Photos of the Long Island Sound

Research & Monitoring

Status and Trends: LISS Environmental Indicators

Fish Population in Long Island Sound


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Warm Water/Cold Water Fish Index

The Warm Water/Cold Water fish index is an indicator of whether the fishery is sensitive to changes in water temperature, and to long-term climate change trends. View Indicator


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Shad & Blueback Herring—Long Island Sound

Abundance of American shad and blueback herring, as reported in the Long Island Sound Trawl Survey. View Indicator


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Game Fish

The abundance of game fish is a reflection of the productivity of Long Island Sound and the effectiveness of coast-wide fishery management plans that seek to stabilize populations while maximizing harvest opportunities. View Indicator


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Finfish Biomass Index/Species Richness

Fish biomass indicates the productivity of the Long Island Sound fishery. Species richness measures the diversity of species supported within the Sound's various habitats. View Indicator


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Forage Fish – Open Water/NY and CT Coastlines

The forage indices measures the productivity of small fish in the Sound, which is the basis of the food supply for larger fish, including game fish. View Indicator

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