The incidence of sanctions against U. S. employers of illegal aliens

Emigration and immigration ; Labor market

The incidence of sanctions against U.S. employers of illegal aliens

Immigration Reform and Control Act of 1986 ; Wages

Religious affiliation and extramarital sex among men in Brazil.

CONTEXT: Since 1990, HIV infection in Brazil has spread among the heterosexual population, particularly in the north. Containment of the epidemic can be informed by a better understanding of men's sexual risk behavior. METHODS: Logistic, Poisson and multilevel logit models were applied to data on married and cohabiting men who had participated in the 1996 Brazilian Demographic and Health Survey. RESULTS: Twelve percent of married or cohabiting men reported having had at least one extramarital partner in the previous 12 months; half of these had had two or more. The majority (77%) of partners were described as friends or lovers; 4% had been prostitutes and 15% strangers. Among men who had had sex with an extramarital partner in the last year, 40% reported having used condoms during last extramarital sex. Compared with members of evangelical religions, other men were significantly more likely to report having had an extramarital partner (odds ratios, 3.0-4.7) and unprotected extramarital sex in the last 12 months (3.4-7.9). Region of residence was also strongly correlated with extramarital sex: Compared with men in southern or central Brazil, those in the north had more than three times the odds of having had extramarital sex and unprotected extramarital sex in the last year (3.1-3.8). CONCLUSION: In Brazil, religious affiliation and region of residence exert a major influence on risk behavior

Social Justice, The Common Weal and Children and Young People in Scotland

This paper argues that: • Scotland should organise itself around social justice, which addresses entitlements, redistribution, recognition and respect. • Children and young people have particular views on what social justice means for them. • Rights have a particular contribution to make to social justice in term of entitlements, claims and minimal standards. • The combination of piecemeal incorporation of children’s rights, an apolitical wellbeing framework and a lack of strong legislation to hold local authorities and other public services, private sector organisations and the third sector to account, results in children and young people encountering discrimination on an everyday basis. • To achieve social justice, a change is needed in how adults perceive children and childhood, young people and youth. Children and young people need to be recognised as contributors to their families, institutions and communities now – and not just in the future. • For children and young people to be included in the Common Weal, it needs to be concerned with the full and diverse range of structural, cultural and individual barriers that they encounter in their lives

Laboratory and field investigations of potential predation on early life stages of striped bass in the Pamunkey River, Virginia /

Predation is recognized as an important factor regulating survival of larval fishes and it is likely that both fish and invertebrate species are predators of striped bass eggs and larvae, yet few studies have documented such interactions in tidal freshwater systems. As a result, this study incorporated the following objectives: (1) determine kinds and relative abundances of potential fish and invertebrate predators of striped bass larvae through field surveys: (2) document acceptability of yolksac larvae as a prey item through laboratory experimentation with fish and invertebrate species: (3) establish preliminary estimates of consumption of yolksac larvae under laboratory conditions of varying prey density, prey consumption and container size: and (4) examine stomach contents of field collected target fish predators

Relative contribution of three Virginia rivers to spawning activity of striped bass, Morone saxatilis

Initial documentation of spawning activity of striped bass in the tidal freshwater portions of Virginia rivers was provided by Tresselt (1952), Massman et al. (1952, 1962), Rinaldo (1971) and Merriner et al. (1980). Recently, a series of pilot ichthyoplankton surveys of these habitats has resulted in data describing patterns of abundance of eggs and larvae in three separate rivers during three separate years: the Pamunkey and Mattaponi Rivers in spring 1980 (Grant and Olney 1981); the James River in 1981 (Grant and Olney 1982); and the Rappahannock in 1982 (Olney et al. 1983). These surveys were conducted in response to the objectives of the Emergency Striped Bass Study (Chafee Amendment to the Anadromous Fish Act) and have provided spatial and temporal details of spawning activity (Figures 1-4) used in the preparation of management regulations promulgated by the Virginia Marine Resources Commission. more ...

