Browsing articles in "Excessive Fishing"
May 30, 2013
Sally

Taking Care of Problems Associated with Managing fish Aquaria

This is a continuation of our previous post ‘How to Solve Problems Associated with Aquarium Setups’.

Managing an aquarium has obvious challenges, but they can always be taken care of using simple processes that you can easily do once in a while. Taking care of these challenges that crop up ensure your long term success in the fish industry.

Temperature of the aquarium

Depending on where your aquarium tank is located, you can experience variations in temperatures at different times of the day. You can use a heater to prevent the tank from being too cold for the fishes.

To make the tank appropriate for the fishes during hot seasons, then a chiller could be necessary – though a bit expensive. Alternatively, you can turn off the lights during hot days. You can also induce evaporation by leaving the tank lids open; this way evaporation induces cooling in the aquarium tank.

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Gasping of Fishes at Water Surface

When fishes gasp at the surface of the water, it could be as a result of the presence of large amounts of ammonia and/or low oxygen. The levels of ammonia could increase as a result of the death of a fish, plant or even accumulation of wastes in the tank.

You simply have to manage the waste in the water without damaging the beneficial bacteria present in the water, that help decay and breakdown wastes. You should also suspend feeding so you don’t stress the entire system.

As for low oxygen levels, simply allow for aeration over the surface of the aquarium tank so that more dissolved oxygen enters the water.

May 30, 2013
Sally

How to Solve Problems Associated with Aquarium Setups

Following the challenges we have in our ecosystem today especially with marine life and excessive fishing in our waters; it has become paramount we contribute to the amount of fishes meant for human consumption. This means that we have to set up aquariums for raising fishes.

Raising fishes in an aquarium has very high economic benefits; however, this also comes with its attendant challenges. Here, we look at some of the problems and their solutions.

You will observe that most of the problems have to do with the quality of water in which the fishes are raised in. The truth is that water is the most important part of successfully managing an aquarium.

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Growth of Algae

As long as you are raising fishes in an aquarium, you are going to experience algal growth. The challenge may not be in making the aquarium tank completely free of algae, but rather being able to control its growth.

To reduce or eliminate algae, you simply control what they need to grow – sunlight and food. You can also introduce fishes as well as snails that feed on algae. This way they are reduced drastically in the aquarium tank.

Green or Cloudy Water

You can experience unclear waters in your aquarium for some certain reasons. It could be as a result of fine particles. These usually settle down after some time or days. Dissolved minerals also contribute to cloudiness in your tank.

When this happens, check the pH of the water; if it is high, then you will have to lower it using special water pH conditioner. You can also decide to change your source of water.

These are not the only challenges you might encounter, but as your experience grows, you’ll be able to handle more as they come.

May 20, 2013
Sally

Excessive Fishing – Why Overfishing is a Serious Problem

Fish serves as one of the world’s main source of food for many people around the world. They are packed with proteins and are great source of nutrients in a healthy diet. However, more and more fishes are being overfished all around the world, causing its population to drop significantly over the recent years.

Excessive fishing is caused when more fishes are caught than the amount that is required to reproduce its population. Fishing fleets that are used to catch fish are mostly two to three times larger than the sustainable amount the world’s oceans have. When this happens, there isn’t enough adult fish to reproduce, causing its number and supply to deplete substantially. If this is allowed to happen over an extended period of time, the ocean may be deprived of fish altogether for there isn’t enough fish to replenish the population.

 Fisherman emptying catch into fish pound on 20m trawler in North Sea, UK

Overfishing not only causes the fish population to drop, but it can also affect other marine life in the ocean. When fishing methods that are employed are dangerous to other marine life, it can cause a disruption in the balance of the ocean’s health.

Methods like bottom trawling is one of the most damaging methods to catch fish for the heavy net that is trawled along the bottom of the ocean floor can destroy other marine life, coral reefs and the ocean’s bed. Some of these marine systems will take a very long time to recover and in some cases like the coral reefs, they may not recover at all, leaving us with a barren sea.

Despite a huge demand on fishes in the market, there needs to be a controlled system in the amount of fish being caught. This needs to be implemented so that the entire fish population won’t disappear.

