scholarly journals Spill-over from aquaculture may provide a larval subsidy for the restoration of mussel reefs

2020 ◽  
Vol 12 ◽  
pp. 231-249
Author(s):  
C Norrie ◽  
B Dunphy ◽  
M Roughan ◽  
S Weppe ◽  
C Lundquist

Worldwide bivalve aquaculture is expanding rapidly. Simultaneously, there has been a loss of natural bivalve reefs due to anthropogenic activities. As bivalve reefs support several ecosystem functions disproportionate to the area they cover, there is interest in their restoration. The Firth of Thames (FoT) in northern New Zealand once supported dense populations of green lipped mussels Perna canaliculus, which were extirpated by a dredge fishery in the mid-20th century. Efforts to restore these biogenic habitats are underway. The largest standing populations of this species in the area currently exist in aquaculture. This study aimed to determine if larval spill-over from aquaculture can provide a larval subsidy to bivalve reef restoration efforts in the FoT. We used a combination of trace elemental fingerprinting and biophysical modelling techniques to determine patterns of larval dispersal in the area. Results of both approaches indicated that the larval pool in the area is well mixed with larvae produced at aquaculture locations capable of settling throughout the study area. Overall this shows, for the first time, that larval spill-over from aquaculture may provide a subsidy to restoration efforts and assist with establishing sustainable populations. When determining restoration locations, the potential for aquaculture populations to act as a larval source should be explicitly considered. Conversely, when considering the location of new aquaculture sites, the consequences of larval spill-over to surrounding wild populations should be assessed. We recommend that restoration efforts and aquaculture be carefully integrated in a network approach which could provide both ecological and economic benefits.

2021 ◽  
Vol 328 (1) ◽  
pp. 435-446
Author(s):  
Salma Ibrahim ◽  
M. M. Musthafa ◽  
M. Mohamed Aslam ◽  
K. M. Abdurahman ◽  
M. Sudarshan ◽  
...  

2014 ◽  
Vol 68 (5-6) ◽  
pp. 371-378
Author(s):  
Marija Manic ◽  
Bosiljka Djuricic ◽  
Z. Raicevic

Honey bees are the most significant pollinators of plants worlwide. Importance of plant pollination widely exceeds all other economic benefits of modern beekeeping such as production of honey, Royal jelly, propolis, beeswax, honeybee venom etc. The issues concerning bees diseases are of extreme importance in modern commercial beekeeping. That especially regards to the fact that the number of disease agents in bees has considerably increased in recent decades. Using international transport, export or import of bees and their products, the possibility of entering various agents (parasites, bacterias, viruses and fungi) into bee colonies. In recent years one of the biggest problems in beekeeping in Asia has become tropilaelaps - ectoparasitic bee disease caused by mites of the genus Tropilaelaps. But because of prevalent interest in parasites Varroa destructor and Acarapis woodi, the threat of mites from Tropileaps family has not been familiar for a long period of time. Today, Tropilaelaps is on the list of diseases endangering the whole world, made by OIE. There is a real risk of its spreading, mostly through trade, that is import of bees, swarms, queen bees, bee products and equipment. In the Republic of Serbia, this disease was described for the first time in April-May 1981 in bumblebees and bees in which a mass infestation with until then unknown parasites was detected. By additional analysis there was found out that the parasite in question was from Laelapidae (Mesostigmata) family, Tropilaelaps.


