Fisheries Sea Scallop, Placopecten magellanicus

Stokesbury, Kevin D. E.; O’Keefe, Catherine E.; Harris, Bradley P.

doi:10.1016/b978-0-444-62710-0.00016-x

Cited by 15 publications

(32 citation statements)

References 69 publications

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“…In some cases, successfully implemented management strategies, such as temporal area closures ( P. magellanicus , east coast of USA (Hart & Rago ; Stokesbury et al . ), Patinopecten yessoensis in Japan (Uki )), catch quotas ( Pecten fumatus in Australia (Dredge ; Dredge et al . )) and stock enhancement/sea ranching ( P. yessoensis in Japan (Uki ; Kosaka )) allowed the recovery of natural populations, but in many places, aquaculture has surpassed (and sometimes replaced) wild fisheries in terms of production.…”

Section: Introductionmentioning

confidence: 99%

From an open‐access fishery to a regulated aquaculture business: the case of the most important Latin American bay scallop (Argopecten purpuratus)

Kluger

Taylor

Wolff

et al. 2018

Reviews in Aquaculture

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The South Pacific bay scallop Argopecten purpuratus represents a high‐value species harvested along the Peruvian and Chilean coastline for more than 60 years. Following the strong El Niño event of 1983/84, both countries experienced a boom in scallop fisheries, but catches dropped as soon as environmental conditions normalized. Aquaculture production began in Chile, which dominated the Latin American scallop market in the 1990s. Peruvian production remained small until the early 2000s, but has increased dramatically ever since, with a single location in northern Peru, Sechura Bay, contributing most (50%) to the Latin American scallop production. We review the historical trends of this species’ production and analyse the ecological and socio‐economic factors that have favoured Sechura Bay's progress, and largely displaced Chilean production through dominance of the market. Advantageous environmental conditions in Sechura Bay (e.g. low water depths, higher temperatures, high natural seed supply) result in improved scallop growth and production, and the socio‐economic factors, causing lower operational costs than those of the Chilean production favoured this development. The bottom‐up initiation of aquaculture operations by small‐scale producers likely created a personal incentive for the long‐term sustainable use, which differs from the more industrialized aquaculture activities in Chile.

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Section: Introductionmentioning

confidence: 99%

From an open‐access fishery to a regulated aquaculture business: the case of the most important Latin American bay scallop (Argopecten purpuratus)

Kluger

Taylor

Wolff

et al. 2018

Reviews in Aquaculture

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“…; Stokesbury et al. ). We used a two‐stage design with stations sampled on regular grids (stage 1) and four quadrats sampled at each station (stage 2; Krebs ).…”

Section: Methodsmentioning

confidence: 98%

“…Stokesbury et al. () have used video quadrats to sample scallops in U.S. waters since 1999, but the objective of these studies was area‐based population assessment and local scallop concentration was not addressed.…”

Section: Introductionmentioning

confidence: 99%

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Sea scallops exhibit strong local spatiotemporal structure associated with seabed stability and high flows

Harris

Adams²,

Stokesbury³

2018

Ecosphere

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. 2018. Sea scallops exhibit strong local spatiotemporal structure associated with seabed stability and high flows. Ecosphere 9(3):e02133. 10. 1002/ecs2.2133 Abstract. Sea scallops (Placopecten magellanicus) live along the Northwest Atlantic continental shelf and are aggregated over a broad range of spatial scales (m 2 -10 5 km 2 ). However, little is known about the spatial distribution of local scallop neighborhoods, the scale at which spawning, intra-specific competition, and predator-prey interactions occur. We surveyed 30,995 km 2 of Georges Bank and the Great South ) of scallop habitat. There were 13 persistent high-concentration aggregations (7-217 km 2 ), and all but two occurred on gravel-dominated sediments left by prehistoric glacial retreat. Model-derived benthic boundary shear stresses in the persistent aggregations averaged two times higher than in scallop habitat, but the seabed was about two times more stable because it had significantly less sand and more granule-pebble and cobble sediment. The area occupied by scallops each year varied little (9%) despite a 49% increase in total scallop abundance between 2005 and 2007, suggesting Georges Bank scallops have a proportional density population structure. Most scallops occurred alone or at low concentrations (≤2) where fertilization success is probably poor. The persistent high-concentration aggregations we identified may be critical for successful reproduction and sustainable harvest. Observing organisms at scales corresponding to their individual interactions reveals important processes shaping their landscape-scale spatiotemporal distributions. These processes are obscured by the methods typically employed to estimate abundances of commercial fishery species. The spatiotemporal structure of sea scallop distribution has important implications for the design of abundance surveys and the assumptions underlying stock assessment methods. These should be investigated. Finally, this work suggests that natural disturbance (sediment stability) may play a substantial role in shaping spatiotemporal distributions and dynamics of benthic marine populations.

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“…The survey used underwater video footage and a two-stage sampling design with stations sampled on regular grids and four quadrats sampled at each station [5]. At each station a pyramid was lowered to the seafloor.…”

Section: Methodsmentioning

confidence: 99%

Identification of persistent benthic assemblages in areas with different temperature variability patterns through broad-scale mapping

et al. 2017

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Ecosystem-based management is a place-based approach that considers the relationships between system parts. Due to the complexity of ecosystems in the marine environment it is often difficult to define these relationships in space and time. Maps illustrate spatial concepts. Here we promote ecosystem-based spatial thinking by layering datasets from a larger project that mapped benthic fauna, substrate characteristics, and oceanic conditions on monthly, annual and decadal time scales along the U.S. continental shelf. By combining maps of persistent benthic megafauna and bottom temperature variability over approximately 90,000 km2, we identified wide spread benthic animal assemblages and regional disparity in temperature variability. From a broad-scale perspective the locations of the assemblage appear to be related to sea scallop population dynamics and indicate potential regional differences in climate change resiliency. These findings offer information on a scale that correlates with marine spatial planning, and could be used as a starting point for further investigation. To spur additional analysis and facilitate their linkage to other datasets, these datasets are available through public, online data portals. Overall, this study demonstrates how the growth of maps from single to multiple elements can help promote and facilitate the multifactor, ecosystem-based thinking needed to support regional ocean planning.

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Fisheries Sea Scallop, Placopecten magellanicus

Cited by 15 publications

References 69 publications

From an open‐access fishery to a regulated aquaculture business: the case of the most important Latin American bay scallop (Argopecten purpuratus)

From an open‐access fishery to a regulated aquaculture business: the case of the most important Latin American bay scallop (Argopecten purpuratus)

Sea scallops exhibit strong local spatiotemporal structure associated with seabed stability and high flows

Identification of persistent benthic assemblages in areas with different temperature variability patterns through broad-scale mapping

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