Cover photo
Verified name
Jill Studholme
Attended University of Manchester
Lived in Manchester
1,278 followers|25,661,704 views


Jill Studholme

Shared publicly  - 
White Sharks Don't Mistake Surfers for Seals
It’s commonly said that sharks, especially great white sharks, Carcharodon carcharias, mistake surfers for seals when looking at them from below and thus bite them by mistake.

Researchers from Florida and Vienna, though, have found that this is not the case.

They discovered that the majority of damage to surfers and their boards is at best moderate in nature and does not reflect the level of damage needed to immobilise or stun a seal. Not only that, but the sharks biting surf boards tend to be smaller than those that bite seals.

The working basis of the mistaken identity theory is the silhouette similarity between a seal and surfer when looked at from directly below. However, the average depth among the examined cases was was only around 4m, so the shark is not coming directly from below but at a shallow angle.


The original research is at
Erich Ritter and Alexandra Quester, “Do White Shark Bites on Surfers Reflect Their Attack Strategies on Pinnipeds?,” Journal of Marine Biology, vol. 2016, Article ID 9539010, 7 pages, 2016. doi:10.1155/2016/9539010
Silter Rodrigues's profile photoKevin Sutton's profile photoWade B.'s profile photo
Wade B.
Stalking butterflies with a Easter basket & magnifying glass knowing Madonna**
Add a comment...

Jill Studholme

Shared publicly  - 
Turns out squid from Japan or Cornwall is the most sustainable seafood choice
Squid – the Prawn Cocktail of the 21st Century – but is it OK to eat?
Where once the prawn cocktail was a staple of the restaurant starter menu, calamari has now become a diner’s favourite. Stewed, fried, in salad or dried with coconut milk, squid has spread its tentacles across the menu of many high street restaurant chains.

Its rise in popularity has led the Marine Conservation Society +Marine Conservation Society to increase the number of squid ratings in the latest version of its sustainable seafood advice – the Good Fish Guide.

Squid from Japan gets the green light but you should treat calamari from other fisheries with caution.

Find out more

View original post
TrueGaming96's profile photoR.T. Burke's profile photoSylvia Johnson's profile photo
You all can kiss my German behind. Evolution. How very dumb you are,both of you. I tell you what,you go ahead & learn onother language, read & write it. Only then you are qualified, to judge me. Depp!!
Add a comment...

Jill Studholme

Shared publicly  - 
Latest issue of SCUBA News (ISSN 1476-8011) now up
In this issue: interview with the author of Careers in Scuba Diving, the two sides of diving the Dominican Republic, the successful lionfish, where to dive in the Maldives and the roundup of the most interesting underwater news and research.
Add a comment...

Jill Studholme

Shared publicly  - 
The travelling nudibranchs
If they had sailing skills like these, Nemo and Dory wouldn’t keep losing each other...
Unlike most other nudibranchs, which are restricted to the sea floor, Fiona pinnata travels the oceans by hitching a ride on anything that passes
View original post
Add a comment...

Jill Studholme

Shared publicly  - 
Lionfish begin invasion into Mediterranean Sea: Cyprus already colonised
According to evidence from scuba divers and fishermen, lionfish have recently increased in abundance and within just one year have penetrated almost the entire south eastern coast of Cyprus.

The authors of a new report into the Mediterranean lionfish, published in Marine Biodiversity Records, are urging divers and fishermen to remove the lionfish when they see them.

Lionfish feed on a variety of fish and crustaceans, with large individuals preying almost exclusively on fish. They can live for 15 years.

Lionfish spawn every four days, year-round, producing around two million floating eggs a year. These travel with water currents for about a month before they settle.

When out of their own Red Sea environment, lionfish become a serious threat to the diversity of their foreign home. Research in the Bahamas showed that lionfish caused reductions of up to 80% in the recruitment of native fishes on experimental reefs.

More at

Original research at
A lionfish (Pterois miles) invasion has begun in the Mediterranean Sea, Demetris KletouEmail author, Jason M. Hall-Spencer and Periklis Kleitou. Marine Biodiversity Records 2016 9:46
Donna Farnsworth's profile photoJill Studholme's profile photojackie gonzalez's profile photo
Im actually happy to hear that they have increased over one year, wow that great bc they usually take a long time to cone back heavy.
Add a comment...

