Margaritifera margaritifera
Conservation management of the freshwater pearl mussel : Margaritifera margaritifera Part 1, Biology of the species and its present situation in Ireland
... Finally, Margaritifera margaritifera is large (up to 140mm), with an oval-shaped heavy black shell often eroded at the umbone (apex) (Figure ...M. margaritifera, but a closer look at the shells’ ...
35
The sources and dynamics of fine-grained sediment degrading the Freshwater Pearl Mussel (Margaritifera margaritifera) beds of the River Torridge, Devon, UK
... The Freshwater Pearl Mussel (Margaritifera margaritifera) is an endangered organism across its entire range. It has a complex life cycle and stringent habitat requirements and is therefore an indicator ...
15
Margaritifera margaritifera : stage 1 and stage 2 survey guidelines
... mussel, Margaritifera margaritifera, is a scheduled species under the Wildlife Act and is also listed in the appendices to the Habitats & Species Directive ...M. margaritifera and ...
26
Ontogeny of juvenile freshwater pearl mussels, Margaritifera margaritifera (Bivalvia: Margaritiferidae)
... The gills of juvenile freshwater bivalves undergo a complex morphogenesis that may correlate with changes in feeding ecology, but ontogenic studies on juvenile mussels are rare. Scanning electron microscopy was used to ...
21
Effects of substrate size and cleaning regime on growth and survival of captive-bred juvenile freshwater pearl mussels, Margaritifera margaritifera (Linnaeus, 1758)
... Effects of substrate size and cleaning regime on growth and survival of captive-bred juvenile freshwater pearl mussels, Margaritifera margaritifera (Linnaeus, 1758).. 2nd Internation[r] ...
25
Effects of substrate size and cleaning regime on growth and survival of captive-bred juvenile freshwater pearl mussels, Margaritifera margaritifera (Linnaeus, 1758)
... Freshwater molluscs are among the most endangered invertebrates in the world (Machordom et al., 2003; Primack, 2006) and are disproportionately imperilled compared with other groups (Williams et al., 1993). ...
32
Conservation management of the freshwater pearl mussel : Margaritifera margaritifera Part 2, Water quality requirements
... The comparison of nutrient levels over time was made to try to further predict nutrient needs of Margaritifera. The water quality data is limited in (i) only a small number of samples were taken (2 to 18 snapshot ...
44
acid—base Regulation in the Freshwater Pearl Mussel Margaritifera Margaritifera: Effects of Emersion and Low Water pH
... Immersion of air-exposed mussels in acidified water pH5-25 resulted in a significant acidosis of mantle fluids, relative to the initial time zero value Fig.. Because of the large differe[r] ...
12
Density and abundance of the Freshwater Pearl Mussel, Margaritifera margaritifera , in the Kennebecasis River, New Brunswick and evidence of recent recruitment
... Hastie et al. 2000b and references cited therein). the presence of M. margaritifera is often reported to be associated with low water depth (Gittings et al. 1998; Morales et al. 2004). However, the mean summer ...
7
Non Marine Molluscs
... Some species are rare in Ireland as they are at the edge of their range or climatic tolerances (e.g. Pomatias elegans). For species that are declining in Ireland there are multiple drivers of population loss. Species ...
53
Lough Corrib SAC 000297
... Title : Monitoring populations of the freshwater pearl mussel Margaritifera margaritifera – 2011 condition assessment survey of the freshwater pearl mussel in the Owenriff River, County [r] ...
71
Altered thermoregulation as a driver of host behaviour in glochidia parasitised fish
... Parasites alter their host behaviour and vice versa as a result of mutual adaptations in the evolutionary arms race. One of these adaptations involves changes in host thermoregulation, which has the potential to harm the ...
9
Improving the quality of cultured round pearls produced by Pinctada margaritifera in Fiji (Linnaeus, 1758)
... P. margaritifera (Chapter 2) but around 18-24 months is required to produce pearls with a commercially acceptable nacre thickness (Haws, 2002; Taylor and Strack, ...
200
Swept away: ocean currents and seascape features influence genetic structure across the 18,000 Km Indo-Pacific distribution of a marine invertebrate, the black-lip pearl oyster Pinctada margaritifera
... P. margaritifera [35], and therefore it is possible that the true species distribution limit may not have been sam- pled, if it in fact extends beyond the current known ...
21
Genome-wide comparisons reveal evidence for a species complex in the black-lip pearl oyster Pinctada margaritifera (Bivalvia: Pteriidae)
... P. margaritifera and ...P. margaritifera clade, all individuals of ...P. margaritifera also formed a distinct monophyletic group, which was basal to the larger monophyletic clade resolved for all ...
13
Effects of body size on suspension feeding and energy budgets of the pearl oysters Pinctada margaritifera and P. maxima
... School of Biological Sciences, James Cook University, Townsville, Queensland 481 1, Australia 'Australian Institute of Marine Science, PMB 3, Townsville MC, Queensland 4810, Australia AB[r] ...
12
Evaluation of selected substrates for collection of hatchery reared black-lip pearl oyster (Pinctada margaritifera) spat
... An experiment was conducted to investigate the effect of collector materials and position on Pinctada margaritifera spat attachment. Settlement on polyethylene pipes (54.6%) was significantly higher (P < 0.05) ...
10
Productivity And Economic Values Of The Pearl Oyster (Pinctada Margaritifera Var Erythraensis) Cultured In Dongonab Bay, Red Sea
... Pinctada margaritifera var erythraensis which is found along most of the Sudanese Red Sea ...Pinctada margaritifera var erythraensis such as Mortality (Nasr, 1982), feeding and growth (Nasr, 1984), hatchery ...
10
Polycyclic aromatic hydrocarbons contaminants in Black-lip (Pearl) Oyster Pinctada margaritifera from Kish Island (Persian Gulf)
... (Pinctada margaritifera ) were collected in summer (July) 2004 from six coastal locations in Kish Island (Persian Gulf) and were analyzed at the analytical laboratory of Great Lakes Institute for Environmental ...
10
A parallel population genomic and hydrodynamic approach to fishery management of highly-dispersive marine invertebrates: the case of the Fijian Black-Lip Pearl Oyster Pinctada margaritifera
... Pinctada margaritifera (Pteriidae) displays substantial genetic fragmentation, despite being a broadcast-spawner with an extended PLD of 26–30 days ...P. margaritifera is a valuable industry and sub- ...
26