Larval Types, Courtship and Mating Behaviors, and the Costs Associated with Exclusive Male Parental Care in the Sea Spider Achelia Simplissima (Pycnogonida)

Show full item record

Title: Larval Types, Courtship and Mating Behaviors, and the Costs Associated with Exclusive Male Parental Care in the Sea Spider Achelia Simplissima (Pycnogonida)
Author: Burris, Zair P.
Abstract: In all species of pycnogonids (sea spiders) males care exclusively for the offspring, making this group essential for studies on sex roles, sexual selection, and the evolution of parental investment. Unfortunately, little is known about pycnogonid mating patterns, larval development, or the costs associated with parental care. The mating habits of both male and female Achelia simplissima were studied experimentally and reveal that both sexes routinely mate multiple times and have multiple mates. Parental males experience higher frequencies of predator attacks and epibionts and a lower rate of movement as compared with nonparental males. However, parental males are harder to dislodge than nonparental males and suffer no change in feeding frequency as a result of parental care. The external morphology of the first larval stage of Achelia simplissima was described using SEM photos and compared with other larval pycnogonids. Morphological characteristics suggest a "parasitic" mode of postembryonic development.
Description: x, 97 p. : ill. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.
URI: http://hdl.handle.net/1794/10818
Date: 2010-09


Files in this item

Files Size Format View
Burris_Zair_P_ms2010su.pdf 1.618Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record