Maltese children with a hearing impairment : analysis of the current situation and its impact on the quality of life of parents

Understanding the effect that a diagnosis of a childhood hearing loss has on parents would help professionals adopt an approach which diminishes parents’ possible negative feelings and concerns. A sample of parents of children with hearing impairment was interviewed to document demographic data related to hearing loss in Maltese children. The present study also attempted to analyse the effect of hearing loss on the parents’ wellbeing. Parents of 23 children with a hearing loss and parents of eight children without a hearing loss participated in the study. Structured face-to-face interviews were carried out with both groups of parents. A self-devised questionnaire was used with parents of children with hearing impairment to collect information about several factors related to the hearing loss. This included documentation of the different types, degrees and causes of hearing loss as well as the ages of suspicion, diagnosis and amplification of children with a hearing loss. The World Health Organisation Quality of Life-BREF (WHOQOL-BREF) questionnaire (World Health Organisation [WHO], 1998) was then used with both groups of parents to obtain a quality of life profile in four domains: physical health, psychological health, social relationships and environment. Slight quality of life differences, which were not statistically significant, were noticed between parents of children with a hearing loss and parents of children without a hearing loss. Quality of life scores were marginally higher for parents whose gap between the day of diagnosis and the interview date was more than 24 months, when compared to parents whose gap was 24 months or less. These findings extend the limited data on the effect of hearing loss on parents’ quality of life in the Maltese context. More intensive support may be indicated for parents of children with hearing impairment, particularly in the initial stages following a diagnosis of a hearing loss. Support would help parents better understand and accept their child’s hearing impairment.peer-reviewe

Differences in biological traits composition of benthic assemblages between unimpacted habitats

There is an implicit requirement under contemporary policy drivers to understand the characteristics of benthic communities under anthropogenically-unimpacted scenarios. We used a trait-based approach on a large dataset from across the European shelf to determine how functional characteristics of unimpacted benthic assemblages vary between different sedimentary habitats. Assemblages in deep, muddy environments unaffected by anthropogenic disturbance show increased proportions of downward conveyors and surface deposit-feeders, while burrowing, diffusive mixing, scavenging and predation traits assume greater numerical proportions in shallower habitats. Deep, coarser sediments are numerically more dominated by sessile, upward conveyors and suspension feeders. In contrast, unimpacted assemblages of coarse sediments in shallower regions are proportionally dominated by the diffusive mixers, burrowers, scavengers and predators. Finally, assemblages of gravelly sediments exhibit a relatively greater numerical dominance of non-bioturbators and asexual reproducers. These findings may be used to form the basis of ranking habitats along a functional sensitivity gradient

Trawl fishing impacts on the status of seabed fauna in diverse regions of the globe

Bottom trawl fishing is a controversial activity. It yields about a quarter of the world's wild seafood, but also has impacts on the marine environment. Recent advances have quantified and improved understanding of large-scale impacts of trawling on the seabed. However, such information needs to be coupled with distributions of benthic invertebrates (benthos) to assess whether these populations are being sustained under current trawling regimes. This study collated data from 13 diverse regions of the globe spanning four continents. Within each region, we combined trawl intensity distributions and predicted abundance distributions of benthos groups with impact and recovery parameters for taxonomic classes in a risk assessment model to estimate benthos status. The exposure of 220 predicted benthos-group distributions to trawling intensity (as swept area ratio) ranged between 0% and 210% (mean = 37%) of abundance. However, benthos status, an indicator of the depleted abundance under chronic trawling pressure as a proportion of untrawled state, ranged between 0.86 and 1 (mean = 0.99), with 78% of benthos groups > 0.95. Mean benthos status was lowest in regions of Europe and Africa, and for taxonomic classes Bivalvia and Gastropoda. Our results demonstrate that while spatial overlap studies can help infer general patterns of potential risk, actual risks cannot be evaluated without using an assessment model that incorporates trawl impact and recovery metrics. These quantitative outputs are essential for sustainability assessments, and together with reference points and thresholds, can help managers ensure use of the marine environment is sustainable under the ecosystem approach to management

Fuzzy-coded longevity

Fuzzy-coded longevity for all taxa in the database, in four longevity classes (10 years)

Trawling-induced change in benthic effect trait composition – A multiple case study

