The Influence of Seasonal Changes on Energy Metabolism in Mytilus edulis (L.). I. Growth Rate and Biochemical Composition in relation to Environmental Parameters and Spawning

Pieters, H.; Kluytmans, J.H.; Zurburg, W.; Zandee, D.I.

doi:10.1016/b978-0-08-023217-1.50043-6

Cited by 36 publications

(27 citation statements)

References 11 publications

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“…These patterns have been observed in locations such as the Conwy estuary. Wales, UK (Dare & Edwards 1975), Dutch Wadden Sea (Pieters et al 1979(Pieters et al , 1980, Killary Harbour, Ireland (Rodhouse et al 1984a, b) and Whitsand Bay, England . The latter authors also demonstrated correspondence between biochemical (protein) and elemental (N) tissue composition.…”

Section: Discussionmentioning

confidence: 99%

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Seasonal variation in C, N and P budgets and tissue composition of the mussel Mytilus edulis

Smaal¹,

Vonk²

1997

Mar. Ecol. Prog. Ser.

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Net C , N and P budgets of mussels were measured monthly in a field laboratory for a year. The calculated scope for growth was compared with the observed growth rates per month, for each element. Assuming ambient food, scope for growth was calculated and compared with changes in the tissue composition of mussels from a n estuarine field population. When total organic material was used as food, the calculated scope for growth overestimated the actual growth rates throughout the year. When phytoplankton was considered to be the main food source, the scope for growth provided by each element compared well with observed changes in tissue content, except during the spawning period. Durlng spawning, the difference between growth and scope for growth indicated a considerable loss of C, N and P. These losses exceeded estimated loss through gametes, indicating additional loss, ascnbed to tissue damage. Good correspondence was found between the predicted and observed C:N:P stoichiometry of mussels. Compared with phytoplankton, mussels contained relatively more N The absorption efficiencies of C, N and P were not significantly different, but in most cases the excretion ratios of C:N and N:P showed that N accumulated more than C and P. Average annual net growth efficiency was higher for P than for C and N. Elemental residence time in tissue, however, was highest for N. It is concluded that mussels are able to use N more efficiently than C and P, because they retain it better.

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Section: Discussionmentioning

confidence: 99%

“…It seems probable that the dry weight losses we measured in March and June were associated with 2 spawning peaks (see Hummel et al 1989). Weight decrease of mussels in autumn and winter is a normal phenomenon in temperate zones, and is attributed to food scarcity (see Pieters et al 1979).…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation in C, N and P budgets and tissue composition of the mussel Mytilus edulis

Smaal¹,

Vonk²

1997

Mar. Ecol. Prog. Ser.

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“…From Table 3 it can be seen that the 13?Cs/134Cs and the ^Zr/ ^Nb ratios in mussel tissue vary throughout the year. The ^c s /~~~c s discharge ratios were 10.9 and 12.4, and the '"Zr/^Nb discharge ratios were 0.61 and 0.59 respectively in 1979 and1980 (BNFL;. The equilibrium value for the ^Zr/^Nb ratio is approximately 0.45 and the highest value of 0.71 observed for the March samples does infer that the ^Zr contained in these samples is of more recent origin relative to other samples which had a ratio of -0.45 to 0.55.…”

Section: Radionuclide Concentration Of the Mussel Populationmentioning

confidence: 99%

Concentration and depuration of some radionuclides present in a chronically exposed population of mussels (Mytilus edulis)

Clifton¹,

Stevens²,

Hamilton³

1983

Mar. Ecol. Prog. Ser.

