Somehow, intensive aquaculture seems to have avoided the close scrutiny of the economics of diminishing returns. The basic costs for low management catfish production, feed ($630; $0.14/lb) and fingerlings ($225; $0.15/fish), would be $855/acre.ow density, autumn stocking in combination with temperature-based feeding substantially increased channel catfish fingerling weight by the subesequent spring. The advanced spring fingerling size (0.19-lb) allowed production of a 1.45-lb food-fish (1343 fish/acre) in 180 days.
Overview. Croup or Acute Laryngotracheobronchitis (ALTB) is a viral infection of the throat (upper airway). The virus causes swelling of the voice box (larynx) and windpipe (trachea). The swelling narrows the airway and makes breathing hard.
Croup is a term used to describe a variety of respiratory inflammatory conditions that affect the upper respiratory tract, cause swelling, increased mucus production and is usually more common in children.iral croup is the most common type and is caused by viruses, such as adenoviruses (cold viruses) and influenza (flu) viruses. Viral croup (laryngotracheitis) and recurrent croup (spasmodic) are difficult to distinguish between clinically as both can be associated with viral infections and are similar in appearance.