Potential effects of bycatch from the squat lobster fisheries in central Chile on the benthic ecosystem: a survey data approach

2020 ◽  
Vol 71 (10) ◽  
pp. 1281
Author(s):  
José T. Montero ◽  
Andres Flores ◽  
Dante Queirolo ◽  
Ariel Farias ◽  
Rodrigo Wiff ◽  
...  
Keyword(s):  
Benthic Communities ◽  
Potential Interaction ◽  
Survey Method ◽  
Benthic Species ◽  
Central Chile ◽  
Squat Lobster ◽  
The Past ◽  
Suitability Maps ◽  
Resource Status ◽  
Trawl Fisheries

In Chile, bottom trawling for squat lobsters is one of the most important crustacean fisheries. The fishery has been monitored for the past 15 years to assess the resource status, spatial distribution and effects on benthic species. Understanding the interactions of fishing and non-fishing activities with the benthic communities is of critical importance to estimate the potential bycatch of important economic species from fishing operations and to determine adequate spatial and temporal fishing bans. In this study we characterised the community of the main non-target species caught during historical squat lobster biomass surveys from 2000 to 2015 and interpreted the species included as potential bycatch of the fishery. Four ecological assemblages were found that differed in abundance but not in species richness, which suggests that the community structures did not differ among the areas, but rather in the relative abundances of the species. In addition, we created habitat suitability maps for the groups identified and discuss the effects of the environment and the survey method on the distribution of the groups. Managers can use this information to detect regions with high bycatch risk for demersal trawl fisheries and understand the potential interaction of fishing operations with the environment.

scholarly journals Historical discarding in Mediterranean fisheries: a fishers' perception

2015 ◽  
Vol 72 (9) ◽  
pp. 2600-2608 ◽  
Author(s):  
Dimitrios Damalas ◽  
Christos D. Maravelias ◽  
Giacomo C. Osio ◽  
Francesc Maynou ◽  
Mario Sbrana ◽  
...  
Keyword(s):  
Species Composition ◽  
Market Demand ◽  
Sampling Protocol ◽  
The Past ◽  
Regulatory Constraints ◽  
Fishing Strategies ◽  
Commercially Important ◽  
Trawl Fisheries ◽  
Important Fish

Abstract Discarding of commercially important fish species in the bottom trawl fisheries in the northern Mediterranean Sea was investigated by soliciting the long-term recollections of fishers engaged or formerly engaged in such fisheries. The main aim of our investigation was to describe the prevalence of discarding and its evolution over the past 70 years using information gathered through individual questionnaire-based interviews with fishers from ports in Spain, Italy, and Greece, following a standardized sampling protocol. Although it proved impossible to derive absolute estimates of the volume of discarded catches over the period investigated, we conclude that over the past 70 years, discarding as a practice has gradually increased in the northern Mediterranean trawl fisheries and has been accompanied by a shift in the species composition of the discarded catch. While discarding can occur for a number of reasons, our investigations indicate that discarding in the past was mostly driven by market demand, but recent legal and regulatory constraints have led to changes in fishing strategies and became a significant reason for discards.

Seasonal deposition of phytodetritus to the deep-sea floor

1986 ◽  
Vol 88 ◽  
pp. 265-279 ◽  
Author(s):  
A. L. Rice ◽  
D. S. M. Billett ◽  
J. Fry ◽  
A. W. G. John ◽  
R. S. Lampitt ◽  
...  
Keyword(s):  
Deep Sea ◽  
Benthic Communities ◽  
Time Lapse ◽  
Sediment Traps ◽  
Temporal Variations ◽  
Sea Floor ◽  
Porcupine Seabight ◽  
The Past ◽  
Sea Bed ◽  
Seasonal Deposition

