Threats to the freshwater pearl mussel Margaritifera margaritifera L. in Central Europe

Bauer, G.

doi:10.1016/0006-3207(88)90056-0

Cited by 213 publications

(223 citation statements)

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“…Apparently, each species of larvae infects primarily on a specific site of the host: Lampsilis radiata siliquoidea infects the gills (Waller & Mitchell 1989), as well as Margaritifera margaritifera (Karna & Millemann 1978, Meyers et al 1980 and Unio spp. (Bauer 1987), while Anodonta oregonensis develops in the fins of the host (Moles 1983). The gills of our specimens were not infected, result which agrees with data from Bonetto and Ezcurra (1962) concerning A. trapesialis forbesianus infecting eleven different host fish species where gill infection was observed occasionally only.…”

supporting

confidence: 92%

The Histopathology of the Infection of Tilapia rendalli and Hypostomus regani (Osteichthyes) by Lasidium Larvae of Anodontites trapesialis (Mollusca, Bivalvia)

Silva-Souza

Eiras

2002

Mem. Inst. Oswaldo Cruz

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supporting

confidence: 92%

The Histopathology of the Infection of Tilapia rendalli and Hypostomus regani (Osteichthyes) by Lasidium Larvae of Anodontites trapesialis (Mollusca, Bivalvia)

Silva-Souza

Eiras

2002

Mem. Inst. Oswaldo Cruz

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“…Although previous studies have shown that attachment and metamorphosis of glochidia is more successful on native than on alien fishes (Bauer 1987;Rogers et al 2001;Wächtler et al 2001), successful transformation has sometimes been observed on alien host fishes (Hiscock 1951;Atkins 1979;Walker 1981;Widarto 1996;Watters 1997;Watters and O' Dee 1998;Strayer 2008). The alien G. holbrooki had a moderately high prevalence of infestation in the field and exhibited successful metamorphosis in the laboratory, a finding also observed for other hyriids of eastern Australia (Walker 1981;H.…”

Section: Discussionmentioning

confidence: 98%

Glochidia ecology in wild fish populations and laboratory determination of competent host fishes for an endemic freshwater mussel of south-western Australia

Klunzinger¹,

Beatty²,

Morgan³

et al. 2012

Aust. J. Zool.

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Abstract. Glochidia (parasitic larvae) of freshwater mussels generally require a fish as a host.Westralunio carteri Iredale, 1934 (Bivalvia: Hyriidae), the only freshwater mussel found in south-western Australia was listed as Vulnerable, but recently changed to Least Concern (International Union for the Conservation of Nature). Glochidia were found on four alien and seven native species of fish from 18 sites in the South West Coast Drainage Division. On alien fishes, prevalence of glochidia ranged from 0.0 to 39.5% and mean intensity (number of glochidia per infested fish) from 1.0 to 6.0, while on native fishes prevalence was 9.2-75.0% and intensity was 2.3-7.1. Glochidia infestation was greatest on benthic fishes, which may be a consequence of greater encounter rates, but other factors, such as host size, probably also influence glochidia prevalence and intensity. Glochidia were generally restricted to fins of infested fish, and rarely on gills or the body surface. In the laboratory, four native and one alien fish species were found to be competent hosts for their ability to produce juvenile W. carteri, but two alien fish species were not. The inability of some alien fishes to produce juvenile W. carteri could potentially reduce recruitment success in areas dominated by alien fishes.

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“…clogging) or chemical properties (e.g. Biochemical Oxygen Demand; Quinlan et al 2015b), it is clear that fines influence mussel survival and recruitment (Bauer 1988;Buddensiek et al 1993;Geist and Auerswald 2007;Tarr 2008). Thus, gathering information on the characteristics and dynamics of fine sediment (its grain size distribution, organic content, temporal patterns of storage and conveyance) is important to better assess the quality of riverbed habitat for aquatic organisms (Österling et al 2010;Quinlan et al 2015b).…”

Section: Introductionmentioning

confidence: 99%

Asynchronicity of fine sediment supply and its effects on transport and storage in a regulated river

et al. 2018

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Purpose A disconnected ephemeral tributary was reconnected to the regulated River Ehen (NW England) as part of a river restoration initiative, providing a renewed delivery of sediment to a highly stable and armoured channel. This paper (1) assesses spatial and temporal dynamics of suspended and stored sediments in the Ehen, (2) characterises the composition of stored sediment, (3) develops fine sediment budgets for downstream river reaches, and (4) assesses the controls on the storage of fine sediment in the riverbed. Materials and methods A 3-km study section in the upper part of the River Ehen was divided into two reaches. Suspended sediments were monitored at the downstream limits of each reach over a 2-year period. In-channel storage was measured in three morphological units within the upper reach, on 13 occasions over the same period. Samples were used to assess changes in volumes of stored fine sediment, as well as the grain sizes and organic content of the material. A time-lapse camera facing the confluence of the tributary was used to conceptualise different flow scenarios. These scenarios reflect the degree of synchronicity between flows in the main-stem and those in the tributary. Fine sediment budgets were developed for each reach to assess the relative contribution of different sources of sediment. Results and discussion The reconnection significantly affected suspended sediment loads in the Ehen. Bed storage increased twofold, with changes most evident in the slow-flowing morphological unit. Changes in the composition of stored sediment were less marked than changes in the quantity of material. Changes in bed storage were controlled by the degree of synchronicity between flows in the Ehen and those in the newly reconnected tributary. Results show that three generalised flow scenarios occur, with total asynchronicity between flows in the tributary and the Ehen being responsible for the main episodes of fine sediment deposition. Overall, the estimated sediment budgets provide insights into the importance of non-perennial sources of sediment in supply-limited systems such as the Ehen. Although bed storage values are within the range of those published for UK rivers, the increase observed since the reconnection, together with the persistence of a static pavement, highlights the ecologically critical conditions of the regulated main-stem River Ehen. Conclusions Intermittent sources control fine sediment transport dynamics in the upper River Ehen. In this regulated river, ongoing deposition associated with increased low-and medium-sized flow events exerts more of a control on bed storage than large but rare floods. Management actions to limit delivery of material from lateral sources could help prevent further deterioration of habitat conditions for biota sensitive to fine sediment. Given the ongoing adjustment in the newly reconnected tributary, continued monitoring is needed to capture further morphosedimentary response in the main-stem.

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Threats to the freshwater pearl mussel Margaritifera margaritifera L. in Central Europe

Cited by 213 publications

References 4 publications

The Histopathology of the Infection of Tilapia rendalli and Hypostomus regani (Osteichthyes) by Lasidium Larvae of Anodontites trapesialis (Mollusca, Bivalvia)

The Histopathology of the Infection of Tilapia rendalli and Hypostomus regani (Osteichthyes) by Lasidium Larvae of Anodontites trapesialis (Mollusca, Bivalvia)

Glochidia ecology in wild fish populations and laboratory determination of competent host fishes for an endemic freshwater mussel of south-western Australia

Asynchronicity of fine sediment supply and its effects on transport and storage in a regulated river

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