NEWSLETTER 11/2013 18.11.2013

PARTNERS OF SHARK-REFERENCES:

• Dr. Jacques Herman, Belgian (Homepage)
   

         Partner in Google-Maps:                           

New images at shark-references:

• Craig Barnes
  
  for more images please visit the species description of Callorhinchus milii
   
• Philippe Borsa, IRD 
  
  for more images please visit the species description of Neotrygon trigonoides
  
   
• Peter Last (CMAR, Hobart) and William White (CMAR, Hobart) for images ofDasyatis longicauda LAST & WHITE, 2013 and Himantura javaensis LAST & WHITE, 2013 
  
   
• Franz Treml, Germany e.g. for images of Himantura uarnak  (FORSSKÅL, 1775), Taeniura lymma (FORSSKÅL, 1775) and Torpedo panthera OLFERS, 1831
  
   
• Adam P. Summers, SAFS Friday Harbor Laboratories, University of Washington for images of Sphyrna tiburo (LINNAEUS, 1758), embryo, stained with Alcian Blue and Alizarin Red S. and Gymnura crebripunctata (PETERS, 1869), stained with Alcian Blue and Alizarin Red S.
  
  
  
   
• Edmund Jarzembowski, UK
  
  Palaeoxyris jugleri (VON ETTINGSHAUSEN,1852); UpperWeald Clay, silty ironstone, Smokejacks Brickworks (015762). Maximum length 65 mm and width 19 mm (Scale line in mm); in: Jarzembowski, E. A., 1991. The Weald Clay of the Weald: report of 1988/89 field meetings. Proceedings of the Geologists' Association, 102 (2): 83-92
   

Missing papers:

Many thanks to all friends of shark-references, who send me some missing papers last month!

Shark-References would kindly like to ask you for your contribution to this project.

Please support www.shark-references.com and send missing papers (not listed papers or papers without the infosymbol) to juergen.pollerspoeck@shark-references.com.

 

Meetings:

News from shark-references:

New feature: Host-Parasites List (new designed) and Parasite-Hosts List

• Species Descriptions (e.g. extract of Aetobatus narinari)
   
• Host-Parasites List (e.g. extract of item "A")
   
• Parasite-Hosts List  (e.g. extract of item "A")

New described species/Taxonomic News:

Recent:

Fossil:

New Paper

Recent Papers:

Recent -Abstracts-:

Fossil:

MISCELLANEOUS:

source: http://www.cbc.ca/news/canada/north/arctic-mystery-fish-identified-1.2428592

comment (Jürgen Pollerspöck, shark-references): I think it is Rhinochimaera atlantica HOLT & BYRNE, 1909

Arctic mystery fish identified

A University of Windsor researcher has identified a strange fish caught recently in Nunavut waters. 

Nigel Hussey, a researcher who works with the Ocean Tracking Network, says the fish some speculated was a goblin shark is actually the mysterious "long-nosed chimaera" — mysterious because they're rarely caught.

This fish was caught recently by a Nunavut fishing boat, somewhere in Davis Strait. (Jutai Korgak, facebook)

"Only one of these fish has previously been documented from the Hudson Strait," Hussey says. "Potentially, if we fish deeper, maybe between 1,000 and 2,000 metres, we could find that's there's actually quite a lot of them there. We just don't know."

Hussey says the long-nosed chimera is related to sharks and stingrays. It's got a whip-like tail and a long nose. They typically grow to be about a metre long.

The fish was caught by a Nunavut fishing boat, somewhere in Davis Strait. A photo of the creature went viral, after it was posted online.

source: http://news.ca.msn.com/top-stories/prehistoric-sharks-escaped-mass-extinction-by-diving-deeper

Prehistoric sharks escaped mass extinction by diving deeper

The most severe extinction in the earth's history began 252 million years ago, wiping out 90 percent of ocean species and 70 percent of life on land. Modern sharks and their relatives were among the few that survived this "Great Dying," and new fossil finds hint as to how they may have clung on to life. 

A paleontological dig site in southern France, containing sediment from a much younger Cretaceous ocean floor, now have yielded fossilized teeth of a tiny shark relative, indicating that the fish found refuge by swimming to deeper oceans. 

The collection of millimeter-long teeth belong to three species of cladodontomorph sharks — not massive fish like we know them to be, but tiny, inch-long swimmers — relatives of modern sharks, skates and rays. They thrived in the Permian ocean prior to the extinction and researchers had thought they had perished in the Great Dying — until they were found in soil that was 135 million years fresh.

The tiny sharks, fleeing the acidic coastal waters of the end-Permian, moved to deeper oceans, and lived there for a hundred million years, Guillaume Guinot, a researcher at the Natural History Museum in Geneva, Switzerland, and his colleagues explain in the Tuesday issue of Nature Communications. 

"It changes our view of how dramatic this extinction event was," Guinot told NBC News. The find suggests that there may be many more fishes living in deep ocean sediment deposits that haven’t been found yet, and that may indicate that the "extinction wasn’t that dramatic for cartilaginous fishes." 

The new findings also allow for the possibility that modern sharks survived the die off in a similar way, by moving to deep open ocean that was perhaps less changed. "These are just ideas," he clarified, because there is no hard, ossified evidence that modern sharks also swam to deeper oceans and died (and fossilized) there. 

More about shark origins:

• Ancient ocean predators were reptiles that swam like sharks
• Stunning tail: Thresher sharks evolved to slap and kill their prey
• Sharks dominated prehistoric seas off France, UK

In addition to Guillaume Guinot, the authors of "Cretaceous stem chondrichthyans survived the end-Permian mass extinction" include Sylvain Adnet, Lionel Cavin and Henri Cappetta.

Nidhi Subbaraman writes about science and technology. You can follow her on Facebook, Twitter and Google+.

source: http://www.sciencedaily.com/releases/2013/11/131113182429.htm

The Big Fish That Got Away… (It Was Let Go)

 

The fishers were able to alert park officials and WCS scientists about the stranded whale shark using a text messaging system set up for the reporting of fishing violations. The big fish was safely released as a result. (Credit: Muhammad Jamaludin/Wildlife Conservation Society)