Author(s):  
Zhangqi Zhong ◽  
Xu Zhang ◽  
Weina Gao

Global climate change caused by greenhouse gas emissions (GHGs) from anthropogenic activities have already become the focus of the world. A more systematic and comprehensive analysis on the factors influencing the changes of global GHGs transferring via trade have not been fully discussed. To this end, employing spatial econometric regression models and multi-regional input-output models, this paper reveals factors influencing the GHGs transferring via trade changes in 39 major economies, so as to develop the relevant GHGs reduction policies. The results indicate that regions with the highest net outflow of GHGs transferring via trade are primarily Russia and Canada, and the adverse effects of promoting GHGs reduction on the national economy could be avoided by these regions owing to trade relations. Additionally, factors influencing the changes in GHGs transferring via trade have significant spatial autocorrelation, and population size and energy structure exert significant spatial spillover effects on the changes in the GHGs transferring via trade. On this basis, this paper suggests that one more effective way to prevent trade from the rigorous demands of environmental governance measures while preserving the economic benefits of international trade may be to facilitate cooperation between countries on GHGs mitigation. Further, we articulate more balanced environment governance policies, including conducting the sharing of advanced energy technologies and developing clearer production technologies.


2019 ◽  
Vol 323 (3) ◽  
pp. 1405-1412
Author(s):  
R. V. Salma Ibrahim ◽  
M. M. Musthafa ◽  
K. M. Abdurahman ◽  
M. Aslam

Author(s):  
Maryna Averkyna ◽  
Yevhenii Oktysiuk

The article considers the preconditions of anti-corruption reform, the essence, economic results and the current situation. Recommendations are also given that should be followed to improve the situation. Prior to the start of the implementation of the anti-corruption reform, there was corruption, which in fact was not prosecuted in any way due to the fact that the judicial system of Ukraine itself was corrupt. The anti-corruption reform established several independent institutions to investigate and convict corruption offenses, including the National Anti-Corruption Bureau of Ukraine, the Specialized Anti-Corruption Prosecutor's Office, the Supreme Anti-Corruption Court, and the National Agency for the Prevention of Corruption. These institutions have been called upon to be new independent bodies that receive appeals of corruption violations, investigate cases, and pass sentences. Also, these bodies form and coordinate anti-corruption policy in Ukraine, organize work to prevent and detect corruption in local governments, enterprises, institutions and organizations. Since these institutions were just starting to work, the first few years the economic results were insignificant, but gradually the amount of compensation and terminated illegal contracts became solid. Despite the economic results of the anti-corruption reform, there is a significant outflow of foreign investment for the first time in five years. The main reason for this is distrust of the judiciary and the prevalence of corruption. Despite the economic benefits of fighting corruption, corruption is in fact covered by top government officials, rather than any support from anti-corruption institutions. The article gives some recommendations on how to act in this situation. In particular, it is called upon to support and strengthen Ukraine's anti-corruption infrastructure; pass real sentences on real corrupt officials so that society and investors are convinced that the government is resolutely fighting corruption; punish top corrupt officials, regardless of position, to stop corruption at the highest level, where it is just reaching its peak.


Author(s):  
Hualei Yi

Abstract In the marginal gas field development engineering, considering the low gas production with complex reservoir condition, it is difficult to develop independently because of the low economic efficiency. It is usually developed by relying on an existing offshore platform or facility nearby, in which hydrate inhibition is an important issue, and in order to inhibit hydrate formation in the subsea pipeline, hydrate inhibition method should be studied. Based on certain marginal gas field development project in South China Sea, which relies on nearby DPP platform, the paper studies methanol and MEG as inhibitor and application of double-layer insulated subsea pipeline. Finally by technical and economic comparisons, for the first time double-layer insulated pipeline is selected as the hydrate inhibition method to meet requirements of both relying on DPP and achieving better economic benefits, which is expected to provide reference for similar marginal gas field development.


