Science Current Events | Science News | Brightsurf.com
 

Hormone in crab eyes makes it possible for females to mate and care for their young

February 04, 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.

University of Maryland Center for Environmental Science


Related Hormone Current Events and Hormone News Articles


Researchers investigate possible colon cancer risk for new generation of weight-loss drugs
Gastric bypass and similar stomach-shrinking surgeries are a popular option for obese patients looking to lose weight or treat type 2 diabetes.

Agreement on best estimates of breast cancer overdiagnosis urgently needed to inform women
In 2012, prompted by increasing debate about overdiagnosis, an independent UK panel estimated that about 19% of breast cancers diagnosed among women invited to mammogram screening were in fact overdiagnosed (they would have been harmless). But other estimates have been higher (up to 50%) or lower (less than 5%).

Endocrine Society publishes comprehensive report on hormone health statistics
The Endocrine Society today published the first chapter of a new report compiling the latest peer-reviewed statistics on hormone health conditions into a single resource.

Why nitrate supplementation may increase athletic performance
Walk down the aisles of any food supplement store and you'll see that the use of nitrate supplements by athletes and fitness buffs has been popular for years.

When I'm 64 -- I'll still have hot flashes?
Some 40% of women 60 to 65 years old still have hot flashes. For many, the hot flashes are occasional and mild, but for some, they remain really troublesome, shows a new study just published in Menopause, the journal of The North American Menopause Society (NAMS).

Aggressive boys tend to develop into physically stronger teens
Boys who show aggressive tendencies develop greater physical strength as teenagers than boys who are not aggressive, according to new research published in Psychological Science, a journal of the Association for Psychological Science.

Interaction of estrogen receptor and coactivators seen for first time
For more than 50 years, Dr. Bert O'Malley, chair of Baylor College of Medicine's department of molecular and cellular biology, has worked to understand the estrogen receptor, how it works and how it partners with other molecules in the cell.

Malaria transmission linked to mosquitoes' sexual biology
Sexual biology may be the key to uncovering why Anopheles mosquitoes are unique in their ability to transmit malaria to humans, according to researchers at Harvard T. H. Chan School of Public Health and University of Perugia, Italy.

GLP-1 secretion is reduced in overweight, pre-diabetes and type 2 diabetes
GLP-1 is a hormone that regulates glucose levels in the body by stimulating the secretion of insulin, and GLP-1 also inhibits appetite.

Omega-3 fatty acids and vitamin D may control brain serotonin
Although essential marine omega-3 fatty acids and vitamin D have been shown to improve cognitive function and behavior in the context of certain brain disorders, the underlying mechanism has been unclear.
More Hormone Current Events and Hormone News Articles

The Hormone Reset Diet: Heal Your Metabolism to Lose Up to 15 Pounds in 21 Days

The Hormone Reset Diet: Heal Your Metabolism to Lose Up to 15 Pounds in 21 Days
by Sara, M.D. Gottfried (Author)


The Harvard-educated physician and New York Times bestselling author of The Hormone Cure shows you how to grow new receptors for your seven metabolic hormones, making you lose weight and feel great fast!When it comes to weight loss, most people don’t think about hormones. But when you develop resistance to your seven major metabolic hormones—cortisol, thyroid, testosterone, growth hormone, leptin, insulin, and estrogen—your body adjusts by increasingly raising your hormone levels and ultimately slowing down your metabolism. And a slower metabolism leads to weight gain and difficulty losing weight. The solution, Dr. Sara Gottfried contends, is to reset the efficiency of your hormones by repairing and growing new hormone receptors.Based on leading scientific research, The Hormone...

The Miraculous Results Of  Extremely High Doses Of  The Sunshine Hormone Vitamin D3  My Experiment With Huge Doses Of D3 From 25,000 To 50,000 To 100,000 Iu A Day Over A 1 Year Period

The Miraculous Results Of Extremely High Doses Of The Sunshine Hormone Vitamin D3 My Experiment With Huge Doses Of D3 From 25,000 To 50,000 To 100,000 Iu A Day Over A 1 Year Period
by Jeff T Bowles (Author)


This updated edition has a fascinating new look at diabetes as an evolved defense to freezing damage in winter gone out of control- Don't miss it!

144+ Pages of
Fact-Packed Science Based Information-But FUN to read-

Upon realizing that taking 4,000 IU of Vitamin D3 a day was not enough for me, I decided to embark on a "dangerous" experiment that directly contradicted everything MD's had told me for years:

“DON'T TAKE TOO MUCH VITAMIN D IT IS DANGEROUS!”

I started taking 20,000 IU a day-50X times the recommended dose of 400 IU a day.

After about 4 months upped the dose to 50,000 IU a day or 150X the old recommended “safe” dose I then boosted it to 100,000 IU a day or 300 x TIMES the old maximum safe dose!

What happened over these...

