||Record of Daily Growth in Otoliths of Atlantic Silversides, 'Menidia menidia', from Field and Laboratory.
Barkman, R. C. ;
Bengtson, D. A. ;
||Rhode Island Univ., Kingston. Dept. of Food Science and Technology. ;Springfield Coll., MA. Dept. of Biology.;Environmental Research Lab., Narragansett, RI.
||EPA/600/J-87/499 ; ERLN-634
Marine fishes ;
Ocean temperature ;
Menidia menidia ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Otoliths were removed from field-collected silversides of age less than 3 months. Otolith diameter was highly correlated with total length of the fish. Daily growth ring counts for the species are known to be function of age rather than size, so widths for the daily growth rings provide a record of daily increases in length of the fish. Measurement of ring widths showed that weekly specific growth rate was greater than 70 percent at age 1 week, but declined to about 30 percent at age 1 month and about 15 percent at age 2 months. A laboratory experiment in which temperature was changed on a weekly basis demonstrated that environmental variables can affect the width of rings.