15. Glochidial Success Rate of Lampsilis siliquoidea based on Density

Emilee Urichich Thomas More College, Jonathan Frommeyer Thomas More College
Faculty Sponsor(s): Christopher Lorentz Thomas More College
Freshwater mussels have a unique life cycle in that they require a fish hosts to receive their nutrients during their larval stage. The larval form, called glochidia, are released into the water by modes such as dispersal or the use of a lure to attract fish for direct contact onto fish gills. This study attempts to determine whether glochidial density on fish gills affects juvenile success rates. Largemouth bass (n=8) were used as a fish host for Lampsilis siliquoidea. Glochidia were flushed onto the gills for attachment via hypodermic needle and left for three weeks. Four fish were high density with two gills flushed with glochidia and four fish were low density with only one gill flushed with glochidia. Detritus of tank was siphoned and flushed through a 100 and 200 micrometer sieve and counted under microscope in a 1cm by 1cm square of 1 mL of water. Results concluded significantly more glochidia on higher density fish than low density fish. Repeated experiments should be conducted to confirm if glochidia density affects juvenile success rate or if other environmental factors have a greater impact on the outcome.
Biology
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Irwin Library 3rd Floor