In reef ecosystems, vulnerability to exploitation is species-specific and may vary with natural abundance, life history characteristics, or ease of capture. Therefore, understanding the growth parameters and exploitation rate of individual species is important, because application of a uniform management strategy in species with different responses or vulnerability to exploitation can be inappropriate. In this study, growth parameters (length at first maturity, length at optimum yield, asymptotic length, growth constant, and growth performance index) and mortality from two Acanthurus fish species were compared, to deduce whether differences in species-specific traits (spawning mating behaviour) could lead to differences in exploitation rate. Despite comparable estimates of the von Bertalanffy asymptotic length (L$\infty$) in the two species [A. triostegus (27.9–29.6) and A. leucosternon (26.1–27.4)], the growth coefficient constant (K) estimates for A. triostegus (0.85–1.23) were almost three to fivefold higher than those of A. leucosternon (0.29–0.38), suggesting that A. triostegus attains its maximum length faster than A. leucosternon. Length at first maturity (Lm), length at optimum yield (Lopt), and exploitation rate (E) were also different between the two species, specifically indicating exploitation beyond the sustainable yield in A. triostegus but not in A. leucosternon. The finding of a higher exploitation rate in A. triostegus as compared to A. leucosternon could suggest that regardless of similar body sizes, the former is more susceptible to exploitation.

在珊瑚礁生态系统中，对开发的脆弱性因物种而异，可能因自然丰度、生活史特征或捕获难易程度而异。因此，了解单个物种的生长参数和开发率很重要，因为对具有不同响应或开发脆弱性的物种应用统一的管理策略可能是不合适的。在这项研究中，两个Acanthurus 的生长参数（首次成熟时的长度、最佳产量时的长度、渐近长度、生长常数和生长性能指数）和死亡率对鱼类种类进行了比较，以推断物种特定性状（产卵交配行为）的差异是否会导致开发率的差异。尽管 von Bertalanffy 渐近长度 (L$\infty$）在两个物种[ A. triostegus（27.9-29.6）和A. leucosternon（26.1-27.4）]，生长系数常数（K）估计A. triostegus（0.85-1.23）几乎三到五倍比更高的A. leucosternon（0.29-0.38），这表明A. triostegus达到其最大长度比更快A. leucosternon。两个物种的首次成熟长度 (Lm)、最佳产量长度 (Lopt) 和开发率 (E) 也不同，特别表明在A. triostegus 中的开发超出了可持续产量，但在A. leucosternon 中没有。发现更高的开采率与A. leucosternon相比，A . triostegus可能表明，无论体型如何相似，前者更容易受到剥削。