石垣岛边缘礁上建立的一个120 m×120 m的正方形中，通过颜色模式识别了该物种的29个个体，并将个体分为5个任意大小等级（等级1 <10 cm TL≤等级2） <15厘米TL≤3级<20厘米TL≤4级<25厘米TL≤5级）。使用便携式GPS接收器通过浮潜来跟踪鱼。该物种的部位保真度很高。范围的大小从93.0到3638.4 m〜2，并且范围大小和鱼的总长度之间存在显着的正相关。相同大小个体的住所范围彼此相邻（8.8％面积重叠），而不同大小个体的住所范围相互重叠（44.0％面积重叠）。在同等大小的个体中更经常发现激动行为（攻击和激动显示）（激动行为的次数/所有相遇的次数×100 = 71.3％），而在不同大小的个体中很少发现这种激动行为（激动的次数）所有相遇的行为/次数×100 = 6.9％）。这些结果表明，Lutjanus decussatus的家园范围可被视为针对同等规模的个人的领土，而不是针对不同规模的个人的领土。讨论了使用便携式GPS接收器浮潜进行鱼追踪以进行家庭范围大小估计的有用性以及该物种重叠区域的功能。

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  • 来源
    《Marine biology》 |2008年第6期|p.1103-1111|共9页
  • 作者

    Atsushi Nanami; Hideaki Yamada;

  • 作者单位

    Ishigaki Tropical Station, Seikai National Fisheries Research Institute, Fisheries Research Agency, Fukai-Ota 148-446, Ishigaki, Okinawa 907-0451, Japan;

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  • 正文语种 eng
  • 中图分类 环境生物学;
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