Accession Number : ADA322728

Title :   Evaluation of Habitat Suitability Index Models for Riverine Life Stages of American Shad, with Proposed Models for Premigratory Juveniles.

Descriptive Note : Biological rept. no. 14,

Corporate Author : FISH AND WILDLIFE SERVICE WASHINGTON DC

Personal Author(s) : Ross, Robert M. ; Backman, Thomas W. ; Bennett, Randy M.

PDF Url : ADA322728

Report Date : JUL 1993

Pagination or Media Count : 32

Abstract : Field evaluations of existing habitat suitability index (HSI) models for spawning adults, eggs, and larvae of American shad (Alosa sapidissima) were conducted in 1990-92; initial models for juveniles in nursery habitats were developed. Fish abundance in various habitats of the upper Delaware River was quantified by (1) observation of adult spawning activity, (2) collection of eggs and larvae with metered plankton and drift nets, and (8) enumeration of juveniles by underwater observation and seining techniques. Regression analysis, principal component analysis, and range analysis were used to relate abundance to an array of physical habitat variables potentially influencing fish distributions.

Descriptors :   *HABITATS, *EGGS, *LARVAE, *FISHES, *PLANKTON, MODELS, DISTRIBUTION, PHYSICAL PROPERTIES, OBSERVATION, FIELD TESTS, VARIABLES, REGRESSION ANALYSIS, DRIFT, INDEXES, COLLECTION, ADULTS, UNDERWATER, NETS, YOUTH, DELAWARE RIVER.

Subject Categories : Biology
      Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE