罗马尼亚黑海沿岸鲱鱼的种群参数和开发率估计(英文)
——ESTIMATES OF THE POPULATION PARAMETERS AND EXPLOITATION RATE OF PONTIC SHAD (ALOSA IMMACULATA BENNETT, 1835) IN THE ROMANIAN BLACK SEA COAST
摘要
Sex ratio, morphometric characteristics, age and growth for Pontic shad from Romanian Black Sea Coast were examined. A total of 2.133 individuals were caught between March 2012 and September 2013. Female : male sex ratio was 0.62. According to the age reading, distribution varied form II to V year. The von Bertalanffy equation and growth performance index were determined by ESP software in Pontic shad. The asymptotic length (L∞ = L infinity) of Pontic shad generated by the ELEFAN I method, after introducing total length data for the two years of study, was 41.5. The natural mortality instantaneous coefficient (M) of the entire Pontic shad population, calculated according to Pauly’s empirical equation, using the growth parameters of the Von Bertalanffy formula and the mean annual temperature of the two study years of 13oC, recorded the following values: M = 0.585 in 2012 and M = 0.639 in 2013. According with the resultants, it is recommended to perform a sustainable fishing which allows the capture of legal-sized of fish.
正文
hy00114-罗马尼亚黑海沿岸鲱鱼（ALOSA IMMACULATA Bennett，1835）的种群参数和开发率估计(英文).pdf
备注
文献为PDF格式，语种为英文，共6页。
