Morphological Indexes and Otolith Microstructure of Atlantic Croaker, Micropogonias-Undulatus, As Indicators of Habitat Quality Along An Estuarine Pollution Gradient

Date

1993 Jan

Authors

Burke JS
Peters DS
Hanson PJ

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Abstract

Atlantic croaker, Micropogonias undulatus, sampled from a transect along a pollution gradient show a trend of declining growth and physical condition. This trend is apparent in the mean size of 0-group croaker, in their recent growth rate measured by marginal otolith increment widths, in longer term growth rate as indicated by relative otolith weights, and in general physical condition as measured by an index of condition of the caudal fin. We suggest that these measures are indicators of stress associated with environmental conditions. Because croaker from different positions along the pollution gradient were distinguishable, it appears that they remain for extended periods within areas of degraded environmental quality

Description

25-33

Keywords

FISH GROWTH, OTOLITH INCREMENT WIDTH, OTOLITH WEIGHT, FIN EROSION, GALVESTON BAY, GROWTH, AGE, LARVAE, FISH

Citation