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Japanese beetle larva. Density-independent: Affect a population equally regardless of its density.Examples: [1] A winter freeze may kill a constant fraction of potato leafhoppers in a peanut field regardless of the total number of leafhoppers.
Estimates of the total number of insect species or those within specific orders are often highly variable. Globally, averages of these predictions estimate there are around 1.5 million beetle species and 5.5 million insect species, with around 1 million insect species currently found and described. [3]
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In its ancient usage, hypothesis referred to a summary of the plot of a classical drama.The English word hypothesis comes from the ancient Greek word ὑπόθεσις (hypothesis), whose literal or etymological sense is "putting or placing under" and hence in extended use has many other meanings including "supposition".
Jean-Baptiste de Lamarck, in his 1809 Philosophie Zoologique, treated the insects as one of nine invertebrate phyla. [23] In his 1817 Le Règne Animal , Georges Cuvier grouped all animals into four embranchements ("branches" with different body plans), one of which was the articulated animals, containing arthropods and annelids. [ 24 ]
Possibly the original butter-fly. [6] A male brimstone (Gonepteryx rhamni) in flight.The Oxford English Dictionary derives the word straightforwardly from Old English butorflēoge, butter-fly; similar names in Old Dutch and Old High German show that the name is ancient, but modern Dutch and German use different words (vlinder and Schmetterling) and the common name often varies substantially ...
Beetle collection at the Melbourne Museum, Australia. Insect collecting refers to the collection of insects and other arthropods for scientific study or as a hobby. [1] Most insects are small and the majority cannot be identified without the examination of minute morphological characters, so entomologists often make and maintain insect collections.
Artistic representation of the extinct Puerto Rican shrew. The richness of mammals in Puerto Rico, like many other islands, is low relative to mainland regions. The present-day native terrestrial mammal fauna of Puerto Rico is composed of only 13 species, all of which are bats. 18 marine mammals, including manatees, dolphins and whales, occur in Puerto Rican waters. [13]