Sea urchin - By: Marco Busdraghi

The coral reefs off of Hawaii are being smothered by tons of algae, and efforts have been made to help solve this dilemma. The answer comes from an unlikely source.. Sea Urchins. Sea urchins, commonly known as the “cows of the sea”, are being used along side a new underwater vacuuming system aptly named the “Super Sucker” in an attempt to finally start getting the algae off the reef and get them healthy again.

Researchers from the state Department of Land and Natural Resources Division of Aquatic Resources are pleased to announce that the project has been a success, as it has been using sea urchins alongside the Super Sucker for the past year in Kaneohe Bay.

“It exceeded our exectations,” Tony Montgomery, a state aquatic biologist commented. “It actually worked better than we thought.”

The project began in August of last year, where divers were manually removing the offending algae from the reef. Once harvested, the algae was then sucked up using the super sucker.. On another part of the reef however, a bunch of sea urchins were left to do their business. The results were that these cows of the sea were quite the eating machines. While the project is being deemed a success there is still a lot of algae to be removed, and Montgomery is remaining casually optimistic. “We will see how they do with thousands of pounds of algae to eat,” He said.

A recent study has unveiled that the King demoiselle (Chrysiptera rex) is actually three different species that recently diverged from each other.  (picture)

“This work, along with others, is starting to show that there is a lot more biodiversity in the oceans then we previously thought,” said Joshua Drew, a marine conservation biologist at the Field Museum of Natural History in Chicago and a member of the demoiselle study. “We really are in a situation where we are losing things before we even know they exist.”

The King demoiselle comes in a wide range of colours and patterns, but this alone is not enough to consider it several species. There are plenty of examples of fish that look very dissimilar from each other while still belonging to the same species.

However, what Dews’ colleagues discovered while doing field research in Southeast Asia was that the differences in appearance seemed to be linked to distinct geographical regions. In order to find out more, they decided to ship about a dozen King demoiselle samples to Drew, collected from three separate populations in Indonesia, the Philippines and the South China Sea.

In his laboratory, Drew analyzed the genetic composition of the samples, focusing on three different genes – one that has evolved slowly and two that have changed quickly over the years. What Drew found out was highly interesting: the two fast changing genes differed in the three geographical groups, but not the one slow changing one. This indicates that from an evolutionary perspective, the three groups diverged from each other quite recently.

“That means that this little fish we thought was broadly distributed has a mosaic of individual populations and each one is genetically distinct,” Drew explained. “That highlights how little we really know about how biodiversity on Earth is distributed.”

Earlier, scientists assumed that it was difficult for distinct populations of reef fish to form if they had small larvae easily caught by currents. It seemed reasonable to presume that larvae from many different geographical locations would intermingle with each other throughout the sea. New data, obtained from studies like the King demoiselle one, do however suggest that larvae often settle close to its point of origin.

The King demoiselle study will be published in the journal Coral Reefs.

http://springerlink.metapress.com/content/100407/?p=32f929fa7f60452da6d63226ec8898a6&pi=0

New coral reefs and hills have been discovered in Lónsdjúp, off Iceland’s eastern coast.

The corals, which come in two different colours, were stumbled upon by the Icelandic Marine Research Institute during a submarine research expedition in June.

The newfound coral area is located within a 40-square-kilometer vicinity at a depth of 200 to 500 meters. Unlike the corals that form reefs in tropical environments, the Icelandic corals are cold water species. Since no sunlight reaches them at these great depths they cannot carry out any photosynthesis. Instead, they survive by filtering nutrition from ocean currents.

“What makes these so special is that they take a very long time to grow; it takes a coral reef several hundred thousands of years to develop and in that time it creates a special habitat for other organisms,” says Steinunn Hilma Ólafsdóttir, an expert in demersal organisms.

All other known coral areas off the coast of Iceland are protected as nature reserves.

The reef in the picture is not the newly discovered reef. It is a picture from the great barrier reef.

Eleven suspected abalone poachers have been arrested in northern California, officials said Friday.

Since the tide was unusually low in Mendocino County, California Department of Fish & Game wardens were aware of the increased risk of poaching activity and kept their eyes on the coast line, including the coral reefs that had become exposed as the water disappeared.

At about 6.15 a.m. on Wednesday wardens noticed suspicious divers exiting waters near Caspar, south of Fort Bragg. Fish & Game Lt. Kathy Ponting, who runs the special operations unit, said her team drove to a spot near the suspicious divers and began surveillance.

Unaware of the wardens’ presence, the divers collected abalone from the reef and placed them in tall grass near the beach.

“Then a large van pulled up near the dive area and we watched them load up a bunch of abalone in plastic bags into the van,” Ponting said. The divers went back to the sea, while wardens decided to follow the van. After pulling it over, they discovered 50 abalones inside.

Abalones can sell for up to $100 dollars, but collection is strictly regulated since these molluscs need many years to develop. It can take 12 years for a specimen to reach the legal size. With a California fishing license and an abalone stamp card you are allowed to fetch 24 specimens per year, but no more than three per day. It is also illegal to collect them for sale, and anyone caught with a dozen or more will be considered possessing them with the intention of selling them.

Red Abalone. The only type that can be harvested.

When the van did not return to the divers, the alleged poachers loaded a pickup truck. The wardens followed the car to a nearby hotel and found coolers filled with abalone inside the divers’ hotel room. Most of the abalones were smaller than the legal size.

The wardens found a total of 166 abalones with the group, Ponting said. The suspects were booked on charges of felony conspiracy to harvest abalone for commercial purposes, which carries a fine of up to $40,000, said Game Warden Patrick Foy. Two vehicles also were

seized along with $6,000 in cash.

