An analysis based on trawl-survey data of the state of the ‘Italian’ stock of Mullus barbatus in the Sicilian Channel, including management advice

The clinical examination of condition of tissues prosthetic bed was conducted in 20 patients with pemphigus vulgaris. The results are compared with survey data of 20 persons of control group without somatic pathology. It was conducted the analyzes of subjective and objective assessment of tissues prosthetic bed, the results of clinical examination and frequency of various pathologies of the oral mucosa membrane in the studied groups, conducted the comparative evaluation of dental indicators.

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Mosquito Longevity, Vector Capacity, and Malaria Incidence in West Timor and Central Java, Indonesia

ISRN Public Health ◽

10.5402/2012/143863 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

Ermi Ndoen ◽

Clyde Wild ◽

Pat Dale ◽

Neil Sipe ◽

Mike Dale

Keyword(s):

Malaria Transmission ◽

Survey Data ◽

Malaria Incidence ◽

The State ◽

Physiological Age ◽

Anopheline Mosquito ◽

The West ◽

Central Java ◽

Vector Capacity ◽

West Timor

The aim of this paper was to relate anopheline mosquito longevity to malaria incidence in two areas in Indonesia: West Timor and Central Java. We estimated the physiological age of females captured landing on humans or resting inside and outside buildings. The estimate was based on the state of the ovaries and was used to estimate longevity. The results showed that there were large differences between the two areas surveyed. In West Timor the longevity of the anophelines ranged from 13 to 23 days, sufficient for completing the intrinsic incubation cycle and for malaria transmission, whereas in Central Java the longevity was only 3 days, insufficient both for incubation and for transmission. We concluded that the West Timor study area had a greater risk of malaria transmission than that of Central Java and this was supported by village survey data that showed greater malaria incidence in West Timor than in Central Java.

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Selecting MPAs to conserve groundfish biodiversity: the consequences of failing to account for catchability in survey trawls

ICES Journal of Marine Science ◽

10.1093/icesjms/fsn181 ◽

2008 ◽

Vol 66 (1) ◽

pp. 82-89 ◽

Cited By ~ 5

Author(s):

Helen M. Fraser ◽

S. P. R. Greenstreet ◽

Gerjan J. Piet

Keyword(s):

Species Diversity ◽

Survey Data ◽

North Sea ◽

Marine Protected Areas ◽

Fishing Effort ◽

Trawl Survey ◽

Fishing Activity ◽

Diversity Issues ◽

Species Specific ◽

Fish Species Diversity

Abstract Fraser, H. M., Greenstreet, S. P. R., and Piet, G. J. 2009. Selecting MPAs to conserve groundfish biodiversity: the consequences of failing to account for catchability in survey trawls. – ICES Journal of Marine Science, 66: 82–89. Fishing has affected North Sea groundfish species diversity. Defining Marine Protected Areas (MPAs) to address this will rely on groundfish surveys. Species-specific catch efficiencies vary between trawl gears, and apparent species diversity distributions are influenced by the type of gear used in each survey. It may be that no single survey depicts actual diversity distributions. Two MPA scenarios designed to protect groundfish species diversity are described, the first based on unadjusted International Bottom Trawl Survey data and the second based on the same data adjusted to take account of catchability. Spatial overlap between these scenarios is low. Assuming that the adjusted data best describe the actual species diversity distribution, the level of diversity safeguarded by MPAs, based on unadjusted data, is determined. A fishing effort redistribution model is used to estimate the increase in fishing activity that is likely to occur in MPAs that take catchability into account, if closed areas based solely on the unadjusted groundfish data were implemented. Our results highlight the need to take survey-gear catchability into account when designating MPAs to address fish-species diversity issues.

