Importance of pond based carp polyculture as a popular technique for fish production in Bangladesh is well documented [1]. It has further potentials to improve the livelihood of the poor and marginal peoples [2]. Potentials of pond based fish production towards livelihood improvement are also explored well by Hossain et al. [3] for Barind area having characteristic soil-water qualities like low...

Excessive ammonia can cause the death of fish and eutrophication water environment, so detection is essential for environmental monitoring. In this study, a highly selective sensing strategy based on N, S co-doped carbon dots (N, S-CDs) was developed. The as-prepared S-CDs exhibited excellent photoluminescence properties fluorescent stability. demonstrated fluorescence quenched in presence wide...

(With Plate 2 and one Text-figure) Adrian & Buytendijk (1931) have recorded potential waves in respiratory rhythm from the isolated brainstem of the goldfish. The waves could continue for 1 hr. or more. During an investigation of the electrical activity of single cells in the central nervous system these results prompted us to explore with microelectrodes the medulla oblongata of fishes for uni...