TROPHIC ECOLOGY OF LIMPETS AMONG ROCKY INTERTIDAL IN BAHIA LAREDO, STRAIT OF MAGELLAN (CHILE)
TROPHIC ECOLOGY OF LIMPETS AMONG ROCKY INTERTIDAL IN BAHIA LAREDO, STRAIT OF MAGELLAN (CHILE)
复制标题
麦哲伦海峡拉雷多湾岩石潮间带帽贝的营养生态学（智利）
DOI：
10.4067/s0718-686x2014000200006
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Brey
中科院分区：
文献类型：
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作者：
C. Andrade;T. Brey
基于肠道内容物和稳定同位素分析，研究了麦哲伦海峡亚南极岩石-卵石潮间带系统中德拉纳贝（naella deurata）和麦哲伦纳贝（naella magellanica）的食物组成和食物来源。绿微藻（32.5%）、褐藻（22.2%）和红藻（21.3%）是麦哲伦蠓的主要食物成分，绿微藻（28.3%）、微双壳类（27.4%）和有孔虫（20.9%）是麦哲伦蠓的优势食物成分。相对食物种类的贡献表明两种植物都具有通才型的营养策略，尽管褐藻表现出更明显的草食性。稳定的同位素比率证实了这种杂食/食草的生活方式。我们的研究结果与其他研究一致，报告绿色微藻是其他纳藻物种的主要食物，但它们也与这些帽贝是食草动物的普遍观点相矛盾。
Diet composition and food sources of the limpets Nacella deaurata and Nacella magellanica were studied in a subantarctic rocky-boulder intertidal system in the Magellan Strait, on the basis of gut contents and stable isotope analyses. Green microalgae (32.5 %), brown algae (22.2 %) and red algae (21.3 %) constituted the main food items in N. deaurata while green microalgae (28.3 %), micro-bivalves (27.4 %) and foraminiferans (20.9 %) were dominant food components in N. magellanica. Relative food items contribution indicated a generalist-type trophic strategy in both species, albeit N. deaurata exhibited a more pronounced herbivory. Stable isotope ratios confirmed this omnivorous / grazer lifestyle. Our results coincide with other studies that report green microalgae to be the major food item for other Nacella species but they also contradict the common view that these limpets are herbivorous animals.