08-25-2011, 06:40 PM
Bigyfan,
I don't know where your math went fuzzy, but let's see if we can figure out how many fish you would have in 8 years, starting with one pair. If they get 6 of their offspring to grow to adulthood with each spawn. And if with all the luck in the world those 6 are 3 males and 3 females that pair up in their 2nd year of life. 1st year, one pair produces 3 pairs. 2nd year, one pair produces 3 additional pair. 3rd year, 4 pairs (that's the original plus the offspring from the first year) produce 12 pairs. 4th year, 7 pairs produce 21 pairs. 5th year, 19 pairs produce 57 pairs. 6th year, 40 pairs (that's the 19 pairs from the year before, plus the 21 pairs that are now old enough to spawn) produce 120 pairs. 7th year, 97 pairs (40 that were old enough last year, and 57 pairs that were spawned in the 5th year) produce 291 pairs of fish. In the 8th year, 217 pairs are now old enough to spawn (provided nothing happens to the adults) and produce 651 additional pairs. The total population would be 868 pairs, or 1,736 fish from the original pair. Provided they were able to produce 6 offspring that would reach adulthood and spawn in the next year and have the same spawning success year after year, age class after age class.
If it continued into the 9th year there would be 508 pairs that were old enough to spawn and if each pair produced 6 offspring that survived to adulthood there would be 1,528 additional pairs.
But it's probably a moot point, because the growing season is too short in Strawberry for Smallmouth bass to get through their 1st cold water period. The young would have to have enough body mass by October to survive without another meal until roughly mid May.
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I don't know where your math went fuzzy, but let's see if we can figure out how many fish you would have in 8 years, starting with one pair. If they get 6 of their offspring to grow to adulthood with each spawn. And if with all the luck in the world those 6 are 3 males and 3 females that pair up in their 2nd year of life. 1st year, one pair produces 3 pairs. 2nd year, one pair produces 3 additional pair. 3rd year, 4 pairs (that's the original plus the offspring from the first year) produce 12 pairs. 4th year, 7 pairs produce 21 pairs. 5th year, 19 pairs produce 57 pairs. 6th year, 40 pairs (that's the 19 pairs from the year before, plus the 21 pairs that are now old enough to spawn) produce 120 pairs. 7th year, 97 pairs (40 that were old enough last year, and 57 pairs that were spawned in the 5th year) produce 291 pairs of fish. In the 8th year, 217 pairs are now old enough to spawn (provided nothing happens to the adults) and produce 651 additional pairs. The total population would be 868 pairs, or 1,736 fish from the original pair. Provided they were able to produce 6 offspring that would reach adulthood and spawn in the next year and have the same spawning success year after year, age class after age class.
If it continued into the 9th year there would be 508 pairs that were old enough to spawn and if each pair produced 6 offspring that survived to adulthood there would be 1,528 additional pairs.
But it's probably a moot point, because the growing season is too short in Strawberry for Smallmouth bass to get through their 1st cold water period. The young would have to have enough body mass by October to survive without another meal until roughly mid May.
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