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  • Sharks On Queensland Coast

    There has been a striking decline in the number of large sharks caught off Queensland’s coast over the past 50 years, suggesting that populations have declined dramatically. Our study, published today in the journal Communications Biology, used historical data from the Queensland Shark Control Program. Catch numbers of large apex sharks (hammerheads, tigers and white sharks) declined by 74-92%, and the chance of catching no sharks at any given beach per year has increased by as much as seven-fold. Coinciding with ongoing declines in numbers of sharks in nets and drum lines, the probability of recording mature male and females has declined over the past two decades. Tiger sharks have undergone a 74% decline in numbers over the past half century. Juan Oliphant/www.oneoceandiving.com Our discovery is at odds with recent media reports of “booming” shark numbers reaching “plague” along our coastlines. The problem with those claims is that we previously had little idea of what the “natural” historical shark population would have been. Why is the decline of sharks on the Queensland coastline a cause for concern? Large apex sharks have unique roles in coastal ecosystems, preying on weak and injured turtles, dolphins and dugongs, actively scavenging on dead whale carcasses, and connecting coral reefs, seagrass beds and coastal ecosystems. Australia’s mixed view on sharks As a nation, Australia has a long history with sharks. Some of the oldest stories in the world were written by the indigenous Yanyuwa people in the Northern Territory some 40,000 years ago, describing how the landscape of their coastal homeland was created by tiger sharks. European settlers in the late 18th and early 19th centuries further described Australian coastlines as being “chock-full of sharks”, and upon visiting Sydney in 1895, the US author Mark Twain remarked: The government pays a bounty of the shark; to get the bounty the fishermen bait the hook or the seine with agreeable mutton; the news spreads and the sharks come from all over the Pacific Ocean to get the free board. In time the shark culture will be one of the most successful things in the colony. With the rise of Australian beach and surf culture, and the growing population density in coastal communities in the mid-20th century, increasing numbers of unprovoked fatal encounters with sharks occurred along the Queensland and New South Wales coastlines. White sharks were extensively targeted and killed in “game fishing” tournaments, and harmless grey nurse sharks were hunted almost to extinction through recreational spearfishing in the 1950s and 1960s. Yet despite this long history of shark exploitation, the historical baseline populations of sharks off Australia’s east coast were largely unknown. Historical photograph of contractors measuring sharks removed from QSCP nets on the Gold Coast in the early years of the program (3rd November 1963). Through mesh nets and baited drumlines, the Queensland Shark Control Program targets large sharks, with the aim of reducing local populations and minimise encounters between sharks and humans. Records of shark catches dating back as far as the 1960s provide a unique window into the past on Queensland beaches. While we will never know exactly how many sharks roamed these waters more than half a century ago, the data points to radical changes in our coastal ecosystems since the 1960s. The exact causes of declining shark numbers are difficult to pinpoint, largely because of a lack of detailed records from commercial or recreational fisheries before the 2000s. The Queensland government also acknowledges that the program itself has a direct impact on shark populations by selectively removing large, reproductively mature sharks from the population. The data indicates that two hammerhead species – the scalloped and great hammerheads, both of which are listed as globally endangered – have declined by as much as 92% in Queensland over the past half century. Similarly, the once-abundant white sharks have also shown no sign of recovery, despite a complete ban on commercial and recreational fishing in Queensland, implemented more than two decades ago. The idea that shark populations are reaching “plague” proportions in recent years may represent a classic case of shifting baseline syndrome. Using shark numbers from recent history as a baseline may give a false perception that populations are “exploding”, whereas records from fifty years ago indicate that present day numbers are a fraction of what they once were. Our results indicate that large shark species are becoming increasingly rare along Australia’s coastline. We should not be concerned about a “plague” of sharks, but rather the opposite: the fact that previously abundant apex shark species are increasingly at risk

    Published: 1 day ago by masonnatural

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  • kratom Weighing Its Pros and Cons

    Everything has both a good and a bad side so does kratom powder. Today, we are going to assess all its benefits and downsides in this post so you can access the product better before buying it. However, before starting, we will take you a little back and share how this powdered form of kratom came into existence and how the best quality kratom powder is manufactured. Without any more delay, let's get started.  

