乐生活Summary of the phenomenon of "multiple paternity of the same mother" in shark embryos: the highest is 93%, and the lowest is a single paternity.
Many species of sharks have such characteristics: embryos of the same female during the same reproductive period are developed by multiple male fertilization, and different embryo individuals often have different paternal lines.
However, this phenomenon is not absolute. That is to say, even in the same species, some offspring of female individuals appear to be multi-paternal, but some offspring of individual individuals are single-paternal. Multi-paternity is not an absolute problem of 0 and 1, but a probabilistic problem of percentages.
The following studies (Table 1, open to the public) list the multi-paternity phenomena of shark embryos. It is worth noting that for the same shark, the multi-paternity probabilities of different populations in different regions are also different. These studies were ranked from high to low according to the probability of multiple paternity in offspring of pregnant individuals.
These studies conclude that paternity is at the genetic level. Single paternity does not mean that a female will only mate with a male. It may also be that one male’s sperm is particularly competitive, leading other males to fail to fertilize despite mating.
