Skin and liver diseases induced in flounder (Platichthys flesus) after long-term exposure to contaminated sediments in large-scale mesocosms.

Disease development in flounder (Platichthys flesus) was studied over a period of 3 years in three large mesocosms (40 m x 40 m x 3 m). Two of the mesocosms contained clean sand and the third, sharing a common water circulation with one of the clean-sand mesocosms, was stocked with contaminated dredged spoil. In this way, one of the clean-sand mesocosms was indirectly polluted via the water phase, and analysis of contaminant concentrations in sediments and flounder tissues showed that it had a status intermediate between the other two. Random samples of the flounder populations from the indirectly polluted and reference mesocosms were examined every 2 months for epidermal diseases (lymphocystis, skin ulcers, fin rot) and then released. In addition, every 6 months, random samples of fish from all three mesocosms were sacrificed for histological and chemical investigation. With regard to the development of epidermal disease, the results showed little difference between the reference mesocosm and the indirectly polluted mesocosm, with the exception that lymphocystis was significantly elevated in the indirectly polluted mesocosm. Although pollution may be a risk factor in the etiology of this disease, such a relationship would probably be obscured under field conditions due to variation arising from other factors. Histopathological analysis of the livers revealed in total four cases of hepatocellular adenoma (1.5% of sampled population) in fish from the polluted mesocosms, the first occurring after 2.5 years of exposure in fish from the indirectly polluted mesocosm. Furthermore, several other liver lesions, including foci of cellular alteration and hydropic vacuolated lesions, developed during the course of the experiment before tumor formation was apparent. Prevalences of these conditions were very much lower in the reference mesocosm than in the two polluted mesocosms. Densities of melanomacrophage centers in the liver showed a similar trend. The findings clearly indicate that long-term exposure to chemically contaminated dredged spoil can induce liver neoplasia and other liver lesions in flounder at contaminant levels comparable to those found in the natural environment

The Experiences of Mothers of Children with Autism Spectrum Disorder: Managing Family Routines and Mothers' Health and Wellbeing

Background/aim Families of children with autism spectrum disorder (ASD) use family routines to provide predictability and structure to support occupational engagement of their family members. Mothers assume the major role to orchestrate occupations in constructing family routines, which may impact their health and wellbeing. However, the experiences of mothers in managing family routines and their health and wellbeing have not been the main focus in previous research. Thus, this study explored the experiences of mothers of children with ASD in managing family routines and their perceptions of the impact of family routines on their health and wellbeing. Methods An interpretive phenomenological approach was used. Twenty mothers of children with ASD, aged between 28 and 56 years, participated in semi-structured interviews. Data were transcribed verbatim and each transcript was analysed. Results Five themes that summarise mothers' perceptions towards health and wellbeing when managing family routines emerged: (i) Keeping on track keeping healthy; (ii) My life is busy, because I do everything for everyone else; (iii) Keeping on track all the time is tiring or frustrating; (iv) Looking after my family by looking after myself; and (v) I am not perfect and it is OK. Conclusion This study highlighted the substantial efforts required in constructing family routines that may be at the cost of mothers' health and wellbeing. However, mothers may be able to cope with everyday demands in managing family routines by changing their perspectives. By integrating 'me-time' activities in family routines, mothers may be able to support their own health and wellbeing. Mothers' values and needs are reflected in family routines; hence, thorough understanding of family routines may be a key to support mothers' occupational engagement

How do parents manage irritability, challenging behavior, non-compliance and anxiety in children with Autism Spectrum Disorders? A meta-synthesis

Although there is increasing research interest in the parenting of children with ASD, at present, little is known about everyday strategies used to manage problem behaviour. We conducted a meta-synthesis to explore what strategies parents use to manage irritability, non-compliance, challenging behaviour and anxiety in their children with ASD. Approaches included: (1) accommodating the child; (2) modifying the environment; (3) providing structure, routine and occupation; (4) supervision and monitoring; (5) managing non-compliance with everyday tasks; (6) responding to problem behaviour; (7) managing distress; (8) maintaining safety and (9) analysing and planning. Results suggest complex parenting demands in children with ASD and problem behaviour. Findings will inform the development of a new measure to quantify parenting strategies relevant to ASD