May 5, 2013
Sally

The Ultimate Shark Experience

Do you think you can experience the adrenalin pump associated with deep diving the oceans to study sharks? Sharks are fascinating animals worth researching and studying and this is because of their unique behavior.

Sharks are usually found in coastal regions of the major oceans. Weighing as much as 4 tons and getting to 23 feet in length, they are known for their large sizes. They prey on whales, seals and dolphins. Sharks do not prey on humans, because their digestive system is slow to break down the large amounts of bones as well as fat and muscles in humans.

Humans die when they experience loss of blood from sharks’ bite, and not really from complete consumption or loss whole body parts.

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However, these beautiful species are under threat from extinction in the oceans, and conservation work has increased in recent years to protect their species.

There are a number of organizations in the world that work in preserving sharks. These train volunteers in the research, conservation, behavior and biology of sharks, as well as providing shark tourism through ocean deep dives.

It is a privilege of a lifetime to enjoy observing the behavior deep inside water, getting information about their sex, markings and sizes of the sharks. With steel cages lowered into water, you will be surrounded by sharks while in the ocean and relish the presence of these large creatures.

This is one way of participating in conservation work that helps preserve the species of these special animals, while also getting quality wildlife education in the process.

Apr 17, 2013
Sally

Sustainability of the World’s Ocean Fishes

Research studies have shown that the population of fishes presents in our ocean today is just 10 percent the number they were before the boom in industrialization. This means that they are currently under pressure, and scientists have warned that by 2050, the fisheries could collapse significantly.

Although large populations of fishes have demonstrated the ability to recover, especially when managed properly; there is need to enforce regulations that protect fishes from excessive fishing and ensure their sustainability.

EU fishing quota : Fishermen in Spain

To contribute to the sustainability of fishes, it has to start with providing more information to the consumers. By identifying fishes properly via tracking, from the ocean to the plate, the consumers will be able to know where and when fish was caught.

Also, by tracking, fishes can be labeled properly so that the consumers have the choice over the kind of fish they want to eat. Sustainability can really be maintained when we know where fishes come from and exactly how it was caught.

Take for instance, a fish that was caught about 30 days ago and one that was caught just yesterday are both called ‘fresh fishes’ by a fish seller.

When consumers understand the importance of eating only the really ‘fresh fishes’, and also understand its distribution, then the fishing process will gradually become more sustainable.

To achieve this, a tracking technology could help answer some sustainability questions such as: was the fish caught using a fish aggregating device, and how legal was the catch?

With that, the sustainability of fishes in our ocean can begin to be taken more seriously.

Apr 1, 2013
Sally

Earth’s Future Climate – Hopeful of Bleak?

Over the years, we have seen our beautiful world suffer from serious emissions that have threatened the natural beauty of our environment. The emission from the earth has contributed to the warming of the earth’s climate.

Scientists have already projected that if the emissions persist, then we could see the earth’s temperature increasing up to an additional 4 degrees later in this century.

So are we doing enough to stem the tide? The truth is that if tough decisions are not taken quickly and drastic, then we’ll soon be living in crises mode.

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Feasible ways of halting climate change:

The United Nations Environment Programme (UNEP) discovered that by 2050 the emissions from the earth need to be about 50% below its current levels; in their Emissions Gap Report of 2012. So, how can this gap be closed up?

There has to be total compliance with every agreement regarding reduction of green house emissions. The UNEP and other bodies concerned have to implement policies that not only go a long way to achieving emissions objective; but that are also interesting for the concerned nations to pursue.

Take for instance, implementing a better performance standard for public vehicles and buses, will obviously bring down carbon emissions, benefit the environment and enhance quality of air in cities.

Also, there has to be concerted effort in helping under-developed and developing countries adopt a low carbon economy. This can be achieved through quality policy making, and creative information technology systems.

 

Jun 29, 2012
Julia

Third Technical Meeting to Solve Fishing Dispute in Gibraltar

 

Today will be the third meeting of the two technical committees, without political representatives, who are negotiating for more than a month, the solution to the conflict affecting fishing sailors, Algeciras and La Linea fishing, in the waters surrounding the Rock of Gibraltar. In the last four months, this has caused great tension between Spain and Gibraltar.

