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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Scaling of bite performance with head and carapace morphometrics in green turtles (Chelonia mydas)
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Scaling of bite performance with head and carapace morphometrics in green turtles (Chelonia mydas)

机译：绿海龟（Chelonia mydas）的头部和甲壳形态学特征与咬合性能的比例缩放

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摘要

Adult green turtles (Chelonia mydas) are unusual relative to other sea turtles in that they are predominately herbivorous. This herbivorous diet is reflected in the serrated morphology of their beak, bite performance and the relative morphometrics of their heads. Recent bite performance data in loggerhead turtles (Caretta caretta), which are known for their durophagous capability, have demonstrated that bite force is correlated with head morphometrics. The objective of this study was to characterize bite force in green turtles and correlate bite performance with head and carapace morphometrics. We predicted that maximum bite force in green turtles would be less in magnitude relative to loggerheads, but would be positively correlated with head morphometrics. Therefore, mass, straight carapace length, straight carapace width, greatest head width, height, and length were collected with bite force from free-ranging green turtles from Punta Abreojos, Baja California Sur, Mexico and Otsuchi, Japan. Subjects ranged from 10.9 to 48 kg, with straight carapace length and width ranged from 40.6 cm to 71.9 cm (mean ＝ 563 ± 8.5 cm) and from 33.5 cm to 55.9 cm (mean ＝ 445 ± 5.7 cm), respectively. A bite force apparatus was used to collect bite performance from subjects. The maximum bite force was 303 N. Mean head width, head height, and head length were 8.7 ± 1.2,8.2 ±1.1, and 11.5 ± 1.5 cm, respectively. Bite force was lower in magnitude than reported for loggerhead turtles as predicted but still strong enough to process algal and plant matter, as well as crush many hard prey items. Simultaneous measurements of body and head size, and the use of non-linear reduced major axis regression, show that bite force scaled isometrically relative to body size and head size. Simple correlation showed that all logged transformed morphometrics were good predictors of logged bite performance, but an AICc-based weighted regression showed that body mass, followed by head width and head height, were better predictors of bite force than carapace size.
机译：成年绿海龟（Chelonia mydas）相对于其他海龟而言是不寻常的，因为它们主要是草食性的。这种草食性饮食体现在其喙的锯齿状形态，咬合表现和头部的相对形态上。最近的龟的咬咬性能数据，以其吞噬能力而著称，已证明咬咬力与头部形态有关。这项研究的目的是表征绿海龟的咬合力，并将咬合表现与头部和甲壳的形态计量学联系起来。我们预测，绿海龟的最大咬合力相对于黑头的幅度较小，但与头部形态学呈正相关。因此，用咬合力从墨西哥下加利福尼亚州蓬塔阿布里埃霍斯，日本墨西哥大冢市的自由放养绿海龟的咬合力中收集了质量，直甲壳长度，直甲壳宽度，最大头部宽度，高度和长度。受试者的体重在10.9至48千克之间，直甲的长度和宽度分别在40.6厘米至71.9厘米（平均＝ 563±8.5厘米）和33.5厘米至55.9厘米（平均＝ 445±5.7厘米）之间。使用咬合装置收集受试者的咬合表现。最大咬合力为303N。平均头部宽度，头部高度和头部长度分别为8.7±1.2、8.2±1.1和11.5±1.5 cm。咬合力的大小低于预期的龟，但仍足以处理藻类和植物，以及压碎许多坚硬的猎物。同时测量身体和头部的大小，以及使用非线性减少的主轴回归，显示咬合力相对于身体尺寸和头部大小等轴测。简单的相关性表明，所有测得的变换形态计量学都是测得咬住性能的良好预测指标，但是基于AICc的加权回归表明，与甲壳大小相比，体重（其次是头部宽度和头部高度）更好地预测了咬合力。

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    Christopher D. Marshall; John Wang; Axayacatl Rocha-Olivares; Carlos Godinez-Reyes; Shara Fisler; Tomoko Narazaki; Katsufumi Sato; Blair D. Sterba-Boatwright;

  • 作者单位

    Department of Marine Biology, Texas A&M University, 200 Seawolf Parkway, Galveston, TX 77551, USA,Department of Wildlife & Fisheries Sciences, Texas A&M University, College Station, TX, USA;

    Joint Institute for Marine and Atmospheric Research, University of Hawaii at Manoa, 2570 Dole Street, Honolulu, HI 96822, USA;

    Centro de Investigacion cientifica y de Educacion Superior de Ensenada, Ensenada, Baja California, Mexico;

    APFF Islas del Golfo de California in Baja California, Comision National de Areas Naturales Protegidas, Bahla de los Angeles, Baja California, Mexico;

    Ocean Discovery Institute, San Diego, CA, USA;

    International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba Prefecture, Japan;

    International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba Prefecture, Japan;

    Department of Mathematics and Statistics, Texas A&M University-Corpus Christi, Corpus Christi, TX, USA;

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  • 正文语种 eng
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  • 关键词

    Bite force; Feeding Performance; Marine turtles; Morphometrics; Chelonia;

    机译：咬力;饲养性能海龟;形态计量学凯洛尼亚;

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