阿拉巴马州莫比尔盆地蓄水前的鱼类洄游

IF 1.6 3区 农林科学 Q3 FISHERIES
Henry J. Hershey, Russell A. Wright, James D. Williams, Patrick E. O'Neil, Dennis R. DeVries
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引用次数: 0

摘要

由于普遍缺乏有关洄游鱼类生活史、栖息地要求和分布的历史数据,评估阿拉巴马州莫比尔河流域几种洄游鱼类的现状变得十分复杂。至于它们的分布是否受到自然或人为洄游障碍的限制,则很难回答,因为在大坝建成之前,几乎没有进行过科学收集,而且最早的大坝建在该流域最大的生物地理障碍处:地质落差线。因此,我们利用现有的信息,包括轶事信息,主要是存档报纸和政府报告中的记录,描述了莫比尔盆地修建大坝之前六种迁徙物种的活动范围。我们描述了阿拉巴马鲥鱼(Alosa alabamae)的复杂历史,并表明 19 世纪末美洲鲥鱼(Alosa sapidissima)的放养可能掩盖了其分布范围的缩小。我们的研究表明,海湾鲟鱼 Acipenser oxyrinchus desotoi 可能洄游到库萨河的落差线以上,并可能与湖鲟鱼 Acipenser fulvescens 为同域鱼类。我们没有发现阿拉巴马鲟鱼 Scaphirhynchus suttkusi 在下降线以上的记录。美洲鳗鲡(Anguilla rostrata)在大坝建成之前曾在莫比尔盆地的每条河流中洄游到下降线以上。最后,桨鱼 Polyodon spathula 可能曾经出现在至少两条河流的跌水线以上,但与其他一些物种不同的是,它们如今仍生活在沿海平原的蓄水河段。我们希望未来的工作将继续考虑档案信息来源,以重新追溯濒危物种的历史。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Pre-impoundment fish migrations in the Mobile Basin, Alabama

Pre-impoundment fish migrations in the Mobile Basin, Alabama

Assessing the status of several migratory fishes in the Mobile River Basin, Alabama, has been complicated due to a general lack of historical data on their life history, habitat requirements, and distributions. Whether distributions were restricted by natural or man-made barriers to migration is difficult to answer because few scientific collections were made before dams were built, and the earliest dams were built at the largest biogeographic barrier in the basin: the geological fall line. Therefore, we used what information was available, including anecdotal information, primarily records from archived newspapers and government reports, to describe the ranges of six migratory species prior to the construction of dams in the Mobile Basin. We describe the complicated history of Alabama Shad Alosa alabamae and show that range declines may have been masked by the stocking of American Shad Alosa sapidissima in the late 19th century. We show that Gulf Sturgeon Acipenser oxyrinchus desotoi probably migrated well above the fall line in the Coosa River, and may have been sympatric with Lake Sturgeon Acipenser fulvescens. We found no records of Alabama Sturgeon Scaphirhynchus suttkusi above the fall line. American Eel Anguilla rostrata migrated above the fall line in every Mobile Basin river before dams were built. Finally, Paddlefish Polyodon spathula may have once occurred above the fall line in at least two rivers, but they persist today in impounded reaches in the coastal plain, unlike some other species. We hope that future work will continue to consider archival sources of information to re-trace the histories of imperilled species.

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来源期刊
Ecology of Freshwater Fish
Ecology of Freshwater Fish 农林科学-海洋与淡水生物学
CiteScore
4.10
自引率
0.00%
发文量
45
审稿时长
12-24 weeks
期刊介绍: Ecology of Freshwater Fish publishes original contributions on all aspects of fish ecology in freshwater environments, including lakes, reservoirs, rivers, and streams. Manuscripts involving ecologically-oriented studies of behavior, conservation, development, genetics, life history, physiology, and host-parasite interactions are welcomed. Studies involving population ecology and community ecology are also of interest, as are evolutionary approaches including studies of population biology, evolutionary ecology, behavioral ecology, and historical ecology. Papers addressing the life stages of anadromous and catadromous species in estuaries and inshore coastal zones are considered if they contribute to the general understanding of freshwater fish ecology. Theoretical and modeling studies are suitable if they generate testable hypotheses, as are those with implications for fisheries. Manuscripts presenting analyses of published data are considered if they produce novel conclusions or syntheses. The journal publishes articles, fresh perspectives, and reviews and, occasionally, the proceedings of conferences and symposia.
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