Population characteristics of southern sea garfish (Hyporhamphus melanochir, Hemiramphidae) in South Australia

2008 ◽  
Vol 59 (5) ◽  
pp. 429 ◽  
Author(s):  
A. J. Fowler ◽  
M. A. Steer ◽  
W. B. Jackson ◽  
M. T. Lloyd
Keyword(s):  
Large Scale ◽  
Annual Variation ◽  
South Australia ◽  
Population Characteristics ◽  
Season Length ◽  
Age Classes ◽  
Gulf Region ◽  
Commercial Catch ◽  
Important Species ◽  
Fishery Exploitation

Population dynamics, demography and spatial distribution of an important species of ‘halfbeak’, the southern sea garfish (Hyporhamphus melanochir), were studied in South Australia, which accounts for most of the national catch. Commercial catch and effort data were used to indicate spatial and temporal abundance. Catch sampling provided fish measurements and estimates of age, sex and reproductive maturity. Catches were from throughout South Australia’s gulf region, but three areas separated by hundreds of kilometres produced the highest catches. These relatively protected areas support extensive beds of intertidal and subtidal seagrasses. Statewide commercial fishery catches demonstrated considerable inter-annual variation of 240–320 t year–1. Catches were dominated by 1+ and 2+ fish, with few individuals from the 3+ to 5+ age classes. Females dominated the sex ratios, were the largest individuals, and the largest from each age class. No running ripe fish were sampled. Seasonal variation in the catch and in the lack of spawning fish suggested that adults might move from fishing areas during the spawning season. Length/weight and length/age relationships did not differ between areas separated by hundreds of kilometres, suggesting large-scale movement. Possible population truncation related to fishery exploitation has prompted a stock rebuilding program for the South Australian stock.

scholarly journals Optimized DNA Extracting Method for Oxford Nanopore- Long reads Sequencing from Marine samples

2020 ◽  
Author(s):  
Sonia Boughattas ◽  
Dana Al Batesh ◽  
Bruno Giraldes ◽  
Asmaa Al-Thani ◽  
Fatiha Benslimane
Keyword(s):  
Development Strategy ◽  
Native Species ◽  
Large Scale ◽  
Environmental Science ◽  
National Development ◽  
Genomic Analysis ◽  
Future Generations ◽  
Science Center ◽  
Gulf Region ◽  
Important Species

Sustaining social and economic growth is impossible without a holistic environmental vision that places environmental preservation for Qatar’s future generations at the forefront. According to the Ministry of Development and Planning and Statistics, the Qatar National Vision (QNV) 2030 aims to direct Qatar towards a balance between developmental needs and the protection of its natural environment, whether land, sea or air. As such, the QNV 2030 includes an emphasis on establishing environmental institutions that can serve as the guardians of Qatar’s environmental heritage. The QNV 2030 also emphasizes the importance of increasing citizens’ awareness of their role in protecting the country’s environment for their children and the nation’s future generations. The State of Qatar has chosen to pursue the path of sustainable development, making it the focus of the Qatar National Development Strategy. Given the large-scale industrialization and the limited land availability, the urban environment will be crucial in maintaining native species. The presence of heavy petrochemical firms in Qatar necessitates stressing on researches related to biomonitoring of environmental ecosystem with the aim to understand and provide impactful solution for different environmental challenges affecting Qatari health, and damages to local ecosystem. Due to the extreme temperatures and salinities in the Gulf region, the national biodiversity has adapted to survive under extreme conditions. Furthermore, the barriers that isolate the Arabian Gulf have created an environment that is rich with endemic species that are specific to the region. As such, this project aimed to cover the gap in the genomic analysis of Qatar’s rich environment. The goal was to decipher the genetic background of different animal species, marine and environmental species specific to the Qatari environmental landscape that has been previously described by Qatar University’s environmental science center. The study also deciphered the microflora in marine environment that is an important building block of the environment and an indicator of its richness. The outcome from this study is to help in preservation of important species in Qatar and will guide the establishment of a national genomic habitat platform in Qatar

