Structural marsh management effects on coastal fishes and crustaceans |
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Authors: | Donna R Rogers Barton D Rogers William H Herke |
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Institution: | (1) School of Forestry, Wildlife, and Fisheries, Louisiana State University Agricultural Center, 70803-6202 Baton Rouge, Louisiana, USA;(2) US Fish and Wildlife Service, Louisiana Cooperative Fish and Wildlife Research Unit, 70803-6202 Baton Rouge, Louisiana, USA |
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Abstract: | Structural marsh management, using levees and water-control structures, is used in the coastal zone for many objectives, for
example, to reduce marsh loss, to enhance waterfowl habitat, to revegetate open-water areas, and to reduce saltwater intrusion.
The literature was evaluated to categorize structural marsh management and to determine some of its effects on fishes and
crustaceans. Structural marsh management had positive effects on standing stock of most resident organisms and negative effects
on marine-transient organisms. Emigration was negatively affected for both resident and marine-transient organisms. Techniques
such as opening structures at critical migration times, designing structures that offer the greatest management flexibility,
and using structures to create a flow-through system could reduce these impacts. More effort should be put into monitoring
managed areas to determine if the objectives are being met and to evaluate the effects on fishes and crustaceans. Although
frequent manipulation could reduce these impacts, the costs and problems incurred may outweigh the anticipated benefits. |
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Keywords: | Marsh management Fish Crustaceans Impoundments Estuaries Water-control structures |
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