The hydroid and early medusa stage ofOlindias formosus(Cnidaria, Hydrozoa, Limnomedusae)

2014 ◽  
Vol 94 (7) ◽  
pp. 1409-1415 ◽  
Author(s):  
Wyatt Patry ◽  
Thomas Knowles ◽  
Lynne Christianson ◽  
Michael Howard

Olindiasspp. medusae are found worldwide in sublittoral tropical and sub-tropical coastal regions; their occurrence near shore can result in human envenomation events. While behaviour of medusae and human contact with medusae has been documented for the genus, the hydroid (polyp) phase of theOlindiaslife cycle has eluded investigators for over a century. Given the recent debate among public media and scientific communities that jellyfish blooms are increasing worldwide, there is a growing urgency to understand how and why jellyfish populations bloom. In order to understand jellyfish population dynamics, the asexual benthic phase must be studied to determine when, where, and how juvenile medusae are produced. In this study, husbandry management strategies, including the creation of artificial habitat forOlindias formosusmedusae in aquaria were developed to encourage spawning and larval settlement. The resultant hydroid colony ofOlindias formosuswas discovered in November of 2012, utilizing the natural fluorescence of the medusa as a detection method. A description of the hydroid and early medusa stage is presented. These techniques provide a basis for locatingin situthe benthic hydroid phases within this genus and other fluorescent medusae, the discovery of which may lead to a better understanding of the causative factors for jellyfish blooms.

2008 ◽  
Vol 2008 (1) ◽  
pp. 163-167
Author(s):  
Matt Smith

ABSTRACT On 17th March 2006 an Improvised Explosive Device damaged a manifold on a pipeline, resulting in a release of Brass River crude into the Brass River itself. As soon as the spill was noticed the pipeline was shut down and the resultant release was contained by a series of booms, although an undefined amount escaped into the river. Over flights revealed a large volume of black oil from a position north of the manifold down to the mouth of the river. This was located to the eastern shoreline, with a sheen extending though out the river and extending approximately 6 kilometres offshore. It was estimated that a volume of 8000 to 9000 barrels of oil could have spilt into the river. The objectives for the personnel attending were to;Determine the fate of the oilDetermine the environmental impacts of the oil on the topography of the areaDetermine near shore and shoreline impacted areasGive technical advice to optimise time and resources for maximum oil recovery The area around the Brass River is mainly mangrove swamps and tree forests with several local communities situated adjacent to areas of sandy beach. The paper discusses the review and choice of appropriate spill management strategies; namely: mechanical recoveries, monitor & evaluate, contain & collect. It will also look in to the initial estimation and quantification of the spill as well as tracking the recorded volumes of oil throughout the duration of the spill. It concludes that the use of booms to contain the oil and then use a recovery device to recover the oil was the correct course of action to take with any black oil that escaped requiring manual clean-up either in the river or on the beach areas. The paper discusses the effectiveness of the interface with the local Tier 2 contractor, the client and the local authorities and also reviews the security measures that were in place for expatriate personnel, especially when outside guarded facilities.


2020 ◽  
Vol 16 (3) ◽  
pp. 269-278
Author(s):  
Linda Lill

Purpose The purpose of this paper is to discuss how the labor shortage is described at the national level and how these problematizations correlate to gender and diversity politics. The paper is overview of the governance of staff shortages in elderly care, how it is articulated and how the governmental scenario of solutions, which includes the channeling of unemployed migrants into elderly care. Politicians and public media describe the situation as desperate and the issue of the staff shortages in elderly care is described as a state of crisis. A highly profiled solution is to open up elderly care for unemployed migrants. Design/methodology/approach By analyzing specific management strategies for controlling a phenomenon, the paper will also be able to highlight values surrounding the phenomenon. The ambition is to understand how institutions, authorities and organizations handle practical forms of knowledge that are aimed to implement a particular policy or working method within the welfare system. Findings One important aspect of the findings is the ways in which these official political discourses link the issues of migration and the shortages of staff in elderly care. But also visualize factors in how the government bodies with the formal responsibilities and authorities express their concerns about these links and the quality of the elderly care more generally. Originality/value It is well-known that migrants are employed to take care of the growing population of elderly in Europe. In Spain and Italy, for example, immigrants are frequently employed directly by families to care for their elderly family members. This type of employment entails a series of new social risks. The most important of those risks is the global “care chain” that these arrangements incur for the sending families, who lose a family member on whom they depend. This paper is connecting the international research on the global “care chain,” but focuses on the Swedish context, where the migrants already are established and elderly care work is not linked to migration in the same way. However, the experience of migration and the importance of transnational and cultural knowledge can be influential in understanding the changing processes in Swedish elderly care, not the least as the question of staff recruitment has been linked to migration by the highest political levels.


2020 ◽  
Vol 12 (17) ◽  
pp. 6852
Author(s):  
Diana Bordalo ◽  
Carla Leite ◽  
Ângela Almeida ◽  
Amadeu M. V. M. Soares ◽  
Carlo Pretti ◽  
...  