The president of the Andalusian owners and representative of the Fishermen’s Association of Algeciras (Cádiz), Pedro Maza, said “The appointment on Friday may be the definitive”, but do not want to launch from the rooftops as “the meeting may be important. “Once we have kept the first two, I think there is little else to say,” Maza added. In that sense, Maza points to the need to return as soon as possible to” fish” because it is still important for families who get their source of living from fishing.

The goal was made clear on several occasions. The Spanish fishermen’s goal is to “return to the 1999 situation.” In particular, the agreement reached between the government of Caruana and Spain that had allowed a few months ago when the current Chief Minister, Fabian Picardo, broke the agreement unilaterally based on the laws of the environment of the colony.

“This fishing is not a problem. Someone must make a determination. We have already done everything we could do within the range we have,” Maza said, hoping that on Friday, “they can end this situation”.

Jun 13, 2012
Julia

Australia Will Create Largest Network of Marine Reserves

 

The Australian Government will create the largest network of marine reserves in the world and limit the exploitation of oil and fishing in sensitive areas to help protect the oceans.

The network will increase the number of reservations from 27 to 60 and will cover about 3.1 million square kilometers, more than a third of the ocean surrounding the country-continent.

“It is time that the world take a turn in the protection of our oceans,” announced the Minister of Environment , Tony Burke, noting that “Australia will lead the course” in favor of a more responsible management of marine and resources.

The minister stressed that many Pacific Island countries are concerned about the impact of mining activities and other resources in the oceans, so far not only responds to the need to “protect the environment” but is linked also to food security.

Under this plan, which must be subjected to a final consultation process before implementation in Australia, will expand the protection of animals such as whales, turtles and other endangered species including the gray nurse shark and dugong (sea mammal relative of the manatee).

Also, it aims to limit the oil and gas exploration, an activity that represents the engine of the Australian economy, and increase the protection of the reefs in the Coral Sea, off the coast of Queensland, which is home to the green turtles.

The initiative, announced a few days after the Rio Earth Summit +20, opens the possibility that the fishing industry in compensation claims around a $99.7 million.

According to the Executive in Canberra, the measure will affect only one percent of commercial fishing in the country.

But while there are “many interests at stake,” Australia has a “responsibility” as a country to lead global efforts to protect the oceans, said Burke.

The announcement sent alarm bells ringing in the fishing industry, which warned that the increase of protected areas will mean a greater volume of fish imported to the detriment of local industry.

For its part, the representative of the Australian Conservation Foundation, Chris Smyth, welcomed the measure, although he emphasized that the protected area will not be as extensive as he would have liked.

“There are many interests involved, the industry of oil and gas, commercial fishermen and amateurs as well as environmental groups,” he told ABC .

The new marine reserves announced by the Minister included the Perth Canyon, southwest of the country, “which is larger than the Grand Canyon,” although “the jewel in the crown” is the Coral Sea, northeast Australia .

The Coral Sea area and the adjacent Great Barrier Reef marine reserve representing the world’s largest, said the minister.

The director of the Australian Marine Conservation Society, Darren Kindleysides, said that in the Coral Sea can not be carried out activities such as oil and gas exploration, mining on the seabed and trawling.

The Coral Sea “has a long chain of coral atolls that are important for various species of fish and sharks,” said Kindleysides, who recalled that marine reserves help protect wildlife and biodiversity.

The creation of marine reserves is the highest level of protection and excludes extractive activities, although the movement of ships, tourism and recreational activities such as scuba diving are permitted.

In 2010, the tenth Conference of the Parties to the Convention on Biological Diversity, held in Nagoya (Japan) agreed that 10 percent of the world’s seas should be protected in 2020.

May 20, 2012
Julia

Maritime Consequences

Our oceans play a fundamental role in controlling Earth’s climate. This is because water is 1,000 times more dense than air and retains heat four times (this property is known known as “thermal inertia”). Oceans store large amounts of heat. Ocean currents transport heat around the globe, similar to the heating of a house. However, warmer seas also means the destruction of underwater ecosystems.

