The use of fish vaccines in the Chilean salmon industry 1999-2003

This study summarises the availability of fish vaccines in Chile in the period 1999–2003. Through a questionnaire survey, data on annual sales per product were obtained from seven pharmaceutical companies and data on the corresponding farmed salmonid population eligible for vaccination were obtained from Sernapesca. More than 20 vaccines for aquacultured fish were brought to the Chilean market during the study period. The estimated number of fish being immunized by immersion increased from 93 million to more than 200 million, whereas sales of fish vaccines for injection increased from 2,008 to 16,561 l, the latter amount corresponding to approx. 150 million doses. Estimated vaccine coverage in the susceptible species ranked from 37–84% for yersiniosis (ERM), from 51–17% for salmonid rickettsial septicaemia (SRS), and from 8–78% for infectious pancreatic necrosis (IPN). Vaccine coverage against bacterial kidney disease (BKD) remained below 5%.     

Primary immune-mediated neutropenia in a cat

An 18-month-old male castrated indoor Himalayan cat was presented for recurrent fever, lethargy, and uveitis. Persistent neutropenia was identified and tests for infectious disease and bone marrow cytology were performed. Primary immune-mediated neutropenia was diagnosed and successfully treated. At the time of writing this report, 24 mo after the initial diagnosis. the patient was clinically normal and not receiving therapy.     

Rearing conditions influence nutrient availability of plant extracts supplemented diets when fed to broiler chickens

The effects of a standardised mixture of essential oils, including 5% carvacrol, 3% cinnamaldehyde and 2% capsicum (XT 6930; Pancosma S.A), on dietary apparent metabolisable energy corrected for nitrogen retention (AMEn), nutrient digestibility and mucin secretions, measured as sialic acid (SA) were investigated in broilers fed on the same diet but reared under different conditions, that is, cages and floor pens littered with wood shavings used in previous broiler study. The use of XT reduced (p < 0.05) nitrogen digestibility (0.585 vs. 0.544) and tended (p = 0.072) to reduce dry matter digestibility (0.733 vs. 0.717) of the diet when fed to birds reared in cages. However, XT supplementation improved (p < 0.05) fat digestibility (0.844 vs. 0.862) and tended (p = 0.093) to increase AMEn (14.01 vs. 14.25 MJ/kg DM) of the same diet when fed to broilers reared in floor pens. Essential oils supplementation tended (p = 0.059) to increase the secretion of SA, when fed to birds reared in cages (11.24 vs. 14.18 μg), but did not influence (p > 0.05) the SA secretion from birds reared in floor pens. The results obtained from the cage study tend to be the opposite of those obtained from the floor pen study. This suggests that the efficiency of dietary plant extracts may be influenced by the rearing/hygienic conditions of poultry. Based on the overall results, it can be concluded that information on rearing conditions should be taken into account for more complete interpretation of the experimental data emanating from experiments involving use of essential oils typified by those considered in this study.     

Overyielding in mixed pine forests with belowground complementarity: impacts on understory

European Journal of Forest Research - The impact of biodiversity loss on the functioning of forest ecosystems has become a central issue in ecology. Most reports of the positive effects of tree...     

Diversity in attitudes toward farming and patterns of work among farm women: A regional comparison

Attention to diversity in women's attitudes toward farming and in women's patterns of farm work activity expands our understanding of the linkage between agrarian structure, regional history, and the behavior and values of individual farm women. We combine several disciplinary and methodological approaches to reveal patterns in work and values in a Southern case and then verify the existence of similar patterns in the Midwest. Two divergent conceptions of women's relationship to farm and marital partnership were found in a Georgia study, the agrarian and the industrial, and we explore how they emerged in the context of the political and economic history of the South. We find these marital models are linked today to different patterns of farm work. We then extend the Georgia analysis to a statewide survey of Ohio farm women, where attitudinal diversity is not as marked, due to the stronger agrarian traditions of the Midwest and its distinct political economy. We find similar patterns, however, in Ohio farm women's work and affirm the validity of Carbert's categorization of Rosenfeld's survey items. Attention to diversity in the work patterns, values, and attitudes of farm women highlights that the term traditional is a misnomer when applied to Southern women and reinforces the value of multi-disciplinary approaches and regional comparisons.