Dispersal of larvae ofMargaritifera laevisby its host fish

Autor:	Fred Jopp, Akira Terui, Taku Kadoya, Izumi Washitani, Yusuke Miyazaki, Akira Yoshioka
Rok vydání:	2014
Předmět:	Larva geography animal structures geography.geographical_feature_category Ecology biology Obligate Host (biology) fungi Mussel Aquatic Science biology.organism_classification Freshwater pearl mussel Tributary Oncorhynchus Biological dispersal Ecology Evolution Behavior and Systematics
Zdroj:	Freshwater Science. 33:112-123
ISSN:	2161-9565 2161-9549
DOI:	10.1086/674577
Popis:	Local aggregations of unionoids (mussel beds) represent subpopulations constituting a riverine meta-population and are presumed to be linked by dispersal of parasitic mussel larvae (glochidia) on host fishes. We examined movement patterns of Masu Salmon (Oncorhynchus masou masou), the obligate host fish for the freshwater pearl mussel Margaritifera laevis, during the mussel’s parasitic period to determine the dispersal potential of glochidia via host fish in the Shubuto River system, Hokkaido, Japan. We conducted a mark–recapture study in a 650-m river section to describe the distance and directionality of host fish movement, and we used fyke net sampling to quantify the number of host fish moving from mainstem rivers to tributaries. Most individuals of Masu Salmon captured in the study were infected with glochidia of M. laevis. The displacement distance of infected fishes ranged from 37.5 m downstream to 512.5 m upstream (mean = 36.5 m upstream from marking location). The dispersal kernel based o...
Databáze:	OpenAIRE
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