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 common in children and is thought to be triggered after a viral infection. Croup causes swelling in the throat and windpipe (trachea) and causes hoarseness, a barking cough and noisy breathing.Croup usually gets better by itself but sometimes drugs are used to try and improve this condition.roup is an acute illness commonly seen in children up to six years of age but mostly by the age of two. It is triggered by viral infections causing upper airway obstruction with varying degrees of respiratory distress. Mostly, it is mild and transient and resolves with supportive care.