 | Prideaux John Selby, William Jardine - 1837 - 664 pagine
...of the species. He has seen one female, isolated, lay ten times successively — but in order to be within bounds, he supposes her to lay eight times...progenitor of 4,442,189,120 young ! ! The first mother lays forty eggs — which at the end of three months, at eight layings during that time, would give 320... | |
 | Thomas Milner - 1857 - 336 pagine
...watched the hatching and increase of one fresh-water species supposed, as a moderate estimate, the female to lay eight times within three months, and each time...have been the progenitor of 4,442,189,120 young. The Entomology of the kingdom embraces upwards of 10,000 species, which are known to naturalists, and have... | |
 | 1862 - 552 pagine
...Specimens of the Cyclops quadricornis are often found carrying thirty or forty eggs on each side (fig. 4) ; and though the other species, which have only one...progenitor of 4,442,189,120 young!! The first mother lays forty eggs, which at the end of three months, at eight layings during that time, would give 320 young.... | |
 | 1862 - 558 pagine
...considerable. Jurine has, with great fidelity, watched the hatching and increase of the Cyclops quadncontis in particular, and has given a calculation which shows...year, this female would have been the progenitor of 4,112,189,120 young!! The first mother lays forty eggs, which at the end of three months, at eight... | |
 | James Samuelson, Henry Lawson, William Sweetland Dallas - 1867 - 544 pagine
...ascertain the amazing fertility of the species. He supposes, to be within bounds, that the female lays eight times within three months, and each time only...would have been the progenitor of 4,442,189,120 young! To counterbalance this amazing fertility, they have many enemies ; and both young and old are devoured... | |
 | Thomas Milner - 1874 - 344 pagine
...watched the hatching and increase of one fresh-water species supposed, as a moderate estimate, the female to lay eight times within three months, and each time...have been the progenitor of 4,442,189,120 young. The Entomology of the kingdom embraces upwards of 10,000 species, which are known to naturalists, and have... | |
 | Ohio State Board of Agriculture - 1877 - 938 pagine
...has soeii one female isolated lay ten times successively ; but in order to speak within hounds, ho supposes her to lay eight times within three months,...forty eggs.' At the end of one year this female would be the progenitor of 4,442,189,120 young! The first mother lays forty egg-<, -which, at tho end of... | |
 | Mordecai Cubitt Cooke - 1880 - 282 pagine
...to speak within bounds he supposes her to lay eight times within three months, and each time only 40 eggs. At the end of one year this female would have been the progenitor of 4,442,189,120 young, that is near four-and-a-half thousands of millions. The first mother lays forty eggs, which at the... | |
 | Alfred Cheatham Stokes - 1918 - 344 pagine
...that made the calculation, supposes a single one to lay eight times only, and forty eggs each time. "At the end of one year this female would have been the progenitor of 4,442,189,120 young, that is, near four and a half thousands of millions." There are about thirty species of Cyclops. On... | |
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Cyclops quadricornis in particular, and has given a calculation which shows the amazing fertility of the species. He has seen one female isolated lay ten times successively ; but in order to speak within bounds he supposes her to lay eight times within... 