SynopsisEvidence has accumulated over the past twenty years to suggest that the deep-sea environment is not as constant as was at one time thought, but exhibits temporal variations related to the seasonally in the overlying surface waters. Recent results from deep-moored sediment traps suggest that this coupling is mediated through the sedimentation of organic material, while observations in the Porcupine Seabight indicate that in this region, at least, there is a major and rapid seasonal deposition of aggregated phytodetritus to the sea-floor at slope and abyssal depths.This paper summarises the results of the Porcupine Seabight studies over the past five years or so, using time-lapse sea-bed photography and microscopic, microbiological and chemical analyses of samples of phytodetritus and of the underlying sediment. The data are to some extent equivocal, but they suggest that the seasonal deposition is a regular and dramatic phenomenon and that the material undergoes relatively little degradation during its passage through the water column. The mechanisms leading to the aggregation of the phytodetritus have not been identified, and it is not yet known whether the phenomenon is geographically widespread nor whether it is of significance to the deep-living mid-water and benthic communities.

scholarly journals PROSPEK PENGEMBANGAN PALA RAKYAT DI PROVINSI LAMPUNG

2019 ◽  
Vol 7 (1) ◽  
pp. 14
Author(s):  
Fitri Yuni Lestari ◽  
Raden Hanung Ismono ◽  
Fembriarti Erry Prasmatiwi
Keyword(s):  
Arima Model ◽  
Secondary Data ◽  
Simple Random Sampling ◽  
Development Prospect ◽  
Primary Data ◽  
Survey Method ◽  
The Past ◽  
Interview Technique ◽  
Financial Feasibility ◽  
Good Potential

The research aimed to analyze financial feasibility and development prospect of nutmeg farming in Lampung Province.  This research was conducted in Gisting Subdistrict of Tanggamus Regency in which data was collected in September 2017 until October 2017 by survey method.  This research used primary and secondary data.  Primary data was used to answer financial feasibility analyze purpose and obtained by interview technique using questionnaires.  Secondary data in the past seven to night years was used to answer the purpose of prospect development of nutmeg farming.  The samples size of this research was 30 nutmeg farmers using simple random sampling.  The data was analyzed by financial feasibility and time series linier with ARIMA model.  The results of the study showed that the nutmeg farming was feasible, and development prospect of nutmeg farming based on production and nutmeg seeds export had a good potential for the future. Key words: ARIMA, development, financial, nutmeg, prospect

scholarly journals Late Holocene summer temperatures in the central Andes reconstructed from the sediments of high-elevation Laguna Chepical, Chile (32° S)

2013 ◽  
Vol 9 (3) ◽  
pp. 2277-2308
Author(s):  
R. de Jong ◽  
L. von Gunten ◽  
A. Maldonado ◽  
M. Grosjean
Keyword(s):  
Climate Change ◽  
South America ◽  
Temperature Reconstruction ◽  
High Elevation ◽  
Ice Age ◽  
Central Chile ◽  
Southern South America ◽  
Calibration Period ◽  
The Past ◽  
Insight Into

Abstract. High-resolution reconstructions of climate variability that cover the past millennia are necessary to improve the understanding of natural and anthropogenic climate change across the globe. Although numerous records are available for the mid- and high-latitudes of the Northern Hemisphere, global assessments are still compromised by the scarcity of data from the Southern Hemisphere. This is particularly the case for the tropical and subtropical areas. In addition, high elevation sites in the South American Andes may provide insight into the vertical structure of climate change in the mid-troposphere. This study presents a 3000 yr long austral summer (November to February) temperature reconstruction derived from the 210Pb and 14C dated organic sediments of Laguna Chepical (32°16' S/70°30' W, 3050 m a.s.l.), a high-elevation glacial lake in the subtropical Andes of central Chile. Scanning reflectance spectroscopy in the visible light range provided the spectral index R570/R630, which reflects the clay mineral content in lake sediments. For the calibration period (AD 1901–2006), the R570/R630 data were regressed against monthly meteorological reanalysis data, showing that this proxy was strongly and significantly correlated with mean summer (NDJF) temperatures (R3yr = −0.63, padj = 0.01). This calibration model was used to make a quantitative temperature reconstruction back to 1000 BC. The reconstruction (with a model error RMSEPboot of 0.33 °C) shows that the warmest decades of the past 3000 yr occurred during the calibration period. The 19th century (end of the Little Ice Age (LIA)) was cool. The prominent warmth reconstructed for the 18th century, which was also observed in other records from this area, seems systematic for subtropical and southern South America but remains difficult to explain. Except for this warm period, the LIA was generally characterized by cool summers. Back to AD 1400, the results from this study compare remarkably well to low altitude records from the Chilean Central Valley and Southern South America. However, the reconstruction from Laguna Chepical does not show a warm Medieval Climate Anomaly during the 12–13th century, which is consistent with records from tropical South America. The Chepical record also indicates substantial cooling prior to 800 BC. This coincides with well-known regional as well as global glacier advances which have been attributed to a grand solar minimum. This study thus provides insight into the climatic drivers and temperature patterns in a region for which currently very few data are available. It also shows that since ca AD 1400, long term temperature patterns were generally similar at low and high altitudes in central Chile.

