Byssus

(redirected from Byssal thread)
Also found in: Dictionary, Thesaurus, Medical.

Byssus

 

(1) An excretion of the byssal gland, found in the so-called feet of many bivalve mollusks. Immediately upon expulsion, byssus hardens and forms durable silky filaments by which mollusks fasten themselves to underwater objects. In antiquity a special cloth, vysson, was prepared from the byssus excreted by the large mollusk pinna.

(2) A roe disease of freshwater fish caused by certain fungi of the genera Saprolegnia and Achy la.

References in periodicals archive ?
New recruits (<5 mm) present in each cleared plot were counted, taking particular care to check the byssal threads.
Byssal thread production was also measured in juvenile mussels transplanted to high and low predation sites.
Mussel beds consist of one or more layers of individuals, attached to each other and to the substratum by a reticulum of byssal threads (Fig.
Salinity and sediment-mediated byssal thread production by Mytilus edulis Linnaeus and Geukensia demissa Dillwyn from New Jersey salt marshes.
Pearl oysters attach to substrates with proteinaceous byssal threads either temporarily, until their mass is sufficient to enable them to maintain position, or permanently throughout their lives.
Geukensia demissa always lives infaunally, and like the primitive endobyssate mussels, it relies on a longer shell to increase its stability in soft sediments, while byssal thread production is supplementary (Stanley, 1972).
The null hypothesis that variations in oxygen partial pressure had no effect on the rate of byssal thread production was tested.
For the adhesive to work as imagined, it would have to mimic the properties of the byssal threads.
The byssal threads are gooey when the mussel first makes them, but they harden in the water.
Mussels, before they end up on a seafood lover's plate, use fibers known as byssal threads to tether themselves (SN: 1/5/91, p.
The mussels generate fibers called byssal threads that protrude through the hinged area of their shells.
On day 0 the animals, which had been fasted for 2 weeks, were collected and all of their byssal threads were cut off.