scholarly journals Fish and cephalopods monitoring on the Bay of Biscay and Celtic Sea continental shelves

2021 ◽  
Author(s):  
Pascal Laffargue ◽  
Damien Delaunay ◽  
Vincent Badts ◽  
Olivier Berthele ◽  
Anne-Sophie Cornou ◽  
...  
Keyword(s):  
Demersal Fish ◽  
Sampling Effort ◽  
Depth Range ◽  
Bay Of Biscay ◽  
Essential Information ◽  
Fish Stocks ◽  
Continental Shelves ◽  
Celtic Sea ◽  
Selection Of Species ◽  
Selection Of

Abstract. The demersal fish and cephalopod communities of the continental shelves of the Bay of Biscay and the Celtic Sea have been monitored for more than 30 years by the EVHOE series of fisheries surveys. Since 1987, a total of 4247 stations have been sampled in the fall with a GOV bottom trawl in a depth range of 15 to 600 m. The main objective of these surveys is to monitor 22 benthic fish stocks and 10 cephalopods but also to provide a description of the distribution of a total of 250 fish and 50 commercial invertebrate taxa. The dataset (https://doi.org/10.17882/80041) provides abundance and biomass information by station for all observed taxa. Size distributions for a selection of species are also available. These data are part of a larger set of standardized European surveys that provide essential information for monitoring demersal communities in the Northeast Atlantic. We propose here a critical analysis of the dataset especially in terms of the evolution of the sampling effort and strategy as well as the taxonomic precision.

XIV.—Occurrence of Specific Pollutants in Fish in the Forth and Tay Estuaries

1972 ◽  
Vol 71 (2-4) ◽  
pp. 189-194
Author(s):  
A. V. Holden ◽  
G. Topping
Keyword(s):  
Coastal Waters ◽  
Pesticide Residues ◽  
Marine Pollution ◽  
Analytical Data ◽  
Demersal Fish ◽  
Organic Mercury ◽  
Sources Of Pollution ◽  
Residue Levels ◽  
Selection Of Species ◽  
Selection Of

SynopsisAlthough no particular studies have been made of pollutants in fish of the Forth and Tay estuaries, samples from these areas have been examined together with similar samples from other Scottish coastal waters, as part of a national survey of marine pollution. The contaminants investigated so far have been organochlorine compounds, including pesticide residues and polychlorinated biphenyls, mercury (including organic mercury), lead, cadmium, copper and zinc. Pelagic and demersal fish, molluscs and Crustacea have been sampled, although not all contaminants have been determined in all species.Few samples have been obtained from the upper sections of the two estuaries, but in comparison with residue levels found in other Scottish waters the species in the two areas contained concentrations little different from those considered to be normal. The selection of species and tissues for analysis, and the problems of interpretation of the analytical data, in terms of locating the sources of pollution and assessing the effects of the pollutants on fish, are discussed. More detailed surveys would be required to identify any localised areas of high contamination.

scholarly journals Soft bottom macrofauna of an All Taxa Biodiversity Site: Hornsund (77○N, Svalbard)

2010 ◽  
Vol 31 (4) ◽  
pp. 309-326 ◽  
Author(s):  
Monika Kędra ◽  
Sławomira Gromisz ◽  
Radomir Jaskuła ◽  
Joanna Legeżyńska ◽  
Barbara Maciejewska ◽  
...  
Keyword(s):  
Bottom Fauna ◽  
Sampling Effort ◽  
Biological Traits ◽  
Depth Range ◽  
Concerted Action ◽  
Soft Bottom ◽  
Species List ◽  
Biodiversity Inventory ◽  
Arctic Fjord ◽  
Large Material

Soft bottom macrofauna of an All Taxa Biodiversity Site: Hornsund (77○N, Svalbard) Hornsund, an Arctic fjord in the west coast of Spitsbergen (Svalbard), was selected as All Taxa Biodiversity Inventory (ATBI) site under EU 5th Framework Concerted Action BIOMARE (2000-2002), especially due to its pristine, undisturbed natural character. On the base of large material (89 stations located throughout the fjord and 129 Van Veen grab samples) collected during cruises of RV Oceania in July in 2002, 2003, 2005 and 2007 and literature search a comprehensive list of species recorded within Hornsund area, on the soft bottom with depth range of 30-250 m is provided. Over 220 species were identified including 93 species of Polychaeta, 62 species of Mollusca and 58 species of Crustacea. Species list is supported by information on the zoogeographical status, body length and biological traits of dominant species. Need for further research on Hornsund soft bottom fauna with more sampling effort is highlighted.

scholarly journals Prioritization and Selection of High Biomass Energy Producing Plant Species at Boset District, Central Ethiopia: An Ethnobotanical Approach 

2021 ◽  
Author(s):  
Tinsae Bahru Yifru ◽  
Berhane Kidane ◽  
Amsalu Tolessa
Keyword(s):  
Plant Species ◽  
Sustainable Use ◽  
Biomass Energy ◽  
Calotropis Procera ◽  
Sampled Data ◽  
High Biomass ◽  
Structured Interviews ◽  
Acacia Senegal ◽  
Selection Of Species ◽  
Selection Of

