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Journal Article

Early Planktonic Larvae of the Blackcheek Tonguefish, Symphurus plagiusa (Pisces: Cynoglossidae), in the Lower Chesapeake Bay

John E. Olney and George C. Grant
Chesapeake Science
Vol. 17, No. 4 (Dec., 1976), pp. 229-237
DOI: 10.2307/1350510
Stable URL: https://www.jstor.org/stable/1350510
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Early Planktonic Larvae of the Blackcheek Tonguefish, Symphurus plagiusa (Pisces: Cynoglossidae), in the Lower Chesapeake Bay
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Abstract

One hundred ninety-four larvae of Symphurus plagiusa were taken in the lower Chesapeake Bay during a three-year zooplankton survey 1971-1974. Early larval stages (1.3-6.2 mm NL) are illustrated and described. Recently hatched larvae (1.3-2.8 mm NL) are distinguished by pigment patterns, gut configuration, and a fleshy occipital hump. Later larvae (2.8-6.2 mm NL) are identified by pigmentation, gut configuration and produced dorsal rays. Larvae were taken during July and/or August each year. Recently hatched larvae (1.3-2.9 mm NL) made up the majority of the catch and were most abundant in the deepest and most saline portions of the bay. Large estuaries may be more significant spawning areas for Symphurus plagiusa than previously reported. Evidence is presented that earlier descriptions of S. plagiusa larvae may be in error.

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