    Published: 11 days ago by kravekratom

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    1 comment

  • How Schools Can Help Feed Nigeria

      The United Nations has estimated that by 2050, the world’s population will be around 9 billion. Sub-Saharan Africa has been reported as the continent to experience the highest possible growth. Nigeria is currently the most populous nation in Africa and this position is not likely to change. With billions of naira spent, even now, on food importation (rice, wheat, fish, etc.) into the country, feeding the teeming population in a sustainable manner calls for concern for two main reasons among many. First, there is an acute rural-urban migration of young people because of the perceived ‘greener pastures’ in the cities, According to FoxiesEssay, leaving behind a generation of aging rural farmers. Second, despite the critical unemployment situation in the country, majority of the urban youth do not pitch their tent in the agriculture space as they do not see the potential in agriculture as a career of choice. In spite of these two critical challenges however, the world is seriously shifting focus to Africa as the continent to make happen the desired increase in food production because of the vast human resources and large expanse of uncultivated arable land. Agriculture: Attractive to the youth? I doubt! By default, or as required by nature, everyone eats. But why has a greater percentage of the youth decided to not to engage in agriculture? The truth is, the youth are not to blame, and here is why: •    Perception: The image most people have of agriculture is that of the uneducated rural farmer who engages in subsistence farming, and this image is associated with hard labour and poverty. Who would want to look haggard and unkempt, tend to animals or crops, and still be at the mercy of those who would purchase them? •    Parental influence: Today, a lot of parents invest heavily towards their children’s education from basic through tertiary education. This is especially true in a country like ours where public (government owned) schools at all levels have lost their once coveted glory. Education is not cheap; parents want the best for their children, so in choosing careers, they tailor their children towards choices they are convinced promise economic gains. They guide their children to pursue professional courses so that they can be competitive in the market place. Unfortunately, agriculture is not seen as an appropriate choice. •    Peer Pressure: The youth see their peers enjoy economic prosperity and career progression in other sectors, and they want to emulate them. The entertainment, ICT, financial services, telecom and oil sectors are always first to come to mind for youths. To many, dream careers are not in agriculture. What then should be done? In order for young people to see the gain in choosing careers in different aspects of agriculture, there has to be more pragmatic approaches by the government, parents and importantly, schools. It is now a collective responsibility to attract intelligent and vibrant young minds we need to transform the sector and make it more viable in terms of providing sufficient food for the nation and generating income from exports. Our students need to know that agri-business goes beyond production. It includes post-harvest handling and processing (including storage), marketing and so on, until it gets to the final consumer. Government has to continually work to strengthen various institutions within the agriculture sector, as well as research and develop decent jobs (careers) along the value chain of different agricultural enterprises. Do schools still have the Young Farmers’ Club? This can be rekindled, but with a difference. Beyond growing vegetables, keeping poultry or some rabbits in the school farm, students can gain much exposure by visiting established agri-businesses. This would help them better appreciate the value chain and see different professionals within the agriculture industry. In partnership with schools, parents also have a lot to do in encouraging their children to take up careers in agriculture by helping them see the vast potential in the sector, and more importantly, making them realise that the future of the sector, and of Nigeria relies on them.

    Published: about 1 month ago by levisqrua

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  • http://supplementsbucket.com/thermo-burn

    Thermo Burn Language by Dr. Hendry.   Susan Craftsman, a world-renowned nutritionist also vocal her instrument. It focuses honours and Thermo Glow muscular women's personalty front not only on the effectualness of capsules but on their area. "Such coefficient deprivation in one month could significantly impress the process of the interior meat and the exercise of the uncastrated organism. Yet, in the person of this cerebration, the practicing ingredients modify the body for the sacrifices and increase the layer of metabolism – exclusive thanks to this, the body can get rid of 10 kilograms of fat per month, without partisanship to health" Thermo Damage Reviews:     http://supplementsbucket.com/thermo-burn  