The black market for abalone is large and poaching is widespread, despite official efforts to eradicate the practise.

“We always only catch the tip of the iceberg, there is so much

abalone poaching going on because of the black market,” Ponting

explained. “We can pick almost any group and watch them poaching

abalone. It’s really unsettling.”

What is an abalone?

The abalone is a medium sized to very large edible sea snail prized for its exquisite flavour. There is roughly 100 known species world wide, all of them being gastropod molluscs belonging to the genus Haliotis. You may stumble upon a species marketed as “Chilean abalone” in the food trade, but this is not a real abalone; its name is Concholepas concholepas and it belongs to an entirely different family.

Since abalones are found in so many different parts of the world, they are known under many different names, such as abulón in Spanish, ormer in Jersey and Guernsey, pāua in

New Zealand, muttonfish or muttonshells in Australia, perlemoen in South Africa, and Venus’s-ears, ear-shells, and sea-ears in British and American English.

Abalones reach sexual maturity when they are comparatively small, but they won’t produce any significant amount of offspring until they grow bigger. A small abalone may release around 10,000 eggs at a time, which may sound like a big number but is dwarfed compared to the 11 million eggs released at a time by really large abalones. As a result of this, the removal of abalones from the sea before they have a chance to grow large is highly detrimental to the survival of the species.

Abalone has been farmed since the 1950s in Japan and China, and during the 1990s the practise spread to other parts of the world in response to dwindling wild populations. Today, it is possible to purchase farmed abalone and refrain from removing specimens from the wild. China and Japan are still major producers of abalone, but has been joined by Korea, Thailand, Australia, New Zealand, South Africa, Namibia, Iceland, Ireland, Canada, USA, Mexico, and Chile.

Catching abalone in California

As mentioned above, it is legal to fetch a certain amount of abalone per day and year in Californian waters if you have a California fishing license and an abalone stamp card. The abalone stamp card has 24 tags and captured abalones must be tagged immediately. The legal size is (a minimum of) seven inches (178 mm) measured across the shell. A person may be in possession of no more than three abalones at any given time. Other regulations to keep in mind are listed below. Always check with the California Department of Fish & Game before you go abalone hunting in California to find out if there have been any regulatory changes.

· Scuba diving for abalone is always prohibited; you may only pick them from the shore or use breath-hold techniques.

· Abalone may only be taken from April to November, not including July.

· You may only take Red abalones; no Black, White, Pink, or Flat abalones.

· You may not take any abalones south of the mouth of the San Francisco Bay.

· You may not sell any part of the abalone, including the shell.

· Only abalones still attached to the shell can be legally transported.

Zoology Prof. Yossi Loya at the Tel Aviv University in Israel has discovered that corals changes sex to survive periods of stress, such as high water temperatures. By observing the behaviour of Japanese sea corals he discovered that stressed female mushroom coral (fungiid coral) change gender to become males, and that male corals are much better at handling stress and fare better at surviving on limited resources. Not all females go through his change but many do and most of the population is therefore male during periods of intense stress.

Yossi Loya says: “We believe, as with orchids and some trees, sex change in corals increases their overall fitness, reinforcing the important role of reproductive plasticity in determining their evolutionary success. One of the evolutionary strategies that some corals use to survive seems to be their ability to change from female to male, As males, they can pass through the bad years, then, when circumstances become more favourable, change back to overt females. Being a female takes more energy, males are less expensive to maintain. They are cheaper in terms of their gonads and the energy needed to maintain their bodies. Having the ability to change gender periodically enables a species to maximize its reproductive effort.”

Loya’s discoveries have been published in the Proceedings of the Royal Society B. The professor hopes that this new knowledge will help coral farmers by allowing them to reproduce the hardy Fungiid corals more effectively.

Loya has been studying coral reefs for more than 35 years and won the prestigious Darwin Medal for a lifetime contribution to the study of coral reefs. He is also involved in coral rehabilitation projects in the Red Sea and is a professor at the Tel Aviv University in Israel.

This story might be a few days old but is still of interest and as I haven’t been able to get to it sooner I decided to post about it today.

Indonesia will allow trawling in selected areas for the first time in 30 years, maritime ministry official Bambang Sutejo announced on January 15. Trawling will be allowed off four areas of Indonesia East Kalimantan province, despite concerns about overfishing.

“There will not be overfishing this time as we’re only allowing small boats to trawl, and it’s not allowed in other parts of Indonesia,” says Sutejo, adding that legalising trawling would help fight illegal trawlers.

According to Chalid Muhammad of the independent Green Institute, trawling has a destructive impact on the marine environment and will intensify the problem with overfishing in Indonesian waters. “The total amount of fish caught is getting smaller each day while their imports are getting bigger,” says Muhammad.

Muhammad also feels a legalization of trawling will embarrass Indonesia as it prepares to host the World Ocean Conference. “If the government allows this, Indonesia will have a weak standing during the World Ocean Conference as sustainable management of marine resources will be discussed,” Muhammad said. The World Ocean Conference is an international gathering of policymakers and scientists held in May 2009.

Kalimantan is the Indonesian portion of the island Borneo, the third largest island in the world, and is divided into four provinces: East Kalimantan, West Kalimantan, South Kalimantan, and Central Kalimantan.

What is trawling?

Trawling is a fishing practise where fishing boats tow long nets behind them. These nets do not only scoop up commercially valuable fish, but all sorts of marine life. Trawling is divided into bottom trawling and midwater trawling, depending on where in the water column the trawling takes place. Bottom trawling is especially harmful to marine environments since it can cause severe incidental damage to the sea bottoms and deep water coral reefs.