The present study was planned to determine an optimum live-feeding protocol for angelfish larvae (Pterophyllum scalare). Larvae with initial weight of 0.10 mg, a length 4.5 mm, and depth 1 mm were reared on three different feeding regimens 30 days. All experimental larval groups fed Artemia nauplii from the end yolk-sac resorption. control treatment (Group I) maintained days 14-28, + dry feed 2...

effect of different photoperiodic regimes was evaluated on growth performance and survival rate of the beluga ( huso huso ) prelarvae and larvae. newly hatched prelarvae were stored in 5 round fiberglass 500‑l tank with different photoperiod (24l:00d, 18l:06d, 12l:12d, 06l:18 d, 00l:24d) till 50 days post hatch with three replicates. light intensity was 200 lux during the experiment. feeding wa...

A biologically guided isolation of secondary metabolites from Cousinia alata Schrenk wild plant growing in Akmola region, Kazakhstan, led to the bioactive diterpene grindelic acid (1). Six flavonoids were also isolated and identified as retusine (2), pachipodol (3), jaranol (4), penduletin (5), casticin (6), 5, 7, 3?-trihydroxy-3, 4?-dimethoxyflavone (7). Penduletin (5) showed moderate cytotoxi...

The brine shrimp Artemia (Crustacea, Branchiopoda) lives in hypersaline lakes distributed all around the world. It is widely used as live prey larviculture for many advantages, especially easy operation, adequate size and nutritional quality. Many sites have been exploited its cysts, demand from aquaculturists remains increasing. population of salina was reared at 5 different salinities (80, 10...

Abstract Macrobrachium macrobrachion is an African native brackish river prawn with a high commercial value. Currently, there little information on the post‐larval production of this species. Two experiments were conducted in laboratory to develop techniques for The first experiment analyzed duration yolk resorption and second described larval stages. Yolk was studied 240 newly hatched larvae 2...

background: achillea talagonica (asteraceae) is an endemic herbaceous plant in iran with small yellow flowers and several times pinnately divided leaves in worm shape. the plant was found to be cytotoxic in our previous studies.   materials and methods: a. talagonica was collected in may 2005 from talegan in north of iran during the full flowering stage. dried aerial parts of the plant were red...