Genetic evaluation of the unknown contribution of stocked fish in angler catches: a case study using Mulloway Argyrosomus japonicus

2021 ◽  
Author(s):  
Matthew D Taylor ◽  
HKA Premachandra ◽  
David A Hurwood ◽  
Sudath T Dammannagoda ◽  
King Hang Chan ◽  
...  
Keyword(s):  
Microsatellite Loci ◽  
Monitoring Program ◽  
Stock Enhancement ◽  
Genetic Evaluation ◽  
Wild Populations ◽  
Sampling Program ◽  
Mixed Populations ◽  
And Migration

Stock enhancement involves the augmentation of wild populations with hatchery-reared recruits. Stock enhancement generally also includes a postrelease monitoring program which tracks stocked individuals within the fishery, and this relies on having a means to identify the likely origin of recaptured fish (e.g., physical, otolith, or genetic tags). This study reports the application of sibship analysis to retrospectively infer the origin of Mulloway (Argyrosomus japonicus) within stocked estuaries, when other means of identification were not available. Eight cohorts of Mulloway were stocked into two estuaries, across a seven-year period, but only some of the fish released during the program were physically marked with chemical otolith stains. Fish were sampled from stocked estuaries (mostly through an angler-based sampling program) and genotyped for six microsatellite loci, alongside 129 fish sampled from nonstocked estuaries. The presence of multiple sibs within the mixed populations in stocked estuaries was used to infer the origin of captured fish, against a background of sibship for known-origin individuals (verified by otolith marks) and sibship levels within unstocked estuaries. The analysis suggested hatchery-reared fish could have contributed 9% of individuals sampled from the augmented populations (7% when corrected for background sibship). The proportion of fish inferred to be of hatchery origin decreased with size (likely due to mortality and migration), and the expected contribution rates for hatchery-reared fish differed among cohorts. The results highlight that sibship analysis may be useful for retrospective genetic evaluation of stocked estuaries.

scholarly journals Social Media in and Around a Temporary Large-Scale Refugee Shelter in the Netherlands

2021 ◽  
Vol 7 (2) ◽  
pp. 205630512110249
Author(s):  
Peer Smets ◽  
Younes Younes ◽  
Marinka Dohmen ◽  
Kees Boersma ◽  
Lenie Brouwer
Keyword(s):  
Social Media ◽  
The Netherlands ◽  
Crisis Communication ◽  
Asylum Seekers ◽  
Large Scale ◽  
State Policies ◽  
Refugee Crisis ◽  
Top Down ◽  
And Migration

During the 2015 refugee crisis in Europe, temporary refugee shelters arose in the Netherlands to shelter the large influx of asylum seekers. The largest shelter was located in the eastern part of the country. This shelter, where tents housed nearly 3,000 asylum seekers, was managed with a firm top-down approach. However, many residents of the shelter—mainly Syrians and Eritreans—developed horizontal relations with the local receiving society, using social media to establish contact and exchange services and goods. This case study shows how various types of crisis communication played a role and how the different worlds came together. Connectivity is discussed in relation to inclusion, based on resilient (non-)humanitarian approaches that link society with social media. Moreover, we argue that the refugee crisis can be better understood by looking through the lens of connectivity, practices, and migration infrastructure instead of focusing only on state policies.

scholarly journals A case study of a conservation flagship species: the monarch butterfly

2021 ◽  
Author(s):  
Stephanie D. Preston ◽  
Julia D. Liao ◽  
Theodore P. Toombs ◽  
Rainer Romero-Canyas ◽  
Julia Speiser ◽  
...  
Keyword(s):  
Mixed Methods ◽  
Empirical Study ◽  
Positive Emotions ◽  
Monarch Butterfly ◽  
Mixed Methods Study ◽  
Flagship Species ◽  
Mass Migration ◽  
Tests Of Association ◽  
And Migration

