Dwarf sea horse

There are tens of thousands of dwarf seahorses trying to survive in the oil infested Gulf of Mexico, and a researcher from the University of British Columbia is saying that their difficulties serves as a warning to not let BP to expand its operations to the West Coast.

Now the dwarf seahorse is at great risk of becoming extinct after the BP mess happened this past April, and it isn’t being helped any by the non-friendly methods for clearing up the mess, commented the director of the international project Seahorse conservation group, Amanda Vincent.

“We’re concerned that some lessons be learned for Canada from this fiasco,” Vincent commented during a press conference this past Tuesday.

“If we were to have an oil spill on this coast, either from tanker traffic or from drilling — if the moratorium were lifted — then we would also see them and everything else in their habitats severely affected.”

While a provincial, as well as federal, moratorium is in place against any kind of oil exploration on the north coast of British Columbia is in effect, the First Nations and other environmental organizations have cautioned of the dangers of putting in an oil pipeline.

And with what happened in the Gulf of Mexico who could blame them? We really need to step back, and force the big oil companies to take extra precautionary measures, before allowing to operate anywhere else in the world…

Many people are happy, and patting themselves on the back after finding the first baby sea horse at one of the leading breeding colonies in Dorset.

The tiny fry, what you call a tiny baby seahorse, discovered at Studland Bay is 4 centimeters in length.

Displayed sea horse is not from the dorset population.

The Seahorse Trust has claimed that the seahorses are an endangered animal, as many boats and mooring chains are taking big hunks and tearing up the seabed.

The Marine Management Organization, a government entity, has said that although research has been ongoing into the subject, there was no conclusive evidence that mooring chains are a threat to seahorses.

The Seahorse Trust is pushing for the protection of these amazing animals under the Wildlife and Countryside Act, which came into existence in 2008.

“The trust and its volunteer divers have seen adults, pregnant males and juveniles on the site before but never a baby (fry),” a representative of the Seahorse Trust has commented.
“It does not mean they are thriving, quite the reverse, they appear to be hanging on in there against the odds of hundreds of boats dropping anchors and mooring chains ripping up the seabed, destroying their fragile home.”

The main goal of the Seahorse Trust is to get those nasty moorings replaced with more environmentally sound ones which do not damage seagrass, and for boat users to switch to these new devices.

Hopefully the discovery of this new baby seahorse will prompt some more interest in the issue, and something will be done to help protect these magnificent sea creatures.

A 100 metre by 100 metre* anchor-free zone will be established in Studland Bay in Dorset bay to protect the largest seahorse breeding colony in the United Kingdom. To prevent boaters from accidently anchoring within the zone, it will be marked out by six large buoys fitted with flags on top.

“There might be the odd individual who out of spite or grievance will chose to go on there but it will be well marked so if anyone does it will be intentional”, says Natural England maritime advisor Richard Caldow.

The area will be patrolled by wardens and a map of boating activity will be constructed based on their observations during the busy summer season. Marine experts will then compare data from the anchor-free zone to a control zone where boats can anchor.

“I’m not interested in the names of boats”, Caldow says. “I want to know how many there are and where they are going, particularly the level of boating in the voluntary no anchor zone which will hopefully be none.”

* 109 x 109 yards

Have you ever tried to keep a seahorse alive in an aquarium only to fail miserably? Well, to add insult to injury, these creatures seem to be much sturdier than previously believed, because how else can you explain the amazing survival of a British seahorse found three miles inland in Weymouth, Dorset?

“I was just popping out to buy a paper and I looked down and saw this funny object by the pathway, said Karen Warr, 46, who discovered the unusual visitor outside her house. I got a bit closer I saw it was a seahorse. They are very distinctive. I did wonder what on earth it was doing there but I could see it was still breathing so I dashed inside and the only thing I could think of to pick it up with was a fish slice. I put it in the bowl I use for my scales and filled it with tepid water. It was still breathing but wasn’t moving much, it must have been in shock.”

How long the seahorse had been lying on the ground gasping for air is unknown, but Warr put her cat out three hours earlier; a cat fond of eating creatures from the sea. “’It couldn’t have been there then otherwise he would have eaten it”, Warr explained.

After saving the seahorse from suffocation, dehydration and the possible return of the hungry cat, Warr made a call to the nearest Sealife Centre. “I called the Sea Life Centre because they are only down the road and somebody came out to see me.”

The resilient seahorse, an adult female who has been given the name Pegasus, is now recuperating from her adventures in a dark quarantine aquarium at the Sea Life Centre where she is gradually being acclimatized back to saline conditions.

“They can go into shock if they are not treated carefully”, says Display supervisor Claire Little. “She seems fine now but we will continue to monitor her while she is in quarantine for the next 28 days. She has been quite lucky. They are fairly hardy creatures but it was obviously just very good fortune that she was found straight away and we were called.”

