Sharks - The State of the Science

The biological characteristics of sharks make them particularly vulnerable to overfishing. They grow slowly, become sexually mature relatively late and produce few offspring. This vulnerability is reflected in the large number of shark species that are considered to be threatened or endangered. This review of the current scientific literature on the number of sharks killed per year, the causes of this mortality, the status of shark species worldwide and the impact on ecosystems after large predators are removed provides key points

At-vessel fishing mortality for six species of sharks caught in the northwest Atlantic and Gulf of Mexico

From 1994-2005 the Commercial Shark Fishery Observer Program (CSFOP) placed fishery observers aboard US bottom longline vessels engaged in directed fishing for sharks in the region from New Jersey to Louisiana, USA. Observers routinely recorded species specific at-vessel mortality as related to enduring the stress oflongline capture. Data for 5 species of sharks (sandbar Carcharhinus plumbeus, blacktip Carcharhinus limbatus, dusky Carcharhinus obscurus, tiger Galeocerdo cuvier, scalloped hammerhead Sphyrna lewini, and great hammerhead Sphyrna mokilrran) were analyzed in this study. Multiple stepwise linear regressions indicate that age group, soak time and bottom water temperature can be used as predictors of at-vessel mortality and that size restrictions, size selective gear, restricting the soak time and time/area closures may be beneficial to fisheries targeting large coastal sharks

Tiburones: El Estado de la ciencia

Debido a sus características biológicas, los tiburones son particularmente vulnerables a la sobrepesca: crecen lento, maduran sexualmente a una edad tardía y producen pocas crías. Por ello, un gran número de sus especies se encuentran o bien amenazados o en peligro de extinción. Una revisión de la literatura científica más reciente sobre la cantidad de tiburones que mueren al año, las causas de su mortalidad y el estado de la especie en todo el mundo arroja los puntos clave

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A service evaluation of parent adherence with dysphagia management therapy guidelines: Reports from family carers supporting children with complex needs in Greece

Purpose: Many children with complex needs exhibit eating, drinking and/or swallowing disorders (dysphagia). These children often have associated learning needs, and require assistance from carers for daily tasks such as eating and drinking. The aim of this study was to identify which strategies to manage dysphagia were challenging for family carers, and reasons for any non-adherence. Method: In this service evaluation researchers observed carers during mealtimes, and investigated carer opinions of strategies used to minimise the risks of dysphagia. Eight children with complex needs aged 3.4 - 7.5 years and their primary family caregiver participated. Results: Adherence with speech and language pathologists’ dysphagia recommendations overall was over 50% in all but one case. For specific strategies, the highest adherence was observed for diet modifications of foods (89%), communication during the mealtime (83%), amount of food to present (81%) and the pacing of fluids and foods (81%). Lower levels of adherence were identified in relation to postural management (58%), environmental changes (58%), utensils (56%) and preparatory strategies (49%). Conclusion: Adherence with use of strategies to support mealtimes was over 50% in all but one case. Findings suggest that support is essential in order to promote safe mealtimes, reduce family carers’ stress and increase knowledge, confidence and adherence in implementing dysphagia guidelines in the family home

Temporal and Spatial Distribution of Finfish Bycatch in the U.S. Atlantic Bottom Longline Shark Fishery

Bycatch in U.S. fisheries has become an increasingly important issue to both fisheries managers and the public, owing to the wide range of marine resources that can be involved. From 2002 to 2006, the Commercial Shark Fishery Observer Program (CSFOP) and the Shark Bottom Longline Observer Program (SBLOP) collected data on catch and bycatch caught on randomly selected vessels of the U.S. Atlantic shark bottom longline fishery. Three subregions (eastern Gulf of Mexico, South Atlantic, Mid-Atlantic Bight), five years (2002–06), four hook types (small, medium, large, and other), seven depth ranges (300 m), and eight broad taxonomic categories (e.g. Selachimorpha, Batoidea, Serranidae, etc.) were used in the analyses. Results indicated that the majority of bycatch (number) was caught in the eastern Gulf of Mexico and that the Selachimorpha taxon category made up over 90% of the total bycatch. The factors year followed by depth were the most common significant factors affecting bycatch

Chronique de jurisprudence constitutionnelle française 2017

Désormais traditionnelle dans cette revue, la chronique de jurisprudence constitutionnelle vise à faire un état des lieux annuel des décisions rendues par le Conseil constitutionnel. Sous un angle critique, les auteurs présentent les continuité et rupture de jurisprudence, ainsi que la variabilité du contrôle exercé par le Conseil selon les droits en cause.Now traditional in this journal, the chronicle of constitutional jurisprudence aims to make an annual inventory of the Constitutional Council’s decisions. From a critical point of view, the authors present the continuity and discontinuity of case law, and the variability of the control exercised by the Council according to the rights in question

Overview of the U.S. East Coast Bottom Longline Shark Fishery, 1994–2003

The U.S. Atlantic coast and Gulf of Mexico commercial shark fisheries have greatly expanded over the last 30 years, yet fishery managers still lack much of the key information required to accurately assess many shark stocks. Fishery observer programs are one tool that can be utilized to acquire this information. The Commercial Shark Fishery Observer Program monitors the U.S. Atlantic coast and Gulf of Mexico commercial bottom longline (BLL) large coastal shark fishery. Data gathered by observers were summarized for the 10-year period, 1994 to 2003. A total of 1,165 BLL sets were observed aboard 96 vessels, with observers spending a total of 1,509 days at sea. Observers recorded data regarding the fishing gear and methods used, species composition, disposition of the catch, mortality rates, catch per unit of effort (sharks per 10,000 hook hours), and bycatch of this fishery. Fishing practices, species composition, and bycatch varied between regions, while catch rates, mortality rates, and catch disposition varied greatly between species