How do fishes reasonably calculate the number of eggs laid and specifications
Many people have seen fish spawning, but few people pay attention to the number of eggs spawned each time. The general feeling is that the number is large. In general, all the eggs are protected less, the loss is greater, the survival rate of juveniles is not high, and the number of eggs spawned is many; conversely, there are fewer spawning eggs with protective habits. Such as thorn fish only produce 80-100 grains; production of 200-300 grains; and wolfberry can produce 500,000 grains; grass carp produce 400,000 grains; wolfberry can produce 10 million grains. The reason why a large number of eggs are spawned is to increase the number of surviving offspring and spread the maternal gene as widely as possible.
In general, if the size of the egg is larger, the resultant pups are larger, so that the pups have higher viability. However, why do many fishes not concentrate their reproductive investment and try to produce large-sized eggs to ensure the survival rate of future generations?
The speculation and quantity of fish spawning is the process of generation and reproduction in generations, and the best mode has been summarized in the evolution of evolution. For organisms to spread their genes as widely as possible, for species with strong spawning ability, the size of the eggs will be too large and the number will be too small. Even if the survival rate of offspring is high, it is not worthwhile, but the size of the eggs If you are too young, the survival rate is too low to be worthwhile. Therefore, they must find an optimal solution between the size and number of eggs to ensure that the offspring have the largest number of survivors. This best-sized egg is most conducive to multi-breeding offspring and can also widely disseminate its genes.
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