The role of fish in cyanobacterial blooms in Australia

1994 ◽  
Vol 45 (5) ◽  
pp. 905 ◽  
Author(s):  
PC Gehrke ◽  
JH Harris
Keyword(s):  
Freshwater Fish ◽  
Trophic Interactions ◽  
Cyanobacterial Blooms ◽  
Native Fish ◽  
Fish Stocks ◽  
Natural Predator ◽  
Fish Grazing ◽  
Zooplankton Communities ◽  
Alternative Solutions

Potential pathways for interaction between fish and cyanobacteria include fish grazing directly on cyanobacteria, fish preying on grazers of cyanobacteria, fish supplying nutrients through excretion, fish providing nutrients by resuspending sediments, and fish altering the availability of nutrients and light by damaging macrophytes. The dominant interactions in Australia are likely to be through pathways that increase the availability of nutrients at the bottom of the food web. Carp probably contribute to these pathways more than do other species by excreting nutrients, resuspending sediments and damaging macrophytes. Further research, on both alien and native fish species, is needed to quantify these processes. Grazing of cyanobacteria by fish is probably trivial because freshwater fish in Australia lack mechanisms to process cyanobacterial cells effectively. Trophic interactions between planktivorous fish, zooplankton and cyanobacteria require closer study to assess the potential for preventing cyanobacterial blooms by manipulating natural predator communities in Australia. However, the need to protect and strengthen native fish stocks precludes removal of native fish to reduce predation pressure on zooplankton communities. Alternative solutions that combine control of nutrients entering waterways and removal of carp have a higher likelihood of success.

Modeling cyanobacterial blooms in tropical reservoirs: The role of physicochemical variables and trophic interactions

2020 ◽  
Vol 744 ◽  
pp. 140659 ◽  
Author(s):  
Cihelio Alves Amorim ◽  
Ênio Wocyli Dantas ◽  
Ariadne do Nascimento Moura
Keyword(s):  
Trophic Interactions ◽  
Cyanobacterial Blooms ◽  
Tropical Reservoirs ◽  
Physicochemical Variables

scholarly journals Contrasting effects of urbanization on arboreal and ground-dwelling land snails: role of trophic interactions and habitat fragmentation

2020 ◽  
Vol 23 (3) ◽  
pp. 603-614
Author(s):  
Ikuyo Saeki ◽  
Shigeru Niwa ◽  
Noriyuki Osada ◽  
Wakana Azuma ◽  
Tsutom Hiura
Keyword(s):  
Habitat Fragmentation ◽  
Trophic Interactions ◽  
Land Snails

scholarly journals Herring and ICES: a historical sketch of a few ideas and their linkages

2009 ◽  
Vol 66 (8) ◽  
pp. 1652-1661 ◽  
Author(s):  
Mike Sinclair
Keyword(s):  
Paradigm Shift ◽  
Pelagic Fish ◽  
Marine Ecology ◽  
Effective Management ◽  
Paradigm Shifts ◽  
Population Thinking ◽  
Fish Stocks ◽  
Considerable Debate ◽  
Historical Sketch

Abstract Sinclair, M. 2009. Herring and ICES: a historical sketch of a few ideas and their linkages. – ICES Journal of Marine Science, 66: 1652–1661. This introduction to the Symposium on “Linking Herring” sketches the development of some ideas generated from herring research within an ICES context. The work of Committee A (1902–1908), under the leadership of Johan Hjort, led to a paradigm shift from “migration thinking” to “population thinking” as the interpretation of fluctuations in herring landings. From the 1920s to the 1950s, the focus on forecasting services for the herring fisheries, although ultimately unsuccessful, had the unintended consequence of generating ideas on recruitment overfishing and the match–mismatch hypothesis. The collapse of the East Anglian fishery led, in 1956, to considerable debate on its causes, but no consensus was reached. Three consecutive symposia dealing with herring (1961, 1968, and 1970) reveal a changing perspective on the role of fishing on recruitment dynamics, culminating in Cushing’s 1975 book (“Marine Ecology and Fisheries”, referred to here as the “Grand Synthesis”), which defined the concept of recruitment overfishing and established the future agenda for fisheries oceanography. The 1978 ICES “Symposium on the Assessment and Management of Pelagic Fish Stocks” is interpreted as the “Aberdeen Consensus” (i.e. without effective management, recruitment overfishing is to be expected). In conclusion, herring research within ICES has led to many ideas and two major paradigm shifts.

