Sentence examples for fish excreta from inspiring English sources
This nutrient was a result of decomposition of fish excreta and uneaten food.
Three-fourths of the aquarium's water with fish excreta was siphoned every day before feeding and replaced by an equal volume of well-aerated tap water.
Three-quarters of the water in each aquarium were siphoned every day to remove fish excreta and replaced by well-aerated water provided from a storage fiberglass tank.
Fish excreta with a half of the water in each aquarium were siphoned every day and replaced by dechlorinated tap-water containing the same Zn concentration.
"You get all these fish depositing excreta and unconsumed feed down to the bottom of the pond, where there is barely any oxygen, making it the perfect environment for methane production," a potent greenhouse gas, Poore said.
These species resemble P. piscicida Steidinger & Burkholder and also have a) strong attraction to fresh fish tissues and excreta, b) toxic activity stimulated by live fish, and c) production of toxin that can cause fish death and disease.
TOX-A Pfiesteria spp. showed strong behavioral attraction to fresh fish mucus and excreta in short-term trials, with intermediate attraction of TOX-B zoospores and relatively low attraction of NON-IND cultures when normalized for cell density.
Data were provided from tests of the hypothesis that Pfiesteriastrains differ in response to fresh fish mucus and excreta, algal prey, and inorganic nutrient (N, P) enrichment, depending on functional type or toxicity status.
It is very important to promote good hygiene in all stages of handling and processing excreta-raised fish to minimize potential bacterial and viral contamination.
Mara and Cairncross (1989) report yields up to 3 tons/ha/yr while Edwards (1985) found that yields of finfish in excreta-loaded fish pond systems in the tropics should be at least 5 6 tons/ha/yr, and with good management could be as high as 10 12 tons/ha/yr.
The use of untreated excreta to fertilize fish ponds is becoming less common in many parts of the world, and in China excreta are now used only after storage for four weeks in closed containers.