AbstractWhat makes a flagship species effective in engaging conservation donors? Large, charismatic mammals are typically selected as ambassadors, but a few studies suggest butterflies—and monarchs in particular—may be even more appealing. To gather more information about people’s responses to monarchs, we conducted an empirical study of member submissions to a successful conservation campaign, the Monarch Story Campaign, conducted by the Environmental Defense Fund (EDF). The set of 691 stories along with their associated demographic and donation data was analyzed in a mixed-methods study using qualitative analysis and tests of association. The results showed that people often described encounters with monarchs in childhood and as adults. They expressed strong, positive emotions, and lauded the monarch’s beauty and other “awe-inspiring” qualities and expressed wonder at their lifecycle (i.e., metamorphosis and migration). They also raised conservation themes of distress at monarch loss, calls for action, and caretaking, such as being “fragile” and “in need.” Sharing personal encounters was associated with current efforts to save the species and more past financial donations, while a second pattern tied more donations to awe at the monarch’s mass migration. These results imply that conservation campaigns built around species people encounter may build lifelong awareness, concern, and actions towards conservation.

Linking Coastal Disasters and Migration: A Case Study of Kutubdia Island, Bangladesh

2014 ◽  
Vol 67 (2) ◽  
pp. 218-228 ◽  
Author(s):  
Munshi Khaledur Rahman ◽  
Bimal Kanti Paul ◽  
Andrew Curtis ◽  
Thomas W. Schmidlin
Keyword(s):  
And Migration

Design and performance of deep well dewatering: a case study

1998 ◽  
Vol 35 (1) ◽  
pp. 81-95 ◽  
Author(s):  
D W Sargent ◽  
R D Beckie ◽  
G Smith
Keyword(s):  
Soil Mechanics ◽  
Data Gathering ◽  
Monitoring Program ◽  
Treatment Plant ◽  
Pumping Test ◽  
Observational Method ◽  
Design Development ◽  
Deep Well ◽  
And Performance

This paper reviews the process used to design the construction dewatering system at the Influent Pumping Station at Annacis Island Wastewater Treatment Plant. The design process followed the "observational method," as applied to soil mechanics by K. Terzaghi and set out by R.B. Peck in the Ninth Rankine Lecture. The design was based on a working hypothesis of behaviour anticipated under the most probable conditions identified in the data gathering and assessment program. The sensitivity of the design was evaluated by considering potentially unfavourable conditions evident in the available data. The design development included a review of monitoring feedback obtained during the pumping-well installation, a pumping test, and the dewatering system start-up. The monitoring program and review process are presented.Key words: dewatering, observational method, case study, pumping test.

scholarly journals Rethink about Heritage Language Learning: A Case Study of Children’s Mandarin Chinese learning at a Community Language School in Ontario, Canada

2017 ◽  
Vol 19 (1) ◽  
pp. 4 ◽  
Author(s):  
Xiaoxiao Du
Keyword(s):  
Language Learning ◽  
Teaching And Learning ◽  
Heritage Language ◽  
Literacy Learning ◽  
Daily Basis ◽  
Knowledge Mobilization ◽  
Heritage Language Learning ◽  
Children's Literacy ◽  
And Migration

On-going knowledge mobilization and migration take place on a daily basis in the globalized world. Canada is a multilingual and multicultural country with a large number of visitors and immigrants. One in five Canadian speaks a foreign language other than English and French (Postmedia News, 2012). This case study examined six-year-old Chinese children’s heritage language learning in a community school from multiliteracies perspective using observations, interviews, and artefacts to understand children’s literacy learning. The findings indicated that Chinese children’s literacy learning was not in the traditional repetitive way but involved multimodal communication at school. Useful implications are made for heritage language educators regarding ways to support meaningful heritage language teaching and learning.  

scholarly journals Genetic variability of marine shrimp in the Brazilian industry

2013 ◽  
Vol 48 (8) ◽  
pp. 968-974 ◽  
Author(s):  
Rodrigo Maggioni ◽  
Maria Raquel Moura Coimbra ◽  
Raimundo Bezerra da Costa ◽  
Fábio Mendonça Diniz ◽  
Wagner Franco Molina ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Central America ◽  
Microsatellite Loci ◽  
Geographical Location ◽  
Genetic Distances ◽  
Wild Populations ◽  
Marine Shrimp ◽  
Variability Level ◽  
Recent Origin ◽  
Polymorphic Microsatellite