scholarly journals Regulatory Impact Assessment in Post-Soviet Countries: Results, Problems and Prospects

2018 ◽  
Vol 8 (2) ◽  
pp. 84-93
Author(s):  
I.  D. Turgel ◽  
A.  Zh. Panzabekova
Keyword(s):  
Impact Assessment ◽  
State Regulation ◽  
Regulatory Impact ◽  
Government Interference ◽  
The Subject ◽  
Soviet Space ◽  
Alternative Solutions ◽  
Regulatory Impact Assessment

The subject of research is the institute of regulatory impact assessment, implemented in the sphere of state regulation of economy in post-Soviet countries. The research aims to analyze the main approaches to the implementation of the regulatory impact assessment in the post-Soviet countries — Russia, Armenia, Belarus, Kazakhstan, Kyrgyzstan, Uzbekistan, as well as to determine the prospects of development of this institute in the countries included in the analyzed set. Using the methodology of comparative research, the study collates the concept content of “regulatory impact assessment” in some of the post-soviet countries, the structure of the objects of assessment and government levels, at which it is performed. The research analyzes the methodological framework of the regulatory impact assessment and models of the organization of monitoring and quality control of regulatory impact assessment in the countries from the analyzed set. The paper characterizes the role of the regulatory impact assessment in the system of state regulation of economy in the countries of post-Soviet space, identifies the general and specific features in the functioning of the mechanisms of regulatory impact assessment in the analyzed countries, describes the problems of assessment in the activities of state authorities and local selfgovernment, and substantiates the development prospects of the institute of the regulatory impact assessment. The research provides findings on the need for improving the quality of the existing methodological support of the regulatory impact assessment, the lack of methodical approaches to evaluating the effectiveness of this institution, the risks of formalizing procedures of the regulatory impact assessment, and the feasibility of the regulatory impact assessment “integration” in the national strategy to encourage business and economic growth. Moreover, the paper notes that at the present stage of the development of the regulatory impact assessment institute little attention is paid to finding alternative solutions which require government interference in the economy. 

scholarly journals Role of visual communication design as effective COVID-19 information and education media for community

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
N. Ilma ◽  
P. A. W. Hidayat ◽  
D. Setiono ◽  
B. H. Prilosadoso
Keyword(s):  
Visual Communication ◽  
Design Research ◽  
Inductive Logic ◽  
Research Process ◽  
Visual Communication Design ◽  
Communication Design ◽  
Applied Art ◽  
Technological Developments ◽  
Alternative Solutions

Visual-based technology as a medium of contact and alternative solutions in pandemic conditions requires a design role, primarily visual communication design during the coronavirus outbreak. Visual communication design becomes an intermediary bridge for information, education, and recreation media to the community. Various aspects of the design become part of applied art, which has goals and benefits to overcome problems in society. The WHO on March 11, 2020, declared the COVID-19 as a pandemic that affects almost regions of the world, where nearly more than five million people are infected. The technology eliminates distance and is an essential part of the development of visual communication design. Research on technological developments in the field of visual communication design in the application of information and education media in the spread of this pandemic. The qualitative research methods states that this research method is used well in examining the details of the research subject. The natural condition of researchers without engineering, where the research process can describe the process from time to time; b). Inductive analysis, which contains exploration orientation, discovery, and inductive logic, so that theories and patterns are in reality; and c) Description of human behaviour in its natural context.

scholarly journals Sistem Bombon: Fungsionalisme Struktural terhadap Masyarakat Kadazandusun di Kiulu, Tuaran, Sabah

2021 ◽  
Vol 14 (1) ◽  
pp. 101-114
Author(s):  
Jacinta Tangil ◽  
◽  
Asmiaty Amat
Keyword(s):  
Field Study ◽  
Freshwater Fish ◽  
Human Relations ◽  
Traditional Beliefs ◽  
Positive Effects ◽  
Customary Laws ◽  
Structural Functionalism ◽  
Implicit And Explicit ◽  
Continuous Source