Ultraviolet (UV) filters are present in a broad range of personal hygiene products, which may be transported via aquatic environments and domestic wastewaters due to inefficient treating station sewage removal and direct human contact. The aim of the present study was to evaluate the potential effects of a UV filter, in particular benzophenone-3 (BP3) (also known as oxybenzone) on the mussel species Mytilus galloprovincialis. Mussels were exposed to this organic substance for 96 h in environmentally relevant concentrations (10, 100, and 1000 ng/L). After exposure, biomarkers related with the mussels’ metabolism and oxidative stress were evaluated. The results revealed significantly higher activity of electron transport system and energy reserves (glycogen and protein (PROT)) at the intermediate concentration of 100 ng/L, suggesting that at lower concentrations mussels’ metabolism was not activated due to low stress. Conversely, at the highest concentration (1000 ng/L), mussels were no longer able to continue to increase their metabolic activity. Higher metabolic capacity was accompanied by increased PROT content associated with increased enzyme production to activate their antioxidant system. Nevertheless, at the highest concentration, cellular damage occurred as a consequence of ineffective activation of antioxidant and biotransformation enzymes. The results of the present study address uncertainties that are fundamental to the environmental risk assessment and management of these economically important near-shore bivalves and other marine species. Although an acute exposure was performed, alterations observed indicate the negative impacts of BP3 towards marine bivalves, which could be enhanced after longer exposure periods or if mussels are simultaneously exposed to other stressors (e.g., other pollutants or climate change related factors). The present study may thus contribute to the definition of fundamental knowledge for the establishment of appropriate regulatory guidelines and practices that ensure the preservation and sustainability of biological resources, allowing for prediction and mitigation of the impacts from these compounds.


Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 825
Author(s):  
Federico Tacoli ◽  
Elena Cargnus ◽  
Pietro Zandigiacomo ◽  
Francesco Pavan

To reduce the impact of synthetic insecticides on human health and the environment, eco-friendly alternatives must be investigated. Knowledge of the side effects on pests and natural enemies of natural products applied to vineyards is very useful. Sulfur dust, which is used in vineyards to control powdery mildew, is investigated in laboratory and field bioassays for its effects on Lobesia botrana egg laying, egg hatching, and larval settlement. In field trials, the efficacy of sulfur dust against the two L. botrana carpophagous generations is compared with that of Bacillus thuringiensis and kaolin, and its side effects on the phytoseiid mite Kampimodromus aberrans are evaluated. In the bioassays, sulfur dust reduced female survival by 43%, egg laying by around 80%, egg hatching by 10%, and larval settlement by 55%. In field trials, sulfur dust caused a significant decrease in the number of L. botrana larval nests of both generations, even though the efficacy was lower than that of B. thuringiensis. No negative effects of sulfur dust on the predatory mite population density was observed. On the basis of these results, in the context of Integrated Pest Management strategies in vineyards, the activity of sulfur dust against L. botrana could be exploited by timing its application to the beginning of egg laying.


2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 104-104
Author(s):  
Susy Stark

Abstract Retaining older adults in clinical trials has often been a challenge for researchers. Clinical trial procedures, aimed at improving fidelity, often offer barriers to frail older adults who have challenges traveling to medical centers and enduring long clinical assessment visits. During the COVID-19 pandemic, we modified the procedures of two randomized controlled trials. COMPASS: A novel transition program to reduce disability after stroke is a clinical trial examining the efficacy of a transition home program that provides home modifications and self-management strategies compared to stroke education. HARP: Removing home hazards for older adults living in affordable housing is a pragmatic trial examining the effectiveness of a home hazard removal program for residents of low-income housing. Modifications to the trials were designed to reduce human contact but in some cases reduced the burden on trial participants. Modified procedures addressed retention, assessment of endpoints and intervention methods.


1983 ◽  
Vol 14 (2) ◽  
pp. 86-91 ◽  
Author(s):  
Barbara W. Travers

This paper presents strategies for increasing the effectiveness and efficiency of the school-based speech-language pathologist. Various time management strategies are adapted and outlined for three major areas of concern: using time, organizing the work area, and managing paper work. It is suggested that the use of such methods will aid the speech-language pathologist in coping with federal, state, and local regulations while continuing to provide quality therapeutic services.


2020 ◽  
Vol 5 (1) ◽  
pp. 314-325
Author(s):  
Kimberly F. Frazier ◽  
Jessica Collier ◽  
Rachel Glade

Background The aim of this study was to determine the clinical efficacy of combining self-management strategies and a social thinking approach to address the social performance and executive function of an adolescent female with autism spectrum disorder. Method This research examined the effects of a social knowledge training program, “Think Social,” as well as strategies to improve higher order cognitive abilities. Results and Conclusion Although quantitative improvement was not found, several qualitative gains in behavior were noted for the participants of this study, suggesting a benefit from using structured environmental cues of self-management strategies, as well as improved social understanding through social cognitive training.


2015 ◽  
Vol 25 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Ryan W. McCreery ◽  
Elizabeth A. Walker ◽  
Meredith Spratford

The effectiveness of amplification for infants and children can be mediated by how much the child uses the device. Existing research suggests that establishing hearing aid use can be challenging. A wide range of factors can influence hearing aid use in children, including the child's age, degree of hearing loss, and socioeconomic status. Audiological interventions, including using validated prescriptive approaches and verification, performing on-going training and orientation, and communicating with caregivers about hearing aid use can also increase hearing aid use by infants and children. Case examples are used to highlight the factors that influence hearing aid use. Potential management strategies and future research needs are also discussed.


2007 ◽  
Vol 177 (4S) ◽  
pp. 9-9
Author(s):  
Ephrem O. Olweny ◽  
Sean P. Elliott ◽  
Thomas X. Minor ◽  
Jack W. McAninch

2004 ◽  
Vol 171 (4S) ◽  
pp. 42-43 ◽  
Author(s):  
Yair Latan ◽  
David M. Wilhelm ◽  
David A. Duchene ◽  
Margaret S. Pearle

Sign in / Sign up

Export Citation Format

Share Document