A slightly more refined way of comparing the frequency distributions is to relate them to other, seasonally variable phenomena.
Size of clutch does not vary seasonally or geographically in the present sample.
The Arctic fox appears in all three columns, as the creature seems to fall into three races--a permanently white race, a permanently coloured race, and a seasonally dimorphic race.
Standfuss, the Graefin von Linden, and others have obtained like results in the case of other seasonally dimorphic butterflies.
Similar results have been obtained with the seasonally dimorphic Pieris napi.
International Labor Organization's estimated rate for international comparisons; Germany's Federal Employment Office estimated a seasonallyadjusted rate of 9.
Thus, in all seasonally dimorphic species we find that the caterpillars of butterflies which are often widely different in the colour and marking of their successive generations are absolutely identical.
Here again the case is quite similar to that of seasonally dimorphic butterflies.
Machaon and Podalirius, seasonallydimorphic in Spain and Italy, 74; P.
In the second place, the older phyletic form may not be abandoned while a newer form is being developed therefrom, but the former may alternate with the latter, as we see in the case of seasonally dimorphic butterflies.
A relatively small number of avian species have evolved to take advantage of this seasonally available food supply, and the ability to migrate to lower latitudes in winter is a characteristic of most arctic-nesting species.
The alluvial soil of the lowland plains, therefore, tends to be sterile in addition to receiving its precipitation seasonally and being poorly drained.
The percentage of adults in populations varied seasonally (Fig.
No correlation between any seasonally variable factor and the number of captures per individual was apparent.
Why all Polygoneutic Species are not Seasonally Dimorphic, p.
Caterpillars, pupæ and eggs of summer and winter generations of seasonally dimorphic butterflies alike, 64.
Of the truth of this proposition there can be no doubt, after what has been above stated concerning the difference between the two forms of any seasonally dimorphic species.
Vesta (Texas), both of which are seasonally dimorphic, and both apparently restricted in their winter broods to the form corresponding to B of Tharos.
A minute anatomical investigation of the sexual organs in the two broods of seasonallydimorphic insects would be of great interest, and might lead to important results.
A case of this kind, in which the winter form of a seasonally dimorphic butterfly occurs in other habitats as the only form, i.
Inasmuch as the reversion experiments with seasonally dimorphic butterflies appear to correspond with the latter view, I believe that this must be admitted.
It has been shown that the secondary forms of seasonally dimorphic butterflies do not all possess the tendency to revert in the same degree, but that this tendency rather varies with each individual.
In the same manner as inseasonally dimorphic species the summer and winter forms now alternate with each other every year, so would the forms produced by warmth and cold then alternate in the greater periods of the earth’s history.
From these we know that the eggs, caterpillars, and pupæ of all the seasonally dimorphic species experimented with are perfectly similar in the summer and winter generations, the imago stage only showing any difference.
The summer generations of seasonally dimorphic butterflies the more variable, 42.
The species has thus become seasonally dimorphic under the influence of the warm southern climate, although this is not the case in Germany where it also has two generations in the year.
In all seasonally dimorphic butterflies which I have been able to examine closely, I found the caterpillars of the summer and winter broods to be perfectly identical.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "seasonally" in a variety of sentences. We hope that you will now be able to make sentences using this word.