Layered Model for Radiation-Induced Chemical Evolution of Icy Surface Composition on Kuiper Belt and Oort Cloud Bodies

The diversity of albedos and surface colors on observed Kuiper Belt and Inner Oort Cloud objects remains to be explained in terms of competition between primordial intrinsic versus exogenic drivers of surface and near-surface evolution. Earlier models have attempted without success to attribute this diversity to the relations between surface radiolysis from cosmic ray irradiation and gardening by meteoritic impacts. A more flexible approach considers the different depth-dependent radiation profiles produced by low-energy plasma, suprathermal, and maximally penetrating charged particles of the heliospheric and local interstellar radiation environments. Generally red objects of the dynamically cold (low inclination, circular orbit) Classical Kuiper Belt might be accounted for from erosive effects of plasma ions and reddening effects of high energy cosmic ray ions, while suprathermal keV-MeV ions could alternatively produce more color neutral surfaces. The deepest layer of more pristine ice can be brought to the surface from meter to kilometer depths by larger impact events and potentially by cryovolcanic activity. The bright surfaces of some larger objects, e.g. Eris, suggest ongoing resurfacing activity. Interactions of surface irradiation, resultant chemical oxidation, and near-surface cryogenic fluid reservoirs have been proposed to account for Enceladus cryovolcanism and may have further applications to other icy irradiated bodies. The diversity of causative processes must be understood to account for observationally apparent diversities of the object surfaces

Larval food limitation in a speyeria butterfly (Nymphalidae): How many butterflies can be supported?

For herbivorous insects the importance of larval food plants is obvious, yet the role of host abundance and density in conservation are relatively understudied. Populations of Speyeria butterflies across North America have declined and Speyeria adiaste is an imperiled species endemic to the southern California Coast Ranges. In this paper, we study the link between the food plant Viola purpurea quercetorum and abundance of its herbivore Speyeria adiaste clemencei to better understand the butterfly’s decline and aid in restoration of this and other Speyeria species. To assess the degree to which the larval food plant limits adult abundance of S. a. clemencei in 2013, we compared adult population counts to population size predicted from a Monte Carlo simulation using data for number of V. pur. quercetorum plants, number of leaves per plant, and leaf area per plant, with lab estimates of leaf area consumed to reach pupal stage on the non-native host V. papilionacea. Results indicated an average estimate of 765 pupae (median = 478), with 77% of the distribution being \u3c1000 pupae. However, this was heavily dependent on plant distribution, and accounting for the number of transect segments with sufficient host to support a pupa predicted 371 pupae. The adult population empirical estimate was 227 individuals (95% CI is 146 to 392), which lies near the first quartile of the simulated distribution. These results indicate that the amount of host available to larvae was more closely linked to adult abundance than the amount of host present, especially when considering assumptions of the analyses. The data also indicate that robust populations require host density well in excess of what is eaten by larvae, in combination with appropriate spacing, to mitigate factors such as competition, starvation from leaving host patches, or unrelated to food plant, such as mortality from drought, predators, parasites, or disease

Revisiting an integrated approach to bean leaf beetle and bean pod mottle virus management

This article originally appeared in the 2005 ICM newsletter. However, the significance of the bean leaf beetle and bean pod mottle virus has not diminished in recent years. There is still the potential of economic damage from either or both pests. We have recently completed a three-year study that examines the complex issues of managing these two pests, but the data are still being analyzed. We also have identified potential field tolerance to virus disease. Growers are encouraged to query seed dealers regarding tolerance of varieties to virus disease. Ultimately, this will likely be the best management tool for disease control. In the meantime, we give you our best recommendations as we understand the situation in Iowa

Recent bean leaf beetle and bean pod mottle virus research

Soybean growers face a dilemma when considering management options for bean leaf beetles and bean pod mottle virus. Rayda Krell recently completed a research program at Iowa State University that focused on immediate solutions for this pest problem. This article summarizes her research from which we suggest some short-term management options