Short Communication: Effect of cryopreservation on ultrastructure and mitochondrial function of albino Pangasius catfish spermatozoa

Abstract

Abstract. Hasanah U, Binawanto, Alimuddin A, Boediono A, Kursini E. 2020. Short Communication: Effect of cryopreservation on ultrastructure and mitochondrial function of albino Pangasius catfish spermatozoa. Biodiversitas 21: 4524-4528. Cryopreservation techniques have been carried out on many endangered species and animals with unique characteristics. Successful cryopreservation techniques vary between species depending on various factors. The study used cryopreserved spermatozoa of the albino Pangasius catfish as samples. The cryopreserved spermatozoa were analyzed by its ultrastructure, functional mitochondria, and viability. The cryopreservation was performed using a combination of 10% methanol, skim milk, and fish ringer extender. A deep freezer is used for cryopreservation at -80 °C with a storage period of 14 days. Observations were made on fresh spermatozoa, post-equilibration spermatozoa, and frozen-thaw spermatozoa. This study found there were differences in ultrastructure and morphology in the three treatments. Fresh spermatozoa and post-equilibration spermatozoa appeared intact membrane, mitochondrial, and flagellar structures. In contrast, in frozen-thaw spermatozoa, there was damage to the cell membrane. The study showed different percentages of yields on functional mitochondria of fresh spermatozoa (98 ± 2%), spermatozoa post-equilibration (57 ± 7%), frozen-thaw spermatozoa (42 ± 3.21%). Cell viability showed that there were differences in viability of fresh spermatozoa and frozen-thaw (p <0.05), the results of fresh spermatozoa (92 ± 0.57%) spermatozoa post-equilibration (80 ± 3.51%), frozen-thaw spermatozoa (61 ± 2.30%).The study concluded that the spermatozoa cryopreservation affects the ultrastructure, mitochondrial function, and viability in albino Pangasius catfish spermatozoa.

Changes in oxidative stress and ultrastructure of the sperm of silver barb, Barbonymus gonionotus , related to cryopreservation using a dry shipper

“…The moderate to severe ultrastructural damage in the mitochondria observed in post‐thawed silver barb sperm was similar to that reported in cryopreserved sperm of Atlantic salmon, pejerrey, and mammals (Díaz et al, 2019; Gárriz & Miranda, 2013; Keskin et al, 2020). Mitochondrial ultrastructural damage affecting the reduction in mitochondrial membrane potential (MMP) would lead to a decrease in the ATP content and sperm motility of post‐thawed sperm (Hasanah et al, 2020). The disorganization, damage, and coiling of flagella in post‐thawed silver barb sperm observed in this study were similar to results in previous studies (Díaz et al, 2019; Gárriz & Miranda, 2013).…”