Because of drought, the number of fishes decreased sharply causing enormous economic losses to fishermen.
During current study, mercury concentrations in tested tissues of all the fishes decreased in order liver > gill > muscle (Fig. 2).
The number of the coliform bacteria in the seawater examined "without the tropical fishes" decreased from 900 to 1 mL−1 in 2 weeks, and COD decreased from 37.9 to 7.9 mg L−1.
The thrust forces increase but the power consumptions of the downstream fish decrease.
When incorporating assortative mating such that individuals with more similar phenotypes are more likely to mate with each other (Fig. 8), the fitness effects of maladapted cultured-origin fish decrease because less interbreeding between cultured-origin and wild-origin fish occurs.
The United Nations Foodd and Agricultural Organisation reports that the haul of Caspian kutum (mahi sefid), one of the most common fish, decreased from the 1950s to the 1990s from 1,250 tonnes per year to 210.
From 2014 to 2015, the operational hygiene inspection scores of milk and meat increased and of fish decreased.
Plasma lipids in CPF-exposed fish decreased, while plasma protein increased significantly with time increase (Figure 3).
Total species richness, density and biomass of fish, decreased at both sites over the 30-year period.
Moreover, fish density can affect the efficiency of feed utilization; as the number of fish stocked in a pond increases, the amount of feed available to each fish decreases ([Chang 1988]).
