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The females choose mates. (Apex)
The scientist could conclude that the females choose mates.
females are larger than the males in many species. however in some like leopard geckos the males are larger and in others males and females are the same size.
do males and females have different abilities when eatimating size
The scientist could conclude that the females choose mates.
The females choose mates - apex
Perhaps, coupled with sexual selection. Take the elephant seal. The preference of females for large males to head the harems drove the evolution of larger and larger variance in the size of the males to the females and rather quickly.
the males compete to fertilize
There are 40 species of dolphins. They range in size from about 4 foot to 25 foot for orcas. It is impossible to determine the size without a specific species. However, as a rule, the females are a little smaller than the males.
Size: 2.5 to 3.2m long for males and the females are 2.4 to 3.4mWeight: 200 to 452kg for males, females weighs 225 to 591kg
Generally yes, as in most species females are more petite, however I have known some female guinea pigs that are larger in size.
Weights for adult African lions range between 150-250 kg for males and 120-182 kg for females. Females are much smaller than males both in size and weight. Head and body length of a full grown lion is 170-250 cm in males and 140-175 cm in females. Shoulder height is up to 4 ft in males and as low as 3 ft in females. The tail length is 90-105 cm in males and 70-100 cm in females.