管理Centrarchid渔业在河流和小溪BOB国际体育

人口和生活史特征的两种Micropterus弗林特河系统,格鲁吉亚

史蒂文·m·萨蒙斯特拉维斯r·英格拉姆和约翰·m·基尔帕特里克

doi:https://doi.org/10.47886/9781934874523.ch10

抽象的。即低音Micropterus种虫害是美国东南部的河流渔业的重要组成部分BOB国际体育,but little is known about their basic life history and population characteristics in these systems. Largemouth Bassm . salmoides和浅滩低音m . cataractae收集三个领域的弗林特河从2005年到2013年在多个场合。无坝部分的集合被上面的弗林特河Blackshear湖,在湖Blackshear,受监管的河流湖泊Blackshear以下。在湖Blackshear Shoal低音不发生,所以只收集大嘴鲈鱼。人口和生活历史数据等身体条件、增长、死亡率,和招聘可变性检查这些物种在所有三个领域。Shoal低音和大嘴鲈鱼似乎也有类似的增长范围在此系统中,达到类似的最大大小。然而,大嘴鲈鱼增长低于两河Shoal低音部分。两个物种增长较慢的在河的上部和下部区域;低增长之间的大嘴鲈鱼相似Blackshear弗林特河和湖。女性大嘴鲈鱼增长速度比男性在河的两部分;然而,Shoal低音两性之间相似的增长。 Longevity of Largemouth Bass appeared to be slightly higher than Shoal Bass, with correspondingly lower annual mortality. Age frequencies and annual mortality was similar between the sexes for both species in all areas. Recruitment of Largemouth Bass was negatively affected by high flows in the spring in the upper Flint River and Lake Blackshear; whereas, Shoal Bass recruitment in the upper Flint River was not correlated to any flow measure. The opposite pattern was found in the lower Flint River, with recruitment of Largemouth Bass unaffected by flow but Shoal Bass recruitment negatively affected by high flows. Shoal Bass exhibited numerous differences from Largemouth Bass in the Flint River, including growth, mortality, and recruitment, demonstrating the danger in applying rate function data or basic biology concepts from one species to another closely related one. Results from this study will help biologists better understand the potential and limitations of black bass fisheries in rivers, and thereby enable more effective management.