Ecology of bivalves

Gosling, Elizabeth

doi:10.1002/9781119045212.ch3

Cited by 6 publications

(1 citation statement)

References 283 publications

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“…. Extreme low water temperatures, specifically cold spells, can significantly affect the various levels of biological organization in bivalves, leading to declines or cessation of vital activities (Gosling, 2015). Moreover, in aquaculture and natural waters, extreme cold spells can even cause substantial mortality among bivalve populations (Ferreira et al, 2021).…”

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Surviving the cold: a review of the effects of cold spells on bivalves and mitigation measures

Masanja

Yang

et al. 2023

Front. Mar. Sci.

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Cold spells, characterized by prolonged periods of low temperature, have become increasingly frequent, intense, and prolonged due to the ongoing effects of climate change, resulting in devastating consequences for marine ecosystems and significant socio-economic impacts. As ectothermic organisms, bivalves are dependent on their environment for regulating body temperature, and thus, cold spells can disrupt their normal functioning, leading to mass mortalities. This review comprehensively summarizes the effects of cold spells on bivalves and proposes mitigation measures to be considered in future bivalve farming and management plans. Scientific evidence has indicated that cold spells can alter bivalve metabolism, leading to an increase in stress protein production and a decrease in the activity of energy metabolism-related enzymes, which can negatively impact the bivalve immune system and increase the risk of disease. To mitigate the effects of cold spells on bivalves, a number of strategies can be employed, including the use of thermal shelters such as floating covers, selective breeding of more cold-tolerant bivalves, and genetic engineering to enhance the expression of heat-shock proteins in bivalves. The impacts of cold spells on bivalves are significant, affecting both their physiological and molecular processes. Through the implementation of thermal shelters, selective breeding, and genetic engineering, the effects of cold spells on bivalves can be reduced, improving their survival and growth. Further research is required to fully understand cold spells’ impacts on bivalves and develop effective mitigation measures.

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Section: )mentioning

confidence: 99%

Surviving the cold: a review of the effects of cold spells on bivalves and mitigation measures

Masanja

Yang

et al. 2023

Front. Mar. Sci.

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Variations in the reproductive investment of a venerid bivalve, Callista chione

et al. 2019

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Understanding variations in the reproductive cycle of commercial and ecologically important bivalve species is essential to address fisheries management and climate oscillation issues. Spatial and temporal trends in the reproductive cycle of Callista chione were analysed using standard histological procedures and gonadosomatic index (GSI) for two consecutive years at two coastal sites in the Adriatic Sea. Reproductive output and fecundity were analysed quantitatively to gain better insight into the seasonal energy balance with respect to gametogenesis. A seawater temperature difference of ~4°C between the two sites likely influenced the onset and duration of spawning. At Cetina (milder temperatures), spawning was prolonged and occurred between spring and July, whereas at Pag there was only one main spawning peak in July. Both histology and GSI showed similar trends, indicating GSI to be a reliable method for analysing the main characteristics of the reproductive cycle. Conversely, the use of the body mass index (BMI) as an indicator of gonad development should be addressed carefully. Intraspecific variation in energy allocation between populations suggested life strategies modified to different habitat conditions. A higher reproductive investment and output in the Pag population directed gonadal resorption to ensure the generation of a new cycle, whereas the higher fecundity at the Cetina site indicated the production of gonads from newly available food. These results suggest successful physiological acclimatization to recent increasing temperatures.

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Evaluation of macroalgal detritus as food source for juvenile Manila clam, Ruditapes philippinarum : Effects on growth, amino acid content and fatty acid composition

et al. 2019

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Sufficient high‐quality microalgae are required for indoor nursery of juvenile Ruditapes philippinarum. However, culturing numerous microalgae to support clam feeding is a heavy burden on many hatcheries. The effects of detritus from the macroalgae Ulva pertusa, Chondrus ocellatus and Undaria pinnatifida on the growth, amino acid content and fatty acid profile of R. philippinarum were assessed as potential substitute diets. The green microalga Tetraselmis cordiformis served as comparative diet. Results revealed that the clams ingesting distinct diets presented no significant differences in growth of soft tissues, but the nutritional component of these clams differed dramatically. The clams fed with Undaria + Tetraselmis had the highest content of essential amino acids and proteins. In addition, the clams fed with single macroalgal diets and mixed macroalgal detritus and Tetraselmis showed significantly higher or statistically equal levels in n‐3/n‐6 ratio and docosahexaenoic acid (DHA)/eicosapentaenoic acid (EPA) ratio with respect to Tetraselmis diets. The relative percentages of EPA and DHA in clams fed with Undaria were 28% and 63% higher than those fed with Tetraselmis, and the arachidonic acid abundances in clams ingesting Undaria + Tetraselmis and Tetraselmis were significantly higher than those in clams ingesting other diets. Together, the diets containing single Undaria or mixed Undaria + Tetraselmis produced Manila clams with nutritional advantages in terms of essential amino acids and polyunsaturated fatty acids. Thus, the detritus of macroalgae, especially Undaria, is an appropriate substitute diet, at least partially, for culture of nutrition‐improved R. philippinarum.

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Ecology of bivalves

Cited by 6 publications

References 283 publications

Surviving the cold: a review of the effects of cold spells on bivalves and mitigation measures

Surviving the cold: a review of the effects of cold spells on bivalves and mitigation measures

Variations in the reproductive investment of a venerid bivalve, Callista chione

Evaluation of macroalgal detritus as food source for juvenile Manila clam, Ruditapes philippinarum : Effects on growth, amino acid content and fatty acid composition

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