Showing posts with label hermit crab. Show all posts
Showing posts with label hermit crab. Show all posts

Wednesday, 27 September 2017

New hermit crab uses live coral as its home


Crab substitutes for marine worm in symbiotic partnership with walking coral

Date:  September 21, 2017
Source:  PLOS

A new hermit crab species can live in a walking coral's cavity in a reciprocal relationship, replacing the usual marine worm partner, according to a study published September 20, 2017 in the open-access journal PLOS ONE by Momoko Igawa and Makoto Kato from Kyoto University, Japan.

Wednesday, 10 April 2013

Hermit Crab Species Found Alive for First Time

Douglas Main, OurAmazingPlanet Staff Writer 

Date: 08 April 2013 Time: 04:49 PM ET 

A recent submarine dive turned up a species of hermit crab that was previously only known through dead, dried specimens procured more than a century ago. 

The sub collected a few of the animals, known as Pylopagurus discoidalis, from the Caribbean and brought them back to an aquarium, where they were photographed. These are the first pictures of the live animals ever taken, said Rafael Lemaitre, a research zoologist at the Smithsonian Institute's National Museum of Natural History. 
hermit crab 'riding' a sea cucumber

Like other hermit crabs, these make their living in shells produced by other animals, mainly mollusks, Lemaitre told OurAmazingPlanet in an email. They must choose carefully, however, to find a shell that fits their tube-shaped body. The most striking feature of the animal is its chelae, a shield-shaped appendage that allows it to firmly seal its shell when alarmed, Lemaitre said. The other end of the shell can also be sealed by the hermit crab with the tail-like end of its body. 

The animals were collected at a depth of 50 to 100 meters (164 to 328 feet) by a craft called the Curasub, just off the coast of the Caribbean island of CuraƧao. It was found as part of the Smithsonian's Deep Reef Observation Project, which provides "an extraordinary and unique opportunity for taxonomists like me to make direct, live observations of many species that have previously been known exclusively from preserved and colorless specimens in museum collections," Lemaitre said. 

Not much has been revealed regarding how these little hermit crabs live their daily lives. "We know very little about the biology of this species except that it exists, and its general geographic and depth distribution," Lemaitre said. "Unfortunately, that is the case for the majority of invertebrate species." 

After some of the collected crabs died, their DNA was taken and is currently being analyzed to understand its evolutionary history, Lemaitre added. 

Wednesday, 5 December 2012

Tiny new hermit crab species discovered in Belize


American university biologist discovers new crab Species

November 2012. A tiny new species of hermit crab, Areopaguristes tudgei, has been discovered on the barrier reef off the coast of Belize by Christopher Tudge, a biology professor at American University in Washington, D.C.

Tudge, despite many years of research, has, until now, never had a species named after him. He only found out about his namesake after reading an article about it in the journal Zootaxa. Apparently, finding out after-the-fact is standard practice in the highly formalized ritual of naming a new species.

The two crustacean taxonomists and authors of the paper who named the new crab after Tudge, Rafael Lemaitre of the Department of Invertebrate Zoology at the Smithsonian Institution's National Museum of Natural History and Darryl L. Felder of the University of Louisiana-Lafayette's Department of Biology Laboratory for Crustacean Research, have known Tudge since he first came to Washington in 1995 as a postdoc research fellow at the Smithsonian.

Years of research
Lemaitre and Felder have been collecting specimens on the tiny Belizean island for decades and for more than 10 years, they had asked Tudge-who specializes in the structures of crustacean reproduction and how they relate to the creatures' evolutionary history-to join them on one of their semiannual research outings. Finally, in February 2010, Tudge joined them on a tiny island covered with hundreds of species of their favourite fauna.

Related Posts with Thumbnails

ShareThis