Welcome to Chinese Journal of Ecology! Today is Share:

cje

Previous Articles     Next Articles

Otolith characteristics and age determination of Poropuntius huangchuchieni (Tchang, 1962) in Lancang River.

DING Cheng-zhi1,2, CHEN Yi-feng1**, YAO Jing-long1, HE De-kui1   

  1. (1Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; 2Key Laboratory of International Rivers and Transboundary Ecosecurity, Yunnan University, Kunming 650091, China)
  • Online:2013-11-10 Published:2013-11-10

Abstract: Poropuntius huangchuchieni is an endemic fish and an important component of local fisheries in Lancang River. In this study, samplings collected from Buyuan River, a tributary of Lancang River, were aged using a suite of calcified structures including scales, dorsal fin and otoliths. The patterns of sectioned otoliths can be divided into two types: some otoliths recorded as interpretable annuli could be recognized; in other cases, no pattern of alternating zones of opaque and translucent bands, but the daily increment on otoliths can be used to age these fishes. According to the microincrements of sectioned otolith of currentyear individuals, the age of these fishes were 135 to 348 days, and the birthday of P. huangchuchieni was December to June, mainly in January-April. Marginal increment analysis of sectioned otoliths showed that the annuli were formed between April and June each year. The formation of annuli was related with the water temperature and the water level. The opaque band formed between April and June, which was corresponding to the highest temperature and the relatively high water level. The translucent bands formed in seasons with lower water temperature and lower water level. The ages of all samplings ranged from age 1 to 6 for females and age 1 to 5 for males.

Key words: Andrias davidianus, ABC curve, environmental factors, habitat evaluation., macroinvertebrate