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 common infection that causes swelling in the trachea (windpipe) and larynx (voice box). Croup occurs in children six months to 12 years of age. It is most common in children one to three years of age. Because croup is caused by a virus, it can spread to other children through coughing and sneezing. The virus also is spread by dirty hands, shared toys, and shared drinking glasses or spoons and forks.