Glossary of Hatchery terms
Glossary of Hatchery Feed Terms - M - P
M
Marumerizer β a sizing and shaping device that breaks extruded strands into small individual agglomerations and shapes them into spherical particles.
Microencapsulation β Liquids and particulate dietary components are enclosed within a coating, which helps prevent dissolving and leaching, but will release under specific environmental conditions.
Microextrusion Marumerization (MEM) β see Agglomeration
Microalgae β see Phytoplankton
Micro-ingredients β Vitamins, minerals, antibiotics, drugs, and other materials normally required in small amounts and measured in milligrams, micrograms or parts per million (ppm)
Mycotoxins β Toxins naturally produced by molds and fungi
Mysis β Pelagic larval stage of a crustacean intermediate between the protozoea (zoea) and postlarva stages.
N
Nauplius (pl. nauplii) β Earliest larval stage of a crustacean.
P
Particle-Assisted Rotational Agglomeration (PARA) β see Agglomeration
Pellet β Agglomerated feed formed by compacting and forcing it through die openings by a mechanical extrusion process.
Phytoplankton β Minute plants suspended in water with little or no capability of controlling their position in the water mass. The plant component of plankton. Frequently referred to as microalgae.
Plankton β Passively drifting or weakly swimming organisms, including many microscopic plants and animals.
Postlarva (pl. postlarvae) β Stage occurring after the larval stage, resembling the juvenile but still lacking certain characteristics. ForΒ crustaceans: the stage following metamorphosis from larva (zoea) to juvenile. In penaeid shrimp, this is commonly counted in days after appearance of postlarval features, e.g. PL12 indicates a postlarva that has lived 12 days since its metamorphosis from the zoea stage of development.
Prebiotics β Non-digestible food ingredients that stimulate the growth and/or activity of bacteria in the digestive system that have favorable effects on the intestinal flora.
Β
Probiotics β Live micro-organisms added to feed, which confer health benefits.
Protein efficiency ratio (PER) βΒ Ratio of live weight gain (in grams) over protein consumed (in grams). Production per unit of protein fed.
Protein utilization, (apparent) net (NPU)Β β The amount of nitrogen retained by the animals over the total nitrogen consumed.
Protein, biological value of (BV) β Percent digested protein retained by the animal, expressed as the percentage of food nitrogen utilized for growth and body maintenance; this involves digestion, absorption, utilization and excretion of nitrogen-bearing compounds, especially proteins.
Protein, crude β The nitrogen content in a feed or animal or plant tissue, multiplied by a factor, which is generally 6.25.
Proteins, single-cell- (SCP) β type of natural food used in hatcheries made of individual cells (unicellular organisms), such as yeasts and microalgae fed to brine shrimpΒ nauplii.
Protozoan (pl. protozoans) βΒ A member of the phylum Protozoa, composed of mostly microscopic animals made up of a single cell or a group of more or less identical cells, reproducing by fission and living chiefly in water; includes many parasitic forms.
Protozoea (pl. protozoeae) β Larval stages between the nauplius and mysis in crustaceans; usually have seven pairs of appendages.
Proximate analysis βΒ (Analysis of) moisture, lipid, protein, fibre, ash and (by difference) carbohydrate content of any animal or plant product or mixed substance such as a feed.