The effect of predation on the life histories of Littorina obtusata and Littorina mariae
The effect of predation on the life histories of Littorina obtusata and Littorina mariae
复制标题
捕食对钝蠹和玛丽亚蠹生活史的影响
DOI：
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发表时间：
1992
影响因子：
1.2
通讯作者：
G. Williams
中科院分区：
文献类型：
--
作者：
G. Williams
钝叶玉黍螺（Littorina obtusata）是一种附生腹足类，其寄主为一种长寿的褐色珊瑚虫，其寿命为三至四年。大多数种群由成年人组成，全年存在的大小范围为14至17毫米。新孵化的个体出现在4月至10月之间，7月达到高峰;未成熟的皱纹生长到5月与成年群体合并。相比之下，玛丽玉黍螺是一年生的;新孵化的个体在第一年的冬天就成熟了。那些达到成熟越冬的成年人，但很少有生活超过春天的第二年。对该虫的种群动态进行了研究。mariae与其赖以生存的锯缘墨角藻生物量的变化密切相关。
Littorina obtusata is an epiphytic gastropod which lives for three to four years on its host Ascophyllum nodosum, a long-lived brown alga. Most of the population consists of adults, present throughout the year in the size range 14 to 17 mm. Newly hatched individuals appear between April and October with a peak in July; the immature winkles grow to merge with the adult cohort in May. In contrast Littorina mariae is an annual; newly hatched individuals grow to maturity by the winter of their first year. Those reaching maturity overwinter as adults but very few live beyond spring of their second year. The population dynamics of L. mariae are closely linked with changes in the biomass of the alga Fucus serratus on which it lives.