Rising temperatures are having a disastrous effect on the coral. In 1998, scientists announced that most of the coral is dying. In fact, large coral bands have disappeared from the coast of Florida.

Coral reefs are produced by tiny sea creatures called polyps. They have hard external skeletons made of calcium, which over the years, help to form large colonies. The coral forms around the world in warm waters over 20 degrees Celsius and generally at depths below 50 meters. The Great Barrier Reef is the largest and most famous coral reef that exists.

It is estimated that over a quarter of all marine fish are found in or around coral reefs occupy only 0.02% of the world’s oceans. This could explain why coral reefs are sometimes called the forest of the ocean. This is because up to 15% of all global shoal of fish are caught here. This results in dire consequences for local economies. But this loss is much deeper.

Another immediate consequence is the melting of the polar regions, which will increase the proportion of freshwater on the planet, also the water level will rise to four inches every twenty years or so, affecting countries with very large coastal areas.

The barrier acts as a breakwater to provide protection to the islands and coasts of the violent storms of the open sea, particularly during hurricane season. Of course, the temperature of the ocean also generates hurricanes, storms more powerful and feared in the tropics.

Hurricanes are large low pressure rotors, large enough to be seen from space. They bring torrential rains, storms and strong winds. Hurricanes raise their path sea level and often cause flooding in low-lying coasts. This phenomenon is known as “storm surge” and can reach up to 4 meters high.

Conditions must be necessary for the formation of a hurricane, the sea surface must be above 26.5 degrees Celsius. To be classified as a hurricane, typhoon or cyclone, the wind speed must be greater than 117 km / hour. About 50 tropical storms each year reach hurricane status.

If the oceans warm up, that number could double. Tropical atolls like the Maldives, rising less than 1.8 meters above sea level, could disappear forever. Along with its population of 270,000 people.

Feb 17, 2012
Penny

Necklace of death: Here’s what ocean waste does to marine animals (VIDEO)

A video made by Alaska Department of Fish and Game shows how oceans waste threaten marine animal lives.

A study on a species of seal called the Steller sea lion (Eumetopias jubatus), an endangered species living on the coast of southeastern Alaska, found that, often, these animals die from plastic or rubber bands that their hook or fishing gear used to catch salmon.

Between 2000 and 2007, researchers found 386 cases where animals died because of waste, but the number of victims seems to be much higher. In addition, experts argue that the same is true for other species of mammals, seabirds and turtles.

In Alaskan waters, Steller sea lions, northern fur seals well (Callorhinus ursinus) are the animals most affected by marine litter. However, unlike sea lions, seals Nordic seem to swallow hooks.

During an investigation, the scientists found that a population made up of nearly 500,000 seals that live on the island Pribilof northern summer and autumn, 100 copies were damaged waste.

Experts explained that in these areas, where sea currents converge, forming islands of waste that fish prefer them because they provide shelter. So the seals that eat these fish end up Foraging in piles of debris, injuring it. If adults are injured in search of food, babies become trapped in trying to play with the cable loop or plastic, which come as some loops.

To stop the disaster, under the slogan “Lose the Loop” (“Escape the trap”), experts recommend that before putting them away, to cut to pieces any cable or plastic debris that might catch these animals. Other proposed solutions to reduce the volume of waste discarded by ships and any material that could wrap around the neck of an animal.

Jan 7, 2012
Penny

Sea Shepherd: drones and a shipwreck

Specializing in hunting Japanese whalers boats of the southern seas, the NGO has recently established a quasi-military equipment, as drones joined the fleet.

Drones, they are small unmanned aircraft, with a range of several hundred hours, with a range of 300 km, and equipped with everything needed to espionage and Taken: GPS, cameras, and cameras.

Offered by two U.S. companies for recycling and maritime safety, drones allow boat crews to detect anti-whalers to hundreds of kilometers away, and discretion, the factory ships that make their way to Antarctica for the whale fishing.

Fishing, it is said often enough, been banned for years, but the Japanese continue to practice, claiming a scientific purpose in this large-scale slaughter.

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