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Showing 1 to 20 of 34 for “"glochidia"”.
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Immunological responses of fishes to glochidia of freshwater mussels
… aspects of the interaction between fish and glochidia were studied using glochidia of the Alabama rainbow mussel (Villosa iris). Tested host species was the rock bass (Ambloplites rupestris) and non-host fishes were common carp (Cyprinus carpio) and goldfish (Carassius auratus). Ouchterlony …
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Acquired and Cross Immunity of Largemouth Bass (Micropterus Salmoides) to the Glochidia Larvae of Unionid Mussels
The glochidia larvae of freshwater mussels (family Unionidae) are temporary parasites of host fish, where they are contained within dermal cysts. The immune responses of largemouth bass (Micropterus salmoides) to glochidia of the broken rays mussel (Mapsilis reeveiana) were investigated to …
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Acute Toxicity of Ammonia and Copper to Mussel (Bivalvia: Unionidae) Glochidia Inside and Outside of Conglutinates
… each life stage to pollutants. Larval mussels (glochidia) are parasites on the gills or skin of fish. Glochidia of many species are released from the female mussel within aggregates of eggs (conglutinates) that act to attract a host. The host frees the glochidia and becomes infected when …
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Sensitivity of early life stages of freshwater mussels (Bivalvia: Unionidae) to copper
… threatened in the wild from copper exposure. Glochidia, while held within the marsupia of the adult, the released or isolated glochidia, the encysted glochidia, and the gravid mussel were tested. Little effect on glochidia was detected following 30- day artificial stream exposures of gravid …
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Life history of the endangered shiny pigtoe pearly mussel, Fusconaia edgariana, in the North Fork Holston River, Virginia
… velocities. Drift nets (130um mesh) indicated glochidia edgariana were released into the water column from 23 June to 18 August, 1981 and 24 June to 28 August, 1982. Of the 4,800 fish examined from June 1981 to June 1982, 1.5% carried shiny pigtoe glochidia. The telescope, common, warpaint, and …
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Partitioning along reproductive niche dimensions in sympatric New Zealand freshwater bivalve species
… species through contrasting use of larval (glochidia) host-fish infestation strategies and contrasting glochidia morphometry. Female E. aucklandica were found to produce conglutinates, mucus packages containing miniature glochidia thought to lure specific fish to them by resembling fish …
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Life history of the endangered fine-rayed pigtoe pearly mussel, Fusconaia cuneolus (Lea, 1840), in the Clinch River, Virginia
The periods of gravidity and glochidial release, required fish hosts, and age and growth characteristics of Fusconaia cuneolus were studied in the upper Clinch River, Virginia during 1986 and 1987. This summer brooder is gravid from mid-May through late July, releasing most glochidia in midJune. …
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Reproductive Biology of the Flat Floater Mussel, Anodonta Suborbiculata, Say, 1831 (Mollusca: Unionidae)
… mid-September and mid-October in 1995, and most glochidia were released before the end of February in both 1995 and 1996. Drop-off of most juveniles from fish hosts occurred between March 17 and April 18 in 1996. Natural glochidial cysts of A. suborbiculata were observed on the fins of gizzard …
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Host Specificity of Freshwater Mussels: a Critical Factor in Conservation
… fish transformed large proportions of attached glochidia, average transformation success was very low (<5%) in all 4 of the population pairings. There were no significant differences in transformation success among these pairings. The poor transformation of Gasconade glochidia on Gasconade …
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The Effects of Glochidiosis on Fish Respiration
… begin life as parasitic larvae, known as glochidia. These larvae are temporary parasites on the gills or skin of fish. Little is known of the pathological effects of glochidia on their hosts (glochidiosis). Thus, the existence of an evolutionary arms race between mussels and their hosts is …
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Life History Observations and Determination of Potential Host Fish Species for Chipola Slabshell, Elliptio chipolaensis
… Basin in the Florida panhandle. E. chipolaensis glochidia are released from the female in conglutinates The potential fish host species for Elliptio chipolaensis are the bluegill and redbreast sunfish. Sixty percent of the bluegill successfully transformed E. chipolaensis glochidia into juvenile …
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Approaches for assessing toxicity of selected contaminants to freshwater mussels (Bivalvia: Unionidae)
… species variability in the tolerances of glochidia was observed during acute laboratory bioassays as endpoints were between 8 - 43 ppb for Hg tests, 1.0 - 2.5 ppm for NaCl tests, and 70 - 260 ppb for chlorine (TRC) tests. Glochidia of several species had equal or greater sensitivities to …
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Life History of the Spectaclecase, Cumberlandia Monodonta Say, 1829 (Bivalvia, Unionoidea, Margaritiferidae)
… During 1999, females were gravid with mature glochidia from early April to late May. No evidence of biannual reproduction was observed. Fecundity was 5.0x10⁶ ± 2.38x10⁶ (1.9x10⁶ - 9.6x10⁶) glochidia [mean ± st. dev. (range), n = 8]. Males as young as 5 years produced gametes, and females as …
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Evaluation of immunological techniques for host fish identification, and cryopreservation of embryos for conserving rare freshwater mussels
Glochidia (larvae) of freshwater mussels are obligate parasites which attach to and become encysted in the gills or fins of host fish species. The immune responses of the host fish to the parasite affects the susceptibility of the fish to glochidia of different mussels. The immune response provides …
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Reproductive biology and comparative growth rates of selected species of freshwater mussels (Bivalvia: Unionidae) in the New and Greenbrier Rivers, Virginia and West Virginia
… cycle, length and timing of spawning and glochidial release periods, and age at sexual maturity were described for each species. Comparisons of growth rates of C. tuberculata subpopulations from the Greenbrier River and three locations downstream of Bluestone Dam on the New River in West …
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Estudo de Diplodon (Diplodon) multistriatus (Lea, 1831) encontrado no Estado do Rio de Janeiro, Brasil (Molluscca, Bivalvia, Hyriidae)
… the soft parts when relevant. The study of the glochidia was added.
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Life history of the endangered dwarf wedgemussel, Alasmidonta heterodon (Lea 1829) (Pelecypoda: Unionidae), in the Tar River, North Carolina and Aquia Creek, Virginia
… summer and becoming gravid in September with glochidia maturing in November. Drift net sampling at sites with this species in both rivers during spring and fall of 1991 and spring of 1992 yielded no A. heterodon glochidia, indicating poor or no reproduction at both sites in 1991. Laboratory …
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The Effect of Dieoffs of Asian Clams (Corbicula fluminea) on Native Freshwater Mussels (Unionidae)
… life stages to unionized ammonia, and mussel glochidia were the most sensitive (24-hr LC50 of 0.11 mg/L NH₃-N). Juvenile and adult mussels were similarly sensitivity, with average 96-hr LC50's of 0.49 and 0.52 mg/L NH₃-N, respectively. Adult C. fluminea were the least sensitive, having an …
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Distribution and life history of the endangered James Spinymussel, pieurobema collina (bivalvia: unionidae)
… were used to determine gravidity and glochidial release periods, fish host requirements, age class structure, growth characteristics, and juvenile survival. Stream surveys conducted at 243 sites in 20 counties revealed new populations of this species in three subdrainages (Catawba …
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Reproductive Biology of the Rabbitsfoot Mussel (Quadrula Cylindrica) (Say, 1817) in the Upper Arkansas River System, White River System and the Red River System
… brooded from mid June to late July. Spring River glochidia were significantly larger than Black River and Little River glochidia. Although each of these populations appears to be capable of utilizing hosts in the other localities, differences observed in morphology and reproductive timing indicate …
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