Effects of Salinity Changes on Hematological Responses in Juvenile Ship Sturgeon Acipenser nudiventris

Abstract

A 10-day trial was conducted to evaluate the salinity tolerance and hematological responses of juvenile ship sturgeon Acipenser nudiventris under different salinity levels. A total of 240 fish averaging 6.2 ± 0.13 g (mean ± SD) were randomly distributed into 12 tanks in groups of 20, and each tank was then randomly assigned to one of three replicates of four different salinities at 0, 4, 8 and 12‰. At the end of 10 days of experimental period, plasma protein value of fish exposed to 0‰ and 4‰ salinities was significantly higher than those of fish exposed to 8‰ and 12‰ salinities (P < 0.05). Significantly higher values for plasma cortisol and glucose were obtained in fish exposed to 12‰ salinity compared to the fish exposed to 0‰ and 4‰ salinities (P < 0.05). Plasma potassium and sodium values increased significantly by increment of salinity levels (P < 0.05). Therefore, these results indicated that in natural environments, juvenile ship sturgeon, A. nudiventris in migratory populations could be able to migrate and adjust successfully into brackish water with a salinity of up to 8‰ without any short-term hematological stress responses.

Effect of salinity changes on growth, survival and biochemical parameters of freshwater fish Gibelion catla (Hamilton, 1822)

“…significantly (P<0.05) increased by 10.6% and 26.9% against 3 and 6 ppt indicated hyperglycaemic condition in catla fingerlings upon salinity stress. Hyperglycaemia in the fishes in response to salinity stress has been reported earlier (Sarma et al, 2013;Shahkar et al, 2015;Soltanian et al, 2016;Yan, 2017;Ghelichpour et al, 2018;Guo et al, 2020). It has been established that stress in fish can initiate neuro-hormonal stimulation resulting in an increase in corticosteroid and catecholamine secretions (Karsi and Yildiz, 2005).…”

Effects of different suboptimal dietary protein levels on growth, nutrient utilization and physio‐metabolic status of Anabas testudineus fingerlings in inland saline water

“…Further, in hyper‐saline condition, fish would loss water passively thus increasing the concentration of RBC and Hb value in blood (Plaut, 1998). However, subsequently on long‐term exposure the values return to normal by compensatory influx of water as a result of re‐establishment of the extracellular volume (Martínez‐Álvarez et al, 2005; Shahkar et al, 2015). Total protein constitutes of nutritive component that play important role in immune functions (Kumar et al, 2010).…”

A metabolic approach to understanding adaptation to sea water by endangered Persian sturgeon,Acipenser persicusfingerlings

“…Among energetic metabolites, only glucose evidently elevated after 24 hr salinity challenge, indicating increased energy requirements for osmoregulation. During osmotic acclimation of euryhaline fish species, the energy demand is usually fuelled through glycogenolysis induced by cortisol action and further elevation of plasma glucose (Arjona, Vargas‐Chacoff, Ruiz‐Jarabo, del Río & Mancera, ; Katuli, Amiri, Massarsky & Yelghi, ; Morgan & Iwama, ; Redding & Schreck, ; Sangiao‐Alvarellos et al., , ; Shahkar, Kim, Mohseni, Yun & Bai, ; Soengas, Sangiao‐Alvarellos, Laiz‐Carrión & Mancera, ). In a previous study on Persian sturgeon fingerlings (Hajirezaee, Mirvaghefi, Farahmand & Agh, ), the plasma cortisol levels increased clearly after 24 hr salinity challenge in BW, probably acknowledging the important role of this corticosteroid in promoting the liver glycogenolysis, subsequent releasing glucose into the blood and thus meeting the energy for hyperosmotic shock.…”