Accession Number:

ADA214304

Title:

Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (Mid-Atlantic): Weakfish

Descriptive Note:

Biological rept.

Corporate Author:

NORTH CAROLINA DIV OF MARINE FISHERIES MOREHEAD CITY

Personal Author(s):

Report Date:

1989-08-01

Pagination or Media Count:

23.0

Abstract:

Species profiles are literature summaries of the taxonomy, morphology, range, life history, and environmental requirements of coastal aquatic species. They are designed to assist in environmental impact assessment. Weakfish are one of the most abundant fishes in the estuarine and nearshore waters of the Atlantic coast. Weakfish mature at age I throughout their range and spawning takes place in coastal and estuarine waters from March to September. Juveniles utilize the deeper areas within estuaries as nursery grounds, migrate from high to low salinity areas throughout the summer, return to high salinity areas in fall, and most leave the estuaries by late fall. Some may remain in estuarine and nearshore coastal waters in winter, particularly in southern areas. Adult weakfish migrate seasonally, north in spring and south in fall and between inshore and offshore waters. Growth rates, maximum size, and longevity of weakfish are higher at the northern end of the range. Weakfish are an important recreational and commercial species in the Mid-Atlantic. Weakfish feed predominantly on mysid shrimp and anchovies as juveniles, and on clupeids and anchovies as adults. Weakfish have been found over a temperature range of 9. 5 to 30.8 C. Juvenile weakfish have been found over a wider salinity range 0.1- 31.7 ppt than adults 6.6-32.3 ppt. Keywords Life cycles Food habits Cynoscion regalis. AW

Subject Categories:

  • Biology
  • Biological Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE