Aspects of a mating aggregation of the spider crab, Libinia emarginata

Rubicon Research Repository/Manakin Repository

Aspects of a mating aggregation of the spider crab, Libinia emarginata

Show full item record


Title: Aspects of a mating aggregation of the spider crab, Libinia emarginata
Author: DeGoursey, RE; Auster, PJ
Abstract: The spider crab, Libinia emarginata, undertakes small scale seasonal movements from preferred overwintering areas to breeding sites each spring. SCUBA observations were made of a mating assemblage at a shallow site in Fishers Island Sound, Connecticut, USA. The assemblage occurred in an area of approximately 5000m2 with an estimated density of I crab/m2 . Sex-specific size class data revealed: 1) mature females become ovigerous in proportion to their size distribution in the total population, 2) there is no correlation between male and female size in paired crabs, 3) paired males were significantly larger than the overall male population, and 4) paired females were not significantly larger than the overall female population. Observations of behavioral sequences such as agonistic bouts between males and male-female obstetrical behavior confirm most previous laboratory observations. Other species of majid crabs (e.g. Chionecetes sp., Loxorhynchus sp.) also demonstrate gregarious behavior similar to L. emarginata. Crab aggregations may functionally serve as a protective mechanism during critical (vulnerable) periods of growth and reproduction.
Description: American Academy of Underwater Sciences (http://www.aaus.org/)
URI: http://archive.rubicon-foundation.org/10126
Date: 1989

Files in this item

Files Size Format View
AAUS_1989_10.pdf 4.398Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record

Browse

My Account