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


Racial disparity in cancer mortality is narrowing, suggests new study
Cancer mortality remains significantly elevated among African Americans. Between 2000 and 2010, overall mortality from cancer decreased faster among African American women and men than among Caucasians.

Keep moving, studies advise cancer survivors
Three or more hours of walking per week can boost the vitality and health of prostate cancer survivors. Men and women who have survived colorectal cancer and are regular walkers as well report lower sensations of burning, numbness, tingling or loss of reflexes that many often experience post-treatment.

Systems-wide genetic study of blood pressure regulation in the Framingham Heart Study
A genetic investigation of individuals in the Framingham Heart Study may prove useful to identify novel targets for the prevention or treatment of high blood pressure. The study, which takes a close look at networks of blood pressure-related genes, is published in the journal Molecular Systems Biology.

After prostate cancer, start walking
Walking at an easy pace for about three hours every week may be just enough physical activity to help prostate cancer survivors reduce damaging side effects of their treatment, according to a new Northwestern Medicine study.

More analysis from the women's health initiative on hormones, breast cancer
Analysis of the longer-term influence of menopausal hormone therapy on breast cancer incidence in two Women's Health Initiative (WHI) clinical trials suggests a pattern of changing influences over time on breast cancer, according to an article published online by JAMA Oncology.

How oxytocin makes a mom: Hormone teaches maternal brain to respond to offspring's needs
Neuroscientists at NYU Langone Medical Center have discovered how the powerful brain hormone oxytocin acts on individual brain cells to prompt specific social behaviors - findings that could lead to a better understanding of how oxytocin and other hormones could be used to treat behavioral problems resulting from disease or trauma to the brain.

BPA exposure affects fertility in next 3 generations of mice
When scientists exposed pregnant mice to levels of bisphenol A equivalent to those considered safe in humans, three generations of female mouse offspring experienced significant reproductive problems, including declines in fertility, sexual maturity and pregnancy success, the scientists report in the journal Toxicology and Applied Pharmacology.

Why we have chins
Look at a primate or a Neanderthal skull and compare it with a modern human's. Notice anything missing?

Hormones that guide root growth rates revealed
A plant's roots grow and spread into the soil, taking up necessary water and minerals.

Serious life events in childhood can triple risk of developing type 1 diabetes
New research from Sweden published in Diabetologia (the journal of the European Association for the Study of Diabetes) shows that serious life events (SLEs) in childhood, such as death or illness in the family, divorce/separation, a new child or adult in the family, and conflicts in the family, can triple the risk of subsequently developing type 1 diabetes (T1D).
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 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 Hormone Secret: Discover Effortless Weight Loss and Renewed Energy in Just 30 Days

The Hormone Secret: Discover Effortless Weight Loss and Renewed Energy in Just 30 Days
by Dr. Tami Meraglia (Author), Daniel Amen (Foreword)


From an expert in integrative medicine, a thirty-day plan to help women lose weight and look and feel years younger.

As they grow older, many women struggle to lose weight. Unlike many men their age, they may also suffer from sleep problems, osteoporosis, and depression. Many women may even feel like they age less slowly and gracefully than their male counterparts.

Dr. Tami Meraglia knows that the magic word here is testosterone. While there is ample discussion in the medical community about the effects of estrogen loss, few people are aware of the importance of sufficient testosterone levels in women. A healthy dosage helps women slim down, improves their mood, lowers the risk of cardiac disease, increases energy and libido, prevents osteoporosis, enhances skin tone and...

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 goals

- The Hormonal Health Profile to identify fat-packing hormonal imbalances

- Recommended blood tests to take to your doctor

- Suggested supplements to aid fat burning and restore optimal health

- Hormone Diet-friendly food lists, weekly meal plans, and a...

