scholarly journals Simulated Fishing to Untangle Catchability and Availability in Fish Abundance Monitoring

2021 ◽  
Vol 19 (3) ◽  
Author(s):  
Vanessa Tobias ◽  
Keyword(s):  
San Francisco ◽  
Water Clarity ◽  
Ecological Monitoring ◽  
Monitoring Data ◽  
Delta Smelt ◽  
Individual Based Simulation ◽  
The Relationship ◽  
True Population

In fisheries monitoring, catch is assumed to be a product of fishing intensity, catchability, and availability, where availability is defined as the number or biomass of fish present and catchability refers to the relationship between catch rate and the true population. Ecological monitoring programs use catch per unit of effort (CPUE) to standardize catch and monitor changes in fish populations; however, CPUE is proportional to the portion of the population that is vulnerable to the type of gear used in sampling, which is not necessarily the entire population. Programs often deal with this problem by assuming that catchability is constant, but if catchability is not constant, it is not possible to separate the effects of catchability and population size using monitoring data alone. This study uses individual-based simulation to separate the effects of changing environmental conditions on catchability and availability in environmental monitoring data. The simulation combines a module for sampling conditions with a module for individual fish behavior to estimate the proportion of available fish that would escape from the sample. The method is applied to the case study of the well monitored fish species Delta Smelt (Hypomesus transpacificus) in the San Francisco Estuary, where it has been hypothesized that changing water clarity may affect catchability for long-term monitoring studies. Results of this study indicate that given constraints on Delta Smelt swimming ability, it is unlikely that the apparent declines in Delta Smelt abundance are the result of changing water clarity affecting catchability.

scholarly journals Simulated Fishing to Untangle Catchability and Availability in Fish Abundance Monitoring

2021 ◽  
Author(s):  
Vanessa Tobias
Keyword(s):  
San Francisco ◽  
Water Clarity ◽  
Ecological Monitoring ◽  
Monitoring Data ◽  
Delta Smelt ◽  
Individual Based Simulation ◽  
The Relationship ◽  
True Population

In fisheries monitoring, catch is assumed to be a product of fishing intensity, catchability, and availability, where availability is defined as the number or biomass of fish present and catchability refers to the relationship between catch rate and the true population. Ecological monitoring programs use catch per unit of effort (CPUE) to standardize catch and monitor changes in fish populations; however, CPUE is proportional to the portion of the population that is vulnerable to the type of gear that is used in sampling, which is not necessarily the entire population. Programs often deal with this problem by assuming that catchability is constant, but if catchability is not constant, it is not possible to separate the effects of catchability and population size using monitoring data alone. This study uses individual-based simulation to separate the effects of changing environmental conditions on catchability and availability in environmental monitoring data. The simulation combines a module for sampling conditions with a module for individual fish behavior to estimate the proportion of available fish that would escape from the sample. The method is applied to the case study of the well-monitored fish species Delta Smelt (Hypomesus transpacificus) in the San Francisco Estuary, where it has been hypothesized that changing water clarity may affect catchability for long-term monitoring studies. Results of this study indicate that given constraints on Delta Smelt swimming ability, it is unlikely that the apparent declines in Delta Smelt abundance are due to an effect of changing water clarity on catchability.

scholarly journals Simulated Fishing to Untangle Catchability and Availability in Fish Abundance Monitoring

2021 ◽  
Author(s):  
Vanessa Tobias
Keyword(s):  
San Francisco ◽  
Water Clarity ◽  
Ecological Monitoring ◽  
Monitoring Data ◽  
Delta Smelt ◽  
Individual Based Simulation ◽  
The Relationship ◽  
True Population

