Inbreeding

Inbreeding – mating system is related (to some extent) animals. The practice of animal husbandry knows many consequences akin to breeding: progeny deformity, hypoplasia, reduced productivity, fertility, infertility, etc. To broaden your perception, visit Dell. The desire not to use inbreeding led to what many, even of excellent specimens sent to the slaughterhouse. But at different times of inbreeding used for breeding species, because along with undesirable consequences of this breeding came and outstanding individuals as a result of the maximum desirable consolidation of heredity. Examples of such breeding breeds: Charolais (beef cattle livestock), Romanov sheep and others suggest the use of close inbreeding. Akin to breeding does not increase the number of recessive alleles in the population, not allowing them to manifest itself by increasing the homozygosity.

Usually There are many recessive genes in the latent state (at least 11 to Celso-kohozyaystvennyh animals). Inbreeding, followed by selection, can increase phenotypic uniformity among animals. So related groups are formed, the family line. However, inbred animals are often pamper, whimsical to environmental conditions. Therefore, when selecting their pay attention to the strength of the constitution. Most geneticists explain inbreeding increases homozygosity of dominant (positive effect) and recessive (negative effect) genes.

In unrelated populations of the recessive genes hidden dominant allelic genes and did not appear. Also with increasing homozygosity harmful effects may occur due to overdominance (superiority of heterozygotes over homozygotes), because number of heterozygotes decreases. To a worsening of symptoms during inbreeding may have effects and epistasis (interaction neallelnyh genes). Inbreeding can cause a greater manifestation of homozygosity because of the impact, both positive and neutral genes. These hypotheses are once again talking about that the genetic nature of inbreeding is not fully understood. In the early stages of the breeding species akin to dilution was used frequently. Now mostly used moderate inbreeding. Most breeders in breeding flocks are increasingly used unrelated breeding (outbreeding). But the elimination of inbred groups of cattle and their subsequent mating with each other makes significant progress in animal husbandry. The site for the farmer.

Madagascar Hissing Cockroach

Gromphadorrhina portentosa (Madagascar hissing cockroach) – a very popular form of home contents. This is a large wingless cockroach is yellowish-brown in color, size, females 6-7 cm, males – 5-6 See especially this type – a dull hissing sound, which he produced by stimulation or mating dances. With a kind of adult males can be distinguished by growth on the dorsal shield in the form of two horns, which the females do not. The larvae are dark brown, almost black. These beetles have a special soft 'Pads' on their feet, allowing them to easily climb smooth surfaces and firmly hooked on them. Madagascar cockroaches – good fodder for the big spiders, as well as simply entertaining pets. Reproduction of these cockroaches viviparous, females can produce offspring once every 3-4 months for kids 10-50. Kids of about 1 cm long, at first white, then fade and become dark gray.

After the first molt, becoming dark brown color with spots. The cycle of 4-6 months. Older individuals live for about a year, for a total lifespan of about 1.5 years. Terrarium For a small colony of cockroaches around 30 pieces will need a terrarium about 20h30h40sm. Cockroaches bad climb on the glass, so you need to make a dense cover. Average ventilation, humidity around 70-75%, temperature 28-30 C. As the temperature decreases the cockroaches will be slower to breed.

As a substrate can be used sawdust, or trash (not coniferous trees), oak leaves, coconut crumb, hay. It is better to choose a substrate, which holds moisture well and does not mold. You also need to put an and to put pieces of bark for climbing and shelter. In the terrarium to hold water bottle (with wool, because kids can drown) and trough (low plastic or ceramic dish). Feeding These cockroaches are omnivorous. They can feed many fruits and vegetables, cereals, dried gamarusom and daphnia, as well as dry fodder. Should always be water in the public domain.