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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Varying foraging strategies of Labridae in seagrass habitats: Herbivory in temperate seagrass meadows?
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Varying foraging strategies of Labridae in seagrass habitats: Herbivory in temperate seagrass meadows?

机译：海草生境中Labridae的各种觅食策略：温带海草草甸的草食性？

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摘要

The diets of five species of Labridae in south-western Australia were examined to determine whether: (1) grazing of seagrass and epiphytic algae is a prominent feature of the food web within the deeper seagrass meadows of this temperate region; (2) levels of grazing differ among different seagrass systems; and diets differ among these closely-related species. Fish were collected seasonally from three seagrass habitats mainly comprising either Posidonia sinuosa, Posidonia coriacea or Amphibolis grifflthii between the summer of 1996/97 and spring of 1997. Consumption of considerable amounts of algae and seagrass by Odax acroptilus and seagrass by Haletta semifasciata indicates that macrophyte grazing by fish is a component of the trophic dynamics of south-western Australian seagrass meadows. O. acroptilus and H. semifasciata were both omnivorous, feeding on a range of epifauna, infauna and flora, whereas Siphonognathus radiatus, Neoodax balteatus and Notolabrus parilus were carnivorous, feeding predominantly on motile epifauna, such as molluscs and crustaceans. The level of macrophyte grazing is likely to be underestimated in temperate offshore meadows of P. sinuosa and A. grifflthii where omnivorous labrids, monacanthids and terapontids are abundant. Stable isotope data for O. acroptilus from the study region suggest that animal prey is more important to tissue maintenance than macrophyte material. Macrophytes may be grazed to acquire attached animal prey or for fulfilling energy requirements. Based on the distribution of prey, it appears that species in A. grifflthii meadows forage within and below the seagrass canopy, whilst species in P. sinuosa meadows are likely to forage towards the basal area of this seagrass.
机译：检查了澳大利亚西南部五种Labridae的饮食，以确定是否：（1）在该温带地区较深的海草草地上，海草和附生藻类的放牧是食物网的突出特征； （2）不同海草系统的放牧水平不同；在这些密切相关的物种之间，饮食也有所不同。在1996/97年夏季至1997年春季之间，从三个海草生境中季节性采集鱼类，这三个海草生境主要包括波塞冬草，波塞冬草或Amphibolisgrifflthii。Odaxacroptilus食用大量藻类和海草，Haletta semifasciata食用海草表明这是大型植物鱼吃草是澳大利亚西南海草草甸营养动态的一部分。 O. acroptilus和H. semifasciata都是杂食性的，以一系列表生动物，动物和植物为食，而Radionaus radionaus，Beoteax balteatus和Notolabrus parilus是食肉的，主要以活动性表生动物为食，例如软体动物和甲壳类。在杂食性瓢虫，褐藻类和类萜类植物大量存在的温带P. sinuosa和A. grifflthii的近海草甸上，大型植物的放牧水平可能被低估了。来自该研究区的新黄曲霉的稳定同位素数据表明，与大型植物材料相比，动物猎物对组织的维护更为重要。可以放牧大型植物来获取附着的动物猎物或满足能量需求。从猎物的分布来看，格里弗氏草地草甸中的物种似乎在海草冠层之内和之下觅食，而中国草地草甸中的物种则可能向该海草的基部觅食。

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