In fisheries monitoring, catch is assumed to be a product of fishing intensity, catchability, and availability, where availability is defined as the number or biomass of fish present and catchability refers to the relationship between catch rate and the true population. Ecological monitoring programs use catch per unit of effort (CPUE) to standardize catch and monitor changes in fish populations; however, CPUE is proportional to the portion of the population that is vulnerable to the type of gear that is used in sampling, which is not necessarily the entire population. Programs often deal with this problem by assuming that catchability is constant, but if catchability is not constant, it is not possible to separate the effects of catchability and population size using monitoring data alone. This study uses individual-based simulation to separate the effects of changing environmental conditions on catchability and availability in environmental monitoring data. The simulation combines a module for sampling conditions with a module for individual fish behavior to estimate the proportion of available fish that would escape from the sample. The method is applied to the case study of the well-monitored fish species Delta Smelt (Hypomesus transpacificus) in the San Francisco Estuary, where it has been hypothesized that changing water clarity may affect catchability for long-term monitoring studies. Results of this study indicate that given constraints on Delta Smelt swimming ability, it is unlikely that the apparent declines in Delta Smelt abundance are due to an effect of changing water clarity on catchability.

scholarly journals Simulated Fishing to Untangle Catchability and Availability in Fish Abundance Monitoring

2020 ◽  
Author(s):  
Vanessa Tobias
Keyword(s):  
San Francisco ◽  
Water Clarity ◽  
Ecological Monitoring ◽  
Monitoring Data ◽  
Delta Smelt ◽  
Individual Based Simulation ◽  
The Relationship ◽  
True Population

In fisheries monitoring, catch is assumed to be a product of fishing intensity, catchability, and availability, where availability is defined as the number or biomass of fish present and catchability refers to the relationship between catch rate and the true population. Ecological monitoring programs use catch per unit of effort (CPUE) to standardize catch and monitor changes in fish populations; however, CPUE is proportional to the portion of the population that is vulnerable to the type of gear that is used in sampling, which is not necessarily the entire population. Programs often deal with this problem by assuming that catchability is constant, but if catchability is not constant, it is not possible to separate the effects of catchability and population size using monitoring data alone. This study uses individual-based simulation to separate the effects of changing environmental conditions on catchability and availability in environmental monitoring data. The simulation combines a module for sampling conditions with a module for individual fish behavior to estimate the proportion of available fish that would escape from the sample. The method is applied to the case study of the well-monitored fish species Delta Smelt (Hypomesus transpacificus) in the San Francisco Estuary, where it has been hypothesized that changing water clarity may affect catchability for long-term monitoring studies. Results of this study indicate that given constraints on Delta Smelt swimming ability, it is unlikely that the apparent declines in Delta Smelt abundance are due to an effect of changing water clarity on catchability.

scholarly journals Blending in: A Case Study of Transitional Ambidexterity in the Financial Sector

2021 ◽  
Vol 13 (4) ◽  
pp. 1690
Author(s):  
Beniamino Callegari ◽  
Ranvir S. Rai
Keyword(s):  
Financial Sector ◽  
Economic Sustainability ◽  
Organizational Ambidexterity ◽  
Management Literature ◽  
Innovative Capabilities ◽  
Financial Firm ◽  
The Relationship

Organizational ambidexterity is widely recognized as necessary for the economic sustainability of firms operating in the financial sector. While the management literature has recognized several forms of ambidexterity, the relationship between them and their relative merits remain unclear. By studying a process of implementation of ambidextrous capabilities within a large Scandinavian financial firm, we explore the role of top-down reforms and bottom-up reactions in determining the development of sector-specific innovative capabilities. We find that blended ambidexterity follows naturally from the attempt to correct the tensions arising from harmonic ambidextrous blueprints. The resulting blended practice appears to be closely related to the reciprocal model of ambidexterity, which appears to be a necessity rather than a choice, for large firms attempting to develop innovative capabilities. Consequently, we suggest to re-interpret current taxonomies of ambidexterity not as alternative blueprints, but rather as stages in a long-term process of transition.

scholarly journals Duše předmětu a tělo modlitby aneb zkoumání sociologických nejistot na případu Sóka Gakkai International

2020 ◽  
Vol 17 (2) ◽  
pp. 53-69
Author(s):  
Petra Tlčimuková
Keyword(s):  
Social Sciences ◽  
Network Theory ◽  
Actor Network Theory ◽  
Sociology Of Religion ◽  
Black Boxes ◽  
The Social ◽  
Soka Gakkai ◽  
The Relationship

