Viability, by which are meant fecundity, longevity and vigour, was low in average.
Columella regarded the gains from the births as a sufficient motive for encouraging these unions, and thought that mothers should be rewarded for their fecundity; Varro, too, seems to have taken this view.
Such is their fecundity that it has been asserted that one female (probably of P. vestimenti) may in eight weeks produce five thousand descendants.
In the British Isles the 1 The name of the fishes of the genus Cyprinus is derived from the island of Cyprus, the ancient sanctuary of Venus; this name is supposed to have arisen from observations of the fecundity and vivacity of carp during the spawning period.
Two hundred discourses exist to prove his fecundity, while his versatility is shown by the fact that he could treat the same subject differently on half a dozen occasions.
That chinchillas have not under such circumstances become rare, if not extinct, is owing to their extraordinary fecundity, the female usually producing five or six young twice a year.
The marriage rates in quinquennial periods up to 1905 were 19.6, 18.6, 21.0, 19.8, 15.6, 18.6, 18.6, 18.6, 17.4 and 17.4; the ratio of marriages to the marriageable population was for males (above 16 years) 61.5, for females (above 14) 46.0; the fecundity of marriages seemed to have increased, being about twice as high for foreigners as for natives.
It is evident that had the fecundity of the American stock of 1790 been equal only to that of Belgium (the most fertile population of western Europe in the 19th century) then the additions of foreign elementg to the American people would have been, by I 900 in heavy preponderance over the original, mainly British., elements.
That great nim ural feature of Egypt, the Nile, was of course one of the gods; mer name was Hapi, and as a sign of his fecundity he had long and dulous breasts like a woman.
They had undermined the foundations of scientific certainty, and so far as the fecundity of contemporary science did not give them pause, were ready, notwithstanding the difference of their starting-point, to acquiesce in the formula as well as the temper of Pyrrhonism.
The larger beasts of prey are not met with, and little check is therefore put on the natural fecundity of the graminivorous species.
Then, again, the fecundity of women amongst western peoples is at its maximum between 18 and 25 36.
Reference may also be made to Matthews Duncan, Fecundity, Fertility and Sterility (ed.
Except Camoens, all these men, though disciples of Gil Vicente, are decidedly inferior to him in dramatic invention, fecundity and power of expression, and they were generally of humble social position.
(From Cheshire's Bees and Bee-keeping, Scientific and Practical.) the high-pressure system followed in modern bee-management, exhausts the period of her greatest fecundity in two years, so that queens are usually superseded after their second season has expired and egg-production gradually decreases.
By degrees the fecundity improved, and in about twenty years became equal to what it is in Europe.
The fecundity in the genus Lepas has struck many observers.
In 1831 Patrick Matthew, in the appendix to a book on naval timber and arboriculture, laid stress on the extreme fecundity of nature "who has in all the varieties of her offspring a prolific power much beyond (in many cases a thousandfold) what is necessary to fill up the vacancies caused by senile decay.