Jill Studholme

Shared publicly  - 
Love Rick Wakeman's playing.

Happy New Year!
Rick joined Simon Mayo on Drivetime to perform a very special version of Life on Mars.
Jill Studholme's profile photoKevin Clift's profile photo
I think they mentioned this TV program.  I can't see it but it may be of interest to you.
Bowie at the BBC:
Add a comment...

Jill Studholme

Shared publicly  - 
Tides and currents do a great job of sweeping pollen from marine plant to plant, so scientists thought underwater pollinators were unnecessary. But now, researchers from the National Autonomous University of Mexico have discovered a species of Caribbean seagrass, Thalassia testudinum, that can be pollinated by zooplankton and bottom-dwelling invertebrates.

via +José Geraldo da Silva
Add a comment...

Jill Studholme

Shared publicly  - 
The Extraordinary Bull Shark
One of the extraordinary things about bull sharks is that they are as happy in freshwater as they are in the sea. They have even been seen far inland up the Mississippi river. Many spend time in the freshwater Lake Nicaragua – jumping up the river like salmon to get there.

Bull sharks – latin name Carcharhinus leucas – are medium-sized sharks with thick-set bodies. They are requiem sharks, related to tiger sharks and oceanic whitetips. Like these they are aggressive hunters. They eat all sorts of animals, including turtles, birds, dolphins, terrestrial mammals, crustaceans, fishes and other sharks.

The young bull sharks live in inshore estuaries whereas adults are highly dependent on coral reef communities for their food.

Bull sharks cruise the seas alone until it’s time to mate. The mothers are viviparous – they give birth to living babies rather than to eggs. Their litters contain between one and fourteen pups. A single litter of pups can come from more than one fathers. Scientists think that the female sharks mate several times with different males to increase either the number, or the quality, of their babies.

The IUCN assess the bulls shark as “near threatened”. This means likely to become endangered in the near future if trends continue. The location of nursery areas in estuarine and freshwater systems makes the species vulnerable to pollution and habitat modification. Other threats include recreational fishing and by-catch in commercial fisheries.
Photo credit: Daniel Kwok (CC BY-NC-ND 2.0)
Aditi Nimmi's profile photoMoom Chatterjee's profile photoEmanuel Francis's profile photoDenilson Queco's profile photo
Eu gosto muito desse animais sao lindx 
 ·  Translate
Add a comment...

Jill Studholme

Underwater Photos and Videos  - 
Anyone entering the Ocean Art 2016 Underwater Photography Contest?
Add a comment...

Jill Studholme

Shared publicly  - 
Interesting article by Ken Thompson in the Telegraph touching the evolution of seaweeds. Brown seaweeds "kidnapped" a red alga and its chloroplasts, then used them to build a big photosynthetic organism.

Animals and plants are eukaryotes (organisms whose cells contain nuclei, unlike bacteria, which don’t). Eukaryotes themselves never evolved the ability to photosynthesise – they simply “borrowed” the ability by engulfing a photosynthetic bacterium, which eventually became a chloroplast. This crucial event happened only once in the entire history of life, somewhere around a billion years ago. The direct line of descent from this event branched a very long time ago. One branch became the green plants, while the other became the red seaweeds, so there’s a very good argument for calling red seaweeds plants; not only are they large and photosynthetic, they’re even related (distantly) to green plants.

In another part of the evolutionary forest altogether, unrelated to green plants, animals and fungi, in fact unrelated to anything you’ve ever heard of, another group of organisms acquired chloroplasts “second hand” by kidnapping a red alga, and then used them to build a big photosynthetic organism. These are the brown seaweeds
In an episode of the Radio 4 science/comedy chat show The Infinite Monkey Cage, Brian Cox asked plant biologist Professor Jane Langdale “
Barb Propst's profile photoVitus Mtanda's profile photolaureano rua orozco's profile photoJill Studholme's profile photo
+laureano rua orozco Thanks very much!
Add a comment...

Jill Studholme

General Discussion  - 
Scientists urge divers to remove lionfish in the Mediterranean Sea

Lionfish have begun invading the Med - they have already colonised the south coast of Cyprus.

