Reproduction in the animal world does not always follow a fixed script. In several species, individuals shift their ...

Quite an advantage in today’s world.

Animal reproduction and breeding encompasses the full spectrum of natural, assisted and genetic processes that underpin the perpetuation, improvement and conservation of species across diverse taxa.

Biologists like to say that reproduction is the ultimate investment, a costly gamble that shapes everything from lifespan to ...

OZARK, Mo. — An endangered Ozark hellbender raised by the Saint Louis Zoo has successfully reproduced within the Current River. This is a significant milestone in the recovery efforts of the species, ...

A new study shows there is a high cost of parenthood, quantifying the 10% “longevity tax” on reproduction. Consequently, mammals that have fewer or no offspring tend to live longer. But why does ...

For some animals, reproduction comes at the ultimate cost—their own lives. While this may seem extreme, it's a natural strategy to maximize reproductive success. These species invest everything into ...

New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

Animals possess circadian clocks, or 24 h oscillators, to regulate daily behavior. These typically take their cues from the periodic change of sunlight and darkness. However, many animals are also ...