This case study presents the results of long-term original ethnographic research on the international Buddhist organization Soka Gakkai International (SGI). It focuses on the relationship between the material and immaterial and deals with the question of how to study them in the sociology of religion. The analysis builds upon the critique of the modernist paradigm and related research of religion in the social sciences as presented by Harman, Law and Latour. The methodology draws on the approach of Actor-Network Theory as presented by Bruno Latour, and pursues object-oriented ethnography, for the sake of which the concept of iconoclash is borrowed. This approach is applied to the research which focused on the key counterparts in the Buddhist praxis of SGI ‒ the phrase daimoku and the scroll called Gohonzon. The analysis deals mainly with the sources of sociological uncertainties related to the agency of the scroll. It looks at the processes concerning the establishing and dissolving of connections among involved elements, it opens up the black-boxes and proposes answers to the question of new conceptions of the physical as seen through Gohonzon.

A Case Study of Effectively Implemented Information Systems Security Policy

2008 ◽  
pp. 1727-1740
Author(s):  
Charla Griffy-Brown ◽  
Mark W.S. Chun
Keyword(s):  
Information Security ◽  
Security Policy ◽  
Case Analysis ◽  
Web Based ◽  
Systems Security ◽  
Policies And Procedures ◽  
Technical Architecture ◽  
The Relationship

This chapter demonstrates the importance of a well-formulated and articulated information security policy by integrating best practices with a case analysis of a major Japanese multinational automotive manufacturer and the security lessons it learned in the implementation of its Web-based portal. The relationship between information security and business needs and the conflict that often results between the two are highlighted. The case also explores the complexities of balancing business expedience with long-term strategic technical architecture. The chapter provides insight and offers practical tools for effectively developing and implementing information security policies and procedures in contemporary business practice.

Critical and Inhibiting Success Factors in Interorganizational Networks

2020 ◽  
pp. 63-86
Author(s):  
Viviana Durão ◽  
António Carrizo Moreira
Keyword(s):  
Success Factors ◽  
Single Case ◽  
Interorganizational Networks ◽  
Single Case Study ◽  
Strategic Partnerships ◽  
Structured Interviews ◽  
Organizational Network ◽  
The Relationship

This chapter, based on a single case study, has as its main objective to analyze a real example of creating an inter-organizational network and to perceive what was done for the selection and creation of the strategic partnerships and inter-organizational network and what factors or conditions can inhibit these partnerships from having long-term success and throughout its life cycle. For this, a qualitative study based on action research and semi-structured interviews was conducted. Results show although many companies settle in inter-organizational networks to gain competitive advantage, cases of failure are still quite high. In this case, upstream partnerships have not been based on long-term trust and commitment, which has jeopardized the continuity of the network, although there is an express desire to re-establish contacts. The partnership established downstream did not show the same commitment to continue the partnership with a total termination of the relationship.

Selection of indicator species for State of the Environment reporting: A case study from New Zealand

2010 ◽  
Vol 16 (2) ◽  
pp. 76 ◽  
Author(s):  
Joanne M. Hoare ◽  
Colin F. J. O’Donnell ◽  
Elaine F. Wright
Keyword(s):  
New Zealand ◽  
Indicator Species ◽  
Species Concepts ◽  
Monitoring Data ◽  
Environmental Reporting ◽  
Environmental Attributes ◽  
State Of The Environment ◽  
Selection Of