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Factors are described which affect the concentration (p Ci g-' dry wt) and loss of ^Am, 239 + 240Pur 2 3 8~u r 144Ce, 13?Cs, '^Cs, lo6Ru, ^Zr and ^Nb in an exposed population of mussels Mytilus edulis L. from Ravenglass on the Esk estuary, Cumbria, UK which receives radioeffluents from the British Nuclear Fuels Ltd. (BNFL) plant at Sellafield, some 10 km to the north. Tidal position and mussel body size have a negligible influence on the concentration of 241Am, l3?Cs and ^Ru in the total soft tissue, but variation in soft tissue weight throughout the year has a considerable influence on the apparent concentration and depuration times of these radionuclides. Apart from the clearance (ti,, biol, 1 to 3 h) of sediment-associated activity from the digestive tract, the depuration rate profiles follow a single component clearance curve with a biological half-life in excess of 200 d for ^'Am, 239 + ^OPU, 23%and l4Ve, and of 40 d for 13'Cs. The clearance of Io6Ru is more complex and consists of a 3 component depuration profile with biological half-lives of 6 h, 12 d and 260 d. The depuration profiles presented in this work are for chronically ingested isotopes under natural conditions; acute exposure will most likely result in different profiles, especially those derived from laboratory spiking experiments. Isotope ratio data support the hypothesis that the main route of entry into the mussel for the majority of the radionuclides studied is from the water. Differences in the biological half-lives observed between 239 + ^OPu and both and 241Am could be related to their different physico-chemical forms rather than a biological mechanism differentiating between these isotopes; as there are no suitable data available for the composition (chemical or physical) of the BNFL effluent it is not possible to determine whether these differences reflect procedures employed during fuel reprocessing or sediment-water interactions after discharge. This paucity of information also makes it difficult to determine the degree to which the Ravenglass mussels reflect recent discharges from BNFL.

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“…According to various authors (e.g. Dare & Edwards 1975, Pieters et al 1979), protein levels follow a reverse pattern with respect to carbohydrates. The major physiological role of proteins is the supply of structural elements and the catalysis of metabolic reactions (Dittrich 1991), and numerous studies contested the importance of proteins as a reserve (Gabbott & Bayne 1973, Zandee et al 1980).…”

Section: Influence Of the Pathological Statementioning

confidence: 99%

Variations in biochemical composition of juvenile Ruditapes philippinarum infected by a Vibrio sp.

Plana¹,

Sinquin²,

Maes³

et al. 1996

Dis. Aquat. Org.

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The biochemical composition of young Rudltapes phlllppinaruln was exanlined in 2 groups of clams, healthy clams and those expenmentally Infected with the pathogenic V~b n o P1 bactenum to document utilization of biochemical reserves in ~n d~v i d u a l s affected by 'brown ring d~s e a s e ' After 1 mo of starvation, refeedlng half of the expenmental clams induced recovery as determined by the absence of v~s u a l slgns of disease D~s e a s e was associated with decreased dry weights In both fed and starved individuals (from 41 down to 30-35 mg clam ' ) Glycogen was found to be the main biochemical reselve used by diseased ~ndlviduals A significant decrease In glycogen (from 45 down to 20-25 my g ' dry wt) was observed in infected clams Lipid and proteln amounts were related to nutritional conditions In refed ~ndividuals, carbohydrate reserves were low In s p~t c of some iecovery These results could Indicate an ~rieversible change of the digestive gland manifested by the inabil~ty to store reserves and distnbute them to other tissues In the field, mass mortal~ties obseived in infected popul a t~o n s could result from the degeneration of metabolic actlvity KEY WORDS Brown rlng disease . Clam . V~b r i o

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The Influence of Seasonal Changes on Energy Metabolism in Mytilus edulis (L.). I. Growth Rate and Biochemical Composition in relation to Environmental Parameters and Spawning

Cited by 36 publications

References 11 publications

Seasonal variation in C, N and P budgets and tissue composition of the mussel Mytilus edulis

Seasonal variation in C, N and P budgets and tissue composition of the mussel Mytilus edulis

Concentration and depuration of some radionuclides present in a chronically exposed population of mussels (Mytilus edulis)

Variations in biochemical composition of juvenile Ruditapes philippinarum infected by a Vibrio sp.

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