2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Li Li ◽  
Jiayong Liu ◽  
Peng Jia

Over the past decades, there have existed extensive research works on the designs of the closest pre-tender procurement bidding. However, most solutions for the closest pre-tender only target at economic benefits while omitting the problem of bid privacy leakage. Moreover, existing works fail to provide approaches with adequate security and high efficiency. In this paper, for the first time, we propose SPCTR, a sealed-price auction-based procurement bidding system for the closest pre-tender with range validation. SPCTR allows a range validation for a supplier’s bid without leaking the secret bid. Besides, SPCTR achieves a sealed-price comparison with the pre-tender to find the closest pre-tender bid. Compared with previous works, SPCTR provides strong privacy protection for the bids of suppliers without sacrificing high efficiency. SPCTR is constructed based on carefully designed cryptographic tools with generality and simplicity which enable various operations on the encrypted values, and these tools can be easily applied to other contexts. We not only formally prove that SPCTR is secure against semihonest adversaries but also comprehensively analyze the efficiency. Experimental results validate that SPCTR achieves procurement bidding with light computation time and communication cost in practice.


2019 ◽  
Vol 6 (2) ◽  
pp. 431-448
Author(s):  
Louis Rice

Purpose The purpose of this paper is to examine how nature-based solutions (NBS) are being used in city areas to improve environmental conditions and increase tourism. This research examines the drivers behind, and impacts of, the application of NBS in city redevelopment projects for tourism. NBS is a term that refers to the use of flora and fauna ecosystems as an approach to resolve problems faced by society. Design/methodology/approach An interdisciplinary research methodology has been developed to examine the relationship between city NBS and tourism; the methods include a literature review of contemporary practice, field observations and thematic textual analysis from digital archives. The research methodology uses a combined empirical and desk-based analysis of five case studies cites. Findings NBS, as part of city redevelopment projects, is now a strategic aim of many cities globally to re-brand, re-vision and re-orientate themselves to be more hospitable, liveable and attractive to tourists and visitors. Practical implications City redevelopment projects are incorporating NBS to address climate change as well as local environmental issues such as disaster resilience whilst simultaneously delivering social and economic benefits. Social implications The research reveals that NBS can deliver benefits to human wellbeing, tourism, economic vitality as well as more sustainable models of urban development. Originality/value The research reveals for the first time how NBS is being used as a driver for increasing tourism globally. The research is highly original as it examines a new topic in tourism studies, the role of NBS in relation to city tourism.


Zootaxa ◽  
2008 ◽  
Vol 1779 (1) ◽  
pp. 33 ◽  
Author(s):  
A. C. EYLES ◽  
T. MARAIS ◽  
S. GEORGE

Macrolophus pygmaeus (Rambur, 1839) is recorded for the first time in New Zealand. Viable adult M. pygmaeus were collected in the field in Auckland, in 2007, indicating that the species had already established itself in this country. The biology of M. pygmaeus is briefly discussed in the light of its potential economic benefits to growers of vegetable crops affected by whitefly (Aleyrodidae). The adults and nymphs are described and illustrated. An updated key to the genera and species of Bryocorinae in New Zealand is provided.


2021 ◽  
Vol 55 (3) ◽  
pp. 120-121
Author(s):  
Emily Higgins ◽  
Konstantin Sobolev

Abstract Globally, artificial reefs (ARs) are being increasingly used as a coral reef restoration strategy, and ARs made from conventional substrates (e.g. metal, concrete) have had limited success for coral reef conservation due to structure size and lack of pre-deployment engineering. To curb further deterioration on reefs, technological advances in restoration methods must be quickly tested and applied on a large scale. Here, we present the results of the first IntelliReefs biomimicking “Oceanite” nanotechnology ARs. We compared benthic community composition on three Oceanite ARs 14 months after deployment in Sint Maarten. We also examined fish abundance, diversity, and behaviour on the ARs. The results from this study suggest that Oceanite can enhance local biodiversity, attract coral recruits, provide food and protection for large fish communities, and develop a healthy early coral reef community in 14 months. IntelliReefs' future research will focus on large-scale deployments and further development of site-, species-, and function-specific substrates to optimize AR conservation goals and increase project success. Our Ocean-Shot will deploy durable, bio-enhanced reefs that build resilience to climate change, increase economic benefits, and coastal protection for seaside communities. Oceanite can further be customized for specific stressor mitigation (e.g., pathogens, warming, acidification, reduced water quality, invasive species).


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