Energetic parameters of a population of Chlamys varia (Bivalvia: Pectinidae)

Shafee,; Conan, Gérard Y.

doi:10.3354/meps018253

Cited by 23 publications

(6 citation statements)

References 14 publications

(23 reference statements)

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“…There was some annual variation in the turnover ratio in scallops from 10 m (1982 > 1983 > 1981) and in those from 31 m (1982, 1983 > 1981). Our observations are consistent with those of Shafee & Conan (1984) for Chlamys varia, in which there is a decrease in the turnover ratio in older animals and also year-to-year variation in PIB.…”

Section: Differences Related To Water Depthsupporting

confidence: 81%

Influence of temperature and food availability on the ecological energetics of the giant scallop Placopecten magellanicus. II. Reproductive output and total production

MacDonald¹,

Thompson²

1985

Mar. Ecol. Prog. Ser.

133

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Greater somatic and gonad production were generally observed in scallops Placopecten magellanicus (Gmelin) from shallow water than in those from deeper water, where temperature and food conditions were often less favourable Annual variation in total production was attributable to differences in reproductive output rather than somatic growth, since the latter changed little from year to year. Controlled growth with opportunistic reproduction may be an appropriate strategy in the variable and unpredictable environment which scallops experience in Newfoundland.

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Section: Differences Related To Water Depthsupporting

confidence: 81%

Influence of temperature and food availability on the ecological energetics of the giant scallop Placopecten magellanicus. II. Reproductive output and total production

MacDonald¹,

Thompson²

1985

Mar. Ecol. Prog. Ser.

133

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“…Likewise, the net growth efficiencies (NGE) reported in this study rank amongst the lowest reported for bivalves (see Newell 1983, Shafee andConan 1984). The comparatively low levels of assimilation recorded in the present study (metabolic rates were however similar to previously reported values for cockles : Boyden 1972, Newell andBayne 1980), point to restrictive environmental conditions for growth, probably extremely limited food availability coupled with long-lasting periods of emersion (mean: 45% air exposure).…”

Section: Annual Growth and Reproductive Strategycontrasting

confidence: 32%

Energetics of growth and reproduction in cockles (Cerastoderma edule): Seasonal and age-dependent variations

Iglesias

Navarro

1991

Mar. Biol.

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Abstract. Seasonal patterns of growth were compared interannually between 1983 and 1985 for different ageclasses of an intertidal population of cockles, Cerastoderma edule L., in the Mundaka Estuary (Basque Country, North Spain). Growth data and simultaneous determinations of respiratory metabolism were integrated over defined periods of time in order to compute assimilation and net growth efficiency. Consistent differences between the exponents that scale both assimilation and metabolism to body size led to growth efficiency values that were a decreasing function of age. Total growth was partitioned into three components: somatic growth, reproductive output and reserve storage, and the corresponding effort indexes were calculated. Despite important differences in total growth, reproductive output was constant between years, indicating a higher reproductive effort under poorer growth conditions. Increased costs of reproduction that appeared to be associated with this higher reproductive effort did not affect somatic maintenance, since previously stored carbohydrate reserves were primarily used to fuel gametogenesis.

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“…These changes comprised a decrease in citrate synthase activity or in the concentrations of high-energy phosphates, as well as a lowering of intracellular pH. An exponential decrease in K 2 with increasing age is well documented for bivalves (Fuji & Hashizume 1974, Alimov 1981, Shafee & Conan 1984, Iglesias & Navarro 1991, Urrutia et al 1999. In some cases (Rodhouse 1978, Vahl 1981) K 2 declines rapidly until maturity is reached and then tends to level off.…”

Section: Discussionmentioning

confidence: 96%

Growth, metabolism and lipid peroxidation in Mytilus edulis: age and size effects

Сухотин¹,

Abele²,

Pörtner³

2002

Mar. Ecol. Prog. Ser.

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The age dependence of growth, metabolic rate, the degree of lipid peroxidation and antioxidative defence was studied in 3 different size groups of White Sea (Russia) blue mussels Mytilus edulis L.: small (S, wet tissue weight = 0.23 g, length 20-25 mm), medium (M, wet tissue weight = 0.52 g, length 30-35 mm) and large (L, wet tissue weight = 1.05 g, length 40-50 mm). S group mussels were 2-8 yr old, M group mussels 2-9 yr old, and L group mussels 3-10 yr old. Absolute and weight-specific growth rates were determined from the beginning of the growth season (May) to the time of sampling (August). Respiration rates were measured in individuals from all size groups. Net growth efficiency coefficients were calculated. Malondialdehyde (MDA) and fluorescent age pigment (FAP) concentrations were determined as a measure of lipid peroxidation. The level of antioxidant defence was estimated from superoxide dismutase (SOD) and catalase (CAT) activities in whole body homogenates. Metabolic performance was found to be a function of both age and body size. Weight-specific growth rates and net growth efficiencies decreased with age until mussels reached a 'critical' age, beyond which growth virtually stopped. Respiration rates were size dependent, but did not show a clear correlation with age. MDA levels remained unrelated to both age and body size, whereas FAP accumulation increased exponentially with age. However, FAP levels correlated negatively with size (growth rate). At constant body size, SOD and CAT activities did not display clear age-related changes; however, CAT activity decreased significantly with increasing body size. As a corollary, size effects potentially mimic age effects on key physiological functions of continuously growing species, and this needs to be considered in physiological studies of the ageing process.

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Energetic parameters of a population of Chlamys varia (Bivalvia: Pectinidae)

Cited by 23 publications

References 14 publications

Influence of temperature and food availability on the ecological energetics of the giant scallop Placopecten magellanicus. II. Reproductive output and total production

Influence of temperature and food availability on the ecological energetics of the giant scallop Placopecten magellanicus. II. Reproductive output and total production

Energetics of growth and reproduction in cockles (Cerastoderma edule): Seasonal and age-dependent variations

Growth, metabolism and lipid peroxidation in Mytilus edulis: age and size effects

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