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 swelling of the voice box larynx and windpipe trachea croup can be caused by allergies bacteria or inhaled irritants but it s usually the result of a virusmost of the time the culprit is the parainfluenza virus but other viruses respiratory syncytial virus rsv adenovirus influenza and measles for example can also trigger croupcroup is most common in children between the ages of 3 months and 5 years although a child can get croup at any ageost of the time the culprit is the parainfluenza virus but other viruses respiratory syncytial virus rsv adenovirus influenza and measles for example can also trigger croup croup is most common in children between the ages of 3 months and 5 years although a child can get croup at any age