- 作者: Tai-Sheng Chiu ; Jiunn-Bin Huang
- 中文摘要: The RNA/DNA ratios of Japanese anchovy (Engraulis japonica) larvae caught from the northeastern waters of Taiwan were examined and compared in this study. Four types of water masses can be distinguished in the area; thus, four hydrographic regions are defined as the southern East China Sea (SECS), Kuroshio (KUR), surface mixing water (MIX) of SECS and KUR, and upwelling water (UWW) from subsurface KUR. The nucleic acid contents of individual larva were measured, and the RNA/DNA ratio was used as an index to compare the nutritional condition of larvae from among the waters. In general, the RNA and DNA contents were related to body size, but the RNA content had higher variability in correspondence to hydrographic differences. Larvae from the KUR showed a significantly lower RNA/DNA ratio than did those from the SECS, MIX and UWW. Finally, a relatively poor nutritional condition of Japanese anchovy larvae in the KUR is inferred, and the distribution pattern of Japanese anchovy in the waters around Taiwan is explained.
- 英文摘要: --
- 中文關鍵字: nutritional condition, anchovy, East China Sea, Kuroshio
- 英文關鍵字: --