Since 1995, research cruise catches of anchovy Engraulis encrasicolus (Pisces: Engraulidae) have increased in the Irish Sea. Their distribution shows distinct seasonality with anchovy being found in the deeper waters of the western Irish Sea in the spring and spreading out into the eastern Irish Sea by summer and autumn. Their length distributions show two modes at 7–11 cm and 13–16 cm.
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Armstrong et al. (1999) studied this question.
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