Iris Publishers-Journal of Oceanography & Marine Biology| Reviewing Research About the Early Life History of Freshwater Fish in China

 

Authored by Yanfei Huang

Recruitment strength is well recognized to be determined in the first year of fish and is closely related with growth and survival rate in the early life history [1]. Numerous studies have attempted to understand recruitment mechanism and predict population dynamics by analyzing occurrence, abundance, growth and mortality rate and its relationship with environmental variables in the larval and juvenile stages [2] Early life history studies have been highly developed since 1914, when Hjort first proposed that variation in larval survival could generate recruitment variability [3] Research contents of early life history can be categorized into three aspects: ontogenetic development and identification, distribution and abundance, and growth and survival. Larval species can be identified by morphological characters and molecular analysis [4] Spatial and temporal changes on larval occurrence and abundance in relation with environmental factors have been widely documented [5,6] Larval dispersal is an important component of understanding distribution and recruitment [7] Spatial and temporal variations on growth and mortality rates and its relationship abiotic and biotic factors are essential for revealing recruitment mechanism [8] In addition, the ‘growth-mortality’ hypothesis has been verified and implemented in many studies.

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