Comparison of immune defense and antioxidant capacity between broodstock and hybrid offspring of juvenile shrimp (Macrobrachium nipponense): Response to acute ammonia stress.

Ammonia is a major environmental pollutant in the aquatic system that poses a great threat to the health of shrimp. Macrobrachium nipponense, as one of the large-yield farmed shrimp, is facing germplasm degradation. Genetic improvement through hybridization is one of the effective methods to solve this problem.

Polystyrene nanoplastics decrease molting and induce oxidative stress in adult Macrobrachium nipponense.

The widespread occurrence and accumulation of plastic waste have been globally recognized as a critical issue. However, few researches have evaluated the adverse effects of nanoplastics to freshwater organisms. Thus, here, the effects of polystyrene nanoplastics (PS-NP) on the physiological changes (i.

Comparison of morphology and genetic diversity between broodstock and hybrid offspring of oriental river prawn, Macrobrachium nipponense based on morphological analysis and SNP markers.

Hybridization is an effective method for the genetic improvement of farmed species. In this study, three broodstock populations (Changjiang, CJ, Dongting, DT, and Dianshan, DS) of oriental river prawn, Macrobrachium nipponense were used, and DS was used as the female broodstock. Through three-line hybridization, two hybrid populations were finally obtained.

Possible genetic reproductive isolation between two tilapiine genera and species: Oreochromis niloticus and Sarotherodon melanotheron.

Successful crossbreeding between Oreochromis niloticus and Sarotherodon melanotheron to produce a commercial hybrid has been difficult. The karyotypes and isoenzyme of these two species and their reciprocal hybrids (O. niloticus female × S.

[cDNA cloning and tissue-differential expression of Na+/K+/2Cl(-)-cotransporter 1-alpha isoform in Sarotherodon melanotheron].

The gills are the major apparatus for osmoregulation in fish to acclimate the changes of salinities. Na+/K+/2Cl(-)cotransporter 1-alpha (NKCC1 alpha) is one of the key ion cotransporter locoalized in gill chloride cells which has been associated with the maintence of osmotic homeostasis. The transport process mediated by NKCC1 alpha is characterized by electroneutrality with a stoichiometry of 1Na:1K:2Cl.