scholarly journals The Effect of E-Service Quality and Brand Image Toward Netflix Customer Loyalty through Customer Satisfaction

2021 ◽  
Vol 5 (1) ◽  
pp. 17-29
Author(s):  
Haura Kurniati ◽  
◽  
Agung Kresnamurti Rivai Prabumenang ◽  
Shandy Aditya ◽  
◽  
...  
Keyword(s):  
Customer Satisfaction ◽  
Service Quality ◽  
Customer Loyalty ◽  
Structural Equation ◽  
Quantitative Method ◽  
Brand Image ◽  
Equation Model ◽  
Research Data ◽  
Survey Method ◽  
The Past

This research aims to determine the effect of e-service quality and brand image on customer satisfaction and customer loyalty towards Netflix’s user. This research uses quantitative method and the data collection use survey method with questionnaires as the instrument. The sample of this research is 200 respondents who live in DKI Jakarta and have used Netflix in the past 6 months. Data were analyzed using software SPSS version 25 and SEM (Structural Equation Model) from Lisrel 8.8 to process and analyze the research data. The result of hypothesis testing shows that e-service quality has significant effect on customer satisfaction, but not on customer loyalty. However, e-service quality has significant effect on customer loyalty through customer satisfaction. The result also found that brand image has significant effect on both customer satisfaction and customer loyalty. And customer satisfaction has the most influence on customer loyalty

scholarly journals EFFECT OF COVID-19 LOCKDOWN ON KERALA’S JOB MARKET

2020 ◽  
Author(s):  
Adil Ellikkal ◽  
S Rajamohan
Keyword(s):  
Mortality Rate ◽  
Job Loss ◽  
Nipah Virus ◽  
Demographic Characteristics ◽  
Survey Method ◽  
Job Market ◽  
The Past ◽  
The World ◽  
World Survey ◽  
Insight Into

The COVID-19 outbreak is an exact reminder that pandemic like other rarely occurring disasters have happened in the past and will continue to happen in the future. Around the globe, countries are in lockdown, and citizens are asked to maintain social distancing and stay at home. This is not first instances that Kerala is fighting against a deadly virus like Coronavirus. Earlier in 2018, Nipah virus had been identified in Kerala and they had mortality rate of 40 to 80 per cent. From previous experience, among all the states in India, Kerala was well and the best prepared to tackle the COVID-19 pandemic and has managed to flatten the curve. But COVID-19 hit Kerala very hard, because the major source of revenue comes from tourism and Non-Resident Keralites (NRK’s) remittance drastically fell down. This paper provides vital insight into the effect on COVID-19 on Kerala’s job market. The aim of this study is to find out how Kerala’s job markets are being affected by the COVID-19 pandemic. Since Malayalees are working in different countries across the world, survey method is used to collect data. The study helps us to understand the demographic characteristics of workforce in Kerala. It clearly discusses effect of COVID-19 on different sectors where of Malayalees work across the world. The study also helps to analyze the effect of COVID-19 on employability of graduates and non-graduates. Finally, this study identifies the rate of job loss due to COVID-19 lockdown during the month of June 2020.

