Navigation Links
Zoologists: Sea snakes seek out freshwater to slake thirst
Date:11/6/2008

n oceans. Most spend all, or nearly all, of their lives in seawater, including giving birth to live young while swimming. A minority, including the kraits that Lillywhite studied, lay eggs and spend at least a small part of their lives on land.

In the lab studies, Lilywhite's team kept snakes caught in the wild near Orchid Island, Taiwan, away from freshwater for two weeks. At the end of that period, dimpling of the snakes' scales indicated they were dehydrated.

The researchers weighed the snakes, freed them in saltwater tanks for up to 20 hours, then weighed them again. None gained appreciably, indicating they didn't drink, despite their thirst. But when the researchers freed the snakes to swim in freshwater tanks, most immediately drank significant amounts. More experiments revealed the snakes would drink only freshwater or highly diluted saltwater.

The kraits may get their freshwater from springs or streams around Orchid Island deed, the researchers observed far more sea snakes near these freshwater sources than in strictly marine sites, the paper says.

Lillywhite believes the sea snakes that spend their lives in the open ocean drink water from the "lens" of freshwater that sits atop saltwater during and after rainfall, before the two have had a chance to mix. That would explain why some seawater lagoons, where the waters are calmer due to protection from reefs, are home to dense populations of sea snakes the freshwater lens persists for longer periods before mixing into saltwater.

Rather than helping sea snakes gain water, the snakes' salt gland may help the snakes with ion balance moving excess salts from the bloodstream, Lillywhite said.

Some sea snake species living in dry regions may already be suffering as a result of climate change. Lillywhite said a colleague in Australia, which is in the midst of a historic drought, has observed declines and possible extinctions in some species at Ashmore Reef, ho
'/>"/>

Contact: Harvey Lillywhite
hbl@zoo.ufl.edu
352-392-1101
University of Florida
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Snakes, salamanders and other creatures thrive in areas with higher deer populations
2. The evolution of aversion: Why even children are fearful of snakes
3. Magnetic snakes control fluids, gravity-defying droplets, and solving a dragonfly mystery
4. Turning freshwater farm ponds into crab farms
5. Silent streams? Escalating endangerment for North American freshwater fish
6. Biological invasions increasing due to freshwater impoundments, says CU-Boulder study
7. New planning grants to fund research on freshwater issues
8. Freshwater herring had salty origin
9. Conservation of freshwater fish biodiversity: a challenge for the countries of the South
10. Ecological genetics of freshwater bacteria surveyed
11. Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... hippocampus, the marginal division of the striatum is ... the impact degree of substance P in the ... Yan Yu and his team, College of Biophotonics, ... staining, that substance P receptor, neurokinin 1 was ... division of normal rats. Unilateral or bilateral injection ...
(Date:7/11/2014)... that let nerve cells send out electrical signals, Johns ... tactic that may offer a new way to protect ... responsible way. , Their findingthat naturally occurring insect ... for a closely related onesuggests that insecticides can be ... like bees. A summary of the research, led by ...
(Date:7/10/2014)... 27, 2014  Pomerantz LLP has filed a ... or the "Company")(NYSE-MKT: PVCT) and certain of its ... District Court, Middle District of Tennessee ... a class consisting of all persons or entities ... December 17, 2013 and May 22, 2014, both ...
Breaking Biology News(10 mins):Potent spider toxin 'electrocutes' German, not American, cockroaches 2Potent spider toxin 'electrocutes' German, not American, cockroaches 3SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 2SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 3
... Ore. The northern spotted owl, a threatened species ... long run from active management of the forest lands ... to stand-replacing fire, researchers conclude in a recent study. ... thinning, or other fuel reduction activities in areas with ...
... gas could become an important source of renewable energy, ... Researchers at both campuses are raising colonies of ... turn electrical energy into pure methane the key ... create large microbial factories that will transform clean electricity ...
... sciences have become especially data-intensive. As researchers rely ... than observations to collect data, discovering, integrating and ... to researchers, ability to address complex questions about ... in it. On March 29, 2012, President ...
Cached Biology News:Active forest management to reduce fire could help protect northern spotted owl 2Stanford-Penn State scientists use microbes to make 'clean' methane 2Stanford-Penn State scientists use microbes to make 'clean' methane 3Stanford-Penn State scientists use microbes to make 'clean' methane 4DataONE answers the call for new tools to study the Earth in this era of Big Data science 2
(Date:7/11/2014)... BCC Research ( http://www.bccresearch.com ) reveals in its ... TECHNOLOGY: GLOBAL MARKETS , the global market for digital ... in 2013. This is estimated to grow to $490 ... rate (CAGR) of 28.6%. , New digital PCR technology ... within the broader PCR field. The opportunities presented by ...
(Date:7/11/2014)... -- Researchers have pioneered a revolutionary new way to ... Virtual Finger, allows scientists to move through digital ... using the flat surface of their computer screens. ... orders of magnitude more efficient, saving time, money ... areas of experimental biology. The software and its ...
(Date:7/10/2014)... (PRWEB) July 10, 2014 Product ... in very low abundance and are often “lost ... and time-consuming. , Join presenters Dr. Rowel Tobias, ... Dr. John Anders, Head of Quality at Nanotherapeutics, ... approach that can speed detection and quantitation while ...
(Date:7/10/2014)... Mass. (PRWEB) July 10, 2014 Terascala, ... today announced that Alan Swahn, a former vice president ... executive team as vice president of marketing. Terascala’s software ... Dell and NetApp create the highest performance and most ... been appointed to guide Terascala’s channel expansion and broaden ...
Breaking Biology Technology:Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 3Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 2Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 3Novel Ms Techniques Speed Detection of Biopharmaceutical Product and Process Impurities, New Webinar Hosted by Xtalks 2Terascala Expands Executive Team 2Terascala Expands Executive Team 3
... River Systems announces,the successful development and operation of ... the development of its Monarch250(TM) proton,therapy system. This ... that cyclotrons at this high field strength can ... increasing the operating,magnetic field, Still River Systems is ...
... May 21 Prime Therapeutics (Prime), a,thought ... that it has,received accreditation from the National ... Verified Internet Pharmacy Practice,Sites(TM) (VIPPS(R)) Program., ... by NABP in response to,consumers, concerns regarding ...
... Aton Pharma, Inc., a global,specialty pharmaceutical company, ... distribution agreement with PharmaLink Asia Pacific Pte. Ltd.,to ... in Asia and,Australia., "This partnership marks an ... to expand access to our medically essential portfolio ...
Cached Biology Technology:Still River Systems Announces Operation of the World's Highest Magnetic Field Cyclotron 2Prime Therapeutics Receives VIPPS Accreditation 2Aton Pharma Announces Distribution Partnership in the Asia Pacific Region 2
Multidrop Micro high speed 1 l bulk reagent dispenser rapidly, precisely and accurately dispenses microvolumes of 1-50 l into 384- and 96-well microplates....
...
...
Buckets for tube holder inserts...
Biology Products: