1.   Females are often limited further by the necessity to rear offspring by brooding or lactation.

2.   Thousands of pages have been filled with theories on how to rear your offspring.

3.   If this flourish happened to occur in bigger, better males, then females who chose them would probably rear more offspring.

4.   Staff biologists are uncertain if the fish would have bore young anyway, but the aquarists are harvesting and rearing the offspring just the same.

5.   Through a sharing of lactational duties, the females rear larger offspring more quickly than they do when nursing on their own.