@article{article_286015, title={The Investigation on Reproduction Characteristics of Crayfish (Astacus leptodactylus Eschscholtz, 1823) in the Keban Dam Lake}, journal={Aquaculture Studies}, volume={17}, pages={125–136}, year={2017}, DOI={10.17693/yunusae.v17i27092.286015}, author={Demirol, Ferhat and Gündüz, Fatih and Yüksel, Fahrettin and Güler, Mehtap and Beri, Abdulmutalip and Yıldırım, Tacettin}, keywords={Crayfish,Astacus leptodactylus,Keban Dam Lake,reproduction biology}, abstract={<p class="MsoNormal" style="text-align:justify;line-height:150%;"> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">This study was carried out
to determine the reproduction characteristics of crayfish </span> <span lang="en-us" style="line-height:150%;" xml:lang="en-us"> <span style="font-size:14px;">( </span> <span style="font-size:14px;"> <i>Astacus
leptodactylus </i> </span> <span style="font-size:14px;"> <i> </i>Eschscholtz, 1823) living in the Keban Dam Lake. The research
was conducted with a total of 8745 crayfish collected during study. </span> </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">The minimum size of female carrying eggs on the pleopods was recorded as
77.05 mm total length and 10.46 g weight The mean number of eggs per unit
individual mean weight and </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">mean
diameter </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us"> of eggs as well as </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">mean number per unit live weight </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us"> were calculated as 129.73, 0.0133 </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">±0.000 g, 2.94±0.007 mm and 5.55±1.86 ind/g, respectively, in a total of
382. A linear relationship was found between total length, weight and </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">number of eggs. The strongest relationship appeared to be between the number
of eggs and live weight </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">( </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">F=14.268+4.89W, r=0.682). From the observations of hardened spermatophore
remainings around the seminal receptacle, it was understood that matings
started in the second week of January when water temperature was around 8.5 </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us"> <sup>o </sup> </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">C </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">. The pleopodal eggs appeared in the third week of January when water
temperature was still 8.5 </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us"> <sup>o </sup> </span> <span lang="en-us" style="line-height:150%;font-size:14px;" xml:lang="en-us">C. T </span> <span lang="en-us" style="line-height:150%;" xml:lang="en-us"> <span style="font-size:14px;">he hatchlings
emerged in the 4 </span> <span style="font-size:14px;">th </span> <span style="font-size:14px;"> week of May </span> </span> <span lang="en-us" style="line-height:150%;" xml:lang="en-us"> <span style="font-size:14px;">(-at 19.5 </span> <span style="font-size:14px;"> <sup>o </sup> </span> <span style="font-size:14px;">C) </span> </span> <span lang="en-us" style="line-height:150%;" xml:lang="en-us"> <span style="font-size:14px;"> and the juveniles leaved from spawners in the third week of June. </span> <font face="Times New Roman, serif"> <span style="font-size:12pt;"> </span> </font> </span> </p> <p> </p> <p> </p>}, number={2}, publisher={Su Ürünleri Merkez Araştırma Enstitüsü}