The phrase "population dip" is correct and usable in written English.
It can be used to describe a decrease in the number of individuals in a specific population, such as in demographics or wildlife studies.
Example: "The recent census revealed a significant population dip in the rural areas, raising concerns about local economies."
Alternatives: "population decline" or "drop in population."
However, there's no doubt that the tuna can be classified as overfished, based on its massive overall population dip.
The expected population dip of the coming few years poses a major problem for smaller, residential colleges with high tuition.
Squeezed budgets and more lenient policies – low crime rates softened voters and politicians – have seen the jail population dip since a 2009 peak.
In fact, a report came out earlier this year showing that Pacific bluefin tuna have seen a 96%% population dip over the years, due to commercial fishing across their migratory range.
But under Mayor Archer, the law was rewritten, and lowered the population requirement to 750,000 and left Detroit with the authority to increase taxes should its population dip.
Meanwhile Fremont's white population dipped.
Detroit's white population plunged 53percentt in the last decade, as the city's overall population dipped below one million for the first time in 80 years.
The black population dipped slightly, to 38 percent, while the percentage of non-Hispanic whites rose to 13 from 7 and the share of Asians doubled, to 6 percent.
While Wisconsin's sandhill crane population dipped to low levels in the 1930s, partly because of hunting, these cranes seem now to be flourishing.
B7 NATIONAL A11-14 Populationulation Dips For First Time in Decades The number of inmates in state prisons fell in the second half of last year, the first such decline since the nation's prison boom began in 1972, the Justice Department reported.
Among the 45,134 counted as residents in 2009, the proportion of whites held steady at 61 percent; the share of Asians nearly doubled, to 13 percent, and the Hispanic population dipped to 19 percent from 25.
