東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Evolutionary trends in the individua...

Duke University.

Linked to FindBook

Google Book

Amazon

博客來

Evolutionary trends in the individuation and polymorphism of colonial marine invertebrates.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Evolutionary trends in the individuation and polymorphism of colonial marine invertebrates./
Author:	Venit, Edward Peter.
Description:	151 p.
Notes:	Adviser: Daniel W. McShea.
Contained By:	Dissertation Abstracts International68-03B.
Subject:	Biology, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3255600

Evolutionary trends in the individuation and polymorphism of colonial marine invertebrates.
Venit, Edward Peter.

Evolutionary trends in the individuation and polymorphism of colonial marine invertebrates. - 151 p.

Adviser: Daniel W. McShea.

Thesis (Ph.D.)--Duke University, 2007.

All life is organized hierarchically. Lower levels, such as cells and zooids, are nested within higher levels, such as multicellular organisms and colonial animals. The process by which a higher-level unit forms from the coalescence of lower-level units is known as "individuation". Individuation is defined by the strength of functional interdependencies among constituent lower-level units. Interdependency results from division of labor, which is evidenced in colonial metazoans as zooid polymorphism. As lower-level units specialize for certain tasks, they become increasing dependant on the rest of the collective to perform other tasks. In this way, the evolution of division of labor drives the process of individuation.Subjects--Topical Terms:

1018625
Biology, General.

Evolutionary trends in the individuation and polymorphism of colonial marine invertebrates.
LDR:02806nam 2200289 a 45 001 852649
005 20100630
008 100630s2007 ||||||||||||||||| ||eng d
035 $a (UMI)AAI3255600
035 $a AAI3255600
040 $a UMI $c UMI
100 1 $a Venit, Edward Peter. $3 1018624
245 1 0 $a Evolutionary trends in the individuation and polymorphism of colonial marine invertebrates.
300 $a 151 p.
500 $a Adviser: Daniel W. McShea.
500 $a Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1380.
502 $a Thesis (Ph.D.)--Duke University, 2007.
520 $a All life is organized hierarchically. Lower levels, such as cells and zooids, are nested within higher levels, such as multicellular organisms and colonial animals. The process by which a higher-level unit forms from the coalescence of lower-level units is known as "individuation". Individuation is defined by the strength of functional interdependencies among constituent lower-level units. Interdependency results from division of labor, which is evidenced in colonial metazoans as zooid polymorphism. As lower-level units specialize for certain tasks, they become increasing dependant on the rest of the collective to perform other tasks. In this way, the evolution of division of labor drives the process of individuation.
520 $a This study explores several ways in which polymorphism evolves in colonial marine invertebrates such as cnidarians, bryozoans, and urochordates. A previous study on the effect of environmental stability on polymorphism is revisted and reinterpreted. A method for quantifying colonial-level individuation by measuring the spatial arrangement of polymorphic zooids is proposed and demonstrated. Most significantly, a comparison across all colonial marine invertebrate taxa reveals that polymorphism only appears in those colonial taxa with moderately to strongly compartmentalized zooids. Weakly compartmentalized and fully compartmentalized taxa are universally monomorphic. This pattern is seen across all colonial marine invertebrate taxa and is interpreted as a "rule" governing the evolution of higher-level individuation in the major taxa of colonial marine invertebrates. The existence of one rule suggests that there may be others, including rules that transcend levels of biological hierarchy. The identification of such rules would strongly suggest that new levels in the hierarchy of life evolve by a universal pattern that is independent of the type of organism involved.
590 $a School code: 0066.
650 4 $a Biology, General. $3 1018625
650 4 $a Paleontology. $3 518862
650 4 $a Philosophy. $3 516511
690 $a 0306
690 $a 0418
690 $a 0422
710 2 $a Duke University. $3 569686
773 0 $t Dissertation Abstracts International $g 68-03B.
790 $a 0066
790 1 0 $a McShea, Daniel W., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3255600