Hormone Reset Diet: 30+ Breakfast to Dessert Recipes to Boost Metabolism, Balance Hormones, and Lose Weight Fast (Hormone Reset Diet, Hormonal Imbalance, ... Cure, Hormone Cookbook, Hormone Recipes)

Hormone Reset Diet: 30+ Breakfast to Dessert Recipes to Boost Metabolism, Balance Hormones, and Lose Weight Fast (Hormone Reset Diet, Hormonal Imbalance, ... Cure, Hormone Cookbook, Hormone Recipes)


Your Ultimate Hormone Diet Cookbook to Losing Weight Fast!!!
Today only, get this Amazon bestseller for just $3.99. Regularly priced at $6.99. Read on your PC, Mac, smart phone, tablet or Kindle device.

This book is made to support those who are practicing the diet and are having a confusion or problem with their meal plans. You want recipes and less chit-chat? This book has exactly what you need!

This ultimate cookbook is packed with recipes that will take care of your breakfast, lunch, dinner, snacks, and dessert. The recipes aren’t also just another health-promising recipes. They are also made to please your taste buds. Imagine meat, seafood, omelette, pudding, gelatin, smoothies, and sweets all at your fingertips in just one book! I made it so that...

Hormone Reset Diet: 30+ Super-Healthy Smoothie Recipes to Boost Metabolism, Balance Hormones, and Start Losing Weight in 7 Days (Hormone Reset Diet, Hormone ... Hormones Weight, Hormones and Weight Loss)

Hormone Reset Diet: 30+ Super-Healthy Smoothie Recipes to Boost Metabolism, Balance Hormones, and Start Losing Weight in 7 Days (Hormone Reset Diet, Hormone ... Hormones Weight, Hormones and Weight Loss)


30+ Easy and Delicious Smoothie Recipes to Boost Metabolism and Start Losing Weight In 7 Days

Today only, get this Amazon bestseller for just $3.99. Regularly priced at $6.99. Read on your PC, Mac, smart phone, tablet or Kindle device.

Hormone balance is a big thing nowadays. While some may not, exactly, realize the importance of balancing your hormones, some are going out of their own way to find out how to manage their hormones. Why, you may ask? Hormones are the ones who control your hunger, your fullness, your stress levels, your sex drive, pretty much everything!

So you want to lose weight? This book would be the one to help you boost metabolism, balance hormones, and kick-start your weight loss!


This book contains various...

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

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...

Hormone Reset: 30 Hormone Diet Hacks To Fix Your Metabolism & Lose Up To 5 Pounds A Week

Hormone Reset: 30 Hormone Diet Hacks To Fix Your Metabolism & Lose Up To 5 Pounds A Week


Are you doing everything right?
Have you cleaned up your diet?
Are you excising properly?

.....and you still can't lose those last few pounds?

IT'S VERY LIKELY THAT YOUR HORMONES ARE OUT OF SYNC!


This book introduces you to 30 HORMONE DIET HACKS to RESET your hormones and get your metabolism fired up again.......so.......you can LOSE WEIGHT and get the body you've always dreamed of.

We cover areas such as:

-Insulin
-Leptin
-Thyroid
-Estrogen

and MUCH MUCH MORE!

Each "HACK" includes:

1. The issue caused by poor hormonal harmony!
2. The solution for the issue!
3. Simple and easy to follow ACTION STEPS!


SECURE YOUR COPY...

Hormone Harmony: How to Balance Insulin, Cortisol, Thyroid, Estrogen, Progesterone and Testosterone To Live Your Best Life

Hormone Harmony: How to Balance Insulin, Cortisol, Thyroid, Estrogen, Progesterone and Testosterone To Live Your Best Life
by Alicia Stanton (Author), Vera Tweed (Author)


Hormone Harmony addresses millions of women who are struggling with hormone imbalance, an epidemic that is disrupting countless lives during menopause and much earlier in life a widely unrecognized fact. It demystifies the subject of natural or bioidentical hormone therapy and debunks the myth that menopause is the primary trigger of midlife symptoms such as constant fatigue, lack of zest, sleep difficulties, mood swings, weight gain, loss of sex drive, forgetfulness, fuzzy thinking, and even hot flashes. In a friendly style, the book reveals the chief lifestyle triggers of hormonal havoc that are ignored in health care today; why six key hormones insulin, cortisol, thyroid, estrogen, progesterone and testosterone must be in balance; how to restore harmony by making practical lifestyle...

© 2015 BrightSurf.com