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The egg is found in the faeces, sputum, or urine of the definitive host. Depending on the species, it will either be non-embryonated (immature) or embryonated (ready to hatch). The eggs of all trematodes (except schistosomes) are operculated. Some eggs are eaten by the intermediate host (snail) or they are hatched in their habitat (water).
[8] [6] Egg predation includes both specialist egg predators such as some colubrid snakes and generalists such as foxes and badgers that opportunistically take eggs when they find them. [17] [18] [19] Some plants, like the pitcher plant, the Venus fly trap and the sundew, are carnivorous and consume insects. [12]
Phasmatodea eggs resemble seeds in shape and size and have hard shells. They have a lid-like structure called an operculum at the anterior pole, from which the nymph emerges during hatching. The eggs vary in the length of time before they hatch which varies from 13 to more than 70 days, with the average around 20 to 30 days. [15]
Young females will only produce one clutch of three to sixteen eggs, while a large female can produce up to four. [40] The eggs take approximately ten weeks to hatch and emerge near the end of summer. The young lizards grow quickly and are able to reproduce the next year. Unfavorable nesting conditions can cause females to retain their eggs ...
A female Anopheles minimus mosquito obtaining a blood meal from a human host to support its anautogenous reproduction.. In entomology, anautogeny is a reproductive strategy in which an adult female insect must eat a particular sort of meal (generally vertebrate blood) before laying eggs in order for her eggs to mature. [1]
Up to 30 eggs are laid, depending on the species. Terrestrial tardigrade eggs have drought-resistant shells. Aquatic species either glue their eggs to a substrate or leave them in a cast cuticle. The eggs hatch within 14 days, the hatchlings using their stylets to open their egg shells. [3]
Japanese researchers announced last year that healthy fertile mice had been born using eggs created from male mice's tail-tip cells. The male-derived eggs were fertilized with regular sperm, thus ...
This established that fish eggs could be pelagic, living in the open water column like other plankton. [4] Around the beginning of the twentieth century, research interest in ichthyoplankton became more general when it emerged that, if ichthyoplankton was sampled quantitatively , then the samples could indicate the relative size or abundance of ...