100 research outputs found
Unintended Rehabilitation: A Comparative Analysis of Prison Animal Programs
Prison Animal Programs (PAPs) are built on the foundation of the human-animal bond. Integrating animals into correctional settings through a therapeutic approach could potentially influence many individuals as prisons continue to increase their capacity. In this comparative analysis, the United States was divided into three regional sectors and quota sampling was used to select two prison-animal programs from each sector. Purposeful sampling was used to navigate characteristics of each programâs website information, including comprehensive mission and program description. Prison-animal programs are rarely used through a therapeutic lens, resulting in little to no collected or comparative data. However, information available indicates that working with an animal can teach patience, trust, communication, and may normalize life as many inmates may have had an animal before their sentencing. Available research was favorable regarding the respective programs, which is not surprising, as most of the information was generated by the prison-animal programs themselves. Although PAP have been demonstrated to provide significant benefits to prisons and prisoners, the researcher notes there are considerable road blocks to expansion of programming including: a lengthy application process, crimes that disqualify individuals, number of dogs available for programming, and private prison closures. For the social work profession, it would be helpful to gain more research knowledge on how to best assist in rehabilitating inmates while they are in a correctional setting. Results from this study indicate prison-animal programs are one tool for assisting prisoners to do well and thrive once out of prison
Unintended Rehabilitation: A Comparative Analysis of Prison Animal Programs
Prison Animal Programs (PAPs) are built on the foundation of the human-animal bond. Integrating animals into correctional settings through a therapeutic approach could potentially influence many individuals as prisons continue to increase their capacity. In this comparative analysis, the United States was divided into three regional sectors and quota sampling was used to select two prison-animal programs from each sector. Purposeful sampling was used to navigate characteristics of each programâs website information, including comprehensive mission and program description. Prison-animal programs are rarely used through a therapeutic lens, resulting in little to no collected or comparative data. However, information available indicates that working with an animal can teach patience, trust, communication, and may normalize life as many inmates may have had an animal before their sentencing. Available research was favorable regarding the respective programs, which is not surprising, as most of the information was generated by the prison-animal programs themselves. Although PAP have been demonstrated to provide significant benefits to prisons and prisoners, the researcher notes there are considerable road blocks to expansion of programming including: a lengthy application process, crimes that disqualify individuals, number of dogs available for programming, and private prison closures. For the social work profession, it would be helpful to gain more research knowledge on how to best assist in rehabilitating inmates while they are in a correctional setting. Results from this study indicate prison-animal programs are one tool for assisting prisoners to do well and thrive once out of prison
Top-down and bottom-up control of infauna varies across the saltmarsh landscape
Author Posting. © The Author(s), 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Experimental Marine Biology and Ecology 357 (2008): 20-34, doi:10.1016/j.jembe.2007.12.003.Responses of infaunal saltmarsh benthic invertebrates to whole-ecosystem fertilization and
predator removal were quantified in Plum Island Estuary, Massachusetts, USA. Throughout a
growing season, we enriched an experimental creek on each flooding tide to 70 mM NO3
- and 4
mM PO4
-3 (a 10 x increase in loading above background), and we reduced Fundulus heteroclitus
density by 60% in a branch of the fertilized and a reference creek. Macroinfauna and meiofauna
were sampled in creek (mudflat and creek wall), marsh edge (tall form Spartina alterniflora) and
marsh platform (Spartina patens and stunted S. alterniflora) habitats before and after treatments
were begun; responses were tested with BACI-design statistics. Treatment effects were most
common in the mid-range of the inundation gradient. Most fertilization effects were on creek
wall where ostracod abundance increased, indices of copepod reproduction increased and
copepod and annelid communities were altered. These taxa may use epiphytes (that respond
rapidly to fertilization) of filamentous algae as a food source. Killifish reduction effects on
meiobenthic copepod abundance were detected at the marsh edge and suggest predator
limitation. Fish reduction effects on annelids did not suggest top-down regulation in any habitat;
