Predicting the effects of freshwater diversions on juvenile brown shrimp growth and production: a Bayesian-based approach

Adamack, Aaron T.; Stow, Craig A.; Mason, Doran M.; Rozas, Lawrence P.; Minello, Thomas J.

doi:10.3354/meps09431

Cited by 22 publications

(14 citation statements)

References 57 publications

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“…The mean salinities when these bay-specific maxima occur were from 24 to 29. This non-linear relationship between salinity and brown shrimp characteristics is consistent with other studies that claim that too much freshwater can negatively impact brown shrimp production (Adamack et al, 2010;Rozas & Minello, 2011). However, this current study suggests that droughts decrease the abundance of brown shrimp relative to normal conditions within the Guadalupe and Lavaca-Colorado Estuary.…”

Section: Epifaunal Speciessupporting

confidence: 93%

Impacts of droughts and low flows on estuarine water quality and benthic fauna

Palmer

Montagna

2015

Hydrobiologia

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The effects of droughts on benthic infaunal communities and three epifaunal species were determined in three semi-arid central Texas estuaries with different inflow dynamics and consequent salinity regimes: the Nueces, Lavaca-Colorado, and Guadalupe Estuaries. Periods (months or years) were considered to be in drought if mean salinities were in the upper quartile of historic salinities. This drought classification method was verified by comparing the Palmer Drought Severity Index of the catchments with the drought classifications within each estuary. Droughts have demonstrable effects on estuary water column condition, notably decreases in turbidity, nutrient concentrations, and chlorophyll concentrations. Droughts do not appear to be important drivers of infaunal communities in estuarine regions with normally high salinities (25-32) although they coincide with increased diversity and changes in community composition in estuarine regions that have lower salinities (10)(11)(12)(13)(14)(15)(16)(17)(18)(19). Droughts cause decreases in Litopenaeus setiferus (white shrimp) and Callinectes sapidis (blue crab) abundances and spatial extents. This indicates that droughts, especially when combined with water diversions, may negatively affect primary and secondary productions in other semi-arid estuaries of the world.

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Section: Epifaunal Speciessupporting

confidence: 93%

Impacts of droughts and low flows on estuarine water quality and benthic fauna

Palmer

Montagna

2015

Hydrobiologia

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“…These results might generally explain the highly variable field distributions reported for brown shrimp and white shrimp in relation to estuarine salinity (see Adamack et al 2012;Rozas and Minello 2010 for reviews). Apparent relationships between shrimp abundance and salinity may be caused by interactions with other environmental factors such as water temperature or with secondary and related factors such as the abundance of benthic infaunal food (Rozas and Minello 2011).…”

Section: Discussionmentioning

confidence: 86%

Salinity Selection by Juvenile Brown Shrimp (Farfantepenaeus aztecus) and White Shrimp (Litopenaeus setiferus) in a Gradient Tank

Doerr

Liu

Minello

2015

Estuaries and Coasts

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Changes in freshwater inflow and salinity patterns may affect the nursery value of estuarine systems for penaeid shrimp, but the relationship between salinity and shrimp abundance is complex and likely confounded by other environmental variables. Laboratory experiments can provide insights into salinity selection, and we designed an experimental gradient tank to examine salinity preferences of juvenile brown shrimp and white shrimp. Our design uses gently flowing water to eliminate various physical constraints often associated with selection experiments. We conducted experiments with juvenile brown shrimp (12 trials) and white shrimp (seven trials), to examine selection for salinities along a gradient from 1 to 42. Data were analyzed using contingency tables and log-linear modeling to examine relationships with salinity and possible interactions with temperature. Both brown shrimp and white shrimp were present in all salinities examined within the experimental range. In general, brown shrimp showed a preference for salinities from 17 to 35 and demonstrated avoidance for the extreme low salinities along the gradient. Results for white shrimp were not statistically significant, and this species did not appear to avoid low salinities. There was no effect of water temperature on the observed selection patterns for brown or white shrimp. Our results suggest that although salinity preferences likely exist for these species, strong distribution trends associated with salinity gradients in estuaries are likely caused by other environmental factors.

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“…Research has clearly demonstrated the relationship between environmental covariates and juvenile shrimp abundance and survival; shrimp growth rates are highly sensitive to water temperature, and smaller shrimp are subject to higher mortality rates (Minello et al 1989;Haas et al 2001Haas et al , 2004Roth et al 2008;Adamack et al 2012). Additional field and laboratory studies of brown shrimp and other penaeid species have also shown a positive association between early shrimp survival and the presence of cordgrass Spartina spp.…”

mentioning

confidence: 99%

A Framework for Exploring How Density Dependence Early in the Life History Can Affect Louisiana's Brown Shrimp Fishery

et al. 2017

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The dynamics underlying fisheries stock-recruitment relationships are often obscure, especially with relatively shortlived invertebrate species, such as the brown shrimp Farfantepenaeus aztecus. Nonetheless, disentangling these dynamics can help to reveal optimal management strategies for long-term sustainability. We developed a matrix model to link early shrimp life history with the fishable stock and nested the degree of density-dependent settler (i.e., juvenile) survival in a Beverton-Holt framework. Density dependence in the settler stage was assumed to have an inverse relationship with marsh habitat availability. Thus, we could determine the level of potential compensation in the settler stage and compare how changes in habitat versus fishing pressure could ultimately affect Louisiana's brown shrimp population. A simplified Bayesian state-space (i.e., hierarchical) model provided a theoretical framework for estimating density dependence and exploring how substantial increases in catch or density-dependent settler survival affected long-term abundance in all stages. At the baseline degree of density-dependent settler survival, which was estimated from observed CPUE data, the brown shrimp population was largely resilient to even a twofold increase in catch. However, a 50% loss of habitat had Subject editor:

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Predicting the effects of freshwater diversions on juvenile brown shrimp growth and production: a Bayesian-based approach

Cited by 22 publications

References 57 publications

Impacts of droughts and low flows on estuarine water quality and benthic fauna

Impacts of droughts and low flows on estuarine water quality and benthic fauna

Salinity Selection by Juvenile Brown Shrimp (Farfantepenaeus aztecus) and White Shrimp (Litopenaeus setiferus) in a Gradient Tank

A Framework for Exploring How Density Dependence Early in the Life History Can Affect Louisiana's Brown Shrimp Fishery

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