Download E-books Grzimek's Student Animal Life Resource: Corals, Jellyfish, Sponges and Other Simple Animals PDF

By Catherine Allen

Grzimek's pupil Animal existence source: Corals, Jellyfish, Sponges and different uncomplicated Animals bargains readers accomplished and easy-to-use details on Earth's animals. Entries are prepared via taxonomy, the technological know-how by which residing issues are categorized into comparable teams. each one access comprises sections on actual features; geographic diversity; habitat; nutrition; habit and replica; animals and other people; and conservation prestige. kinfolk entries are by way of a number of species debts and a variety map and picture or representation for every species. Entries finish with an inventory of books, periodicals, and sites that could be used for additional research.

This quantity of Grzimek's scholar Animal lifestyles source: Corals, Jellyfish, Sponges and different easy Animals features a pronunciation consultant for clinical names, a thesaurus, an summary of birds, an inventory of species within the set by way of biome, an inventory of species by way of geographic situation, and an index. the amount has approximately 2 hundred full-color maps, images, and illustrations to liven up the textual content, and sidebars supply extra evidence and comparable info.

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Just a couple of species have separate sexes. such a lot comb jellies liberate their eggs and sperm into the water. Fertilization (FUR-teh-lih-ZAYshun), or the becoming a member of of egg and sperm to begin improvement, occurs outdoors the physique. In a few species, even if, fertilization happens contained in the physique. just about all comb jellies fertilize (FUR-teh-lyze) themselves. The larvae swim freely in the course of their transformation into adults. COMB JELLIES and other people a few comb jellies are damaging to fish which are stuck and offered for meals. CONSERVATION prestige Comb jellies aren't threatened or endangered. sixty eight Grzimek’s pupil Animal existence source Venus’s girdle (Cestum veneris) SPECIES debts VENUS’S GIRDLE Cestum veneris actual features: Venus’s girdles are ribbon formed, attaining a size of just about five toes (1. five meters) yet a width of simply approximately three inches (8 centimeters). the brush rows are all on one facet of the ribbon, and the mouth is at the different part. Geographic variety: Venus’s girdles reside within the Atlantic and Pacific oceans, Antarctic waters, and the Mediterranean Sea. Habitat: Venus’s girdles stay within the floor waters of the ocean. nutrition: Venus’s girdles devour small crustaceans and mollusks. habit and copy: Venus’s girdles swim around the water three to six toes (1 to two meters) earlier than relocating up or down 2 to four inches (5 to ten centimeters) and reversing course. utilizing this habit, the Venus’s girdle retraces its unique course yet 2 to four inches (5 to ten centimeters) above or under it. A Venus’s girdle captures prey on tentacles mendacity over its physique, and the combs generate small whirlpools Comb Jellies sixty nine Venus’s girdles are ribbon formed, attaining a size of just about five toes (1. five meters) yet a width of merely approximately three inches (8 centimeters). the brush rows are all on one part of the ribbon, and the mouth is at the different facet. (Illustration by way of Joseph E. Trumpey. Reproduced via permission. ) that can raise prey circulate and catch because the Venus’s girdle strikes backward and forward throughout the water. Venus’s girdles have an get away habit that involves snakelike activities of the lengthy physique that permit the animal to maneuver numerous physique lengths in seconds. Venus’s girdles make either eggs and sperm, which they free up into the water for fertilization and improvement of larvae outdoors the physique. Venus’s girdles and folks: Venus’s girdles don't have any recognized value to humans. Conservation prestige: Venus’s girdles are usually not threatened or endangered. ■ 70 Grzimek’s pupil Animal existence source Sea walnut (Mnemiopsis leidyi) SEA WALNUT Mnemiopsis leidyi actual features: Sea walnuts succeed in a size of approximately four inches (10 centimeters). 4 deep furrows run from the pinnacle to backside of the animal. Geographic diversity: Sea walnuts dwell off the jap seashores of North and South the US and feature been brought into the Black Sea. Habitat: Sea walnuts reside in shallow waters close to shore and in bays and estuaries (EHS-chew-AIR-eez), the parts the place rivers meet the ocean. vitamin: Sea walnuts consume barnacle larvae, tiny crustaceans, fish eggs and larvae, and different animal plankton.

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