however, fish reduction may have stimulated an increased predation rate on annelids by grass
shrimp. Interactions between fertilization and fish reduction occurred under S. patens canopy
where indirect predator reduction effects on annelids were indicated. No effects were observed
in mudflat or stunted S. alterniflora habitats. Although the responses of infauna to fertilization
and predator removal were largely independent and of similar mild intensity, our data suggests
that the effects of ecological stressors vary across the marsh landscape.This research was supported by the National Science
Foundation under Grants No. 0213767 and 9726921
Artemia replacement in co-feeding regimes for mysis and postlarval stages of Litopenaeus vannamei: Nutritional contribution of inert diets to tissue growth as indicated by natural carbon stable isotopes
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Shifting linguistic patterns in oyster restoration news articles surrounding the Deepwater Horizon disaster
Populations of the eastern oyster Crassostrea virginica are declining globally. With the loss of oysters, sustainable provision of natural resources and ecosystem services are also threatened. In 2010, the Deepwater Horizon (DWH) oil spill became the largest marine oil spill in history, imperiling coastal and marine habitats in the Gulf of Mexico. Whereas ecological restoration serves as an important tool in natural resource management, its success depends on achieving ecological objectives and meeting public expectations. However, little is known about how the public perceives ecological restorationâeven less in the context of disasters. It has long been understood that mass media messaging helps shape public understanding. Documenting patterned representation of oyster restoration in mass media texts can help set goals, improve stakeholder communication, and ensure required support for restoration activities. To address this goal, this study asks, does newspaper language on the topic of oyster reef restoration change in relation to an environmental disaster? If so, how? A 1.1 million-word Deepwater Horizon Oyster Restoration (DHORN) Corpusâa comprehensive body of newspaper articles about oyster restoration from 3 national and 18 gulf-state newspapersâwas developed for the period April 2008âApril 2014. The distribution and deployment of collocates of OYSTER* across three DHORN subcorpora delimited by time (pre-, during, and postDeepwater Horizon oil spill) were compared through iterative quantitative and qualitative analysis. Examination of salient collocates in use over time indicated an increase in the representation of oysters as quantifiable entities during/postDWH; at the same time, there was a decrease in the representation of the roles of OYSTER* in the Gulf ecosystem. Furthermore, multiple propositions associating oysters and oyster restoration activity with DWH and oil spills were introduced into language use by the disaster and persisted for years afterwards. This association was not present pre-DWH. Understanding shifts in linguistic patterns of oyster restoration in news articles before, during, and after Deepwater Horizon can be used to deliberately refine communication between the conservation community and both journalists and policymakers to promote conservation initiatives.This project was made possible with funding from the Harte Research Institute Fellows Program. Partial support for this publication was made possible by the National Oceanic and Atmospheric Administration, Office of Education Educational Partnership Program with Minority Serving Institutions award (NA21SEC4810004). The contents of this publication are solely the responsibility of the award recipient and do not necessarily represent the official views of the US Department of Commerce, National Oceanic and Atmospheric Administration
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Crassostrea virginica dredge efficiency in Texas estuaries
Quantifying and comparing stocks of oysters (Crassostrea virginica) within and among estuaries across the Gulf of Mexico is difficult because the sampling equipment used is either inconsistent among studies, or inefficient. In Texas, USA, stock assessments of oyster populations are made using an oyster dredge, which is an inefficient sampling tool. We compared sampling densities estimated by oyster dredges with more accurate estimates taken by diver-quadrat samples to determine a dredge efficiency rate. Our calculated efficiency rate (0.125) was negatively affected by the number of dead oysters, and the number and volume of total oysters in an area, but not affected by sediment grain size, water quality, and other oyster metrics. The dredge efficiency rate calculated in this study can be applied to past and future dredge-collected oyster quantity data to provide more realistic estimates of oyster densities and allow more accurate stock assessments and comparisons among studies and regions
Characterizing Nekton use of the Largest Unfished Oyster Reef in the United States Compared with Adjacent Estuarine Habitats
