TY  - JOUR
T1  - Effects of various stocking densities on hatching and survival rates of sea cucumber Holothuria tubulosa eggs (Gmelin, 1788)
TT  - Farklı stok yoğunluklarının deniz hıyarı Holothuria tubulosa (Gmelin, 1788) yumurtalarının açılma ve yaşama oranlarına etkileri
AU  - Günay, Deniz
AU  - Tolon, Mustafa Tolga
AU  - Emiroğlu, Dilek
PY  - 2018
DA  - December
DO  - 10.12714/egejfas.2018.35.4.03
JF  - Ege Journal of Fisheries and Aquatic Sciences
JO  - EgeJFAS
PB  - Ege Üniversitesi
WT  - DergiPark
SN  - 2148-3140
SP  - 381
EP  - 386
VL  - 35
IS  - 4
LA  - en
AB  - In this study, it was aimed to determine the opening and survival rates of Holothuria tubulosa eggs at four different stocking densities (1,5,15,30 eggs / ml) and to determine the effect of stocking density on egg size and larval size in different stages. Fertilized Holothuria tubulosa eggs were stocked in cylindrical conical collectors with a capacity of 30 l. Eggs were counted under light microscope at fertilization, early gastrulation, late gastrulation and hatching stages. It was found that there is an inverse relationship between stock intensity and opening rate (r = -0.848; p<0.001). The lowest hatching and survival rate was determined in 30 eggs / ml group (p <0.05). However, different stocking densities did not affect the diameter of the egg in different embryological stages (p> 0.05) and the length of early auricularia larva at 65 h (p> 0.05). As a result, the optimal stocking density for the highest hatching and survival rates of the fertilized eggs of Holothuria tubulosa was determined as 1-5 eggs / ml.
KW  - Fertilized egg
KW  - hatching rate
KW  - Holothuria tubulosa
KW  - sea cucumber
KW  - stocking density
KW  - survival
N2  - Bu çalışmada, Holothuria tubulosayumurtalarının, dört farklı stok yoğunluğunda (1,5,15,30 yumurta/ml) açılma veyaşama oranlarını belirlemek ve aynı zamanda stok yoğunluğunun farklıevrelerdeki yumurta çapına ve larval boyutuna etkisini ortaya koymakamaçlanmıştır. Döllenmiş Holothuria tubulosa yumurtaları, 30 l hacimli silindirkonik kollektörlere stoklanmıştır. Yumurtalar; döllenme anında, erkengastrulasyon, geç gastrulasyon ve yumurtadan çıkma aşamasında mikroskop altındasayılmıştır. Stok yoğunluğu ile açılma oranı arasında ters ilişki olduğubulunmuştur (r = -0.848; p<0.001). En düşük açılma ve yaşama oranı 30yumurta/ml stoklandığı deneme grubundasaptanmıştır (p<0.05). Ancak farklı stok yoğunlukları farklı embriyolojiksafhalardaki yumurtanın çapını (p>0.05) ve 65. saatteki erken auricularialarvasının boyunu (p>0.05) etkilememiştir. Sonuç olarak, Holothuriatubulosa’nın döllenmiş yumurtalarının en yüksek açılma ve yaşama oranları içinoptimum stoklama yoğunluğu 1-5 yumurta / ml olmuştur.
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UR  - https://doi.org/10.12714/egejfas.2018.35.4.03
L1  - https://dergipark.org.tr/tr/download/article-file/608476
ER  -