130 research outputs found
Figure 2 in Morphometric structure and allometry profiles of the giant red shrimp Aristaeomorpha foliacea (Risso, 1827) in the eastern Mediterranean
No full textFigure 2. Morphometric measurements taken on Aristaeomorpha foliacea (Risso, 1827). CL, carapace length; T, telson; U, uropodal exopodite; S, scaphocerite; P, third pereiopod; R, rostrum; ABD, abdomen.Published as part of Kapiris, Kostas, 2005, Morphometric structure and allometry profiles of the giant red shrimp Aristaeomorpha foliacea (Risso, 1827) in the eastern Mediterranean, pp. 1347-1357 in Journal of Natural History 39 (17) on page 1350, DOI: 10.1080/00222930400008728, http://zenodo.org/record/521450
A bio-economic evaluation of the potential for establishing a commercial fishery on two newly developed stocks: the Ionian Red Shrimp Fishery
No full text9 pages, 4 figures, 4 tables[EN] It has recently been shown that two deep-water red shrimp species (Aristeus antennatus and Aristaeomorpha foliacea) have the potential to support a viable fishery in the Greek Ionian Sea (eastern Mediterranean). In this article, we investigate (i) the evolution that this newly developed trawl shrimp fishery may undergo when subjected to different management measures, and (ii) the most suitable extraction rates considering the uncertainties about the resource. We further analyse the effects that potential future fuel price increases and changes in the market may have on the fishery. Forecasting the biological and economic consequences of management actions, as well as the effects of market changes on inputs and outputs before they are applied, may help managers select the most suitable management options. We approach the problem by means of bio-economic simulation analysis. The results of this study show that fishing effort can increase by 50-100%, increasing the fleet’s profitability without jeopardizing the sustainability of the fishery[ES] Recientemente se ha demostrado que dos especies de gambas rojas de profundidad (Aristeus antennatus and Aristaeomorpha foliacea) tienen el potencial de sostener una pesquería viable en el mar Jónico griego (Mediterráneo oriental). En este trabajo investigamos i) la evolución que esta nueva pesquería de gambas puede tener ante distintas medidas de gestión, y ii) cuáles serían las tasas de extracción del recurso más adecuadas teniendo en cuenta la incertidumbre sobre el recurso. Además analizamos los efectos que puedan tener sobre la pesquería el aumento del precio del combustible y cambios en el precio de mercado. La proyección de las consecuencias biológicas y económicas de las acciones de gestión, así como los efectos de cambios en el mercado sobre las entradas y salidas antes de ser aplicadas puede ayudar a los gestores a seleccionar las opciones de gestión más adecuadas. Proporcionamos una aproximación al modelo mediante análisis bio-económico de simulación. Los resultados de este estudio muestran que el esfuerzo de pesca puede aumentar en un 50 a 100%, aumentando la rentabilidad de la flota, sin comprometer negativamente la sostenibilidad de la pesqueríaThe data presented in this paper were collected during the research project “Study of the feasibility of the development of deep shrimp fishery in the Ionian Sea (Greece) and at depths lower than 500 m using innovative bio-economic methods and cost/benefit analysis” with reference number 176441/2006 funded by the Greek Ministry for Agricultural Development and FoodPeer reviewe
Geographical and bathymetrical distribution of Aristaeomorpha foliacea and Aristeus antennatus (DECAPODA, ARISTEIDAE) in the Greek Ionian Sea
No full textEssential habitats for unexploited deep-water resources in the Ionian Sea: should they be protected areas?
