Vocalism Portion for a Couple

Exterior mag, Lordly 1995Vocalism Office for a DuetteThe biota and secret of monogamousnessBy David QuammenTwo challenging statistics late grabbed my tending. They worry that singular manakin of sociable deportment known as monogamousness. Around 92 percentage of all birdie species are monogamous--at least done a bingle reproduction mollify, i.e. for liveliness. Among mammalian species, it's 3 percentage. By my gawky arithmetical, that makes monogamousness Read more [...]
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Kick! An court to those of us golden adequate to suffer the amphetamine handwriting

Women Extraneous, Downfall 1998XOXOCunt! An court to those of us rosy decent to birth the speed giveBy Microphone GrudowskiEveryone has heard of nature's nigh ill-famed femmes fatales, the nigrify widow and the praying mantid. Their use of snarfing polish their men earlier, later, or flush during the act of coupler vicariously sates the darkest impulses of every lusty girl-next-door. But terminated the decades, our friends the wildlife biologists suffer Read more [...]
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Male homosexuality was a means of attracting females

12/12/2012 Scientists have found that the small tropical fish males increase their chances of mating, the females showing courtship of other fish. In this case, the floor does not have facilities for courting females values. The paper was published in the journal Biology Letters, and a summary of its results ScienceNow.Scientists working with the tropical fish Poecilia mexicana, which is a close relative of the well-known aquarium guppies. The authors noted that the small males, which usually look bad in the eyes of female sexual partners, are used to attract the attention of the opposite sex Read more [...]
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Shrew small

Status. Widespread, sometimes thin look. Distribution. Range covers a vast area of the taiga forest zone from Ireland to Yakutia, in the south - to the Tien Shan and Mongolia. N. on the north of the Volga is the border of the (Guryleva 1968, Frolov, 1986). Observed in a small shrew Prieruslanskoy steppes and in most other areas of the Saratov Volga (Oparin et al, 2000, 2005a). In the Penza region species is found in 14 districts (Ilyin et al, 2006), including those within the city of Penza (Zolin, 2005). Number. Accurate records are not available, because the standard bait traps in the warm Read more [...]
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Mosquito — Ag. (O.) kasachstanicus Guts.

View, described AV Gutsevich (1962) to collect from the vicinity of Ili. Distributed in areas pripoymennyh middle course. Or. Until 1966 its larvae were not known, making it difficult to subgeneric affiliation form. Field observations and laboratory experiments showed that this late spring monocyclic species. The first adults appear in late April - early May. Then their number increases progressively and remains high throughout June. Since early July, the number of individuals seen to decrease, and in the last days of this month, you can catch only a few, very shabby (age discrimination Read more [...]
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Hunting for deer

Roe --- one of the most beautiful animals in the deer family. Within the country it inhabits the forest and steppe zones, as well as places of Crimea and the Caucasus. No it only in the center of the European part of Russia, outside the southern boundary of the taiga, in the open steppes of the Ukraine, the Volga region and deserts. In recent years, deer from the Urals, Siberia, Baikal, the Far East is gradually moving to the south, and from the west - to the central regions of the country. Abroad deer inhabit the whole of Western and South-Eastern Europe, in Asia Minor, in the northwestern part Read more [...]
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Bream

Bream body high, laterally compressed, covered with thick, stubborn scales. His head was small, the mouth small, semi-inferior, retractable into a tube. The dorsal fin is high but short anal fin is twice the length of the spinal. Caudal fin with a low-cut and a long lower lobe. Colouring bream depends on habitat conditions. Lake bream, usually darker river. Overall body color is silver. Head, back and upper sides of the blackish-gray. The belly is white. The fins are gray. Colouring young bream lighter older individuals. Males during spawning covered whitish-yellowish bumps wedding attire, Read more [...]
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Yellow ground squirrel or gopher-sandstone — citellus fulvus lichtenstein. Reproduction and growth of young

Yellow gophers different subspecies differ in terms of puberty. As we pointed out (1955), in South Kazakhstan and Chu valley squirrels participate in reproduction after the first winter hibernation at the age of 11-12 months, and in the northern parts of the range - after the second hibernation. Smaller subspecies are more hasty than larger ones. It should, however, be noted that the number of participants in the semi-mature females breeding ground squirrels from the south-eastern part of the area does not exceed 9.5% (Kydyrbaev, 1959). In males, puberty occurs later, so they are involved in Read more [...]
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Yellow ground squirrel or gopher-sandstone — citellus fulvus lichtenstein. Sex and age composition of the population

It is first necessary to dwell on the sex ratio at birth, which we determined from the last stage of embryo development. Scan results 1633 embryos showed that among females predominate (53%). Predominance of females was also observed in the period of life strive to animals, but the sex ratio at older ages vary from year to year, depending on the habitat. In the end, young to hibernation, ie, obtained at the age of three months, the previous sex ratio - females predominate over males. At this time the animals lead an independent life. If a high percentage of deaths of male embryos can explain Read more [...]
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The birth of new nests

One day (That's fine, because it necessarily has to be warm and quiet) on the surface of each nest can be observed unusual movement. Ants scurrying around, gather in groups, though lively and urgent counsel about something very important, and many run on a blade of grass growing in the anthill. And out of the dark output appear large insects with broad transparent wings neatly folded along the back. This male and female ants. You can distinguish them by size: females much larger than males, but the latter are usually more numerous (though, in some ant it is quite the opposite - are emitted Read more [...]
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Bream