The Use of Social Networks in Achieving e-Democracy in the Arab Spring Countries

2016 ◽  
Vol 8 (2) ◽  
pp. 17-33
Author(s):  
Hany Abdelghaffar ◽  
Lobna Hassan
Keyword(s):  
Decision Making ◽  
Social Networks ◽  
Research Question ◽  
Survey Method ◽  
The Past ◽  
Electronic Democracy ◽  
Proposed Model ◽  
Information And Communication ◽  
The Government ◽  
The Arab Spring

Electronic democracy (e-democracy) is a way to engage citizens and politicians with their government through the use of Information and Communication Technology (ICTs) tools. Although the concept of e-democracy has been growing during the past years, few studies have examined how to achieve success of e-democracy via social networks. This research is answering the following question: How social networks support the local government decision making to enhance e-democracy? To answer the research question, a proposed model was introduced and a survey method was employed. Findings showed that governments could use social networks to facilitate awareness of information among citizens and support citizens in building their communities. Furthermore, social networks would help to facilitate deliberation among citizens. However, this should be supported with appropriate level of involvements from the government side in the discussion to provide support. Through this, governments could enhance their decision making.

scholarly journals Benthic communities under anthropogenic pressure show resilience across the Quaternary

2017 ◽  
Vol 4 (9) ◽  
pp. 170796 ◽  
Author(s):  
Julieta C. Martinelli ◽  
Luis P. Soto ◽  
Jorge González ◽  
Marcelo M. Rivadeneira
Keyword(s):  
Management Practices ◽  
Benthic Communities ◽  
Anthropogenic Factors ◽  
Anthropogenic Pressure ◽  
North Central ◽  
Central Chile ◽  
Species Abundances ◽  
Mollusc Species ◽  
Evenness Indices ◽  
Benthic Resources

The Southeast Pacific is characterized by rich upwelling systems that have sustained and been impacted by human groups for at least 12 ka. Recent fishing and aquaculture practices have put a strain on productive coastal ecosystems from Tongoy Bay, in north-central Chile. We use a temporal baseline to determine whether potential changes to community structure and composition over time are due to anthropogenic factors, natural climatic variations or both. We compiled a database ( n  = 33 194) with mollusc species abundances from the Mid-Pleistocene, Late Pleistocene, Holocene, dead shell assemblages and live-sampled communities. Species richness was not significantly different, neither were diversity and evenness indices nor rank abundance distributions. There is, however, an increase in relative abundance for the cultured scallop Argopecten , while the previously dominant clam Mulinia is locally very rare. Results suggest that impacts from both natural and anthropogenic stressors need to be better understood if benthic resources are to be preserved. These findings provide the first Pleistocene temporal baseline for the south Pacific that shows that this highly productive system has had the ability to recover from past alterations, suggesting that if monitoring and management practices continue to be implemented, moderately exploited communities from today have hopes for recovery.

scholarly journals Satire as Tool of Political Cartoons in the Nigerian National Dailies: A Critical Discourse Analysis

2016 ◽  
Vol 12 (29) ◽  
pp. 124
Author(s):  
Usman Salisu Ogbo ◽  
MomohTairu Nuhu
Keyword(s):  
Discourse Analysis ◽  
Critical Discourse Analysis ◽  
Research Design ◽  
Citizen Participation ◽  
Critical Discourse ◽  
Survey Method ◽  
Political Cartoons ◽  
Political Issues ◽  
The Past ◽  
Political Failure

This work is an analysis of the use of satire as a form of imagery to depict some political issues in cartoons as featured in the Nigerian national dailies. Survey method of research design was adopted as a means of sampling copies of national dailies from which political cartoons were selected, while Critical Discourse Analysis (CDA) was adopted for the analysis of data gathered. Findings reveal images of corruption, official responsibility, political failure and brutality/cruelty/suffering as the dominant concerns of the cartoons featured by the papers. While the corrupt postures of those who have links with the past government are dominant in the image of corruption portrayed, both those in and out of government are subjected to some satiric expose in respect of official responsibility, failure in politics and brutality/cruelty/suffering. At the end, it is recommended, among others, that more searchlight should be focused on the corrupt tendency of those still in power, and that more research efforts be devoted to the use of political cartoons to encourage citizen participation in national discourse.

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