Kircher, E. A.. UWM Center for Great Lakes Studies REU, firstname.lastname@example.org
, . A.. ,
DETERMINATION OF THE EFFECTS OF POST DEATH CONDITION, PRESERVATION, AND AGE ON THE SHRINKAGE OF LARVAL YELLOW PERCH (PERCA FLAVESCENS)
Many studies have assessed performance of larval fish as a function of size; this has proved a useful measure. However, it has been demonstrated that larval fish shrink upon death and preservation, and, if this shrinkage is not considered it is possible to overestimate or underestimate the performance and condition of larvae. The amount of shrinkage due to the effects of post death condition, preservation, and age was determined in yellow perch larvae (Perca flavescens). Computer image analysis tools were used to determine the amount of shrinkage due to post death condition treatment by difference. Shrinkage occurred on both death and preservation. Significant main effects of post death condition and age were detected, but there was no detectable interaction between death and age (alpha 0.05). A rough estimate of shrinkage in larval yellow perch is 14% on preservation in liquid nitrogen and 5% on death. Because many studies assess performance of larval fish as a function of length, it is imperative to have an accurate measure of the fish. Therefore, it is necessary to take these shrinkage amounts into consideration when studying field-collected and lab-reared larvae so as not to overestimate or underestimate the performance or condition of larvae.
Day: Wednesday, Feb. 3
Location: Sweeney Center