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Assessment of the State of Ethnic-Specific Health Survey Data

AAPI Nexus Policy Practice and Community ◽

10.17953/appc.5.1.t038l2407w11624j ◽

2007 ◽

Vol 5 (1) ◽

pp. 97-116

Author(s):

Nadereh Pourat ◽

Ninez Ponce ◽

Roberta Wyn

Keyword(s):

Survey Data ◽

Health Survey ◽

The State ◽

Health Survey Data ◽

Specific Health

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Management options for the Blackwater herring, a local spring-spawning stock in the Thames Estuary

ICES Journal of Marine Science ◽

10.1016/j.icesjms.2004.02.001 ◽

2004 ◽

Vol 61 (3) ◽

pp. 297-307 ◽

Cited By ~ 13

Author(s):

Beatriz A. Roel ◽

Carl M. O'Brien ◽

Marinelle Basson

Keyword(s):

Fishing Effort ◽

Current Approach ◽

Slight Reduction ◽

Trawl Survey ◽

Management Options ◽

Fishing Season ◽

Thames Estuary ◽

Spawning Stock ◽

Management Advice ◽

The Impact

Abstract Herring caught in the Thames Estuary sustain a small local commercial fishery (peak catch of 606 t during the 1972–1973 fishing season). Loss of local consumers' interest in the herring product has resulted in a gradual decline in catches and fishing effort for the stock. The stock is assessed using an age-structured model that relies on the information provided by a scientific trawl survey, and management advice is provided before the fishing season starts in October. Given its current low economic value, managers have requested evaluation of options for multi-annual Total Allowable Catches (TACs) in an attempt to reduce the frequency (and costs) of assessment and associated management advice. A tentative relationship between sea surface temperature and recruitment is used to predict the impact of increasing sea temperatures on future recruitment in the context of global warming. Hypotheses of auto-correlation and of an environmental effect on recruitment, together with trends in weight-at-age and the overestimation of spawning-stock biomass, form the basis for sensitivity tests of the management options considered. Implementation of a 3-year fixed TAC with 40% constraint in TAC variability and a slight reduction in target F would seem appropriate for the stock, given that it is within safe biological limits and compares well in terms of yield and risk with the current approach of annual TAC revision.

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Validation of deep-sea coral and sponge distribution models in the Aleutian Islands, Alaska

ICES Journal of Marine Science ◽

10.1093/icesjms/fsx087 ◽

2017 ◽

Vol 75 (1) ◽

pp. 199-209 ◽

Cited By ~ 8

Author(s):

Christopher N Rooper ◽

Rachel Wilborn ◽

Pamela Goddard ◽

Kresimir Williams ◽

Richard Towler ◽

...

Keyword(s):

Survey Data ◽

Deep Sea ◽

Goodness Of Fit ◽

Bottom Trawl ◽

Aleutian Islands ◽

Trawl Survey ◽

Bottom Trawl Survey ◽

Spatial Management ◽

Model Predictions ◽

Deep Sea Corals

Abstract Spatial management of vulnerable benthic ecosystem components such as deep-sea corals and sponges requires adequate maps of their distribution. These maps are often based on statistical models of survey data. The objective of this project was to validate the predictions of existing presence or absence and abundance models of deep-sea corals and sponges in the Aleutian Islands that were based on bottom trawl survey data. Model validation was conducted by comparing bottom trawl survey model predictions to the observations of an in situ camera survey conducted at randomly selected locations. The measures of goodness of fit (area-under-the-receiver-operator-curve, AUC) for the bottom trawl survey model predictions of camera survey observations ranged from 0.59 to 0.77 (for sponges and coral, respectively) and indicated that the bottom trawl survey models predicted the probability of presence for corals accurately across the Aleutian Islands. The bottom trawl survey models explained as little as 3% of the variability in Stylasteridae density and up to 17% of the variability in coral density. These results indicate that models of deep-sea coral distributions based on presence and absence data from bottom trawl surveys can be accurate and can provide useful information for spatial management of these vulnerable taxa. However, for some other taxa, such as sponges, care should be taken interpreting the results of bottom trawl survey models. An interesting finding of this study was that the residuals from the bottom trawl survey model-camera density relationships were negative in areas that remained open to fishing after 2005, possibly indicating an effect of continued bottom trawling on the abundance of corals in these areas. This study highlights the importance of validating models of species distribution using independent surveys, so that the results can be used with confidence to support decision-making processes.

