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Parasite

Title:		"Mate locating and access behaviour of the parasitic pea crab, Nepinnotheres novaezelandiae, an important parasite of the mussel Perna canaliculus"
Author(s):		Trottier O; Jeffs AG;
Address:		"Leigh Marine Laboratory, Institute of Marine Science, University of Auckland, Warkworth 0941, New Zealand"
Journal Title:		Parasite
Year:		2015
Volume:		20150318
Issue:
Page Number:		13 -
DOI:		10.1051/parasite/2015013
ISSN/ISBN:		1776-1042 (Electronic) 1252-607X (Print) 1252-607X (Linking)
Abstract:		"Pea crabs are globally ubiquitous symbionts in the marine environment that cause serious economic impact in the aquaculture production of several major bivalve species. However, little is known about their host-parasite interactions, especially the mating behaviour of these parasites that could prove useful for controlling their infestation in aquaculture. In this study, the mate location behaviour of male New Zealand pea crabs, Nepinnotheres novaezelandiae (Filhol, 1885), was observed when dwelling in its preferred host, the commercially important green-lipped mussel, Perna canaliculus. Given the cryptic behaviour of the male crabs, a novel trapping system was developed to determine whether male crabs would exit their mussel hosts in response to an upstream female crab. The presence of receptive female crabs placed upstream successfully attracted 60% of male crabs from their host over 24 h. Observations of the nocturnal mate-finding behaviour of male crabs were made in darkness using infrared video recordings. Males spent on average 49 min on empty hosts and never left a mussel containing a female conspecific once found, spending 200 min on average to gain entry to the mussel. Male crabs were often observed stroking the mantle edge of the mussel whilst attempting to gain entry, successfully increasing mussel valve gape during entry from 3.7 to 5.5 mm. A pheromone-based mate location system is likely used by this crab to greatly reduce the risks associated with the location of females"
Keywords:		"Animals Body Size Brachyura/*physiology Female Host-Parasite Interactions Male Muscle Relaxation Perna/*parasitology/physiology Sex Attractants/physiology Sexual Behavior, Animal Video Recording;"
Notes:		"MedlineTrottier, Oliver Jeffs, Andrew G eng Research Support, Non-U.S. Gov't France 2015/03/20 Parasite. 2015; 22:13. doi: 10.1051/parasite/2015013. Epub 2015 Mar 18"