Fish eggs and larvae of the Chesapeake Bay: Observations on the problem of identifying field mortalities of striped bass (Morone saxatilis) larvae from preserved samples |
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| Authors: | Robert G Otto Jeffrey A Boggs |
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| Institution: | 1. R. G. Otto and Associates, 1040 North Calvert St., 21202, Baltimore, Maryland
2. Chesapeake Bay Institute, The Johns Hopkins University, 21218, Baltimore, Maryland
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| Abstract: | This study considered the rate at which striped bass larvae disintegrate following death as well as the ability of experienced taxonomists to distinguish larvae which were liver or dead on collection from preserved samples. The rate of disintegration was dependent on age (size) of the larvae with pro-larvae being unrecognizable in 8 to 16 h following death (17 to 19°C). Post-larvae decomposed somewhat more slowly, but were unrecognizable as to species after 16 h. Experienced taxonomists were unable to distinguish pro- and post-larvae which had been live or dead prior to preservation. However, the viability of metamorphosed larvae could readily be distinguished. |
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