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 condition that causes swelling and irritation of the upper airways â the voice box (larynx) and windpipe (trachea). Itâs caused by the same viruses that cause the common cold. Kids with croup have a âbarkyâ cough or hoarseness, especially when crying. Croup is most common in kids 6 months to 3 years old, but some older children also get croup. Most cases happen in the fall and early winter.