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Some Mediterranean hatcheries use selection techniques to eliminate fish lacking a functional swimbladder. The aim of this study is to make a morphological evaluation of fish selected by swimbladder sorting techniques. Experimental selection tests were performed on 456 90-d-old sea bass (SL = 27.4 ± 2.4 mm), produced under controlled conditions, anaesthetized with MS-222 Sandoz, and selected at three different salini­ties (37, 42, and 46ppt). The different salinity conditions under which sorting took place had no significant effect on separation efficiency, which was found to be 100% for the floating fraction and 99.21% for the sinking fraction. One-hundred-and-eighty- one animals with swimbladder (S+) and 81 without ( S - ) were fixed in 4% formalin, stained, and observed in order to detect any cartilage or bone anomalies. In both groups of fish (S+ and S - ) , anomalies in the vertebral axis, the vertebrae, and in the fins, as well as the frequency of calculi in the terminal tract of the urinary duct were counted and compared using the x2 test. The S - group is characterized by: shorter standard length, higher frequency of anomalies of vertebrae and of the vertebral axis, and higher frequency of individuals with calculi in the terminal tract of the urinary ducts. Fin anomalies were found to be evenly distributed in both groups. The results led to the following conclusions: (1) morphological evidence confirms the effectiveness of the method in separating fish with swimbladders from those without; (2) the selection method does not provide a total guarantee of fish quality on a morphological basis: as many as 93.8% of the S+ fry were found to have skeletal anomalies. Article from Marine Science Symposia Vol. 201 - "Mass rearing of juvenile fish". Symposium held in Bergen, 21-23 June 1993. To access the remaining articles please click on the keyword "MSS Vol. 201".

Coronavirus disease-19 (COVID-19), caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), represents one of the biggest challenges of 21st century, threatening public health around the globe. Increasing age and presence of co-morbidities are reported risk factors for severe disease and mortality, along with autoimmune diseases (ADs) and immunosuppressive treatments such as haematopoietic stem cell transplantation (HSCT), which are also associated with adverse outcomes. We review the impact of the pandemic on specific groups of patients with neurological, rheumatological, and gastroenterological indications, along with the challenges delivering HSCT in adult and pediatric populations. Moving forward, we developed consensus-based guidelines and recommendations for best practice and quality of patient care in order to support clinicians, scientists, and their multidisciplinary teams, as well as patients and their carers. These guidelines aim to support national and international organizations related to autoimmune diseases and local clinical teams delivering HSCT. Areas of unmet need and future research questions are also highlighted. The waves of the COVID-19 pandemic are predicted to be followed by an “endemic” phase and therefore an ongoing risk within a “new normality”. These recommendations reflect currently available evidence, coupled with expert opinion, and will be revised according to necessary modifications in practice.

International audience; Meeting Abstract PS-188

International audience; Meeting Abstract PS-189

Food uptake follows rules defined by feeding behaviour that determines the kind and quantity of food ingested by fish larvae as well as how live prey and food particles are detected, captured and ingested. Feeding success depends on the progressive development of anatomical characteristics and physiological functions and on the availability of suitable food items throughout larval development. The fish larval stages present eco-morpho-physiological features very different from adults and differ from one species to another. The organoleptic properties, dimensions, detectability, movements characteristics and buoyancy of food items are all crucial features that should be considered, but is often ignored, in feeding regimes. Ontogenetic changes in digestive function lead to limitations in the ability to process certain feedstuffs. There is still a lack of knowledge about the digestion and absorption of various nutrients and about the ontogeny of basic physiological mechanisms in fish larvae, including how they are affected by genetic, dietary and environmental factors. The neural and hormonal regulation of the digestive process and of appetite is critical for optimizing digestion. These processes are still poorly described in fish larvae and attempts to develop optimal feeding regimes are often still on a 'trial and error' basis. A holistic understanding of feeding ecology and digestive functions is important for designing diets for fish larvae and the adaptation of rearing conditions to meet requirements for the best presentation of prey and microdiets, and their optimal ingestion, digestion and absorption. More research that targets gaps in our knowledge should advance larval rearing. © 2013 Wiley Publishing Asia Pty Ltd., This study benefited from participation in LARVANET – COST action FA0801 (EU RTD framework Programme). I.R. received funding from the Research Council of Norway (CODE- 199482 and GutFeeling- 190019) and the EC FP7 (LIFECYCLE- 222719). M.Y. received financial support from the Spanish Ministry of Science and Innovation MICINN + FEDER/ERDF (projects AGL2007-64450-C02-01 and Consolider Ingenio 2010 Program-project Aquagenomics CSD2007-0002). C.B. received funding from the Italian Ministry of Agricultural, Forestry and Alimentary Policy (Law 41/82) (projects 5C49- 6C138).

Trabajo presentado en el World Aquaculture 2012, celebrado en Praga del 1 al 5 de septiembre de 2012.

The presence of sublethal morphological deformities represents one of the main bottleneck of the industrial finfish hatchery production, resulting in major economic loss due to reduced growth and marketing ability of the final product, that has to be transformed (filets) or sold for fish flour. Furthermore, the elimination of deformed fishes from the productive cycle needs for periodic selections at present carried out by manual sorting. This represents an additional economic cost, and a stress for fishes. This work benefits from participation in LARVANET COST action FA0801.