The objective of this work was to estimate the genetic variability level and distribution in Brazilian broodstocks of marine shrimp (Litopenaeus vannamei). Nine of the country's largest hatcheries were evaluated using codominant and highly polymorphic microsatellite markers. The results obtained from genotyping of ten microsatellite loci are indicative of genetic variability that is compatible with that found in wild populations of L. vannamei in Mexico and Central America. A possible explanation is the highly diversified and relatively recent origin of the available broodstocks. Bayesian analysis detected a signal for five founding populations. The distribution of genetic distances partially reflects geographical location, and this information will be useful for the creation of new broodstocks. Therefore, L. vannamei genetic variability among nine of the largest national hatcheries can be considered high.

scholarly journals An Evaluation of Impacts of Boko Haram Insurgency in Nigeria: A Case Study of Abuja Metropolis

2020 ◽  
pp. 1-11
Author(s):  
Audu Bako Susan ◽  
Chijioke, N. Joy ◽  
Uwakwe Stanley Ikechukwu
Keyword(s):  
Quantitative Research ◽  
Local Economy ◽  
Islamic State ◽  
Boko Haram ◽  
Intelligence Gathering ◽  
Best Management ◽  
Food Shortages ◽  
Grass Root ◽  
And Migration

The deep and far-reaching fear, chaos and uncertainties related to the Boko Haram insurgency make an empirical study of its impacts significant. Boko Haram insurgency has not only resulted in many deaths but has adversely affected agricultural production in Nigeria and distorted local economy. The Global Terrorism Index (GTI) said Boko Haram has killed more people than any other terrorist group in the world, including the Islamic State. Boko Haram is also responsible for deaths and deprivation in an indirect way of starve-killing. Their operations have caused food shortages, created food insecurity in Nigeria resulting in many farmers either being killed, displaced or their livelihoods destroyed. Infrastructural facilities on the other hand, as well as businesses have not been spared of the devastating impacts of the Boko Haram insurgency. This study strategically examined the effectiveness of security agencies management of Boko Haram insurgencies, identified its impact and examined the best management mechanisms for the insurgency, within the contextual preview of Abuja metropolis. The study adopted a quantitative research design of purposive sampling approach and discovered from the research that attacks on the metropolis resulted in urban dislocation and migration. It therefore recommends increased security partnership, improved welfare for security agencies, training of security agencies in intelligence gathering and management, encourage and strengthen grass root community policing.

scholarly journals Evaluating citizen science outreach: A case-study with The Peregrine Fund’s American Kestrel Partnership

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248948
Author(s):  
Sarah E. Schulwitz ◽  
Greg C. Hill ◽  
Vanessa Fry ◽  
Christopher J. W. McClure
Keyword(s):  
Citizen Science ◽  
Communication Strategies ◽  
Monitoring Program ◽  
Research Priorities ◽  
Future Research ◽  
Discussion Boards ◽  
Science Program ◽  
Science Outreach ◽  
American Kestrel

Citizen science programs can be powerful drivers of knowledge and scientific understanding and, in recent decades, they have become increasingly popular. Conducting successful research with the aid of citizen scientists often rests on the efficacy of a program’s outreach strategies. Program evaluation is increasingly recognized as a critical practice for citizen science practitioners to ensure that all efforts, including outreach, contribute to the overall goals of the program. The Peregrine Fund’s American Kestrel Partnership (AKP) is one such citizen science program that relies on outreach to engage participants in effective monitoring of a declining falcon species. Here, we examine whether various communication strategies were associated with desired outreach goals of the AKP. We demonstrate how social media, webcams, discussion boards, and newsletters were associated with perception of learning, agreement with our conservation messaging, and participation in our box monitoring program. Our results thus help us to improve our outreach methodology, suggest areas where other citizen science programs might improve their outreach efforts, and highlight future research priorities.

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