scholarly journals МОНГОЛЫН ЗАГАСНЫ АЙМГИЙН ЗАРИМ ТӨРӨЛ ЗҮЙЛИЙГ МОЛЕКУЛ-ФИЛОГЕНЕТИКИЙН АРГААР СУДАЛСАН ДҮНГЭЭС

2016 ◽  
pp. 5-13
Author(s):  
Аюур Дулмаа
Keyword(s):  
Large Scale ◽  
Fish Fauna ◽  
Fish Population ◽  
Ocean Basin ◽  
Population Characteristics ◽  
Ecological Specialization ◽  
Important Species ◽  
Closed Basin ◽  
Central Asian ◽  
Water Ecosystems

The Joint Mongolian-Russian Complex Biological Expedition is the biggest biological expedition in iterms of Water ecosystems of Mongolia. Over 40 years, large - scale integrated research has been analysis of natural and antropogenic processes and basic principles of rational exploitation. The aim is to fulfill complex hydrobiological, ichthyological and hydrological estimation of water resources state and propose measures for their protectionInterrelation of global and local geo-climatic changes in territory of Mongolia in Cenozoic Era with evolution of endemic fishes of genera Oreoleuciscus is analysed. It is shown , that all basic stages of geo-climatic transformation directly defined occurrence, formation of species, morpho-ecological specialization and formation of geographic areas of species and their population organization.Evolutionary and population characteristics of the Altai osmans are given on the basis of genetically analysis of locuses mtDNA and the nuclear locuses coding isoenzymes.According to recent findings and investigations fauna of Lampreys and fishes of Mongolia consist of about 75 species of 14 families and 2 orders. 11 new species of fish, including one new invader bream (Abramis brama) were noted in the country waters last 15 years. According to new results two species of the Altai osmans (Oreoleuciscus angusticephalus, O.dsapchynensis) and one species of graylings (Thymallus arcticus) are excluded from the list of fish fauna of Mongolia. Recently Almai osmans were found not only in the waters of the Central-Asian closed basin, but also in rivers and small lakes of the Selenga River basin (Dgebuadze, Dulmaa, Munkhbayar 2003; Dulmaa A.,Munkhbayar Kh.Nakagawa M.,2004).Esseantial climate change and increasing of human impact transformed Mongolian fish population during last 40 years. As a result bias on ratio of ecological guilds, pathology number increasing, local diversity declining, and changes in species distribution, rate of growth and fecundity of many species of fish are observed. One of the main factors, influencing on fish populations, is gold mining in the rivers Arctic Ocean basin. In new conditions more attention demand both commercially important species as taimen, lenok, Baikal and Amur graylings, Amur carp, goldfish, Amur catfish, Amur and northern pikes, minnows, burbot, dace, and endangered and endemic species as Altai osman, Mongolian upper Enisey and Kosogol graylings, stone loaches and sculpin.Anthropogenic load on the water bodies of the Central-Asian closed basin is connected, first of all, with the constraction of hydraulic structures (dams in the basin of the Kobdo and Dzavkhan rivers), increase of pullution, and intensification of fishery. Evaluation of modern condition of water ecosystems and fish population parateters of this basin remains the main purpose of research for the years immediately ahead.

Age, gender and season dependent 25(OH)D levels in children and adults living in Istanbul

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Zeynep Yildiz ◽  
Özlem Hürmeydan ◽  
Özlem Çakır Madenci ◽  
Asuman Orçun ◽  
Nihal Yücel
Keyword(s):  
Large Scale ◽  
Population Characteristics ◽  
Healthcare Outcomes ◽  
Hydroxyvitamin D ◽  
Large Scale Data ◽  
Laboratory Results ◽  
Turkish People ◽  
Adults And Children ◽  
25 Hydroxyvitamin D ◽  
Scale Data