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Bayesian spatial multispecies modelling to assess pelagic fish stocks from acoustic- and trawl-survey data

ICES Journal of Marine Science ◽

10.1093/icesjms/fsr183 ◽

2012 ◽

Vol 69 (1) ◽

pp. 95-104 ◽

Cited By ~ 8

Author(s):

Teppo Juntunen ◽

Jarno Vanhatalo ◽

Heikki Peltonen ◽

Samu Mäntyniemi

Keyword(s):

Spatial Distribution ◽

Survey Data ◽

Spatial Model ◽

Pelagic Fish ◽

Clupea Harengus ◽

Environmental Data ◽

Total Biomass ◽

Trawl Survey ◽

Linear Predictor ◽

Fish Stocks

Abstract Juntunen, T., Vanhatalo, J., Peltonen, H., and Mäntyniemi, S. 2012. Bayesian spatial multispecies modelling to assess pelagic fish stocks from acoustic- and trawl-survey data. – ICES Journal of Marine Science, 69: 95–104. A Bayesian spatial model was constructed to estimate the abundance of multiple fish species in a pelagic environment. Acoustic- and trawl-survey data were combined with environmental data to predict the spatial distribution of (i) the acoustic backscattering of fish, (ii) the relative proportion of each species, and (iii) their mean length in the Gulf of Finland in the northeastern Baltic Sea. By combining the three spatial model layers, the spatial distribution of the biomass of each species was estimated. The model consists of a linear predictor on environmental variables and a spatial random effect given by a Gaussian process. A Bayesian approach is a natural choice for the task because it provides a theoretically justified means of summarizing the uncertainties from various model layers. In the study area, three species dominate pelagic waters: sprat (Sprattus sprattus), herring (Clupea harengus), and three-spined stickleback (Gasterosteus aculeatus). Results are presented for each model layer and for estimated total biomass for each species in 2 × 2 km lattices. The posterior mean and central 95% credible intervals of total biomass were sprat 45.7 kt (27.7–71.6), herring 24.6 kt (9.7–41.3), and three-spined stickleback 1.9 kt (0.9–3.2).

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Recurrent Group Analysis of Species Assemblages of Demersal Fish in the Gulf of Guinea

Journal of the Fisheries Research Board of Canada ◽

10.1139/f68-123 ◽

1968 ◽

Vol 25 (7) ◽

pp. 1405-1421 ◽

Cited By ~ 34

Author(s):

E. W. Fager ◽

A. R. Longhurst

Keyword(s):

Survey Data ◽

Computer Analysis ◽

Group Analysis ◽

Demersal Fish ◽

Species Assemblages ◽

Trawl Survey ◽

Wide Sense ◽

Subjective Analysis ◽

Major Species ◽

Species Groups

Recurrent species groups were formed by computer analysis from the data on occurrence of demersal fish at 480 trawl stations in the tropical eastern Atlantic; these recurrent groups were then marshalled into a small number of major species assemblages, or communities in the wide sense, on the basis of intergroup relationships. These assemblages proved to be remarkably similar in composition and ecology to the communities of demersal fish recognized earlier by a number of authors from their subjective analysis of trawling survey data in this region. The computer analysis provided finer detail on both the structure and distribution of the assemblages and their constituent groups. This confirmation of the reality of the subjectively recognized communities suggests (1) that the recognition of such assemblages by subjective methods has a place in the assessment of multispecies fish resources but (2) that where the method is practicable, the machine processing of recurrent species groups in the analysis of trawl survey data can be a valuable tool in resource evaluation.

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