@article{article_293155, title={Observations on the reproductive biology of Unio terminalis (Bivalvia: Unionidae)}, journal={Ege Journal of Fisheries and Aquatic Sciences}, volume={34}, pages={303–309}, year={2017}, DOI={10.12714/egejfas.2017.34.3.09}, author={Güler, Mehmet and Çoban, Deniz and Kırım, Birsen}, keywords={tatlı su midyesi,Çine Çayı,Unio terminalis,glochidia,Çine Çayı}, abstract={<div style="border-top:solid 1pt;border-left:none;border-bottom:solid 1pt;border-right:none;padding:1pt 0cm 1pt 0cm;"> <p class="MsoNormal" style="text-align:justify;border:none;padding:0cm;"> <span style="font-size:8pt;font-family:’Arial Narrow’, sans-serif;">In the present study some
observations were made on the reproductive biology of <i>Unio terminalis </i> (Bourguignat, 1852; Bivalvia: Unionidae) from River
Çine (Aydın, Turkey). Egg packages that are typically seen in the breeding <a> </a> <a>process </a>of freshwater mussels were laid by the adults in May and November at
21–25 Cº water temperature under the laboratory conditions. The egg packages
were contained eggs or/and <a> </a> <a>glochidia </a>. The mean egg diameter
was ~226 μm and no correlation was found with the broodstck size (R <sup>2 </sup><0.01).
At the same time larvae size did not differ with the broodstck size (p>0.1);
the mean height of the glochidia were ~186 μm. Density of the glochidia were
30±6 mm <sup>-2 </sup>. The openning closing movement of the glochidial valves
was observed; the fastest frequency was recorded as 1.2 sec <sup>-1 </sup> and
larvae were able to keep this frequency up to 15 seconds. But this frequency
was recorded as less than 1 movement per minute for many cases with live
glochidia. After releasing, <a> </a> <a>glochidia </a>were found only at the
gills of <i>Andinoacara </i> sp. among 3
different fish species. </span> <span lang="en-us" style="font-size:8pt;font-family:’Arial Narrow’, sans-serif;" xml:lang="en-us"> </span> </p> <p> </p> </div>}, number={3}, publisher={Ege Üniversitesi}