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Free Content Seasonal Variations in Species Diversity, Abundance, and Composition of Fish Communities in the Northern Indian River Lagoon, Florida

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We analyzed data from a long-term fisheries-independent monitoring program to quantitatively assess seasonal variations in species diversity, abundance, and composition of fish communities in the northern Indian River Lagoon. Between fall 1990 and 1993, over 2.24 million fish representing 108 species and 43 families were collected by using seines, trawls, and gillnets during seasonal stratified-random sampling and monthly fixed-station sampling regimes. Seasonal collections were numerically dominated by less than 10 small estuarine forage species including Anchoa mitchilli, Menidia spp., Floridichthys carpio, and Lucania parva which were present in high abundances throughout the year. We observed strong seasonal patterns in abundance measures for several less common or transient species collected from shallow-water habitats (e.g., Brevoortia spp., Trachinotus falcatus, Caranx hippos, Cynoscion nebulosus, and Leiostomus xanthurus) and from lagoon-basin habitats (e.g., Micropogonias undulatus and Diapterus auratus). Estimates of species richness and abundance were directly correlated with water temperature, reaching maxima during summer or fall and minima during winter. Species diversity (H′) ranged from 0.9–1.4 and followed similar seasonal trends. This study provides baseline estimates of seasonal variations in fish communities of the northern Indian River Lagoon, based on comprehensive sampling techniques, that can be used for future comparisons of Indian River Lagoon fish communities.

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Document Type: Research Article

Publication date: 1995-07-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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