Characterizing density patterns of fish and crustaceans across estuarine habitat types can provide useful information regarding their relative value. The oyster reef complex within Sabine Lake Estuary is the largest known in the United States with no record of commercial harvest, and it presents a unique opportunity to understand the habitat value of an unfished reef system in comparison with adjacent estuarine habitats. High abundances of relatively large oysters with complex formations were observed throughout the 2-y study period. Average densities of fish and crustaceans were 6 times greater at the marsh edge than the nonvegetated shallow habitats, and 40 times greater than both the oyster reef and nonvegetated deep habitats. Low faunal densities observed in the oyster reef habitat may be the result of spatial configuration and connectivity to surrounding habitats, collection limitation resulting from its large vertical relief (>1 m) and complex 3-dimensional structure, or habitat selection resulting from water depth. Because the majority of crustaceans and resident and transient fish were observed within the marsh edge and nonvegetated shallow habitats, it is difficult to determine whether oyster reefs within Sabine Lake Estuary provide essential habitats for these species. Although low densities of organisms were observed in the oyster reef habitat, multivariate analysis indicates that the unfished reef supports a unique community of fish and crustaceans. Results provide a valuable baseline for future conservation, restoration, and management actions as we seek to understand more completely and to protect important estuarine habitat types.Publishe
Oyster Reef Restoration: Substrate Suitability May Depend on Specific Restoration Goals
A limited supply of oyster shell for restoration practices has prompted investigations of alternative substrates used in construction of artificial oyster reefs. The success of oyster reef restoration projects is increasingly focused not only on oyster densities, but also on habitat provisioning for associated fauna. A subtidal oyster reef complex (0.24âkm2) was restored in the MissionâAransas Estuary, Texas, U.S.A. , in July 2013 using replicated mounds of concrete, limestone, river rock, and oyster shell substrates. Oyster and reefâassociated fauna characteristics were quantified quarterly for 15 months, using sampling trays that were deployed 3 months after construction. The highest densities of oyster spat occurred 9 months after tray deployment (July 2014, 1,264/m2), whereas juvenile oyster densities increased throughout the study period to 283/m2. Concrete (1,022/m2) and limestone (939/m2) supported the highest number of oysters over all dates. Oyster shell (1,533/m2) and concrete (1,047/m2) substrates supported the highest densities of associated motile fauna. Faunal diversity (Hill\u27s N1 ) did not vary by substrate material, but did show seasonal variation. A simple benefitâcost ratio was used to indicate the localized monetary value for each of the substrates. Oyster shell and concrete substrates returned the highest benefitâcost ratio for motile fauna, while concrete yielded the highest benefitâcost ratio for oyster abundance. Incorporating benefitâcost ratios in restoration planning will allow practitioners to better integrate substrateâspecific ecological values with economic considerations and project goals to maximize return on restoration investments
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Morphological Assessment of the Eastern Oyster Crassostrea virginica throughout the Gulf of Mexico
The eastern oyster Crassostrea virginica is a commercially and ecologically important organism found throughout the western North Atlantic and Gulf of Mexico. Morphological differences in shell shape of eastern oysters are known to arise from environmental, genetic, and husbandry-related factors. Here, live eastern oysters were collected from 17 sites along the U.S. Gulf of Mexico coast from Texas to Florida to examine morphological differences among geographic samples. Six morphological metrics were recorded for each individual, and four different composite ratios commonly used to describe oyster shape (fan, cup, volume ratio, and weight ratio) were calculated. Principal component analysis was used to demonstrate geographic differences in ordinated shape ratios, correlating roughly with eastern (Florida), northern (Alabama, Louisiana, north Texas), and western (south Texas) samples. In Texas, differences in shape were correlated with previously described genetic population boundaries, indicating that populations north versus south of Aransas Bay had different overall shell shapes. On a broader scale, shell shape variation correlated roughly with previously described genetic population boundaries throughout the Gulf of Mexico as well as tide depth (intertidal versus subtidal reefs). Among the various factors that might act as drivers of shell shape, individual variation is important, but population structure and tide height are also significant predictor variables of shape in this species
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