    Published: 2 months ago by johnnnnnn

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    1 comment

  • Đèn downlight âm trần panel 59511 2019

    đèn downlight panel vô cùng mỏng 59511 12w Philips luôn là 1 sự thay thế lý tưởng cho các dòng đèn điện truyền thống. với ánh sáng với màu sắc thiên nhiên và sự vượt trội về khả năng hà tiện điện đèn LED hiện tại được đa số gia đình và khách công trình lựa chọn. Đèn sở hữu mầu sắc ánh sáng với bước sóng là 2700K/ 4000K / 6500K tương ứng với 3 kiểu màu sắc là vàng, trung tính và trắng   Điểm mạnh chính đèn âm trần rất mỏng 59511 Philips - Hiệu quả chiếu sáng cao: với đèn LED 80% năng lượng điện được chuyển hóa thành ánh sáng và 20% năng lượng được chuyển thành năng lượng nhiệt và những dạng năng lượng khác, với thông thường 80% năng lượng được chuyển thành năng lượng nhiệt, chính bởi vậy đèn downlight âm trần panel siêu mỏng 59511 12w với khả năng tần tiện điện hơn rất nhiều so mang những bóng đèn thường ngày. - Thân thiện với môi trường: ko mang thủy ngân, không phát ra tia cực tím ánh sáng an toàn ko phát ra ánh sáng xanh bởi thế an toàn có gia đình sở hữu trẻ nhỏ. - An toàn mang người sử dụng: không phát ra tia cực tím, ánh sáng ổn định ko lập loè sẽ ko ảnh hưởng đến mắt của bạn.Bên cạnh ấy ánh sáng phát ra từ đèn downlight panel mỏng 59511 12w Philips còn vô cùng thiên nhiên ko cho bạn cảm giác nhức mắt. - Chip led: đèn led panel cực kỳ mỏng 59511 12w Philips được chế tạo dựa trên khoa học tiên tiến và tiền tiến hiện tại sở hữu mắt chip led có thể chiếu sáng làng nhàng khoảng 20,000 giờ ở điều kiện tiêu chuyên nghiệp. - tuổi thọ cao: life time của đèn mang thể lên đến 20,000 giờ tương đương sở hữu việc đèn phát quang ở khoảng thời kì 10 năm trong đấy mỗi ngày phát sáng trung bình 8h.Chính bởi thế loại này được nhà phân phối philips tự tín bảo hành tận 24 tháng. - mầu sắc ánh sáng đa dạng: đèn downlight panel 59511 12w philips có 3 kiểu đèn cho ra 2 chiếc ánh sáng khác nhau để quý khách hàng lựa chọn đèn phát quang cho không gian cho phù hợp: sở hữu chiếc đèn nhiệt độ màu 2700K sẽ cho ánh sáng màu vàng ấm, đèn LED với nhiệt độ màu 4000k sẽ cho ánh sáng trắng ấm , 6500K sẽ phát sáng sáng trắng.  

    Published: 2 months ago by sonnguyen2014

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  • BAL Rating Explanation

    Australia among other tropical nations have dependably had an adoration/detest association with bushfires. All through the hotter long periods of the year, inhabitants situated in the northern piece of the nation encounter a tropical atmosphere. Bushfire occurrences exceedingly happen amid dry seasons, causing property harm and even loss of human life best case scenario. 

    Published: 6 months ago by info4all

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    3 comments

  • What Is Online Trading System

    An trading system is a gathering of particular parameters that consolidate to make purchase and offer signs for a given security. Exchanging frameworks can be produced utilizing various advances, including Microsoft Excel, MATLAB®, TradeStation, R, Python, and different stages and dialects. The purchase and offer signs from these stages may show up in a record for you to execute or be automatically executed utilizing a financier that backings computerized exchanging.

    Published: 6 months ago by tradingtips

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  • Trading Stock For extra Income

      How to make Money in stock market is the most popular question comes in mind of beginners’ and advanced traders all they want is make a profitable income from stock market. What is really important to learn  is how not to lose money stock market trading and this is real and most considerable secret in stock market in order to get success. How to make Money in stock market is the most popular question comes in mind of beginners’ and advanced traders all they want is make a profitable income from stock market. What is really important to learn  is how not to lose money stock market trading and this is real and most considerable secret in stock market in order to get success.

    Published: 6 months ago by tradingtips

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  • Golden Goose Superstar How many

    Golden Goose VIP www.goldengooser.com

    Published: 6 months ago by goldengooservip

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  • AS 3959-2009

    The point of the private building standard Australian Standard, AS 3959-2009, is to make strides the capacity of structures to withstand assault from bushfires. This gives more noteworthy insurance to the inhabitants of a building while the fire front goes and in addition to the building itself.  

    Published: 6 months ago by info4all

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    28 comments

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