AbstractBackgroundWe evaluated population characteristics of serum 25-hydroxyvitamin D (25(OH)D) levels and determined the influence of age, gender and season in an extensive dataset.Materials and methodsLaboratory results of 103,509 adults and 19,186 children were retrospectively evaluated. Study group was classified regarding ages as; <40, 40–50, 50–60 and >60 years for adults and 0–1, 1–12 months,1–3, 4–6, 7–9, 10–12, 13–15 and 16–18 years for children. Seasonal values were also determined. Levels were measured by Architect i1000 SR (Abbott Diagnostics, USA).ResultsThe median (2.5–97.5 percentiles) of 25(OH)D levels were 38.75 (9.5–158.25) nmol/L for adults and 43.25 (11.25–125.5) nmol/L for children. There were significant gender differences for both adults and children. Values differed significantly among age subgroups (p’s < 0.01). A total of 63% of adults and 59.5% of children had 25(OH)D levels below 50 nmol/L (p < 0.001). 25(OH)D levels were significantly lower in the winter compared with summer (p’s < 0.001). Even levels in summer were moderate deficient for all group.ConclusionThe rate of 25(OH)D deficiency was remarkable during the whole year. This will provide large-scale data about 25(OH)D status in Turkish people and may contribute to the prevention and treatment of this condition for better healthcare outcomes.

Size Distributions and Growth of the Fan-shell Pinna bicolor Gmelin (Mollusca : Eulamellibranchia) in South Australia

1979 ◽  
Vol 30 (1) ◽  
pp. 25 ◽  
Author(s):  
AJ Butler ◽  
FJ Brewster
Keyword(s):  
South Australia ◽  
Adductor Muscle ◽  
Size Distributions ◽  
Limited Data ◽  
Length Frequency ◽  
Age Classes ◽  
Frequency Distributions ◽  
Growth And Survival ◽  
Random Samples ◽  
Variable Success

Fourteen random samples of Pinna bicolor were collected over a period of 31 months from 6 m depth in Gulf St Vincent off Edithburgh, South Australia. The length-frequency distributions suggest that: P. bicolor larvae settle in spring but with variable success; growth of newly settled young is rapid over summer; by age 1 year their modal shell length is about 20 cm; by age 2 it is about 26 cm; they may survive substantially longer than 3 years so that a length-class of mode c. 35 cm is always present and is composed of several age-classes not necessarily equally represented. These suggestions are corroborated by limited data on adductor muscle scars, the development of epibiota on the shells, and the growth and survival of tagged animals over 9 months.

scholarly journals Induced sterility in fish and its potential and challenges for aquaculture and germ cell transplantation technology: a review

Biologia ◽  
2016 ◽  
Vol 71 (8) ◽  
Author(s):  
Amin Golpour ◽  
Mohammad Abdul Momin Siddique ◽  
Diógenes Henrique Siqueira-Silva ◽  
Martin Pšenička
Keyword(s):  
Germ Cell ◽  
Cell Transplantation ◽  
Large Scale ◽  
Hormonal Treatment ◽  
Important Species ◽  
Genetic Ablation ◽  
Germ Cell Transplantation ◽  
Commercially Important ◽  
Alternative Approaches ◽  
Hormone Signalling

AbstractInterest in reproductively sterile fish in aquaculture has prompted research into their production. Several methods are available for inducing sterility and optimizing its application in the global fishery industry. Sterilization can potentially be accomplished through irradiation, surgery, or chemical and hormonal treatment. Alternative approaches include triploidization, hybridization, and generation of new lines via advanced biotechnological techniques. Triploids of many commercially important species have been studied extensively and have been produced on a large scale for many years. Novel approaches, including disruption of gonadotropin releasing hormone signalling and genetic ablation of germ cells, have been developed that are effective in producing infertile fish but have the disadvantage of not being 100% reliable or are impractical for large-scale aquaculture. We review currently used technologies and recent advances in induction of sterility in fish, especially those intended for use in germ cell transplantation. Knowledge of the implications of these approaches remains incomplete, imposing considerable limitations.

scholarly journals Correlation-Centric Network (CCN) representation for microbial co-occurrence patterns: new insights for microbial ecology

