Production and resource partitioning in the giant scallop Placopecten magellanicus grown on the bottom and in suspended culture

MacDonald, B. A.

doi:10.3354/meps034079

Cited by 44 publications

(16 citation statements)

References 22 publications

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“…Precise knowledge of the temporal relationship of shell and tissue production is of great importance to identify optimal harvesting times of cultured bivalves (Loo & Rosenberg 1983, Lucas & Beninger 1985, and culture conditions may result in major temporal and quantitative differences in the patterns of productivity (MacDonald 1986). The physiological costs associated with growth in shell and tissue, and the proportion of energy allocated to these and other body components, can exhibit a large degree of variation within and among bivalve populations (Thompson 1979, MacDonald & Thompson 1986, Peterson & Fegley 1986.…”

Section: Discussionmentioning

confidence: 99%

Temporal variation in shell and soft tissue growth of the mussel Geukensia demissa

Borrero¹,

Hilbish²

1988

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 99%

Temporal variation in shell and soft tissue growth of the mussel Geukensia demissa

Borrero¹,

Hilbish²

1988

Mar. Ecol. Prog. Ser.

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“…Leighton 1979, Wallace & Reinsnes 1984, Dadswell & Parsons 1991. When such data are available, higher growth away from the bottom is often attributed to differences in food quality (Wallace & Reinsnes 1985, MacDonald 1986, MacDonald & Bourne 1989, but, as indicated previously, the relationship between growth and seston is inconsistent. No index of seston quality or other environmental variables measured in the present study could account for the rapid shell growth of bottom scallops during late October or the reduced muscle growth on the bottom in late November.…”

Section: Growth and Mortality: Effects Of Cage Heightmentioning

confidence: 96%

“…Some studies found scallop growth to be uniform throughout the water column (Duggan 1973, Richardson et al 1982, but others observed that scallops closer to the bottom grew more slowly (e.g. Wallace & Reinsnes 1984, MacDonald 1986, Dadswell & Parsons 1991 or exhibited higher mortality (Duggan 1973). When environmental data were available, similar observations were attributed to either poor food conditions (Leighton 1979, Wallace & Reinsnes 1985 or in several cases a turbidity stress from resuspended sediments (e.g.…”

Section: Introductionmentioning

confidence: 99%

Growth and survival of sea scallops Placopecten magellanicus: effects of culture depth

Emerson¹,

Grant²,

Mallet³

et al. 1994

Mar. Ecol. Prog. Ser.

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We combined extensive water sampling with monthly growth measurements of juvenile sea scallops held in cages 0 to 200 cm above the bottom to (1) construct predictive empirical models of shell and soft-tissue growth based on oceanographic variables, and (2) determine whether scallops on or near the bottom can derive a food supplement from resuspended sediment when seasonal phytoplankton production is low. Variation in growth was strongly dependent on depth, but this relationship was not consistent over time or tissue type. In late fall, when phytoplankton biomass was generally low (-1 pg chl I-'), the adductor muscle of scallops on the bottom lost mass (-1.5 mg dry wt d.'), but for scallops held only 20 cm higher in the water column, growth was 2.5 mg d.'. During the winter, softtissue growth on the bottom was significantly lower than that of scallops held above the sediment surface. At this time, there was no variation in shell growth with respect to depth. At the end of the study, soft-tissue weight (excluding muscle tissue) of scallops on the bottom was -40% less than that of scallops growing 250 cm above bottom. Rather than providing an energetic benefit, results suggest that high concentrations of seston near the bottom inhibit growth. Empirical regression models of scallop growth using data from water sampling every 2 wk accounted for up to 68% of growth variation, with temperature and seston quality being the most important predictor variables. Marginal improvements to the model uslng data collected hourly with In situ probes suggest that estimates of food supply should be corrected, i.e. reduced, when high flows or high seston concentrations limit filtration rates. In addition, results indicate that attention to the magnitude and variation of predictor variables without consideration of their seasonal coherence may be a primary factor limiting the ability to construct truly predictive models of bivalve growth.

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“…A variety of techniques have been developed for the commercial culture of scallops and most consist of growing the animals in suspended culture rather than in their natural bottom habitats (Ventilla, 1982;MacDonald, 1986;Hardy, 199 1) . This is because growth in suspended culture is accelerated due to increased access to sestonic food resources (Leighton, 1979;Wallace and Reinsnes, 1985;MacDonald andThompson, 1985a, MacDonald andThompson, 1985b). Suspended culture is further advantageous because mortality due to benthic predators is reduced or eliminated.…”

Section: Introductionmentioning

confidence: 99%

Growth of the tropical scallop, Euvola (Pecten) ziczac, in bottom and suspended culture in the Golfo de Cariaco, Venezuela

Velez¹,

Freites²,

Himmelman³

et al. 2016

Preprint

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We compared the growth of the scallop Euuolu (Pecten) ziczuc (L.) in three situations whichpotentially could be used for commercial culture, in cages maintained in suspension, in cages on thebottom and in cages partly buried in a sediment bottom. The latter permitted the scallops to burythemselves as in their natural habitat. Throughout the 7-month study, growth, as measured by shelllength and muscle mass, was by far superior for scallops in the partly buried cages. Possible explanationsfor this are ( 1) that the scallops are stressed by enclosures which prevent them from buryingthemselves and (2) that organic material at the sediment/water interface is an important food resourceand E. ziczac has better access to this when it buries itself flush with the bottom. The timing of gonadalgrowth and spawning varied markedly among treatments. Some spawnings coincided with temperatureincreases but others did not. Differences between scallops in suspension compared to those in bottomtreatments suggested that reproduction is as much controlled by conditions in the immediate environmentof the scallops as by large-scale environmental factors. Survival was highest for the scallopsmaintained in partly buried cages.

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Production and resource partitioning in the giant scallop Placopecten magellanicus grown on the bottom and in suspended culture

Cited by 44 publications

References 22 publications

Temporal variation in shell and soft tissue growth of the mussel Geukensia demissa

Temporal variation in shell and soft tissue growth of the mussel Geukensia demissa

Growth and survival of sea scallops Placopecten magellanicus: effects of culture depth

Growth of the tropical scallop, Euvola (Pecten) ziczac, in bottom and suspended culture in the Golfo de Cariaco, Venezuela

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