Distribution in relation to life history in the direct-developing gastropod Batillaria cumingi (Batillariidae) on two shores of contrasting substrata
Distribution in relation to life history in the direct-developing gastropod Batillaria cumingi (Batillariidae) on two shores of contrasting substrata
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DOI：
10.1093/mollus/65.3.275
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发表时间：
1999-08-01
影响因子：
1.2
通讯作者：
Wada, K
中科院分区：
文献类型：
--
作者：
Adachi, N;Wada, K
研究了在不同底质的两岸直接发育腹足类--三角海蚌（Batillariacumingi）的种群结构和空间分布。砂泥海岸和岩石海岸种群的大小结构不同，第一年的蜗牛是约。两个种群的壳长（SL）为15 - 25 mm，而第二年的蜗牛，与老的队列合并，在砂泥海岸种群中测量到15-25 mm的SL。岩石海岸种群的SL为15 mm。卵的分布匹配成人分布在砂泥海岸人口，但更多的限制比成人在岩石海岸人口。两个种群中的新生幼体（0-1 mm SL）的分布受到限制，但两个种群中蜗牛扩展其分布的生长阶段不同;砂泥海岸上的SL为1-2.5 mm，岩石海岸上的SL> 5 mm。早期青少年实现的漂浮（约。2 mm SL），在砂泥种群中较常见，而在石质海岸种群中较少见。的：沙泥海岸种群中1-2.5 mm SL生长阶段分布的突然扩大被认为是由漂浮引起的，而岩石海岸种群中较老生长阶段（> 5 mm SL）分布的扩大可能是由爬行引起的。
Population structure and spatial distribution with growth of the direct-developing gastropod, Batillaria cumingi, were investigated on two shores of differing substrate. Sand-mud shore and rocky shore populations differed in size structure; first-year snails were ca. 7 mm in shell length (SL) in both populations, whereas second-year snails, merging with older cohorts, measured 15-25 mm SL in the sand-mud shore population and ca. 15 mm SL in the rocky shore population. Egg distribution matched adult distribution in the sand-mud shore population, but was more restricted than that of adults in the rocky shore population. The distribution of newly-hatched juveniles (0-1 mm SL) was restricted in both populations, but the growth stage at which snails extended their distribution differed between the two populations; 1-2.5 mm SL on the sand-mud shore and > 5 mm SL on the rocky shore. Floating achieved by early juveniles (ca. 2 mm SL), was commonly observed in the sand-mud population, but rarely in the rocky shore population. The: sudden expansion in distribution of the 1-2.5 mm SL growth stage in the sand-mud shore population is considered to have been caused by floating, while expansion of the distribution of older growth stages (> 5 mm SL) in the rocky shore population probably occurs by crawling.