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Pengshuo Yang ◽  
Chongyang Tan ◽  
Maozhen Han ◽  
Lin Cheng ◽  
Xuefeng Cui ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Large Scale ◽  
Network Connectivity ◽  
Small Range ◽  
Environmental Disturbance ◽  
Target Species ◽  
Important Species ◽  
Metagenome Analysis ◽  
Occurrence Patterns ◽  
Edge Networks

Abstract Mainstream studies of microbial community focused on critical organisms and their physiology. Recent advances in large-scale metagenome analysis projects initiated new researches in the complex correlations between large microbial communities. Specifically, previous studies focused on the nodes (i.e. species) of the Species-Centric Networks (SCNs). However, little was understood about the change of correlation between network members (i.e. edges of the SCNs) when the network was disturbed. Here, we introduced a Correlation-Centric Network (CCN) to the microbial research based on the concept of edge networks. In CCN, each node represented a species–species correlation, and edge represented the species shared by two correlations. In this research, we investigated the CCNs and their corresponding SCNs on two large cohorts of microbiome. The results showed that CCNs not only retained the characteristics of SCNs, but also contained information that cannot be detected by SCNs. In addition, when the members of microbial communities were decreased (i.e. environmental disturbance), the CCNs fluctuated within a small range in terms of network connectivity. Therefore, by highlighting the important species correlations, CCNs could unveil new insights when studying not only the functions of target species, but also the stabilities of their residing microbial communities.

scholarly journals Growing Season Length as a Key Factor of Cumulative Net Ecosystem Exchange Over the Pine Forest Ecosystems in Europe

2015 ◽  
Vol 29 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Alina Danielewska ◽  
Marek Urbaniak ◽  
Janusz Olejnik
Keyword(s):  
Air Temperature ◽  
Measurement Data ◽  
Growing Season ◽  
Pine Forest ◽  
Pine Forests ◽  
Net Ecosystem Productivity ◽  
Ecosystem Productivity ◽  
Season Length ◽  
Important Species ◽  
Growing Season Length

Abstract The Scots pine is one of the most important species in European and Asian forests. Due to a widespread occurrence of pine forests, their significance in the energy and mass exchange between the Earth surface and the atmosphere is also important, particularly in the context of climate change and greenhouse gases balance. The aim of this work is to present the relationship between the average annual net ecosystem productivity and growing season length, latitude and air temperature (tay) over Europe. Therefore, CO2 flux measurement data from eight European pine dominated forests were used. The observations suggest that there is a correlation between the intensity of CO2 uptake or emission by a forest stand and the above mentioned parameters. Based on the obtained results, all of the selected pine forest stands were CO2 sinks, except a site in northern Finland. The carbon dioxide uptake increased proportionally with the increase of growing season length (9.212 g C m-2 y-1 per day of growing season, R2 = 0.53, p = 0.0399). This dependency showed stronger correlation and higher statistical significance than both relationships between annual net ecosystem productivity and air temperature (R2 = 0.39, p = 0.096) and annual net ecosystem productivity and latitude (R2 = 0.47, p = 0.058). The CO2 emission surpassed assimilation in winter, early spring and late autumn. Moreover, the appearance of late, cold spring and early winter, reduced annual net ecosystem productivity. Therefore, the growing season length can be considered as one of the main factor affecting the annual carbon budget of pine forests.

scholarly journals Towards a hydrogen economy – a sustainable pathway for global energy transition

2021 ◽  
Vol 28 (2) ◽  
pp. 102-107
Author(s):  
Jeffrey Kwok
Keyword(s):  
Large Scale ◽  
South Australia ◽  
Energy Transition ◽  
Thermal Engineering ◽  
Hydrogen Economy ◽  
Carbon Abatement ◽  
Electric System ◽  
Industrial Sectors ◽  
The Uk ◽  
Scale Integration