Abstract Background: In Ethiopia, about 92.3% of all the biomass energy is consumed by domestic households and the demand is growing from 10-14%. However, there are little/no practical experiences or documented indigenous knowledge on how traditional people identify and select high biomass producing plant species with short rotation periods at Boset District. Therefore, the present study was aimed at: (1) selecting and documenting high biomass energy producing plant species at Boset District; (2) identifying major predictor variables that influence the prioritization and selection of species; and (3) develop a Generalized Linear Model (GLM) to predict the selection of species. Methods: A total of 96 informants comprising 59 men and 37 women between the ages of 18 and 81 were sampled. Data were collected using structured interviews, guided field walk, discussions and field observations. Results: Collected data indicated that 88.5% of the informants involved in firewood collection, while 90% practiced charcoal making. A total of 1533.60 Birr per household on average was earned annually from this activity. A total of 25 firewood and/or charcoal plant species were identified and documented at Boset District. Of these, Acacia senegal, Acacia tortilis and Acacia robusta were the three best prioritized and selected indigenous high biomass producing species. Prosopis juliflora, Parthenium hysterophorus, Azadirachta indica, Calotropis procera, Cryptostegia grandiflora, Lantana camara and Senna occidentalis further grouped under introduced fuelwood species. Prediction of GLM assured sampled Kebeles and source of income generated from fuelwood species positively and significantly (p<0.001) related to selection of species. Higher efficiency to provide energy and heat; little or no smoke or soot; easier to cut and split the wood and easier availability were some of the main selection criteria. Conclusions: This study provides valuable information in selection and documenting of high biomass producing plant species for proper management and sustainable use at Boset District. The three most selected species (A. senegal, A. tortilis and A. robusta) should be further evaluated at laboratory to determine their energy values.

scholarly journals ABOUT CHANGE OF HANDWRITING OF PERSONS THAT ARE IN THE STATE OF ALCOHOLIC INTOXICATION

2020 ◽  
Vol 11 (87) ◽  
Author(s):  
Оksana Rusova ◽  
◽  
Olga Samoilova ◽  
Keyword(s):  
Careful Consideration ◽  
Essential Information ◽  
Case File ◽  
Fast Pace ◽  
Expert’S Opinion ◽  
Psychological Attitude ◽  
The Law ◽  
Object Of Study ◽  
Concomitant Factors ◽  
Selection Of

This article focuses on the problematic issues that arise in the process of appointing a forensic handwriting examination, where the object of study are manuscripts performed in a state of intoxication. The reliability of the conclusions will largely depend on the correct quality and sufficient quantity of comparative material. This will be possible if the initiator of the study, after careful consideration of their work, qualitatively selects comparative material for the study. The purpose of this article is to further improve the purpose of forensic handwriting examination, the object of which is the study of manuscripts made in a state of intoxication, as well as to provide practical recommendations that will allow the initiators of the study to correctly select comparative material. Of particular importance in the conduct of forensic handwriting diagnostic examinations are information from the case file relating to the subject of examination, ie in the resolution, decision or statement must be indicated: first, it is information about the person - the actual or intended executor of the manuscript; second, essential information relating to the situation, the situation in which the manuscript in question was presumably performed, and in connection with it, the possible psychological attitude or emotional state of the person writing. When the initiator of the study informs the expert of the necessary information, he should not be afraid to "impose" a certain version, because the method of expert research is based on checking all the most likely alternatives (versions and counter version) and making decisions based only on objective data. Regarding the selection of comparative material provided for research in establishing whether a person was intoxicated, there are some peculiarities in the selection of experimental samples, because we cannot bring a person in such a state to take the necessary samples because the law prohibits harm to health, humiliation and infliction of moral suffering. They can be obtained without violating the law, by changing the condition, namely, you need to dictate the text at an extremely fast pace. The expert may also make a request, although the initiator of the study provided comparative material such as free, conditionally free and experimental samples, because there may be concomitant factors that the initiator did not take into account when selecting, such as experimental samples. The expert's request should be treated responsibly because the quality of the expert's opinion may depend on how well it is executed.

scholarly journals Winter migration and diving behaviour of porbeagle shark, Lamna nasus, in the Northeast Atlantic

2010 ◽  
Vol 68 (1) ◽  
pp. 166-174 ◽  
Author(s):  
Ryan A. Saunders ◽  
François Royer ◽  
Maurice W. Clarke
Keyword(s):  
Spatial Ecology ◽  
Large Scale ◽  
Depth Distribution ◽  
Diving Behaviour ◽  
Depth Range ◽  
Bay Of Biscay ◽  
Night Time ◽  
Fishing Activity ◽  
Northeast Atlantic ◽  
Winter Migration

