Blaptica dubia


Blaptica dubia, the Dubia roach, also known as the orange-spotted roach, Guyana spotted roach, or Argentinian wood roach, is a medium-sized species of cockroach which grows to around. They are sexually dimorphic; adult males have full wings covering their body, while females have only tiny wing stubs, their tegmina being around a fourth of their body length.
Adults are dark brown to black with somewhat lighter orange spot/stripe patterning sometimes visible only in bright light. Coloration does differ slightly with environment and diet from one colony to another.
Blaptica dubia are partially ovoviviparous, giving birth to live young after eggs hatch inside the female, and can give birth to 20 to 40 nymphs per month under favorable conditions.
The Dubia cockroach is found in Central and South America, beginning in Costa Rica. It is common from French Guiana and Brazil to Argentina and Southern Africa
Documented specimens have been found in Brazil, Argentina, and Uruguay.

Flight

While rarely known to fly, adult males have fully developed wings and pigmented musculature typical of cockroaches able to meet the rapid energy requirements of sustained flight. In laboratory test launches from a ramp 2.5 m high, adult male B. dubia were able to right their dorso-ventral position and rapidly deploy their wings to control and direct their descent; however, active powered flight did not maintain or increase their altitude. Adult females have only rudimentary forewings and lack the muscles required for flight, and showed no flight control in test launches.

Climbing

Neither adults nor juveniles can climb smooth, vertical surfaces, since they do not have a developed arolium. However, juveniles have been known to climb silicone surfaces, and the plastic sides of containers.

Habitat

Ideal temperature range is the higher end of a 24°C - 35°C range. They will not breed below 20°C. They will not molt successfully if the humidity is too low. Dubia roaches can tolerate lower humidity than many other roach species. This species of roach will also sequester more water in its body when well fed upon fruits and water will be released at times of stress.
In captivity, enclosure humidity is less important than a supply of high moisture foods, negating the need to mist the enclosure at all when compared to some other tropical pet insect species. Captive habitats should be kept clean and dry in order to have fecal droppings dry and not provide a medium for bacterial or fungal growth. Vertically stacked egg crates greatly help in this, as does good airflow.

Diet

The Dubia cockroach is a frugivore that prefers fruits and grains, shunning such high protein sources as meat or waste droppings from other animals. They particularly like semisweet vegetable matter. Appropriate feed for raising Dubia roaches includes: carrots, all manner of tropical fruits, apples, avocados, banana, cherries, pears, oranges, strawberries, fresh corn, tomatoes, and lettuce —many other leafy greens will be accepted, including herbs.. All grain-based dry cat/dog food, fish food, rodent pellets, crested gecko meal and bearded dragon food can also be used to supplement their diet.
They will also eat wheat bran and germ-based food products like assorted breads, non-sweetened breakfast cereals, and even softened pasta, although such diets must be augmented with edible vegetation and fruit of some sort to provide sufficient water.
High starch tubers like potatoes and yams are eaten with disdain and seemingly only for their water content.
Newborn nymph Dubia seem to depend on the adults waste for survival and hiding.
Too much protein in Dubia may create too much uric acid, causing gout and potentially death in a colony and animals that eat them..

Lifecycle

Blaptica dubia has become a popular feeder insect, particularly among tarantula, amphibian and reptile enthusiasts. Keeping or breeding the insect is made easier by their inability to jump or climb smooth surfaces, relatively slow movement, and rarity of flying. They are also quiet, unlike crickets, and tropical environmental requirements reduce the likelihood of establishment of escapees in colder, dryer climates. B. dubia can cause allergic reactions in humans, although they produce relatively little odor compared to many cockroaches.
A study found other cockroaches provided a high-protein, low fat nutrition composition similar to crickets, more so than mealworms or superworm larvae provide. The gut contents of the cockroach, depending on its diet, may provide essential nutrients unavailable from a cockroach with an empty gut. Vitamin and mineral content in studied cockroaches was well represented except for low calcium:phosphorus ratios typical in cockroaches, and relatively low vitamin A and E in captive cockroaches. Supplementation of these nutrients in feeder cockroaches may be advisable. A study of panther chameleons found vitamin A deficiency shortened life spans and reduced reproduction rates.
Canada and some US states do not allow importation by the general public of B. dubia, considered by some as an invasive species. A Florida man was arrested on felony charges in 2011 related to ordering 500 B. dubia over the internet using a doctored permit, typically issued to researchers.

Reproduction

B. dubia is an ovoviviparous species, generally giving birth to live young, and pregnancy in one study lasted 48–64 days, in a 26°C environment with alternating 12-hour light and dark photoperiods. It carries the ootheca, which holds about 20-35 eggs, until they are ready to hatch, or may drop it earlier under stress conditions. Adults live for up to 2 years, females slightly longer than males. Growth and reproduction rates are sensitive to environmental conditions, optimally 25–30°C and above 60% relative humidity.