Duckweed as organic fish food

Introduction

Duckweeds are the smallest flowering plants. They grow as small colonies of plants floating on the surfaces of quiet bodies of water. Growing vegetatively, their multiplication can be extremely rapid, given the proper conditions. These plants are almost all leaf, having essentially no stem tissue, and only one or a few, very fine roots. In nature, duckweeds serve as food for many species of fish and aquatic birds. They can tolerate and grow under a wide range of conditions, including on water polluted with high concentrations of bacteria and some agricultural wastes. These characteristics have brought the duckweeds to the attention of environmental engineers and agriculturists alike.

What is Organic Aquaculture?

Answer is:
 1. No Chemical
 2. Natural Feed
 3. Environmental Friendly


1. Chemical in Aquaculture Industry

In Aquaculture, fish healthy, high mortality, low growth rates issues has encourage farmers to use lots of antibiotics, hormones, drugs, and others dangerous chemical. For example, Tilapia farming always face unwanted breeding and at the end cause over density, in-nutrition, low growth rate that given massive loss to the farmers. To avoid this, they use testosterone hormone to reverse sex baby fish be all male. All male mean no unwanted breeding, fast and uniform growth rate. But this hormone very difficult to measure and no guarantee that it can't be over dos. So what is the affects to people. As we know, same hormone was use by almost woman which want to be a man in transgender industry. Our daughters, maybe no  more a good girl if   they ate this hormonic tilapia. An aquaculture also can be separate with anti biotic, formalin, OTC that sure will give side affects to human body. In this modern era, we must change this method to be more save, save to human, and save to our environmental. We are no longer in industrial age, come and wake up to make revolution in aquaculture industry.

 
2. Sustainable Organic Fish Feed

Fish feed is one of the most important factors in aquaculture production. It is widely anticipated that global aquaculture expansion will encounter an inevitable future shortfall of non-renewable resources such as fishmeal and fish oil, necessitating the exploration of alternative strategies for fish feeds. The principles of organic aquaculture encourage the development of feeds that do not deplete global fish stocks.  Fish discard and cut-offs may be potential alternative ingredients, but this conflicts with the Danish environmental regulations because of their high phosphorus content. Intuitively, partial substitution of fishmeal and fish oil by sustainable organic plant protein and oil sources seems a good alternative, since fish feed (including organic) contains more than 60 % fishmeal on a fat-free basis.  Protein content in organic vegetables The main focus is on the need for competitive, organically produced vegetables with a high protein content. As plant crops generally have a lower protein content than fishmeal, this also includes the possibility of concentrating the protein fraction of existing protein sources with a relevant amino acid profile compared to that of fishmeal. The plant crops pea, rape and lupine have been processed and the protein fractions elevated to 72 %, 37 % and 55 %, respectively. In comparison, fishmeal contains 70 – 72 % protein and regulations stipulate that the fishmeal used in aquaculture production should come from sustainable stocks. Experimental diets are produced based on optimized feed recipes. In contrast to conventional feed, synthetic amino acids are not allowed in the optimisation of the amino acid profile in organic fish feed.