Offshore Migratory Corridors and Aerial Photogrammetric Body Length Comparisons of Southbound Gray Whales, Eschrichtius robustus, in the Southern California Bight, 1988–1990

Through most of their annual migration, gray whales, Eschrichtius robustus, remain within 10 km of shore, but in the Southern California Bight many individuals migrate much farther from shore. This paper summarizes aerial survey and photogrammetric efforts to determine body lengths and temporal and spatial distributions of migratory gray whales in the southern portion of the Southern California Bight. Aerial surveys were flown along 13 east–west transects between lat. 32°35′N and 33°30′N during the southbound gray whale migratory seasons of 1988–90 in the Southern California Bight. Photogrammetry was used to obtain body length estimates of animals during some of the surveys. A total of 1,878 whales in 675 groups were sighted along 25,440 km of transect distance flown and 217 body lengths were measured. Using position and heading data, three major migratory pathways or corridors in the southern portion of the bight are defined. Those migrating offshore were split almost evenly between two corridors along the west sides of Santa Catalina and San Clemente Islands. These corridors converge on the mainland coast between San Diego and the United States–Mexico border. No whales larger than 11.5 m were photographed within 30 km of the mainland coast, suggesting that smaller, and presumably younger, whales use the coastal migratory corridor through the California Bight

Ichthyofaunal Diversification and Distribution in the Big Creek Watershed, Craighead and Greene Counties, Arkansas

Big Creek is a relatively small deltaic stream, in northeastern Arkansas, in an area of intense cultivation. Recently it has been dredged in the interest of flood control. Lost Creek and Mud Creek are the major tributaries of Big Creek and collectively drain the Big Creek watershed. The streams were found to have relatively low alkalinity, moderate carbon dioxide, adequate oxygen values, and relatively high turbidity. Channeling of Big Creek and Lost Creek has effectively destroyed distinct pool-riffle biocies and reduced the number of acceptable spawning areas. Lost Creek, also, receives effluent from residential dwellings, a secondary treatment sewage plant, and a meat rendering plant. Mud Creek, in the absence of channeling and deleterious effects of effluents, provided a relatively greater diversity of habitat than did Big Creek or Lost Creek

Are determinants of rural and urban food security and nutritional status different?

Undernutrition of children 0-60 months old in Mozambique is much higher in rural than in urban areas. Food security is about the same, although substantial regional differences exist. Given these outcomes, we hypothesized that the determinants of food security and nutritional status in rural and urban areas of Mozambique would differ as well. Yet we find that the determinants of food insecurity and malnutrition, and the magnitudes of their effects, are very nearly the same. The difference in observed outcomes appears primarily due to differences in the levels of critical determinants rather than in the nature of the determinants themselves.Malnutrition. ,Nutritional status. ,Rural conditions Analysis. ,Urban poor Mozambique. ,Rural poor Mozambique. ,Food security. ,

Stunted child - overweight mother pairs

health ,Nutritionally induced diseases ,Children Growth ,

Some urban facts of life

This review of recent literature explores the challenges to urban food and nutrition security in the rapidly urbanizing developing world. The premise of the manuscript is that the causes of malnutrition and food insecurity in urban and rural areas are different due primarily to a number of phenomena that are unique to or exacerbated by urban living. These areas include (1) a greater dependence on cash income; (2) weaker informal safety nets; (3) greater labor force participation of women and its consequences for child care; (4) lifestyle changes, particularly diet and exercise patterns; (5) greater availability of public services, but questionable access by the poor; (6) greater exposure to environmental contamination; and (7) governance by a new, possibly nonexistent, set of property rights. The main focus is on identifying what is different about urban areas, so as to better frame the program and policy responses.Urbanization. ,employment ,Child care ,Malnutrition. ,Labor ,Food security. ,Nutrition ,Property rights ,

A Course on Economic Justice: The intersection of philosophy and economics

The process of teaching a topic that inhabits the upper reaches of both philosophy and economic theory, while swooping as near the earth as political policy, is both exhilarating and terrifying. To do it well is indeed rare. We present our approach, some of the characteristics and thoughts from our students, and some of the insights that we developed along the way.economics and philosophy; economic justice; interdisciplinary teaching

Stunted child - overweight mother pairs

"This paper explores the global prevalence of an emerging phenomenon: the coexistence of a stunted child and an overweight mother in the same household. It also tests whether this phenomenon is associated with a country's level of economic development and urbanization. Policy directions for public nutrition are highlighted. Data from 36 Demographic and Health Surveys (DHS) were used (23 in Africa, 8 in Latin America, and 5 in Asia). Stunting was defined as height-for-age 25 kg/m 2 . World Bank and United Nations figures were used for GNP per capita (our indicator of economic development) and for level of urbanization, respectively. Descriptive statistics were derived, and regression analysis was used to model the association between economic development, urbanization, and the prevalence of stunted children and overweight women (SCOWT). The prevalence of SCOWT is generally below 10 percent, except in four countries, of which three are in Latin America. Among our sample of countries, SCOWT is generally more prevalent in Latin America than in Africa, and is below 5 percent in all five Asian countries. Contrary to our expectations, SCOWT is not necessarily more prevalent in urban than rural areas. In fact, when economic development is controlled for, SCOWT is associated with urbanization only in Latin America. In Africa and Asia, SCOWT is associated with economic development, but not urbanization, which suggests that SCOWT may emerge only at levels of economic development and urbanization higher than currently seen in most of the Asian and African countries studied...." from Authors' Abstracthealth ,Nutritionally induced diseases ,Children Growth ,

Open/Closed String Topology and Moduli Space Actions via Open/Closed Hochschild Actions

In this paper we extend our correlation functions to the open/closed case. This gives rise to actions of an open/closed version of the Sullivan PROP as well as an action of the relevant moduli space. There are several unexpected structures and conditions that arise in this extension which are forced upon us by considering the open sector. For string topology type operations, one cannot just consider graphs, but has to take punctures into account and one has to restrict the underlying Frobenius algebras. In the moduli space, one first has to pass to a smaller moduli space which is closed under open/closed duality and then consider covers in order to account for the punctures