Abstract
Abstract Habitat suitability index (HSI) models were used to map habitat quality for eight fish and invertebrate species in Casco Bay and Sheepscot Bay, Maine. Habitat suitability index modeling can be used to support a wide range of management needs involving species or habitat mapping, including analysis of essential fish habitat. The HSI values were calculated as a function of a species' habitat associations and mapped available habitat. Based on published information and expert review, models for two to four life stages were developed for alewives Alosa psuedoharengus, American sand lances Ammodytes americanus, Atlantic salmon Salmo salar, Atlantic tomcods Microgadus tomcod, common mummichogs Fundulus heteroclitus, winter flounder Pleuronectes americanus, American lobsters Homarus americanus, and softshell clams Mya arenaria. Using geographic information systems (GIS), habitat maps for each bay were developed consisting of 100 × 100-m grid cells for seasonal temperature and salinity and for depth and ...
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