
Energy-rich cockroach 'milk' may someday be transformed into a food
supplement worthy of human consumption, new research indicates.
Scientists have found that the Pacific Beetle Cockroach feeds its bug
babies a formula which is remarkably rich in protein, fat and sugar.
"Any liquid harvested from a cockroach is not true milk. At least not as
we think of it," said Becky Facer, director of school and educator
programs at Fernbank Museum of Natural History in Atlanta.
The insect liquid takes the form of protein crystals in the guts of baby cockroaches.
"The protein crystals are milk for the cockroach infant. It is important
for its growth and development," CNN quoted Leonard Chavas, one of the
scientists behind the research as saying.
He explained the crystals have a whopping three times the energy of an
equivalent mass of buffalo milk, about four times the equivalent of
cow's milk.
"The interest here was, what is it really made of?" said Chavas, one of
the authors of the research, published in July in the journal
International Union of Crystallography.
Chavas and his colleagues examined the species, also known as Diploptera
punctata, which is the only species of cockroach known to be
viviparous- able to bring forth live babies that have developed within
the mother's body, instead of the mother laying eggs to develop outside
her body.
Like other viviparous creatures, this species of roach nourishes its
growing embryos with a protein-rich liquid secreted by its brood sac-
the roach version of a uterus. Soon after the embryo ingests the liquid,
protein crystals develop within its midgut.
Chavas and his colleagues extracted one of these crystals to learn more
about it and its potential nutrition. Following tests and even genome
sequencing, they discovered it was a complete food.
"It is what one would need: protein, essential amino acids, lipids and
sugars," Chavas said, explaining that the energy content is so high that
it helps infants within this unique species grow much bigger than
cockroach babies of other species.
The crystals are currently extracted from the midgut of cockroach
embryos- perhaps not the most efficient way of feeding a growing world
population.
Ultimately, however, Chavas and his team are hoping to reverse
bioengineer cockroach milk, but first they need to understand the exact
biological and chemical mechanisms underlying the process.
"For now, we are trying to understand how to control this phenomena in a
much easier way, to bring it to mass production," Chavas said.
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