Introduction: The importance of the response-effect trait dichotomy in marinebenthic ecology has garnered recent attention. Response traits, characterisingspecies responses to environmental variations, have been a dominant focus inthe development of ecological indicators for ecosystem health assessment. Incontrast, effect traits, expressing effects of organism activities on the ecosystem, still do not benefit from an equal interest in spite of the complementary facet that they provide to complete our understanding of functional diversity and ecosystem vulnerability. In this study, we explore the consequences of disturbance by bottom trawl fisheries on benthic effect trait composition.Methods: To this end, we used different contexts of environmental andtrawling conditions from thirteen case studies in European waters and applythe same analytical procedure to derive a gradient that solely account fortrawling-induced disturbance (Partial RLQ analysis).Results: Bottom trawling was found to be a selective force of benthic effect traitcomposition in a majority of case studies. In general, tube-dwelling species weremore typical of low trawling frequencies, whereas deep burrowing species weremore resistant at high trawling frequencies. Although we report significantlydeleterious effects of trawling on benthic ecosystem functions, the effect traitpattern along the gradient was never related to life span, a key response traitgenerally assumed to express recoverability following disturbance. Furthermore,we show that trends in species multi-functionality and community functionaldiversity can be negative or positive along the trawling intensity gradient.Discussion: We discuss the relevance of these results in light of recentdevelopments in the framework of response and effect trait dichotomy,and provide guidelines of trait data analysis in the context of trawl fisheries impact on the sea floor. Our findings emphasize the importance offundamental concepts from functional ecology in this context andrepresent a first step toward an assessment of trawling effect moreoriented on benthos-mediated biogeochemical processes

Data from: Assessing bottom-trawling impacts based on the longevity of benthic invertebrates

1. Bottom trawling is the most widespread human activity directly affecting seabed habitats. Assessment and effective management of the effects of bottom trawling at the scale of fisheries requires an understanding of differences in sensitivity of biota to trawling. Responses to disturbance are expected to depend on the intrinsic rate of increase of populations (r), which is expected to be linearly related to the reciprocal of longevity. 2. We examine the relationship between the longevity of benthic invertebrates and their response to bottom trawling; both in terms of the immediate mortality following a trawl pass and their subsequent rates of recovery. We collate all available data from experimental and comparative trawling studies, and test how longevity influences these aspects of sensitivity. 3. The shortest-lived organisms (1yr decreased by ~9% immediately following a trawl pass. The effect of bottom trawling in comparative studies increased with longevity, with a 2-3× larger effect on biota living >10yr than on biota living 1-3yr. We attribute this difference to the slower recovery rates of the longer-lived biota. 4. The observed relationship between the intrinsic rate of population increase (r, our metric of recovery rate) and the reciprocal of longevity matches theoretical expectation and predicts that the sensitivity of habitats to bottom trawling is higher in habitats with higher proportions of long-lived organisms. 5. Synthesis and Applications. Where the longevity of a species or the longevity distribution of a community is known or can be inferred, our estimates of depletion and intrinsic rate of increase can be combined with high-resolution maps of trawling intensity to assess trawling impacts at the scale of the fishery or other defined unit of assessment. Our estimates of r may also be used to estimate recovery times following other forms of seabed disturbance.06-Sep-201

The Apparently Relentless Spread of the Major Decapod Alien Species in the Mediterranean Basin and European Inland Waters

Among the many alien crustacean species so far recorded in the Mediterranean basin are numerous decapods\u2014crayfish, crabs and prawns\u2014that have in common the reputation of being both aggressive and adaptable to various environments. Their entrance to the Mediterranean basin has often been fostered by human actions, such as the transfer of new species for commercial purposes or accidentally, as bycatch or because they were present in discarded ships\u2019 ballast water. Marine alien species enter the Mediterranean basin from two main directions: from the Atlantic and beyond, and from the Indian Ocean via the Suez Canal. For freshwaters, the extensive European canal network is an important aid to migration, but human discards are also significant. Protection of native fauna and ecosystems is at best partial. Freshwater ecosystems particularly at risk include lagoons, river estuaries, ponds and marshes, while comparable marine systems are shallow muddy coastal regions, rocky reefs, estuaries/bays and salt marshes. Local communities, principally anglers and people working with aquatic resources, usually are curious at the appearance of a new species and the possibility of establishing a new business is often the first thought. However, freshwater decapod alien species cause major damage to agriculture production, infrastructures, riverbanks, irrigation systems and fish production, leading to consistent economic losses. In particular, they are known to be injurious to plant production, causing increasing losses to agriculture, consuming young seedlings and seeds and causing substantial water losses from field areas. Less information is available for seawater species to date, but their increasing number and growing size of populations requires the attention of the scientific community to evaluate and predict their influence on the marine environment and/or on local fish and bivalve production. Both freshwater and marine alien decapods thus represent a serious threat to native European species and have a negative impact on species richness and habitats. The economic losses caused by these species require reliable and cost-effective options for managing their abundance and if possible for their eradication