Lionfish spawn every four days, year-round, producing around two million floating eggs a year. These travel with water currents for about a month before they settle. They can spread very quickly and prompt action by divers and fishermen is all that will prevent them from spreading further.

The fish have very few predators, although large grouper will sometimes eat them.

When out of their own Red Sea environment, lionfish become a serious threat to the diversity of their foreign home. Research in the Bahamas showed that lionfish caused reductions of up to 80% in the recruitment of native fishes on experimental reefs.

Photo credit: Tim Nicholson
More at
Per-Erik Einerth's profile photoJill Studholme's profile photo
+Per-Erik Einerth They are beautiful in their own Red Sea environment.They cause lots of damage where they are not native though because they eat so many fish, have practically no predators in their new areas and are very successful at reproducing. They have reduced the population of of small native reef fishes by up to 95% at some invaded sites.
Add a comment...
Jill's Collections
Writing on the marine environment and scuba diving
Some days writing on scuba diving and the marine environment, others on data acquisition & control.

Edits SCUBA News (ISSN 1476-8011) which launched in May 2000. SCUBA News contains articles on diving destinations; features a marine "creature of the month" and brings news on events and research in the diving, marine life and other underwater fields. Tweets as @SCUBANews and contributes to the SCUBA Travel Facebook page. Also editor of the SCUBA Travel web site.

Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Manchester - Ashbourne
Collections Jill is following
View all
  • University of Manchester
Basic Information
Jill Studholme's +1's are the things they like, agree with, or want to recommend.
Jean-Marc Luna (juancaramel)

The CircleRank of Jean-Marc Luna (juancaramel) is 8679! In France the CircleRank is even 34! Jean-Marc Luna (juancaramel) says 'Geek de camp


Easily see the best time for you to post on Google+ for the greatest impact.

Retail Sensing

Leading the way in video capture people counting around the world

Why Count People? What are the benefits for Bars, Shops...? | Video Turn...

People Counting Systems » Who Counts People? Who Counts People and Why? Video Turnstile People Counter. Many companies benefit from counting

Beautiful Close-Up Underwater Photos of Luminous Sea Creatures - PetaPixel

Photographer Joshua Lambus has put together a beautiful series of photographs showing luminous creatures of the deep glowing with light agai

Amazing Sea Butterflies Are the Ocean’s Canary in the Coal Mine

These delicate and stunning creatures are offering Smithsonian scientists a warning sign for the world's waters turning more acidic

Making Google Plus Work for You | A Culinary Journey With Chef Dennis

If you want to know why Google Plus doesn't seem to work for you, I'll give you 12 good reasons.

GISCafe -

April 19, 2013 -- Windmill Software is pleased to announce new software for easy data logging and control with Excel. Called Windmill Real T

Google+ Platform — Google Developers

Access public Google+ social graph info, build Hangout apps, and more.

Manatees - Photo GalleryPhotogallery - National Geographic Magazine

We swim with it when legal, tune to its radio station, ponder its fate.

SCUBA Travel

Everything Scuba Diving from the SCUBA Travel dive guide

9 marketing strategies you must stop using -- now -

Antonio, thank you for clarifying. I was referring to Blue Martini & Broadvision platforms in my article, as examples of overly complicated

Wireless Devices Track Movements of Ocean-Going Creatures

For most people, the sea is a deep, dark mystery. That is changing, though, as scientists find innovative ways to track the movements of oce

Kidnapped Brits Freed, according to Egyptian TV - SCUBA News

According to reports on Egyptian State TV, police have just announced that the two Britons who were kidnapped in Egypt have been freed.

Bedouin Kidnap 2 Tourists on route to Sharm El-Sheikh - SCUBA News

Tribesmen have kidnapped two British tourists on route from Cairo to Egypt's diving resort of Sharm el-Sheikh. The kidnappers are reported t

Island Safari 1

The crew was great and I would definitely dive with them again.

Harlequin Shrimp eats Starfish Alive

Exquisitely patterned Harlequin Shrimp eats starfish alive: starfish takes days to die.

SCUBA News (ISSN 1476-8011): Issue 153, February 2013 | SCUBA Travel

In this issue: Comparing diving qualifications: PADI, BSAC, NAUI, etc; diving East Timor, Sardinia and Jordan; article by Samantha Craven, c