Exactly how a seahorse ended up three mile inland remains a mystery, but Warr and Little both agree that it was most likely dropped by a seagull.

An expansion of vertical seagrass occurring some 25 million years ago was probably what prompted seahorses to evolve from horizontal swimmers to upright creatures. If you live in vertical seagrass, an upright position is ideal since it allows you to stay hidden among the vertical blades.

This new idea is put forward in a report by Professor Beheregaray* and Dr Teske** published in the journal Biology Letters on May 6.

Sea horse picture from our Seahorse section.

Only two known fossils of seahorse have been found and this scarcity of fossil records has made it difficult for scientists to determine when seahorses evolved to swim upright. The older of the two fossils is “just” 13 million years old and no links between the two fossils and horizontally-swimming fish has been found.

“When you look back in time, you don’t see intermediate seahorse-like fish,” Beheregaray explains. There are however fish alive today that look like horizontally-swimming seahorses and Beheregaray and Teske have therefore studied them in hope of finding clues as to when seahorses made the transition from horizontal to vertical swimming.

By comparing DNA from seahorses with DNA from other species of the same family, Beheregaray and Teske were able to determine who the closest living relative to seahorses was.

“The pygmy pipehorses are by far the most seahorse-like fish on earth, says Beheregaray. “They do look like the seahorses, but they swim horizontally“.

When you have two closely related species, you can use molecular dating techniques to calculate when the two species diverged from each other. Beheregaray and Teske used a molecular dating technique that relies on the accumulation of differences in the DNA between the two species, and then used the two existing fossils to calibrate the rate of evolution of DNA in their molecular clock. By doing so, the two researchers could conclude that the last common ancestor of seahorses and pygmy pipehorses lived around 25 to 28 million years ago. At this point, something must have happened that led to the formation of two distinct species, and Beheregaray and Teske believe that this “thing” was the expansion of seagrass in the habitat where seahorses first evolved.

The time in history when seahorses arose, the Oligocene epoch, coincided with the formation of vast areas of shallow water in Austalasia. These shallow waters became overgrown with seagrass and turned into the perfect habitat for upright swimming seahorses that could remain hidden from predators among the vertical blades. The pygmy pipehorse on the other hand lived in large algae on reefs and had no use for an upright position, hence it continued to swim horizontally just like their common ancestor.

“The two groups split in a period when there were conditions favouring that split,” says Beheregaray. “It’s like us. We started walking upright when we moved to the savannahs. On the other hand, the seahorses invaded the new vast areas of seagrass.”

* Associate Professor Luciano Beheregaray of Flinders University

http://www.flinders.edu.au

** Dr Peter Teske of Macquarie University

http://www.macquarie.edu.au

A new disease has been discovered; a disease that effects both Leafy seadragons (Phycodurus eques) and Weedy seadragons (Phyllopteryx taeniolatus).

The disease, which as now been described by veterinary pathologists, is a type of melanised fungus that causes extensive lesions and necrosis of the gills, kidneys and other areas of the body in seadragons. The disease was discovered in seadragons kept in aquariums.

Experts from the Department of Pathobiology and Veterinary Science at the University of Connecticut has identified the presence of both Exophiala angulospora and an undescribed Exophiala fungus in sick seadragons.

You can find more information in the paper[1] by Nyaoke et al published in the Journal of Veterinary Diagnostic Investigation[2] in January this year.

The Leafy seadragon (Phycodurus eques) and the Weedy seadragon (Phyllopteryx taeniolatus) are both marine fish species belonging to the same family as seahorses and pipefish. The Leafy seadragon is covered in long leaf-like protrusions that serve as camouflage, while the Weedy seadragon is camouflaged by weed-like projections. Both species are native to Australian waters.

A six-month long investigation by the Florida Fish and Wildlife Commission (FWC) has led to the arrest of seven adults and one juvenile in Tampa. The arrested persons are believed to have been involved in various illegal activates concerning marine life, including catching protected sharks, sea horses, peppermint shrimp and bay scallops in Floridian waters, and exporting illegally obtained marine life to Europe. They are also suspected of having sold bait fish and bait shrimp as food for human consumption.

According to the FWC, the ring is believed to have operated for at least five years before attracting the attention of FWC. The ring lost a lot of animals due to poor maintenance, but the FWC still believes the group managed to sell $600,000 worth of peppermint shrimp alone.

The Florida Fish and Wildlife Conservation Commission came into existence on July 1, 1999. The Investigations Section of the commission conducts both overt (uniform) and covert (plainclothes) investigations, and one of their tasks is to target hard-core commercial violators by conducting long-term undercover investigations. In 2003, the Investigations Section made 554 arrests/warnings and seized 130 illegally possessed specimens of fish and wildlife including a cougar, tigers, leopards, primates, exotic deer, venomous reptiles, protected birds and exotic aquatic species.