Abstract Saunders, R. A., Royer, F., and Clarke, M. W. 2011. Winter migration and diving behaviour of porbeagle shark, Lamna nasus, in the Northeast Atlantic. – ICES Journal of Marine Science, 68: 166–174. The porbeagle is one of the top marine predators in the North Atlantic. However, little is known about its biology, abundance, or spatial ecology there. Results are presented on the migration and behaviour of three porbeagles tagged with archival pop-up tags off Ireland between September 2008 and January 2009. One shark migrated >2400 km to the northwest of Morocco, residing around the Bay of Biscay for approximately 30 days. The other two remained more localized in off-shelf regions around the Celtic Sea/Bay of Biscay and off western Ireland. The sharks occupied a broad vertical depth range (0–700 m) and a relatively limited temperature range (∼9–17°C), with notable variations in diving behaviour between individual sharks. There were distinct day–night differences in depth distribution, each shark being positioned higher in the water column by night than by day. Night-time depth distribution also appeared to be driven by the lunar cycle during broad-scale migration through oceanic waters. Our results show that porbeagles occupy and traverse regions of high fishing activity where they are potentially vulnerable to population depletion. Such large-scale movement outside the ICES Area underlines the need for international coordination in their assessment and management.

scholarly journals A Comparison between Two Sonic Measuring Systems for Demersal Fish

1970 ◽  
Vol 27 (4) ◽  
pp. 737-742 ◽  
Author(s):  
R. G. Dowd ◽  
E. Bakken ◽  
O. Nakken
Keyword(s):  
Linear Relation ◽  
Demersal Fish ◽  
High Density ◽  
Measuring Systems ◽  
Fish Stocks ◽  
Digital Counter ◽  
Schooling Fish ◽  
Wide Range ◽  
Two Systems

Two sonic methods for estimation of abundance of fish stocks, the echo integrator and the digital counter methods, were compared on single and schooling fish in the Lofoten area of Norway during March 1969. Good correlation was obtained between the two systems for both situations, but the slopes of the regressions of integrated values on the digital counter differed significantly between low and high density fish concentrations. This suggests that the two systems treated the echo information differently, but nevertheless maintained a linear relation between themselves over a wide range of counts.

scholarly journals Preliminary Studies Regarding the Selection of Species and Types of Pot and Container for Vegetable Growing

2019 ◽  
Vol 76 (1) ◽  
pp. 58
Author(s):  
Mirabela GACHE (LUNGU) ◽  
Neculai MUNTEANU ◽  
Vasile STOLERU ◽  
Gabriel TELIBAN ◽  
Carmen CABA (INCULEŢ)
Keyword(s):  
Plant Growth ◽  
Growth And Development ◽  
Climatic Conditions ◽  
Selection Of Species ◽  
Choice Of Species ◽  
Selection Of

The purpose of the research reported in this paper was to evaluate the possibility of growing vegetable plants in pots and containers by optimizing the choice of species and cultivars and the type of pot or container based on the information available in the literature and on the basis of our own experience. Taking into account the purpose and objectives of this paper, the study is structured to respond to each  bjective considered. Information on crops in pot and containers shows that if the climatic conditions necessary for growth and development areoptimal, basically any vegetable species can be grown in this system (Purnell, 2007). Concerning the pots in which vegetable plants can be grown, they are diverse and may be chosen specifically for this type of culture or can be assigned to provide the space necessary for plant growth for different species.

scholarly journals Variability in the air–sea interaction patterns and timescales within the south-eastern Bay of Biscay, as observed by HF radar data

Ocean Science ◽  
2013 ◽  
Vol 9 (2) ◽  
pp. 399-410 ◽  
Author(s):  
A. Fontán ◽  
G. Esnaola ◽  
J. Sáenz ◽  
M. González
Keyword(s):  
Radar Data ◽  
Hf Radar ◽  
Bay Of Biscay ◽  
Interaction Patterns ◽  
The South ◽  
South Eastern ◽  
Continental Shelves ◽  
Surface Circulation ◽  
Spatial Coverage ◽  
Current Interaction

Abstract. Two high-frequency (HF) radar stations were installed on the coast of the south-eastern Bay of Biscay in 2009, providing high spatial and temporal resolution and large spatial coverage of currents in the area for the first time. This has made it possible to quantitatively assess the air–sea interaction patterns and timescales for the period 2009–2010. The analysis was conducted using the Barnett–Preisendorfer approach to canonical correlation analysis (CCA) of reanalysis surface winds and HF radar-derived surface currents. The CCA yields two canonical patterns: the first wind–current interaction pattern corresponds to the classical Ekman drift at the sea surface, whilst the second describes an anticyclonic/cyclonic surface circulation. The results obtained demonstrate that local winds play an important role in driving the upper water circulation. The wind–current interaction timescales are mainly related to diurnal breezes and synoptic variability. In particular, the breezes force diurnal currents in waters of the continental shelf and slope of the south-eastern Bay. It is concluded that the breezes may force diurnal currents over considerably wider areas than that covered by the HF radar, considering that the northern and southern continental shelves of the Bay exhibit stronger diurnal than annual wind amplitudes.

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