Bivalve epibiont armor
- 出版日期：2004.
- 页数：1 v. :
- 第一责任说明：Donna Carlson Jones.
- 分类号：a555.1
- ISBN：0496043153(ebk.) :
MARC全文
02h0029508 20120619153857.0 cr un||||||||| 120619s2004 xx ||||f|||d||||||||eng | 3146505 0496043153(ebk.) : CNY371.35 NGL NGL NGL a555.1 Jones, Donna Carlson. Bivalve epibiont armor [electronic resource] : the evolution of an antipredatory strategy / Donna Carlson Jones. 2004. 1 v. : digital, PDF file. Adviser: Miller, Arnold I. Thesis (Ph.D.)--University of Cincinnati, 2004. Conventionally, spines on bivalves and other organisms are thought to serve an antipredatory function； however, this has been tested minimally for epifaunal bivalves, and completed research is contradictory. It is possible that spines do not serve an antipredatory function directly, but provide a substrate for epibionts, those organisms that encrust the outer surface of the bivalve's shell. Although potentially harmful, coverage by epibionts would benefit the bivalve by concealing it from potential predators. The first portion of this project examined the mechanical behavior of crushed spined and unspined shells of one epifaunal bivalve (Spondylus regius) in order to ascertain if spines increase the amount of work or force required to fail a shell, elucidating a potential protective function of the spines. A second study demonstrated that epibiont acquisition on various morphologies (including spined, ribbed and smooth varieties) of epifaunal bivalve shells is differential with respect to epibiont species richness and percent coverage. A third study examined the shell morphology of epifaunal bivalves to determine if any correlations exist between this and latitude (and theoretically with predation intensity). To further examine the evolution of interactions between bivalves and their predators with respect to spine development, data were compiled from museum specimens and the paleontological and ecological literature to document changes in bivalve ornamentation through time, water depth and habitat preference. In general, the results here presented indicate that spines and other shell ornamentations likely enhance epibiont coverage and possibly afford some direct physical protection against predators. However, the lack of clear progression in spine characteristics along purported predation gradients may also indicate that hypothesized predation gradients need to be reexamined. Bivalves, Fossil. Electronic dissertations. aeBook. aCN bNGL http://pqdt.bjzhongke.com.cn/Detail.aspx?pid=r29mKdq509g%3d NGL Bs1564 rCNY371.35 ; h1 bs1204