This study discusses the practice of the bombon system which is a tradition of the Kadazandusun community. The bombon system is a method of conservation of freshwater fish that has been practiced by the Kadazandusun since the time of their ancestors. Through this practice, the Kadazandusun community can preserve their environment, while at the same time ensuring a continuous source of fish. The bombon tradition is based on the traditional beliefs and customary laws of the Kadazandusun people. The bombon system shows the local wisdom of the Kadazandusun community towards the environment and in human relations. The problem around which this study is centred relates to the structural functionalism of the bombon system in the life of the Kadazandusun community. The objective of this study is to look at the function and role of the practice of the bombon system in the life of the Kadazandusun community. This study was conducted via field study, employing interviews, participatory observations and document research. The results show that the bombon system and the Kadazandusun community are functional and support each other’s survival. The practice of the bombon system becomes a functional aesthetic requirement for the community of bombon practitioners, furthering its role as a contributor to the values and culture of the practitioner community. The practice of the bombon system, which highlights many implicit and explicit positive effects in the life of the Kadazandusun community, proves that the practice is functional and continues to be relevant to the life of the community today.

Erratum to “Modelling phytoplankton succession on the Bering Sea shelf: role of climate influences and trophic interactions in generating Emiliania huxleyi blooms 1997–2000”

2005 ◽  
Vol 52 (5) ◽  
pp. 881-882
Author(s):  
Agostino Merico ◽  
Toby Tyrrell ◽  
Evelyn J. Lessard ◽  
Temel Oguz ◽  
Phyllis J. Stabeno ◽  
...  
Keyword(s):  
Trophic Interactions ◽  
Bering Sea ◽  
Emiliania Huxleyi ◽  
Phytoplankton Succession ◽  
Climate Influences ◽  
Bering Sea Shelf ◽  
The Bering Sea

Pesticide side-effects on predatory mites: the role of trophic interactions

2010 ◽  
pp. 465-469 ◽  
Author(s):  
Alberto Pozzebon ◽  
Carlo Duso
Keyword(s):  
Side Effects ◽  
Trophic Interactions ◽  
Predatory Mites

scholarly journals Peran Tenaga Kesehatan dalam Melaksanakan Pelayanan Kesehatan WBP Rutan

2020 ◽  
Vol 11 (1) ◽  
pp. 205-212
Author(s):  
Ruth Faeriani Telaumbanua
Keyword(s):  
Health Services ◽  
Health Workers ◽  
Health Agency ◽  
Field Research ◽  
Detention Center ◽  
Detention Centers ◽  
Identity Card ◽  
The Government ◽  
Alternative Solutions

This research focuses on the role of health workers in carrying out health services for WBP in Detention Centers. The research method used is a qualitative approach. Data collection techniques used are field research by conducting interviews and observations as well as literature studies. Based on the results of research conducted it is known that the role of health workers in detention centers is in accordance with their main duties and functions. Detention centers have a Polyclinic as a place for the implementation of health services in detention centers. In addition in the implementation of health services, there is an MoU between the detention center and the Government. In this case the provision of free health services with a National Identity Card (KTP) at a government-owned health agency. In addition, the detention center supports the implementation of the National Health Insurance for Penitentiary Guides in the Detention Center. But in the implementation of health services, the role of health workers does not run optimally because health workers in detention centers are only nurses' medical backgrounds, besides the lack of supporting infrastructure. After analyzing various facts, several alternative solutions were found to be done by: increasing the number of human resources for medical doctors in detention centers. Each disease experienced by WBP can be directly dealt with in detention centers and the addition of infrastructure facilities so that the role of health workers in the implementation of health services in Detention center can run optimally.  

Role of nematodes in the food web: nematodes as predator and prey.

2021 ◽  
pp. 216-246
Author(s):  
Christoph Ptatscheck
Keyword(s):  
Food Web ◽  
Functional Response ◽  
Trophic Interactions ◽  
Individual Species ◽  
Energy Fluxes ◽  
Direct Observations ◽  
Microcosm Studies

Abstract This chapter provides information on the role of nematodes in the food web, including their participation in matter and energy fluxes within ecosystems. It highlights that nematodes are both predators and prey for organisms ranging from protozoans to vertebrates, based on gut analyses and direct observations. Functional response experiments, microcosm studies, and enclosures/exclosures in the field can be used to investigate the intensity of these trophic interactions and their impact on individual species as well as entire communities.

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