The Supercharged Hormone Diet: A 30-Day Accelerated Plan to Lose Weight, Restore Metabolism & Feel Younger Longer

The Supercharged Hormone Diet: A 30-Day Accelerated Plan to Lose Weight, Restore Metabolism & Feel Younger Longer
by Natasha Turner (Author)


In this busy world, we want to lose weight sooner and faster. The Hormone Diet taught readers the ins and outs of how and why their hormones play the biggest part in their weight-loss woes. Now, in The Supercharged Hormone Diet, Dr. Natasha Turner gives readers the information they need to get their hormones back on track—in 30 days flat.This highly praised plan addresses readers’ most popular concerns in a fabulous, easy-to-follow program that includes:The Best Body Assessment for setting your goalsThe Hormonal Health Profile to identify fat-packing hormonal imbalancesRecommended blood tests to take to your doctorSuggested supplements to aid fat burning and restore optimal healthHormone Diet–friendly food lists, weekly meal plans, and a handy grocery...

Dr. John Lee's Hormone Balance Made Simple: The Essential How-to Guide to Symptoms, Dosage, Timing, and More

Dr. John Lee's Hormone Balance Made Simple: The Essential How-to Guide to Symptoms, Dosage, Timing, and More
by John R. Lee (Author), Virginia Hopkins (Author)


The authors of the classice books on menopause andpremenopause bring women an easy-to-use guide on balancing hormonelevels safely and naturally

Hormones: Chemical Messengers

Hormones: Chemical Messengers
by Choice PH


Hormones are the silent messengers that do their work unseen. They are vitally important in all phases of our life. In fact, there is no part of our existence that is not touched, in some way by hormones.

The remarkable part is they exercise their profound control and change with minute quantities that reach their target tissues via the bloodstream.

In this eBook, we highlight hormones of the endocrine system from the master gland, the Pituitary--and other hormones that regulate a variety of physiological and behavioral activities such as: digestion, metabolism, growth, sleep, reproduction, lactation, and stress; to name a few.

The Hormone Diet: A 3-Step Program to Help You Lose Weight, Gain Strength, and Live Younger Longer

The Hormone Diet: A 3-Step Program to Help You Lose Weight, Gain Strength, and Live Younger Longer
by Natasha Turner (Author)


Many of us experience signs and symptoms of hormonal imbalance every day. Do you have trouble dragging yourself out of bed in the morning? Ever have an uncontrollable sugar craving at 3 p.m.? Chronic headaches? Lack of energy? Do you get stressed just sitting in your office? Our bodies are wired to send us signals when something isn't right, but often we're too busy to hear them. Compounding the problem is a lack of understanding about the consequences if these symptoms are left unaddressed. Without hormonal balances, we are more likely to succumb to many diseases and illnesses.The Hormone Diet lays out a foolproof plan to balance your life, one hormone at a time. But it is more than just a diet book. Along with advice for weight loss, Dr. Natasha Turner provided recommendations for...

The Hormone Solution: Stay Younger Longer with Natural Hormone and Nutrition Therapies

The Hormone Solution: Stay Younger Longer with Natural Hormone and Nutrition Therapies
by Dr. Thierry Hertoghe (Author)


America’s perceptions about the inevitable effects of aging are about to be completely rethought, thanks to groundbreaking new information from an internationally known expert on hormones and antiaging medicine. Thierry Hertoghe, M.D., has an important message to share: people are aging unnecessarily.

Based on thirty-five years of scientific studies, The Hormone Solution: Stay Younger Longer with Natural Hormone and Nutrition Therapies is the first book that offers a prescriptive program to counter memory loss, weight gain, wrinkles, shrinking muscle mass, impotence, hair loss, and a host of other signs and symptoms of aging. Dr. Hertoghe offers an effective program of hormone replacement therapy using safe, low doses of natural hormones—in conjunction with a healthy diet and...

Natural Hormone Balance for Women: Look Younger, Feel Stronger, and Live Life with Exuberance

Natural Hormone Balance for Women: Look Younger, Feel Stronger, and Live Life with Exuberance
by Uzzi Reiss (Author), Martin Zucker (Author)


A pioneering gynecologist and antiaging specialist with a successful Beverly Hills practice, Dr. Uzzi Reiss shows the way for women who want to turn back the effects of time through natural hormone therapy, but who wonder: is it safe? Does it work? Is hormone therapy right for me?

Natural Hormone Balance for Women is Dr. Reiss's breakthrough, step-by-step program for women who want to take control of their lives by restoring hormonal balance. This revolutionary, commonsense natural hormone replacement program is designed to meet the individual needs of most women looking to rejuvenate body and mind -- and offers astounding benefits for women of all ages:

More energy and stamina * Improved memory * Healthier, more youthful skin * Balanced moods * Less depression and anxiety...

The Female Body Blueprint: A Guide to Understanding Hormones and Thyroid Health

The Female Body Blueprint: A Guide to Understanding Hormones and Thyroid Health
by Archangel Ink


Hormones Gone Haywire?
There is a crisis in women’s health today. The average age for puberty has dropped abruptly to 10 years of age. Endometriosis, one of the top three causes of female infertility, affects more than 5.5 million women. 75% of all women suffer with some premenstrual syndrome symptoms. 80% of all women have uterine fibroids (which lead to 170,000-300,000 hysterectomies annually). And dysmenorrhea—menstrual pain that interferes with day-to-day activities—affects approximately 40-70% of women of reproductive age. If you’ve visited your doctor for any of these reasons, it’s likely you’ve been given birth control pills to “even things out” or hormone replacement therapy. But is this really a solution?

The Solution Isn’t More Birth...

© 2015 BrightSurf.com