Impingement Studies

  • Richard J. Horwitz
Part of the Lecture Notes on Coastal and Estuarine Studies book series (COASTAL, volume 23)

Abstract

The number of fishes collected from a nylon net placed in the screen wash discharge troughs at CCNPP Units 1 and 2 are tabulated by species. The most common species (90% of the total) found in the impingement samples were Anchoa mitchilli, Leiostomus xanthurus, Trinectes maculatus, Brevoortia tyrannus and Micropogonias undulatus. Although several of the same species were dominant in both impingement and trawl samples, the impingement samples contained greater numbers of species from habitats poorly sampled by trawling. A number of typically freshwater and estuarine species were captured in impingement samples but not in trawl samples.

Survival studies showed high survival rates among blue crabs, flounders, cyprinodontids, gobies and blennies. Herrings, anchovies and silversides typically showed intermediate rates of survival and perciforms showed variable but generally lower survival rates.

The impingement samples and survival estimates were used to estimate total impingment of fish and impingement mortality by CCNPP for the period 1975–1983. In general, impingement mortality was small relative to the mortality rates from commericai fishing.

Keywords

Nylon Fishing Paral Balt 

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© Springer-Verlag Berlin Heidelberg 1987

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  • Richard J. Horwitz

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