platina said: Translation complete. I think I'd put the title, 都会の野良の無残, as "No Mercy for Urban Strays".
Or "The Merciless of Urban Strays," since in almost every panel, the yukkuris are being merciless to their own kind.
Or, if one didn't mind adding a word that's possibly implied but not explicitly present in the original, "The Mercilessness of Urban Stray Life," which would includes both the mercilessness of the yukkuris and the mercilessness of their environment, both of which are illustrated in this series.
If animals have low chance of survival to adulthood, then they should have as many babies as possible
Look at frogs or turtles
Because they are already low with very few, having too many babies at the same time just makes survival lower. Their species survival is based more on their high reproduction rates in a constant way, not in having a looooooot of babies per pregnancy, basically a semi constant baby pumping in short periods of time than pumping a huge load of babies between loooooooong periods of time.
If animals have low chance of survival to adulthood, then they should have as many babies as possible
Look at frogs or turtles
Except that's what yukkuris already do? Have a shitton of offspring?
The difference here is that in case you didn't notice, frogs and turtles don't care for their young. Eggs hatch, turtle pops out, off it goes into the world.
With yukkuris, they care for and raise the young for a while. So "just have more babies, duh, winning!" doesn't work.
For urban stray yukkuris, culling is not an unusual act. In an environment that holds no regard for yukkuris' survival, proper child-rearing can hardly be done. Thus, parents who have conceived keep one of each type and squash the other weak stalk-babies. At the scene of a culling, all that can be heard are the sobs of the parents.