Hydrogen is receiving increasing attention for achieving carbon abatement in various sectors, including transport, logistics, thermal engineering and industrial feedstock, etc. Hydrogen can also support distributed power supply that raises national energy security. Both commercial and industrial sectors share a common vision that increasing the cost-effectiveness of renewable hydrogen represents their strategic achievement towards substantial sustainability. This paper explains how hydrogen can play seven roles in the energy transition which include large-scale integration of renewable energy into the power grid, medium for storing and distributing energy across sectors and/or regions, a buffer to increase the electric system resilience and clean fuel for fuel cell vehicles to decarbonise transport. Besides, hydrogen can decarbonise building energy consumption and serve as feedstock using captured carbon. Power Assets Holdings Limited (PAH), a global investor in energy and utility-related business, has identified a hydrogen economy as a strategic vision in its business plan for zero carbon readiness in 2035 and a carbon-free business model in 2050. In this paper, the features and attributes of different hydrogen projects, such as H21 and InTEGRel in the UK and Hydrogen Park in South Australia, are discussed to demonstrate the commercial deployment of hydrogen power.

Residency and movement dynamics of southern rock lobster (Jasus edwardsii) after a translocation event

2015 ◽  
Vol 66 (7) ◽  
pp. 623 ◽  
Author(s):  
Adrian Linnane ◽  
Shane Penny ◽  
Peter Hawthorne ◽  
Matthew Hoare
Keyword(s):  
Large Scale ◽  
South Australia ◽  
Rock Lobster ◽  
Directed Movement ◽  
Translocation Event ◽  
South West ◽  
Movement Dynamics ◽  
Close Proximity ◽  
Jasus Edwardsii ◽  
Almost All

Previous movement studies on the southern rock lobster (Jasus edwardsii) have all involved releasing tagged animals at the point of capture. In 2007, 5298 lobsters, in total, were tagged and translocated from an offshore site (>100-m depth) to two inshore sites (<20-m depth) in South Australia. After a period of 735 days, 510 (9.6%) had been recaptured. The majority of translocated lobsters were located within close proximity to the release points, with 306 (60%) having moved <5km. Of the remainder, 133 (26%) were recaptured within 5–10km, with a further 71 (14%) individuals having moved >10km. Movement patterns were highly directional in nature, with individuals consistently travelling in a south-west bearing, regardless of distance moved. In almost all cases, movement was from inshore to offshore sites, with female lobsters travelling significantly further (mean 5.66km ±6.41s.d.) than males (mean 5.02km ±9.66s.d.). The results are consistent with previous large-scale tagging studies of J. edwardsii, which indicated high residency levels but with occasional directed movement by some individuals.

Challenges for Diadromous Fishes in a Dynamic Global Environment

2009 ◽  
Keyword(s):  
Chinook Salmon ◽  
Large Scale ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Pink Salmon ◽  
Commercial Catch ◽  
Atmospheric Processes ◽  
Energy Transfers ◽  
Salmon Production ◽  
The Impact

<em>Abstract</em>.-Pacific salmon <em>Oncorhynchus </em>spp. catches are at historic high levels. It is significant that one of the world's major fisheries for a group of species that dominates the surface waters of the subarctic Pacific is actually very healthy. Natural trends in climate are now recognized to cause large fluctuations in Pacific salmon production, as shown in historical records of catch and recent changes probably have been affected by greenhouse gas induced climate changes. Pink salmon <em>O. gorbuscha </em>and chum salmon <em>O. keta </em>production and catch has increased in the past 30 years and may continue in a similar trend for for the next few decades. Coho salmon <em>O. kisutch </em>and Chinook salmon <em>O. tshawytscha </em>catches have been declining for several decades, particularly at the southern end of their range, and they may continue to decline. In the 1970s, hatcheries were considered to be a method of adding to the wild production of coho and Chinook salmon because the ocean capacity to produce these species was assumed to be underutilized. Large-scale changes in Pacific salmon abundances are linked to changes in large-scale atmospheric processes. These large-scale atmospheric processes are also linked to planetary energy transfers, and there is a decadal scale pattern to these relationships. Pacific salmon production in general is higher in decades of intense Aleutian lows than in periods of weak Aleutian lows. Key to understanding the impact of climate change on Pacific salmon is understanding how the Aleutian low will change. Chinook and coho salmon are minor species in the total commercial catch, but important socially and economically in North America. A wise use of hatcheries may be needed to maintain abundances of these species in future decades.

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