Navigation Links
Hormone in crab eyes makes it possible for females to mate and care for their young
Date:2/3/2014

BALTIMORE, MD (February 3, 2014) Those two crooked beady eyes peeking out of a the shell do more than just help blue crabs spot food in the murky waters of the Chesapeake Bay. They also produce important hormones responsible for the growth and development of a crab from an adolescent into a full-fledged adult. Scientists at the Institute of Marine and Environmental Technology in Maryland recently discovered a new hormone in those eyestalks responsible for forming body parts that make it possible for female crabs to mate and raise young.

"This is the first definitive evidence for the presence of a female-specific hormone in crabs that regulates the development of structures essential for mating and caring for their eggs," said author J. Sook Chung, an associate professor with the University of Maryland Center for Environmental Science. "This hormone is required for maternal care."

Scientists found that this crustacean female sex hormone (CSFH), present in the eyestalk of female blue crabs, or Calinectes sapidus, is integral to the maturation of the crab and development of reproductive structures needed for brooding and mating.

"For the first time in crustaceans, a substance that is critically involved in the control of expression of relevant adult anatomic features in females has been identified," said Russell Hill, Director of the Institute of Marine and Environmental Technology. "This is very significant basic research on a molecular level that also may have practical application in the future, as with most of the important research at IMET".

Female crabs mate only once in their lives, at the very moment that they molt for the final time and reach maturity. The female sex hormones trigger the development of a pair of special receptacles, called spemathecae, that store microscopic packets of sperm, or spermatophores, from the male crab. After mating, the sperm lives in these sacs for up to two years and will be used by the female crab several times to produce more fertilized eggs.

The hormone also triggers the development of hair-like external structures that hold fertilized eggs outside the female's body. The female crab extrudes more than two million eggs into a sponge-like mass that remains attached to her abdomen until the larvae emerge.


'/>"/>
Contact: Amy Pelsinsky
apelsinsky@umces.edu
410-330-1389
University of Maryland Center for Environmental Science
Source:Eurekalert  

Related biology news :

1. Biomarker for stress hormones in polar bears, wildlife affected by global climate change
2. Maternal stress hormones and maternal smoking increase daughters risk of nicotine dependence
3. A*STAR scientists discover novel hormone essential for heart development
4. Hormone therapy could enhance the therapeutic effect of head and facial bone grafts
5. Hormones impact stress, memories, and understanding social cues
6. Gut hormone test predicts individual efficacy of gastric bypass
7. Study reveals potential role of love hormone oxytocin in brain function
8. Arg-Phe-amide-related peptides influence gonadotropin-releasing hormone neurons
9. Prohormonesdirect.com Offers in Depth OxyELITE Pro Reviews
10. Prohormonesdirect.com Discusses the Man of Steel Workout Plan
11. Calcium and vitamin D help hormones help bones
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Hormone in crab eyes makes it possible for females to mate and care for their young
(Date:5/16/2017)... 2017  Veratad Technologies, LLC ( www.veratad.com ), an ... identity verification solutions, announced today they will participate as ... 15 thru May 17, 2017, in Washington ... Center. Identity impacts the lives of ... quickly evolving digital world, defining identity is critical to ...
(Date:5/6/2017)... , May 5, 2017 RAM ... announced a new breakthrough in biometric authentication based ... quantum mechanical properties to perform biometric authentication. These new ... semiconductor material created by Ram Group and its ... entertainment, transportation, supply chains and security. Ram Group ...
(Date:4/19/2017)... ALBANY, New York , April 19, 2017 /PRNewswire/ ... highly competitive, as its vendor landscape is marked by ... in the market is however held by five major ... and Safran. Together these companies accounted for nearly 61% ... majority of the leading companies in the global military ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... publication of a United States multicenter, prospective clinical study that demonstrates the ... diagnostic test capable of identifying clinically significant acute bacterial and viral respiratory ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... in its endogenous context, enabling overexpression experiments and avoiding the use of exogenous ... RNA guides is transformative for performing systematic gain-of-function studies. , This complement ...
(Date:10/11/2017)... LAGUNA HILLS, Calif. , Oct. 11, 2017 ... London (ICR) and University of ... prognostic tool to risk-stratify patients with multiple myeloma (MM), in ... nine . The University of Leeds ... by Myeloma UK, and ICR will perform the testing services ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights ... (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital ...
Breaking Biology Technology: