Life history, population structure, and movement of gobid fishes in tropical urban and non-urban watersheds
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Concerns about the impacts and threats to stream ecosystems are augmenting as urbanization in Puerto Rico is increasing at a rapid rate. Pollution, channelization and damming are some of these threats associated with urbanization increment. Previous studies have assessed urbanization impacts on macrobiota communities, as fishes and shrimps, in tropical streams. Most of these tropical island stream communities have marine ancestors. These species with marine-freshwater linkages at some point in their life cycle, are diadromous. In Puerto Rico, all seven native fish species are suspected to be diadromous species. Therefore, these species play an important role in streams as well as in coastal ecosystems. In addition, the native fish species have recreational and commercial fishery value. However, the ecology and life history of these species are not clearly studied. For this reason, assessing the impacts on population structure and migratory behavior of diadromous species will provide critical information needed to further understand and manage fish communities in tropical island streams.