Reproductive Cycle, Gametogenesis and Embryonic Development of Nitia Teretiuscula (Bivaliva: Unionidae), From the River Nile, at Sohag Governorate, Egypt

Soliman, Fathey E.; Moustafa, Alaa Y.; Ismail, Tarek G.; Mohamed, Olfat T.

doi:10.12816/0034713

Cited by 3 publications

(2 citation statements)

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“…Freshwater mussels are a diverse and ecologically important group of bivalves found in rivers, lakes, and streams around the world (Strayer, 2008). They are known for their unique life cycle, which involves a parasitic larval stage known as the glochidium; and for their ability to filter large quantities of water and improve its quality (Strayer, 2008;Soliman et al, 2016). They play a vital role in aquatic ecosystems as they help to maintain water quality by filtering out particles and organic matter, and by removing excess nutrients such as nitrogen and phosphorus ( Vaughn & Spooner, 2006;Strayer, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, conservation efforts are needed to protect them and their habitats ( Auld et al, 2013;Qu et al, 2018;Ferreira-Rodríguez et al, 2019;Abdelsaleheen, 2023). Unionids undergo significant changes in their shell morphology, as they grow from juveniles to adults, and these changes can be influenced by a range of environmental and genetic factors ( Rhoads & Pannella, 1970;Inoue et al, 2013;Guarneri et al, 2014;Soliman et al, 2019). For instance, in some bivalve species, the shape of the shell changes as the animal transitions from a larva to a sessile adult.…”

Section: Introductionmentioning

confidence: 99%

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Variations in shell morphology of freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae) from Lake Polvijärvi, Finland

Abdelsaleheen

2024

Journal of Environmental Studies

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Freshwater mussels play an important role in aquatic ecosystems and have been the subject of numerous ecological and taxonomical studies. The present study investigated the shell morphology of A. anatina and U. tumidus with focusing on the width-length, height-length, and width-height relationships in Lake Polvijärvi, Finland. Both species revealed distinct external shell morphologies, where A. anatina exhibited an elongated shell shape with a slightly curved dorsal margin and a smooth surface, while U. tumidus had a shorter and flat shell with a more swollen umbo region and a rough surface. The correlation analysis demonstrated strong positive relationships between width-length, height-length, and width-height variables for both species (R 2 ≥ 0.82). Linear regression models accurately described these relationships indicating that shell width and height increased consistently as shell length increased. Both of A. anatina and U. tumidus exhibited positive slopes in the width-length relationship suggesting a widening of shells with increasing length, however, A. anatina had a higher intercept than U. tumidus indicating a wider shell at a given length in comparison to U. tumidus. In the height-length relationship, both species showed positive relationships, but U. tumidus exhibited a steeper slope indicating a faster rate of increasing shell height with increasing length compared to A. anatina. These findings contribute to understand the patterns of shell morphology for both species; and the observed species-specific dependence have implications for their growth, proportions, ecological adaptations, and shedding light on their ecological niches and evolutionary dynamics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variations in shell morphology of freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae) from Lake Polvijärvi, Finland

Abdelsaleheen

2024

Journal of Environmental Studies

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Reproduction cycle, trematode parasitism and growth of freshwater mussel Anodonta anatina (Bivalvia: Unionidae)

Abdelsaleheen,

Taskinen,

Kekäläinen

et al. 2023

Hydrobiologia

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Anodonta anatina, a widely distributed Eurasian freshwater mussel, has dramatically declined and listed as endangered species in IUCN Red List in some parts of the Europe. To better understand its basic biology and possible sex-dependent effects of parasitism on reproduction, we investigated the reproductive traits, trematode parasitism and growth between November 2020 and October 2021. Our data from a Finnish population indicates male-biased sex ratio and the gonadal development lasting throughout the year with a bradytictic brooding pattern. Gonadosomatic index of both sexes peaked in May and declined in June. Mature oocytes were smaller sized than those of previously studied unionids, fecundity was fairly low, and the maximum predicted lifespan was 14 years. Gonads were infected with digenean trematode parasites, Rhipidocotyle campanula being the dominant species. Interestingly, trematode infection rate was higher in females than in males. In July, when the water temperature reached its annual maximum, the trematode prevalence also peaked, which was accompanied with 16% of mussels being sterile. The trematode parasitism was thus negatively associated with reproduction, that might become even more affected if parasitism increases along with the predicted climate warming, which should be considered in possible future conservation and aquaculture efforts of this species.

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Temperature dependence of SERCA activity in thermally acclimated freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae)

2022

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Reproductive Cycle, Gametogenesis and Embryonic Development of Nitia Teretiuscula (Bivaliva: Unionidae), From the River Nile, at Sohag Governorate, Egypt

Cited by 3 publications

References 0 publications

Variations in shell morphology of freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae) from Lake Polvijärvi, Finland

Variations in shell morphology of freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae) from Lake Polvijärvi, Finland

Reproduction cycle, trematode parasitism and growth of freshwater mussel Anodonta anatina (Bivalvia: Unionidae)

Temperature dependence of SERCA activity in thermally acclimated freshwater mussels Anodonta anatina and Unio tumidus (Bivalvia: Unionidae)

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