Bream body high, laterally compressed, covered with thick, stubborn scales. His head was small, the mouth small, semi-inferior, retractable into a tube. The dorsal fin is high but short anal fin is twice the length of the spinal. Caudal fin with a low-cut and a long lower lobe. Colouring bream depends on habitat conditions. Lake bream, usually darker river. Overall body color is silver. Head, back and upper sides of the blackish-gray. The belly is white. The fins are gray. Colouring young bream lighter older individuals. Males during spawning covered whitish-yellowish bumps wedding attire, Read more [...]
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Yellow ground squirrel or gopher-sandstone — citellus fulvus lichtenstein. Changes in the number

Significant factors limiting the number of yellow squirrel, consider the activity of birds (buzzards, buzzard, steppe eagle) and tetrapods (polecat, fox, Korsak, Wolf) predators, and the effect of ecto-and endoparasites and they spread diseases. In addition, the dynamics of the ground squirrel with a year only one crop will depend on the intensity of their reproduction - delay the onset of sexual maturity, litter size, and is particularly noticeable on the number of females participating in reproduction. The timing of sexual maturity of females are more prolific relatively minor forms of ground Read more [...]
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Tarantulas

In the USSR, 13 known species of the genus Licosa singoriensis. Tarantulas widespread. In the north of their range runs along the upper reaches of the Dnieper, Pripyat, Yenisei, Upper Tunguska, the Volga and Kama, and they inhabit the desert area of Central Asia and Kazakhstan (the big race) and the southern steppe zone of the European part of the USSR (small race). The eastern border of the tarantula is, apparently, in the territory of Mongolia and China, significantly deviating to the south and west - to Greece, Asia Minor and Egypt, the southern border - in North Africa and then, leaning to Read more [...]
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Karakurt

In the USSR there are two species of the genus Karakurt Latrodectus, found in the steppe and desert area of Central Asia, in the Crimea, the Caucasus, Ukraine, Moldova, the Lower Volga region, on the border with Iran and Afghanistan. 1 Fig. 5. Sexually mature females karakurt: left more than average, the right to starve.Externally, the male and female not similar. Male fewer females in size (0.4-0.7 cm). The female reaches a length of 1-2 cm of its intense black color, with one or two red-orange or yellowish, orange or reddish spots on the sides of the spider unit (Fig. 5). Cephalothorax Read more [...]
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Bat Forest

Status. Migratory, widely distributed species. Distribution. In the area includes all of South and Central Europe, spreading from the West of France to the Urals, the Caucasus, northern Iran, and inhabit the south-eastern Mediterranean. In Russia, many in the forest and forest-steppe regions of European, Middle and Southern Urals, North Caucasus and the Volga region N.. In the forest-steppe part of the Right Bank is one of the numerous and widespread species of bats. In the Volga gets on woodland valley. Volga, along the forested floodplains of small rivers and irrigation canals. Here the Read more [...]
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Fur-bearing animals in the livestock farms glavzverovoda

Apparently, increased livestock Glavzverovod profitable fur-bearing animals, skins which have demand in Soviet consumers (fox silver-black) or in the external market (mink, sable, arctic fox blue). Reducing the number of raccoon dogs was due to the high cost of cultivation, compared with the prices of their skins in the domestic and foreign markets and increasing the number of these animals in the USSR in the wild. Stable stage nutria because they are semi-breeding is mainly engaged in procurement organizations (Ministry of blanks and Central Council). In the first five years after the war Read more [...]
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Effect of brown sugar on the fertility and condition of offspring of white rats

Described below study was undertaken by us in connection with the communication R. Hayes and colleagues about the negative effects on the sucrose diet during pregnancy. According to these data, the rats receiving only one sucrose, the pregnancies in the same terms as in the control (normal diet), but the number of implantation sites was reduced, as in ovarioektomirovannyh females. Sucrose diet resulted in a complete loss of fruit, females are all still alive. Thus, the well-known effect was obtained much greater sensitivity of the fetus in relation to various damaging factors. AP Dyban found Read more [...]
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Reproduction deer

Roe - The most prolific species of the deer family. Adult females annually bring two kosulenka, vykarmlivaya their milk to almost 6 - 8 months of age, and leave only when preparing to become a mother again. Young animals have not yet reached 1.5 years, involved in the reproduction and the age of 2 years bring first offspring, usually consisting of one kosulenka. Is not so rarely recorded instances where old females bring three or four cubs. Observations at the zoo found that there are two European roe deer rut: sist essentially - in August and an additional - in December - January. In the Read more [...]
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The sex ratio and age of moose

Structure of the population of animals by sex and age largely determines its performance. Identify the best (optimal) sex and age ratios for specific areas - the main task of hunting. But in order to be able to manage these relationships, it is necessary to know not only the real-life range of biological constants, but also the factors that determine it, and the value of their variability for the life of animals. The ratio of male and female moose almost everywhere in the world is 1:1, that is, in the nature of an equal number of individual lives of both sexes. But this is only an average. Read more [...]
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Large, reddish or gopher — citellus major pallas. Sex and age composition of the population

According to VS Bazhanov (1948 6), during the rut on adult female, with two or three adult males, and at last year's records and males exhibiting sexual desire, the ratio is 1: 6-7. However, this ratio sex should not be taken as true, because during the rut males in search of females are highly active and mobile, so in this period of the catch they always take precedence over females. Ratio sex adult squirrels undergo sharp fluctuations during the spring-summer season, and is closely related to the physiological characteristics of the animals and their mobility. Within Kazakhstan adult Read more [...]
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