A Comparison of the Macrofaunal Communities Inhabiting a Crassostrea virginica Oyster Reef and Oyster Aquaculture Gear in Indian River Bay, Delaware

Erbland, Patrick; Ozbay, Gulnihal

doi:10.2983/0730-8000(2008)27[757:acotmc]2.0.co;2

Cited by 37 publications

(26 citation statements)

References 18 publications

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“…In 2010, the Center for Inland Bays had 120 volunteers at 130 locations raising oysters. In addition to improving water quality through increased filtration, oyster gardens provide ecological benefits by increasing structural habitat, which attracts numerous vertebrate and invertebrate species (Erbland 2007;Marenghi 2009). It is important to realize that shellfish raised through the Delaware oyster-gardening program are solely used for restoration purposes and are not intended for human consumption.…”

mentioning

confidence: 99%

Water-Quality Parameters and Total Aerobic Bacterial and Vibrionaceae Loads in Eastern Oysters (Crassostrea virginica) From Oyster-Gardening Sites

Fay

Richards

Ozbay

2011

Arch Environ Contam Toxicol

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Oyster gardening is a practice designed to restore habitat for marine life and to improve water quality. This study determined physical and chemical water-quality parameters at two oyster gardening sites in the Delaware Inland Bays and compared them with total aerobic bacteria and Vibrionaceae concentrations in Eastern oysters (Crassostrea virginica). One site was located at the end of a man-made canal, whereas the other was located in an open bay. Measured water parameters included temperature, dissolved oxygen (DO), salinity, pH, total nitrogen, nitrate, nitrite, total phosphorus, and total suspended solids. The highest Vibrionaceae levels, as determined by the colony overlay procedure for peptidases, were at the canal site in September (3.5 × 10(5) g(-1)) and at the bay site in August (1.9 × 10(5) g(-1)). Vibrionaceae levels were significantly greater during the duration of the study at the canal site (P = 0.01). This study provides the first baseline levels for total Vibrionaceae in the Delaware Inland Bays. Minimum DO readings at the bay and canal sites were 3.0 and 2.3 mg l(-1), respectively, far less than the state-targeted minimum threshold of 5.0 mg l(-1). Total phosphorus levels exceeded recommendations of ≤0.1 mg l(-1) at the bay and canal sites for all monthly samplings, with mean monthly highs at both sites ≥0.68 mg l(-1) in August. Nitrogen occasionally exceeded the recommended level of 1.0 mg l(-1) at both sites. Overall, waters were highly degraded from high phosphates, nitrogen, and total suspended solids as well as low DO.

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confidence: 99%

Water-Quality Parameters and Total Aerobic Bacterial and Vibrionaceae Loads in Eastern Oysters (Crassostrea virginica) From Oyster-Gardening Sites

Fay

Richards

Ozbay

2011

Arch Environ Contam Toxicol

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“…For instance, natural oyster reefs in PS (mean ≈ 27 oyster m −2 ) support similar densities to reefs in Galveston Bay, TX, where live oyster abundance ranged from 0 to 52 oysters m −2 (Soniat and Brody, 1998). On cultch-planted reefs in Indian River Bay, Delaware, mean oyster density was 245 oysters m −2 (Erbland and Ozbay, 2008), similar to oyster density on cultch-planted reefs in PS (mean ≈ 259 oysters m −2 ). In Chesapeake Bay, oyster densities at harvested reefs range from 300 to 500 oysters m −2 (Mann et al, 2009), which compares favorably with densities found at cultch-planted reefs in this study, but not densities at natural reefs.…”

Section: Population Density and Recruitmentmentioning

confidence: 64%

Oyster Demographics in Harvested Reefs vs. No-Take Reserves: Implications for Larval Spillover and Restoration Success

et al. 2017

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Fishery species that reside in no-take, marine reserves often show striking increases in size and abundance relative to harvested areas, with the potential for larval spillover to harvested populations. The benefits of spillover, however, may not be realized if the populations or habitats outside of reserves are too degraded. We quantified oyster population density and demographics such as recruitment, growth, mortality, and potential larval output as a function of two types of oyster management strategies in Pamlico Sound, North Carolina, USA: (1) natural reefs + harvested and (2) restored reefs + harvested. We compared these data to demographic data collected as a function of a third type of management strategy, (3) restored reefs + protected from harvest. Mean oyster recruitment was ∼12 times higher in restored + harvested reefs than in natural + harvested reefs. Mean total oyster density was ∼8-to 72-times higher in restored + protected reefs than in restored + harvested or natural + harvested reefs, respectively. Moreover, harvested reefs exhibited truncated size structure, and few or no individuals greater than legal size (75 mm), whereas protected reefs typically had a polymodal size structure, including many large individuals. We estimate that restored + protected reefs have ∼4 to 700 times greater potential larval output m −2 than restored + harvested or natural + harvested reefs, respectively. After accounting for total sound-wide areal coverage of each reef type, total potential larval output from restored + protected reefs was ∼6 times greater than that from natural + harvested and restored + harvested reefs. Marine reserves can potentially subsidize harvested populations via larval spillover, however, in the case of oyster reefs in Pamlico Sound, the relatively degraded conditions of natural reefs (e.g., low vertical relief, low shell volume per square meter) may not provide much in the way of suitable settlement substrate to realize the benefits of larval spillover from reserves. Restoration of oyster reefs, even with a thin veneer of substrate, may improve settlement substrate to increase the benefits of larval spillover from reserves.

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“…A mesh size of 3 mm was used to be consistent with similar recent studies (e.g., O'Beirn et al 2004, Erbland & Ozbay 2008. A series of small holes (;5 mm) were drilled through the PVC (31-mm outside diameter) along the edges so the frame would fill with water and sink.…”

Section: Epifaunal Samplingmentioning

confidence: 94%

“…Oyster aquaculture can provide many of the same services as oyster reefs (Dealteris et al 2004, O'Beirn et al 2004, Erbland & Ozbay 2008, Taylor & Bushek 2008. A vast literature exists on the habitat value of oyster reefs, and research focusing on the ecological effects of oysters raised with commercial aquaculture gear is becoming more common as the industry moves away from a wild harvest fishery to a cultivated product.…”

Section: Introductionmentioning

confidence: 98%

Floating Oyster,Crassostrea virginicaGmelin 1791, Aquaculture as Habitat for Fishes and Macroinvertebrates in Delaware Inland Bays: The Comparative Value of Oyster Clusters and Loose Shell

Marenghi

Ozbay

2010

Journal of Shellfish Research

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A Comparison of the Macrofaunal Communities Inhabiting a Crassostrea virginica Oyster Reef and Oyster Aquaculture Gear in Indian River Bay, Delaware

Cited by 37 publications

References 18 publications

Water-Quality Parameters and Total Aerobic Bacterial and Vibrionaceae Loads in Eastern Oysters (Crassostrea virginica) From Oyster-Gardening Sites

Water-Quality Parameters and Total Aerobic Bacterial and Vibrionaceae Loads in Eastern Oysters (Crassostrea virginica) From Oyster-Gardening Sites

Oyster Demographics in Harvested Reefs vs. No-Take Reserves: Implications for Larval Spillover and Restoration Success

Floating Oyster,Crassostrea virginicaGmelin 1791, Aquaculture as Habitat for Fishes and Macroinvertebrates in Delaware Inland Bays: The Comparative Value of Oyster Clusters and Loose Shell

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