No full textCatch composition on red shrimps (Aristaeomorpha foliacea and Aristeus antennatus) grounds in the Eastern Ionian Sea
No full textIn the present study, the catch composition and the catch per unit effort (CPUE) by weight and numbers in red shrimps’ (Aristaeomorpha foliacea and Aristeus antennatus) grounds was examined in the southern part of the eastern Ionian Sea, in order to collect important information for the Greek waters, where no deep- water fishery exists. In the depth stratum 500–700 m, the catch of the commercial species represented a high proportion (>70%) of the total catch. Red shrimps and several other commercial species were found in important quantities. The present results suggest the possibility of developing a deep-water fishery in Greece. In such a case, attention should be paid because of the high vulnerability of A. foliacea – the main deep-water fishing resource in the area – to the fishing pressure
That’s All I Know: Inferring the Status of Extremely Data-Limited Stocks
No full textThere is a growing number of methods to assess data-limited stocks. However, most of these methods require at least some basic data, such as commercial catches and life history information. Meanwhile, there are many commercial stocks with an even higher level of data limitation, for which the inference of stock status and the formulation of advice remain challenging. Here, we present a stepwise approach to achieve the best possible understanding of extremely data-limited stocks and facilitate their management. As a case study we use a stock of the shrimp Plesionika edwardsii (Decapoda, Pandalidae) from the eastern Mediterranean Sea, where the only available data was a sub-optimal sample of length frequencies coming from a small-scale trap fishery. We use a suite of different methods to explore and process the data, estimate the growth parameters, estimate the natural and fishing mortalities, and approximate the reference points, in order to provide a preliminary evaluation of stock status. We implement multiple methods for each step of this process, highlighting the strong and weak points of each one of them. Our approach illustrates the better insights that can be gained by applying ensembles of models, rather than a single ‘best’ model when working with limited data of poor quality. The stepwise approach we propose here is transferable to other extremely data-limited stocks to elucidate their status and inform their management. © Copyright © 2020 Pantazi, Mannini, Vasilakopoulos, Kapiris, Megalofonou and Kalogirou
EAES rapid guideline: updated systematic review, network meta-analysis, CINeMA and GRADE assessment, and evidence-informed European recommendations on the management of common bile duct stones
No full textBackground: Choledocholithiasis presents in a considerable proportion of patients with gallbladder disease. There are several management options, including preoperative or intraoperative endoscopic cholangiopancreatography (ERCP), and laparoscopic common bile duct exploration (LCBDE).
Objective: To develop evidence-informed, interdisciplinary, European recommendations on the management of common bile duct stones in the context of intact gallbladder with a clinical decision to intervene to both the gallbladder and the common bile duct stones.
Methods: We updated a systematic review and network meta-analysis of LCBDE, preoperative, intraoperative, and postoperative ERCP. We formed evidence summaries using the GRADE and the CINeMA methodology, and a panel of general surgeons, gastroenterologists, and a patient representative contributed to the development of a GRADE evidence-to-decision framework to select among multiple interventions.
Results: The panel reached unanimous consensus on the first Delphi round. We suggest LCBDE over preoperative, intraoperative, or postoperative ERCP, when surgical experience and expertise are available; intraoperative ERCP over LCBDE, preoperative or postoperative ERCP, when this is logistically feasible in a given healthcare setting; and preoperative ERCP over LCBDE or postoperative ERCP, when intraoperative ERCP is not feasible and there is insufficient experience or expertise with LCBDE (weak recommendation). The evidence summaries and decision aids are available on the platform MAGICapp ( https://app.magicapp.org/#/guideline/nJ5zyL ).
Conclusion: We developed a rapid guideline on the management of common bile duct stones in line with latest methodological standards. It can be used by healthcare professionals and other stakeholders to inform clinical and policy decisions
Feeding ecology of the deep-water blue-red shrimp Aristeus antennatus (Decapoda: Aristeidae) in the Greek Ionian Sea (E. Mediterranean)
No full textThe feeding habits of the deep-sea blue-red shrimp Aristeus antennatus were determined based on the analysis of 1047 stomach contents, sampled in the Greek Ionian Sea (E. Mediterranean). The diet of this economically and biologically important decapod was studied in relation to the season, size class and sex. The diet of A. antennatus consisted of 54 different prey categories, and belonged mainly to smaller crustaceans (e.g. natantian decapods, euphausiids, tanaidaceans), molluscs, polychaetes, chaetognaths and, to a lesser extent, fishes. The above prey categories consisted of 71-82% of the relative abundance and total occurrence for males and 61-81% for females. Females seemed to be better fed than males (stomach fullness, food quality). A. antennatus displayed a highly diversified diet and the different feeding patterns were discussed. Diet composition showed slight seasonal fluctuations. The observed slight differences on A. antennatus diet among the western, central and eastern Mediterranean could be attributed to the more oligotrophic character of the eastern part of the basin. The principal factors driving the changes in the feeding strategy of this decapod among the seasons are the increased energy demands related to sexual requirements and the food availability in the marine environment. The ontogenetic changes in the shrimp's diet were relatively clear. Larger individuals exhibited selecting prey with a good swimming capacity (e.g. fishes), while the smaller individuals consumed prey with low mobility (e.g. copepods, ostracods). © 2010 Elsevier B.V
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