Experimental Analysis on Allometric Growth in Spualiobarbus curriculus Larvae and Juveniles in Zhaoqing Reach of the Pearl River

Ecological experiment was conducted in this paper to study the allometric growth in Squaliobarbus curriculus larvae and juveniles from Zhaoqing Reach of the Pearl River. The results showed that after first feeding, the organs associated to swimming, feeling and feeding of larvae differentiated rapidly, and exhibited allometric growth. The head length, tail length and head height exhibited positive allometric growth, while trunk length exhibited negative allometric growth before reaching the growth inflexion point 20 d after first feeding, and positive allometric growth after the inflection point. Body height exhibited positive allometric growth both before and after the growth inflexion point at 18 d after first feeding. The inflexion points of snout length, eye diameter and post-eye head length occurred 23, 19 and 16 d after first feeding. For swimming organs, the dorsal fin, pelvic fins and anal fin exhibited positive allometric growth both before and after the inflexion point at 18, 19 and 17 d after first feeding; but the tail fin exhibited positive allometric growth before the inflexion point at 14 d after first feeding, and negative allometric growth after the inflexion point. S. curriculus larvae can possess various abilities soon after first feeding to survive at early stage due to the rapid development of swimming, feeling, feeding and other organs, which has important ecological significance to adapt to the complex external environment.

Resource constraint,sustainable economic growth pattern and transformation of economic system in China

Over the past 20 years, China has made spectacular achievements in economic growth as well as in thetransformation of economic growth pattern. Industrial structure is being updated, and technology is playing a more andmore important role in economic development. The energy and resource consumption in many industries and enterprisesare reducing. However, we should realize that there are still many problems in changing the economic growth pattern,such as high input, high consumption, high discharge, inharmony, recycling difficulty, and low efficiency, which havegreatly impaired and restrict Chinese economic development. Therefore, the fundamental change of the economic growthpattern is inevitable. Based on the analysis on the status quo and the exploit of resources, this paper suggests that thetransformation from unsustainable to sustainable growth is the only choice in changing the economic growth pattern. Inaddition, the transformation should not completely rely on the fundamental effects of market mechanism. We should makefull use of the power of governments to speed up the transformation of economic system.