Indicator species approaches are widely used in conservation as a shortcut to measuring attributes of species and ecosystems. A variety of indicator species concepts are in use and are applicable to a range of situations. Indicator species are increasingly being used in environmental reporting to evaluate trends in environmental attributes quantitatively. We use the most recent State of the Environment report from New Zealand as a case study to evaluate: (1) how indicator species concepts are being applied to environmental reporting and (2) the selection of individual species as indicators. At present indicator species used in environmental reporting in New Zealand reflect biases in national monitoring data towards forest-dwelling, terrestrial vertebrates that are vulnerable to predation by introduced mammals. Scientific literature generally supports links between selected taxa and the aspect of ecosystem health they are purported to indicate, but their roles as long-term indicators of environmental health have yet to be evaluated. A primary goal of State of the Environment reporting is to set a benchmark against which environmental outcomes can be monitored over time; thus it is recognized that taxa reported should represent a broader range of environmental attributes. However, selection of taxa for environmental reporting is severely constrained by limited national species monitoring data. A strategic approach to national measurement, storage and analysis of long-term monitoring data is required to support selection of representative species for environmental reporting. We support current initiatives to select taxa for future measurement and reporting in an objective, transparent manner and recommend that they encompass representation of: (1) taxonomic diversity, (2) ecosystem types, (3) key environmental pressures and (4) threat status.

Knowledge Transfer in Offshore Outsourcing

2011 ◽  
Vol 19 (2) ◽  
pp. 27-44 ◽  
Author(s):  
Nguyen Thu Huong ◽  
Umemoto Katsuhiro ◽  
Dam Hieu Chi
Keyword(s):  
Knowledge Transfer ◽  
Transfer Process ◽  
Service Providers ◽  
Offshore Outsourcing ◽  
System Engineer ◽  
The Relationship ◽  
Initial Results ◽  
Willingness To Cooperate

This paper discusses the knowledge transfer process in offshore outsourcing. The focus is a case study of software offshore outsourcing from Japan to Vietnam. Initial results confirm that willingness to cooperate and good impressions facilitate the knowledge transfer process. In addition, communication barriers, cultural differences, lack of equivalence in individual competence, and lack of common rules slow down the transfer process. The study also identifies the Bridge System Engineer (Bridge SE)-a type of coordinator who mediates and enhances the relationship between Japanese clients and Vietnamese service providers. Employing a Bridge SE is an effective way to fill the communication gap, the cultural gap, and generally improve the business relationship. Bridge SEs use their background of higher education and long-term residence in Japan to give advice to Vietnamese software teams on Japanese cultural characteristics, such as the apology culture and the separation between work and private time. In other situations, Bridge SEs use their IT background and communication skills to verify and adjust communication contents before information is sent from one side to another.

scholarly journals Representing a Relationship: The use of metadata to represent the relationship between physical objects and their digital surrogates

2021 ◽  
Author(s):  
◽  
Laura Jamieson
Keyword(s):  
Best Practice ◽  
Physical Object ◽  
Digital Collections ◽  
Significant Development ◽  
Digital Material ◽  
Digital Objects ◽  
Physical Objects ◽  
The Relationship

<p>Digital collections are increasingly prominent in museums as born-digital material is acquired by institutions, and digital surrogates of physical items are created through digital imaging, digitisation, and reformatting projects. These digital collections are a significant development in museums and a useful tool, particularly for access. When a digital surrogate is created of a physical object, they have an inherent connection to one another. Representing this relationship is important for museums in order to provide context for their collection items. These types of relationships also occur across physical formats, and the consequence of a breakdown in this relationship has been shown in the literature to lead to a loss of context. However, it is unclear how the relationship a physical object has with its digital surrogate is represented in the metadata. Current literature on digital collections only briefly explores existing relationships between digital and physical collections and provides no framework for best practice in a museum context.  This thesis examines how metadata is used to represent the relationship between a physical object and its digital surrogate at the Museum of New Zealand Te Papa Tongarewa. The research involved a single-site case study, with interviews and documentary research which were thematically analysed. This thesis shows how the relationship between physical and digital objects are primarily represented at Te Papa through the collection management system’s structure, with some metadata elements representing the relationship incidentally. It also shows that there are differing worldviews and perspectives across the GLAM domains in the language and the drivers of digitisation.  This research serves as a snapshot of current practice at one institution and encourages further research to better understand the long-term implications of this and other approaches. For museums, understanding how the relationship between physical objects and digital surrogates is currently being represented through metadata could help support professional practice for both types of collections, ensure the relationship is maintained, and help support existing and future digital interventions in museums.</p>

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