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首页> 外文期刊>International Journal of Marine Science >Age and Growth Based on the Scale Readings of the Two Scarid Species Hipposcarus harid and Chlorurus sordidus from Hurgada Fishing Area, Red Sea, Egypt
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Age and Growth Based on the Scale Readings of the Two Scarid Species Hipposcarus harid and Chlorurus sordidus from Hurgada Fishing Area, Red Sea, Egypt

机译：年龄和生长：根据埃及红海洪加达捕捞区的两种恐吓物种沙棘和沙棘（Chlorurus sordidus）的标度读数

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摘要

The study of age and growth of individuals in a population is fundamental for understanding the general biology of the species and in particular its population dynamics. Age and growth of two scarid species Hipposcarus harid and Chlorurus sordidus from Egyptian Red Sea, Hurgada region were studied based on the scale readings using a non-linear back-calculation method. A total of 1000 H. harid (17.0 – 50.0 cm TL)and 700 C . sordidus (16.0–33.5 cm TL) were aged and their maximum life span was 8 and 5 years respectively. The most dominant age group in the catch is the second age group for H. harid (34.7%)and the fourth one for C. sordidus (45.6%). The von Bertalanffy growth parameters obtained by using the back-calculated lengths were L∞ = 57.16 cm TL, K= 0.23 year?1, and t0= ?0.65 years for H. harid and L∞ = 40.27 cm TL, K= 0.28 year?1 and t0= -0.17 years for C. sordidus . These data are needed to assist in the wise management of this potential fishery. It is also clear that more information about the scarid biology and dynamics is needed to establish bases for a responsible fishery development of the Egyptian Red Sea.
机译：研究种群中个体的年龄和生长对于了解该物种的一般生物学，尤其是其种群动态至关重要。根据标度读数，采用非线性反算方法，研究了来自于洪加达地区埃及红海的两种恐慌物种沙棘（Hipposcarus harid）和梭状藻（Chlorurus sordidus）的年龄和生长。总共1000 H.卤素（17.0 – 50.0 cm TL）和700C。 sordidus（16.0-33.5 cm TL）年龄较大，最长寿命分别为8年和5年。渔获量中最主要的年龄组是卤化梭菌的第二个年龄组（34.7％），梭状梭菌的第四个年龄组（45.6％）。使用反算长度获得的von Bertalanffy生长参数为：L∞= 57.16 cm TL，K = 0.23年？1 ，t 0 =？0.65年H. harid和L∞= 40.27 cm TL，C. sordidus的K = 0.28年？1 和t 0 = -0.17年。需要这些数据来帮助对这种潜在渔业进行明智的管理。同样清楚的是，需要更多有关恐吓生物学和动力学的信息，以便为埃及红海负责任的渔业发展奠定基础。

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