By Michael Hutchins
V. 1. decrease metazoans and lesser deuterostomes / Neil Schlager, editor -- v. 2. Protostomes / Neil Schlager, editor -- v. three. bugs / Neil Schlager, editor -- v. 4-5. Fishes I-II / Neil Schlager -- v. 6. Amphibians / Neil Schlager, editor -- Reptiles / Neil Schlager, editor -- v. 8-11. Birds I-IV / Donna Olendorf, venture editor -- v. 12-16. Mammals I-V -- v. 17. Cumulative index.; ''This is a revised and up-to-date variation of 1 of the main authoritative and complete resources at the world's animals. just like the 1st version written by means of famous zoologist Bernard Grzimek and released in 1972, the second one version covers every kind of animals in geographic components around the globe. It comprises high quality pictures and illustrations and a entire index to all volumes.''--''The best 20 Reference Titles of the Year,'' American Libraries, may perhaps 2004
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Additional info for Grzimek's Animal Life Encyclopedia. Lower Metazoans and Lesser Deuterostomes.
Some species may reproduce asexually by fragmentation. Phylum Echinodermata Starfishes, sea urchins, sea lillies, and their relatives are extremely diverse, and exhibit a variety of reproductive and development modes. In all, however, typical deuterostome development is the rule, beginning with radial cleavage. Larval forms are varied, and tend toward different forms in different classes. Both sexual and asexual reproduction occur within the phylum, but broadcast spawning and planktonic development are the most common patterns.
Haeckel, E. ” Quarterly Journal of Microscopical Science 14 (1866): 142–165, 223–247. Nielsen, C. Animal Evolution. Interrelationships of the Living Phyla. 2nd ed. New York: Oxford University Press, 2001. Tyler, S. ” In Interrelationships of the Platyhelminthes, edited by D. T. J. Littlewood and R. A. Bray. London: Taylor and Francis, 2001. , A. Ratto, A. Baroin, R. Perasso, K. G. Grell, and A. Adouette. ” EMBO 10 (1991): 499–503. Field, K. , et al. ” Science 239 (1988): 748–753. , and R. M. Kristensen.
One possible outcome of competition is the extinction of the less successful competitor. A niche can be subdivided into two or more small niches with minimal overlap, allowing competing organisms to share a resource. Examples of resource partitioning may be found on coral reefs. Small ecological niches can be occupied by similar species if the anatomy, feeding behavior, and territory of each species are only slightly different from those of another. The hydrozoans Hydractinia (retained gonophores), Stylactis (medusoids), and Podocoryne (medusae) have similar morphologies but different reproductive strategies, which allows them to occupy similar niches on the shells of hermit crabs.