Evaluating the Effects of Urban Land Use on the Condition of Resident Salt Marsh Fish
Evaluating the Effects of Urban Land Use on the Condition of Resident Salt Marsh Fish
复制标题
评估城市土地利用对居住盐沼鱼类状况的影响
DOI：
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发表时间：
2015
影响因子：
2.7
通讯作者：
Dennis R. DeVries
中科院分区：
文献类型：
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作者：
Madeline Wedge;C. Anderson;Dennis R. DeVries
城市化会降低包括盐沼在内的重要生境的质量，从而影响沿海渔业。同样，潮汐小溪周围城市土地使用的增加可以通过改变盐度，改变栖息地结构和增加污染来影响鱼类的健康。在这项研究中，我们调查了住宅城市土地利用对墨西哥湾沿着盐沼常驻鱼类状况的影响。在亚拉巴马和西佛罗里达，沿沿着盐沼口附近的六个二级潮沟（三个周围的住宅开发和三个主要由森林包围）鱼类季节性采样。大底鱼和宽鳍花为优势种，分别占总渔获量的65%（n = 3588）和15%（n = 777）。全F。评价了大熊猫和宽鳍大熊猫的质量、长度和长度-重量关系。进一步分析了一个子集（分别为745和367）的热量密度和肝体指数（LSI）的条件措施。每长度的质量关系没有不同的城市和参考小溪的F。grandis或P. latipinna;然而，参考小溪产生F. grandis和P. latipinna的体积明显更大。此外，F.与参考相比，grandis和P. latipinna在城市小溪中的LSI和热量密度显著降低。这两个物种表现出季节性的有条件的措施，可能与繁殖和年度育肥周期。城市和参考小溪之间的鱼类条件的差异可能反映了食物供应/质量，小溪盐度制度，盐沼结构的差异。
Urbanization can impact coastal fisheries by reducing the quality of important habitats, including salt marshes. Similarly, increased urban land use surrounding tidal creeks can impact the health of fish by changing salinities, altering habitat structure, and increasing exposure to pollution. In this study, we investigated the effects of residential urban land use on the condition of salt marsh resident fish along the northern Gulf of Mexico. Fish were sampled seasonally using minnow traps along salt marshes near the mouth of six second-order tidal creeks (three surrounded by residential development and three surrounded primarily by forest) in Alabama and west Florida. Fundulus grandis and Poecilia latipinna were the dominant species representing 65 % (n = 3588) and 15 % (n = 777) of the total number of fish caught, respectively. All F. grandis and P. latipinna were evaluated for mass, length, and length-weight relationship. A subset (745 and 367, respectively) was further analyzed for conditional measures of caloric density and liver somatic index (LSI). The mass per length relationships did not differ between urban and reference creeks for either F. grandis or P. latipinna; however, reference creeks yielded F. grandis and P. latipinna that were significantly larger. Further, F. grandis and P. latipinna had significantly lower LSI and caloric density in urban creeks compared to reference. Both species showed seasonal patterns of conditional measures that were likely related to reproduction and annual fattening cycles. Differences in fish condition between urban and reference creeks may reflect differences in food availability/quality, creek salinity regimes, and salt marsh structure.