title: Sperm Viability Assessment over elapsing time maintained at 2 degrees C of orange mud crab, Scylla olivacea (Herbst, 1796).
abstract: The aim of this study was to evaluate how long the fresh sperm maintained at 2 degrees C would be utilized for fishery management. The study was conducted every 2 h to assess the sperm viability of orange mud crab Scylla olivacea. Evaluations were conducted as 3 treatments; T1, T2 and T3. In T1, the live specimens were sacrificed; for T2, only spermatophores were extracted and for T3 spermatophore extraction followed by homogenization to create a sperm suspension. All samples were stored with ice in an insulated box was keep fresh longer at 2 degrees C. The time '0' referred the immediate collection of sperm after the specimen was sacrificed. Spermatophore viability was determined using the sperm suspension by eosin-nigrosin staining method. Sperm viability for the fresh sample at time zero was 97.36 ± 0.53%. Viability of the sperm significantly decreased in the 2nd h in all treatments, T1 was 44.66 ± 0.54 to 4.2 ± 0.22% at 16 and 18th h, T2 was 36.56 ± 0.5 to 2.69 ± 0.06% at the 12 and 14th h and T3 was 33.69 ± 1.26 to 6.4 ± 0.29% at 8 and 10th h. In comparison, T1 showed significantly higher than other treatments (p < 0.05). Extremely low viability percentages were recorded in T3. This study also proved that the time elapse had significant impact on the percentage of viable sperm count.
authors.forename: M
authors.initials: M
authors.lastname: Ikhwanuddin
authors.forename: H
authors.initials: H
authors.lastname: Muhd-Farouk
authors.forename: A J
authors.initials: AJ
authors.lastname: Memon
authors.forename: W
authors.initials: W
authors.lastname: Wendy
authors.forename: A B
authors.initials: AB
authors.lastname: Abol-Munafi
mesh_terms: D000818:Animals; D017756:Aquaculture; D003080:Cold Temperature; D003445:Crustacea / Q000502:physiology*; D008297:Male; D013094:Spermatozoa / Q000502:physiology*