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首页> 外文期刊>Marine biology >Ontogeny of space use and diet of two temperate damselfish species, Parma microlepis and Parma unifasciata
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Ontogeny of space use and diet of two temperate damselfish species, Parma microlepis and Parma unifasciata

机译：两种温带雀鲷物种Parma microlepis和Parma unifasciata的空间利用和饮食结构的个体发育

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摘要

Studies of reef fish herbivory have mainly focused on the impacts and behaviour of adults of tropical species. In this study, the ontogenetic shifts in home range, aggression, feeding rate, diet and gut morphology in juveniles and adults of two temperate territorial damselfishes, Parma microlepis and Parma unifasciata, were determined. Both P. microlepis and P. unifasciata juveniles under 80 mm TL exhibited no aggressive chases towards conspe-cifics or other species, while above 80 mm TL aggressive chase frequency increased in conjunction with an increase in home range, defended as a territory. Ontogenetic diet shifts, characterised by an increase in herbivory (P. unifasciata: juveniles: 64% plant material, adults: 95% plant material; P. microlepis: juveniles: 43% plant material, adults: 67% plant material) were observed for both species. The ratio of digestive tract length to body length, which often accompanies a switch to herbivory, increased significantly with ontogeny for both species. Compared to tropical confamilial grazers, these temperate damselfish species feeding rates were lower, and they had larger territories which were not as strongly defended (fewer aggressive chases).
机译：礁鱼草食性的研究主要集中于热带物种成年的影响和行为。在这项研究中，确定了两个温带地区豆娘（Parma microlepis和Parma unifasciata）在幼年和成年后的家谱，侵略性，进食率，饮食和肠道形态的个体发生变化。 TL小于80 mm的小鳞尾小and和Unifasciata幼体均未表现出对专精或其他物种的积极追击，而TL大于80 mm TL的积极性追捕频率随家境的增加而增加，被视为领土。观察到以草食性增加为特征的个体饮食结构改变（P. unifasciata：幼虫：64％植物材料，成年：95％植物材料； microlepiss：幼虫：43％植物材料，成年：67％植物材料）两种。两种个体的消化道长度与体长之比通常伴随着向草食性的转变而显着增加。与热带的同伴放牧者相比，这些温带的雀鲷物种的摄食率较低，并且它们的领土更大，但防御程度却不那么强（攻击性追逐次数更少）。

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  • 来源
    《Marine biology》 |2009年第7期|1497-1505|共9页
  • 作者

    Emily C. Buckle; David J. Booth;

  • 作者单位

    Department of Environmental Sciences, University of Technology, Sydney, PO Box 123, Sydney, Broadway, NSW 2007, Australia;

    Department of Environmental Sciences, University of Technology, Sydney, PO Box 123, Sydney, Broadway, NSW 2007, Australia;

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