The use of satellite imagery to find, count and monitor whales in remote hard access areas has shown some promise, but few studies have, as yet, provided substantial conservation outcomes. Recent have the ability very high-resolution satellites detect previously surveyed populations belugas narwhals Canada. Here we describe detection a large aggregation poorly population southern Kara Sea, Russ...

DNA methylation data facilitate the development of accurate molecular estimators chronological age or “epigenetic clocks.” We present a robust epigenetic clock for beluga whale, Delphinapterus leucas, developed an endangered population in Cook Inlet, Alaska, USA. used custom array to measure levels at 37,491 cytosine–guanine sites (CpGs) from skin samples dead whales (n = 67) whose ages were es...

Semen obtained from four Beluga males (Huso huso) was cryopreserved using extender; Tris-sucroseKCl (30mM Tris, 23.4mM sucrose, 0.25mM KCl, PH 8.0) supplemented with MeOH at concentration of 5%, 10% and 20%. Semen was diluted, respectively, with ratios of 1:0.5, 1:1 and 1:2 with extender and frozen in liquid nitrogen vapor.Frozen sperms after 30 and 60 days were excluded from freezing. Experime...

Recently, a standardization theorem has been proven for a variant of Plotkin’s callby-value lambda-calculus extended by means of two commutation rules (sigma-reductions): this result was based on a partitioning between head and internal reductions. We study the head normalization for this call-by-value calculus with sigma-reductions and we relate it to the weak evaluation of original Plotkin’s ...

in this research, acute toxicity (lc) of zinc oxide nanoparticle on beluga (huso huso) andcommon carp (cyprinus carpio) was studied. the experiment was conducted using theorganization for economic co-operation and development (no. 202) method. for bothspecies, 96hlc10 was determined to be more than 200 mg/l. to assess the effects of zinc oxidenanoparticles on blood factors, leukocyte index coun...

background: in recent years, many studies have been conducted on finding a suitable replacement for fish meal to supply the needs of aquaculture feed industry. objectives: the present study was performed to examine the effect of replacing fish meal and fish oil with plant sources on bacterial counts in intestinal contents and mucus and bacterial composition in beluga sturgeon. methods: beluga s...