Blue Crab (Callinectes sapidus Rathbun, 1896) Settlement at Three Georgia (USA) Estuarine Sites

Bishop, T. Dale; Miller, Harlan L.; Walker, Randal L.; Hurley, Dorset; Menken, Theron; Tilburg, Charles E.

doi:10.1007/s12237-009-9259-4

Cited by 13 publications

(6 citation statements)

References 29 publications

(46 reference statements)

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“…For example, a model whose percentage of predicted RWQEs was greater than 95% of the synthetic datasets and whose number of false alarms was less than 95% of the synthetic datasets was deemed to outperform random chance at a significance of 95% (e.g. [ 53 , 54 ]). The models were calibrated for each station by selecting: (i) the precipitation amount at the TRMM square, or (ii) the discharge value that resulted in the highest significance for that station.…”

Section: Methodsmentioning

confidence: 99%

The effects of precipitation, river discharge, land use and coastal circulation on water quality in coastal Maine

Tilburg¹,

Jordan²,

Carlson³

et al. 2015

R. Soc. open sci.

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Faecal pollution in stormwater, wastewater and direct run-off can carry zoonotic pathogens to streams, rivers and the ocean, reduce water quality, and affect both recreational and commercial fishing areas of the coastal ocean. Typically, the closure of beaches and commercial fishing areas is governed by the testing for the presence of faecal bacteria, which requires an 18–24 h period for sample incubation. As water quality can change during this testing period, the need for accurate and timely predictions of coastal water quality has become acute. In this study, we: (i) examine the relationship between water quality, precipitation and river discharge at several locations within the Gulf of Maine, and (ii) use multiple linear regression models based on readily obtainable hydrometeorological measurements to predict water quality events at five coastal locations. Analysis of a 12 year dataset revealed that high river discharge and/or precipitation events can lead to reduced water quality; however, the use of only these two parameters to predict water quality can result in a number of errors. Analysis of a higher frequency, 2 year study using multiple linear regression models revealed that precipitation, salinity, river discharge, winds, seasonality and coastal circulation correlate with variations in water quality. Although there has been extensive development of regression models for freshwater, this is one of the first attempts to create a mechanistic model to predict water quality in coastal marine waters. Model performance is similar to that of efforts in other regions, which have incorporated models into water resource managers' decisions, indicating that the use of a mechanistic model in coastal Maine is feasible.

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Section: Methodsmentioning

confidence: 99%

The effects of precipitation, river discharge, land use and coastal circulation on water quality in coastal Maine

Tilburg¹,

Jordan²,

Carlson³

et al. 2015

R. Soc. open sci.

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“…Salt marshes may serve as nursery habitat for juvenile blue crabs, particularly in locations where seagrass is absent or declining (Jivoff and Able, 2003;Bishop et al, 2010;Johnson and Eggleston, 2010). In the Gulf of Mexico, juvenile blue crab abundance is high in both seagrass and salt marsh habitats (Thomas et al, 1990;Rozas and Minello, 1998;Heck et al, 2001).…”

Section: Marshmentioning

confidence: 99%

Spatiotemporal Modeling of Nursery Habitat Using Bayesian Inference: Environmental Drivers of Juvenile Blue Crab Abundance

et al. 2022

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Nursery grounds provide conditions favorable for growth and survival of juvenile fish and crustaceans through abundant food resources and refugia, and enhance secondary production of populations. While small-scale studies remain important tools to assess nursery value of structured habitats and environmental factors, targeted applications that unify survey data over large spatial and temporal scales are vital to generalize inference of nursery function, identify highly productive regions, and inform management strategies. Using 21 years of spatio-temporally indexed survey data (i.e., water chemistry, turbidity, blue crab, and predator abundance) and GIS information on potential nursery habitats (i.e., seagrass, salt marsh, and unvegetated shallow bottom), we constructed five Bayesian hierarchical models with varying spatial and temporal dependence structures to infer variation in nursery habitat value for young juveniles (20–40 mm carapace width) of the blue crab Callinectes sapidus within three tributaries (James, York and Rappahannock Rivers) in lower Chesapeake Bay. Out-of-sample predictions of juvenile blue crab counts from a model considering fully nonseparable spatiotemporal dependence outperformed predictions from simpler models. Salt marsh surface area and turbidity were the strongest determinants of crab abundance (positive association in both cases). Highest crab abundances occurred near the turbidity maximum where relative salt marsh area was greatest. Relative seagrass area, which has been emphasized as the most valuable nursery in studies conducted at small spatial scales, was not associated with high crab abundance within the three tributaries. Hence, salt marshes should be considered a key nursery habitat for the blue crab, even where extensive seagrass beds occur. The patterns between juvenile blue crab abundance and environmental variables also indicated that identification of nurseries should be based on investigations at broad spatial and temporal scales incorporating multiple potential nursery habitats, and based on statistical analyses that address spatial and temporal statistical dependence.

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“…Several ecologically and economically important species, including the blue crab Callinectes sapidus , utilize salt marsh habitats. Salt marshes serve as an alternative nursery habitat for juvenile blue crabs in locations where seagrass – the blue crab’s preferred nursery habitat – is absent or declining (Jivoff and Able, 2003; Bishop et al, 2010; Johnson and Eggleston, 2010). Salt marshes may also serve as high quality nurseries even where seagrasses are present, particularly in microtidal locations with prolonged inundation intervals (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of structural complexity and water depth on the juvenile blue crabCallinectes Sapidusin a simulated salt marsh mesocosm

Hyman

Miller

Shi³

et al. 2023

Preprint

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The blue crab (Callinectes sapidus) is ecologically and economically important in Chesapeake Bay. Nursery habitats, which disproportionately contribute individuals to the adult segment of populations, are essential to blue crab population dynamics.Spartina alterniflora salt marshes are productive but fragmented intertidal nursery habitats which may serve as a refuge from predation for juvenile blue crabs. However, the effects of various characteristics of salt marshes on nursery metrics, such as survival, have not been quantified. Using mesocosm experiments, we examined the effects of shoot density and water depth on juvenile blue crab survival using adult blue crabs as predators. Survival increased significantly with shoot density, whereas water depth did not affect survival. Thus, in contrast to several previous studies, water depth did not influence survival of juvenile blue crabs, possibly due to different environmental conditions from prior studies. These findings indicate that salt marsh structural complexity enhances juvenile survival, and that the beneficial effect of shallow water on juvenile survival differs by environmental conditions.

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Blue Crab (Callinectes sapidus Rathbun, 1896) Settlement at Three Georgia (USA) Estuarine Sites

Cited by 13 publications

References 29 publications

The effects of precipitation, river discharge, land use and coastal circulation on water quality in coastal Maine

The effects of precipitation, river discharge, land use and coastal circulation on water quality in coastal Maine

Spatiotemporal Modeling of Nursery Habitat Using Bayesian Inference: Environmental Drivers of Juvenile Blue Crab Abundance

Effects of structural complexity and water depth on the juvenile blue crabCallinectes Sapidusin a simulated salt marsh mesocosm

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