Interactive effect of diet and temperature on the growth of juvenile clams

Laing, Ian; Utting, Susan D.; Kilada, Raouf

doi:10.1016/0022-0981(87)90080-3

Cited by 107 publications

(71 citation statements)

References 20 publications

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“…Shell growth rates in Experiment 2 and 3 were similar, in spite of the fact that temperatures in Experiment 2 were high enough to be growth-limiting (Laing et al 1987), and algal concentrations were only one-third those of Experiment 2. A comparison was made of the magnitudes of the effects of the storms by calculating the percent growth change in each experiment as (recovery growth minus storm growth) + (recovery growth) ( Table 2).…”

Section: Intra-experiments Comparisonsmentioning

confidence: 52%

Behavior and growth ofMercenaria mercenaria during simulated storm events

Turner

Miller

1991

Mar. Biol.

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Abstract. Experiments were conducted in April August 1989 on juvenile Mercenaria mercenaria (L.) in an oscillatory water tunnel to simulate resuspension of bottom sediments by waves and to determine the effects of shortterm storm events on particle ingestion, pseudofeces production, and shell growth. Juveniles (mean length= 19.2 mm) were subjected to identical concentrations of algae in both low-flow, gentle waves (maximum velocity = 7 cm s -1) and high-velocity storm waves (maximum velocity = 22 cm s -1). Suspended sediment levels reached 193 mg 1-1 at 1 cm above the bed during storms. Shell growth decreased by a maximum of 38% during the storm when levels of phytoplankton were high (average cell concentration = 43 x 106 cells 1-1), and by 18 % when phytoplankton levels were low (av cell conc = 6 x 106 cells 1-1). Orientation of clam siphons was not related to flow direction. Significantly more pseudofeces were produced when the clams were subjected to increased sediment resuspension under waves, and in troughs of sand ripples. The size of sediment grains ingested did not vary significantly among the flow treatments. The decrease in shell growth during storms may be due to a reduction in filtration rate coupled with a decrease in net energy gained from filtration due to costs of pseudofeces production. The magnitude of the decrease seems to be related to concentration of algae, water temperature, age of clams and sediment transport mode (bed load or suspended load). Thus, the interpretation of growth increments must be made in the context of these environmental variables.

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Section: Intra-experiments Comparisonsmentioning

confidence: 52%

Behavior and growth ofMercenaria mercenaria during simulated storm events

Turner

Miller

1991

Mar. Biol.

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“…For instance, Pandya (1976) reported that the pearl oyster Pinctada fucata has a higher growth rate at temperatures between 19 and 28 "C than at 28 to 32 "C, and Chellam (1978) reports similar results for that species. In another example, the growth rates of cultured Tapes semidecussata, T decussata and Mercenaria mercenaria increased between 10 and 25 "C and decreased at higher temperatures (Laing et al 1987). Pteria sterna showed a somewhat similar trend as the former examples with respect to meat dry weight, C1 and food conversion rate, which were all higher for the intermediate temperature treatment.…”

Section: Discussionmentioning

confidence: 73%

Growth of the pearl oyster Plena sterna under different thermic and feeding conditions

Rio-Portilla¹,

Re‐Araujo²,

Voltolina³

1992

Mar. Ecol. Prog. Ser.

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The combined influence of temperature and food concentration on Pteria sterna growth was determined, using 3 temperatures and 3 food concentrations. During 15 wk, the shell was measured weekly along the axis of maximum growth. The 2 higher growth rates (4.8 and 4.2 mm mo-') were obtained with the highest ration, at 30 and 25 'C, while with the lowest food concentration growth was not temperature dependent. By the response surface analysis, a synergistic effect of temperature and food concentration on growth was found. Food concentration, but not temperature, had an important influence on condition index (ash free meat dry weight/shell dry weight X 100).

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“…Weekly resolution of relative growth allows comparisons with fluctuations in environmental variables such as resuspension, which may influence the growth of juvenile bivalves over short-term periods. Laboratory studies have measured weekly or shorter growth in oysters and other bivalves (Ukeles et al 1984, Davenport and Glasspool 1987, Laing et al 1987, but most field studies examine monthly growth. Our detailed measurements were the result of a new rapid methodology which allows non-destructive sampling.…”

Section: Discussionmentioning

confidence: 99%