Hydrobiologia ( IF 2.2 ) Pub Date : 2023-09-26 , DOI: 10.1007/s10750-023-05379-0 Joel W. Yeager , Timothy F. Bonvechio , Martin J. Hamel
We investigated movement dynamics and habitat selection of Suwannee bass (Micropterus notius) in one of few river systems known to house this endemic species of the Southeastern United States. The home range of Suwannee bass ranged from a minimum of 0.15 ha to 142.97 ha (mean = 30.61 ± 7.11 ha). Thirty-four percent of tagged individuals made substantial movements in relatively short amounts of time, with the maximum distance recorded at 28.53 km. Movement from these fish were erratic and unrelated to sex, length, weight, or time of year. The remaining 66% of tagged fish moved little across the study period. Suwannee bass exhibited positive selection preferences for limestone and boulder substrates and a negative selection preference for sandy substrate, indicating that coarse substrates likely play a key role in the life history of the species. The observed variability in movement, the potential for long-distance movements to influence population dynamics, and preference for coarse habitat are important attributes that should be considered for future conservation or management efforts.
中文翻译:
苏旺尼鲈的运动动态及生境选择
我们调查了苏旺尼鲈鱼(Micropterus notius)的运动动态和栖息地选择,该河流系统是已知的美国东南部特有物种的少数河流系统之一。苏旺尼鲈鱼的栖息地范围从最小 0.15 公顷到 142.97 公顷不等(平均值 = 30.61 ± 7.11 公顷)。 34% 的标记个体在相对较短的时间内进行了大幅移动,记录的最大距离为 28.53 公里。这些鱼的运动不稳定,与性别、长度、重量或一年中的时间无关。其余 66% 的标记鱼在研究期间几乎没有移动。苏旺尼鲈鱼对石灰石和巨石基质表现出正选择偏好,而对沙质基质表现出负选择偏好,表明粗糙基质可能在该物种的生活史中发挥着关键作用。观察到的运动变化、长距离运动影响种群动态的潜力以及对粗栖息地的偏好是未来保护或管理工作应考虑的重要属性。