Amur ide ( Leuciscus waleckii ) lives in alkali-saline water (pH = 9.6) the Lake Dali and spawns freshwater rivers after migration annually. During spawning migrations, not only experience osmoregulation modification from to but also deal with energy prioritization for basal metabolism gonadal development. To achieve an optimal cost-benefit balance, a series of modifications are needed. This st...

In this study, three different age groups of male broodstocks (4, 5 and 6 years respectively) were used to fertilize eggs obtained from nine females. The results showed that 6 year old males had maximum body weight (1766 g), total length (56.3 cm) and sperm volume (31.83 ml). Results did not show significant difference in spermatocrit and spermatozoa concentration among age groups (p>0.05). Our...

Pacu (Piaractus mesopotamicus) is one of the most important Neotropical freshwater fish species produced by aquaculture in South America. This study first attempt to inquire about stocks Argentina regarding genetic diversity and structure. Neither characterization nor pedigree records are available for pacu farms Argentina. The presence hybrids both natural environment (Lower Paraná River) has ...

Aim The restoration of the extinct Adriatic population Beluga sturgeon, an iconic species with economic and traditional relevance, is a priority in upcoming conservation strategies but it must not occur without deep prior knowledge on current diversity distribution. We defined informed criteria for reintroduction Italian rivers by analysing its contemporary ancient based multi-markers approach....

In this study, three different age groups of male broodstocks (4, 5 and 6 years respectively) were used to fertilize eggs obtained from nine females. The results showed that 6 year old males had maximum body weight (1766 g), total length (56.3 cm) and sperm volume (31.83 ml). Results did not show significant difference in spermatocrit and spermatozoa concentration among age groups (p>0.05). Our...

A study was conducted to investigate the effects of dietary essential amino acid (EAA) concentrations on the spawning performance of Acanthopagrus latus. Broodstocks were fed with three replicates of isonitrogenous and isolipid formulated diets (diet 1, diet 2 and diet 3) with different concentrations of EAA (15.40, 16.88 and 18.14%, respectively) for 138 days. Results showed relative fecundity...