The Density Distribution and Co-occurred Families of Ichthyoplankton in the Eastern Waters of Taiwan

沿淡水河口進行生態調查中，發現一種紅藻細基龍鬚菜Gracilaria tenuistipitata var.liue地理分布非常狹小。以其耐鹽性加以探討：發現在鹽度5-35‰範圍內其對營養鹽之吸收、光合作用、藻體之生長及囊果之形成及隨後果孢子之發芽與發育等幾乎皆可進行。然而在全海水（35‰）中則其囊果無法形成，此可能為其在臨近開放沿岸水域沒有分布之主因。至於其在河口域多處亦未見分布則可能歸因於缺少適當的底質。

關鍵字

分布；共同出現；浮游性魚；東臺灣

並列摘要

In an ecological survey along the estuary of Tansui river,a predominantred alga,Gracilaria tenuistipitata var.liue was distributed in a somewhat narrowgeographic range as compared to its salinity tolerance.The salinity tolerance test included measures of nutrient absorption,photo-synthesis,growth and cystocarp formation of algal frond and the subsequentgermination and development of carpospore in a salinity range of 5-35‰.Almost all the above measures exhibited positive performance in the testedrange,confirming the euryhalinity of the study species.The incapability of cystocarp formation at 35‰,however,was suspectedto be critical in limiting the distribution of the species studied from a vicinalopen coastal water,whilst the non-distribution of the study species in mostof the esturine area is mainly ascribed to the lack of suitable substratum.

並列關鍵字

Distribution ； Co-occurrence ； Ichthyoplankton ； Eastern Taiwan

國際替代計量

The Density Distribution and Co-occurred Families of Ichthyoplankton in the Eastern Waters of Taiwan

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