Navigation Links
Darkness stifles reproduction of surface-dwelling fish
Date:5/10/2011

There's a reason to be afraid of the dark.

Fish accustomed to living near the light of the water's surface become proverbial "fish out of water" when they move to dark environments like those found in caves, according to a study from North Carolina State University.

In research published this week in Biology Letters, a Royal Society scientific journal, NC State post-doctoral researcher Rdiger Riesch and colleagues found that Atlantic molly females from regular surface streams have a difficult time adjusting to cavelike conditions. Surface female fish had trouble reproducing in the dark conditions, study results show. In addition, many surface-dwelling females introduced to dark conditions surprisingly, according to the researchers suffered from high incidents of stress-induced bacterial columnaris disease, or "fin rot," which causes patchy lesions on the bodies of the fish.

"Permanent darkness severely hampers reproduction in surface-dwelling females," Riesch says. "But this study also shows that the successful colonization of a subterranean habitat must have been a rare event for Atlantic mollies."

The study was designed to provide an answer to why Atlantic mollies their scientific name is Poecilia mexicana living close to each other in and near a cave in southern Mexico can evolve in different ways. These population differences are normally attributed to geographic separation like mountain ridges or some other physical barrier but no physical barrier exists in or around the cave where these Atlantic mollies live.

In the study, the researchers placed some Atlantic mollies in cavelike total darkness while others received a "normal day" of 12 hours of light and 12 hours of darkness.

Most of the cave-dwelling fish of either sex as well as male surface-dwelling fish performed well in both light and darkness. Surface-dwelling females, however, did not breed well or ma
'/>"/>

Contact: Rudiger Riesch
rwriesch.evolutionarybiology@gmail.com
919-513-7552
North Carolina State University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness
2. Beyond sunlight: Explorers census 17,650 ocean species between edge of darkness and black abyss
3. Adapting to darkness: How behavioral and genetic changes helped cavefish survive extreme environment
4. The world is full of darkness, reflected in the physiology of the human retina, Penn researchers say
5. December 2008 highlights from Biology of Reproduction
6. Attitudes towards assisted reproduction and preimplantation genetic diagnosis
7. Low level herbicide use can damage potato reproduction
8. February 2009 highlights from Biology of Reproduction
9. Drugs needed to preserve eggs for reproduction need to be given in stages
10. Yeast missing sex genes undergo unexpected sexual reproduction
11. Study shows value of sexual reproduction versus asexual reproduction
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Darkness stifles reproduction of surface-dwelling fish
(Date:7/11/2014)... with other group members to reduce aggression and gain ... strategy for grooming activities shows a certain pattern across ... scientific journal Biology Letters . , Grooming between ... without ulterior motives. To be groomed has hygienic benefits ... another individual can provide access to infants, mating opportunities ...
(Date:7/11/2014)... kidney injury related to the use of hydroxyethyl starch ... molecules, according to a report in Anesthesia & ... Society (IARS). , The "total mass of HES molecules" ... renal proximal tubule cells (PTCs), concludes the laboratory study ... Wrzburg, Austria. Other factorssuch as differences in the ...
(Date:7/11/2014)... Evidence exists that cannabinoid receptor type 1 ... Ca2+ influx, and reduce neurotransmitter release. However, ... 1 can increase extracellular Ca2+ influx and ... his team, Tongji Hospital Affiliated to Tongji ... Technology, China used whole cell voltage-clamp and ...
Breaking Biology News(10 mins):Baboons groom early in the day to get benefits later 2In lab studies, hydroxyethyl starch has direct harmful effects on kidney cells 2
... ways to automate the production of DNA and proteins, making ... complex carbohydrates, it,s been a different story. Until now, ... study has been slow and tedious. In what may change ... Georgia has created a method for the rapid chemical synthesis ...
... MADISON The "mineral-breathing" bacteria found in many ... or anaerobic, environments contain microbes sometimes described as "mineral-breathing" ... the same way we use oxygen. According to a ... Nature Geoscience , this bacterial respiration may be accelerated ...
... microbicide based on a new type of anti-HIV drug found ... similar to HIV, according to a study reported at the ... is the first of a gel with an integrase inhibitor, ... for the treatment of HIV but just one of the ...
Cached Biology News:New method for producing 'libraries' of important carbohydrate molecules 2New method for producing 'libraries' of important carbohydrate molecules 3Organic solids in soil may speed up bacterial breathing 2Vaginal gel with integrase inhibitor shows promise in monkeys 2Vaginal gel with integrase inhibitor shows promise in monkeys 3Vaginal gel with integrase inhibitor shows promise in monkeys 4Vaginal gel with integrase inhibitor shows promise in monkeys 5Vaginal gel with integrase inhibitor shows promise in monkeys 6
(Date:7/10/2014)... 2014 Unraveling life’s mysteries can intrigue, ... Archer Family purchased a DNA test to ... up with a lifetime of memories, sharing, and closeness. ... members’ DNA genuinely brought the family closer together. ... into genetic history and prior to taking the ...
(Date:7/10/2014)... 2014 EvoDerma ’s NOOME Anti-Aging Motion ... device now comes with a second treatment cup to help ... The new cup is thinner on the edges for a ... rough, thin and uneven surfaces on the face, neck and ... stimulating treatment on areas such as the cheeks and neck, ...
(Date:7/10/2014)... 2014 On July 9 Prime ... presented Russia,s first national "Industry" ... Company is developing a unique project called MabNext ... a number of innovative drugs based on monoclonal antibodies ... took place at the International Exhibition "Innoprom 2014" in ...
(Date:7/10/2014)... , July 10, 2014 Research ... addition of the "International Photonic Integrated Circuit ... Forecasts to 2019" report to their offering. ... The concept of photonic integration traces its ... century. The promise of photonic integration went unexplored ...
Breaking Biology Technology:Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2
... Md. - Engineers at the University of Idaho have ... upcoming NASA missions that will study the Earth and ... a grant technical officer Pen-Shu Yeh, a senior engineer ... engineering team at the University of Idaho,s ...
... sensitive microscopy developed by researchers at Harvard University could ... scientists to track the location of minuscule metabolites and ... of any kind of fluorescent labeling. , The technique, ... the vibrations in chemical bonds between atoms. SRS microscopy ...
... iPods to those who test their knowledge at www.synbioproject.org ... Among the 75 people Esquire magazine recently chose as ... an emerging discipline that combines science and engineering in order to ... as synthetic biology. , , ...
Cached Biology Technology:New one-of-a-kind technology will fly on 2 NASA missions 2New one-of-a-kind technology will fly on 2 NASA missions 3New label-free method tracks molecules and drugs in live cells 2Synthetic Biology Importance in the 21st Century 2Synthetic Biology Importance in the 21st Century 3
... Digital Sight DS-L2 imaging controller is a ... DS-L1, and allows users to comfortably observe, ... DS-L2 controller features an 8.4 inch LCD ... variety of Nikon cameras including the DS-Fi1 ...
... a premium quality recombinant form of Thermus ... suitable for a wide range of PCR ... reproducible performance, each preparation is extensively tested ... NovaTaq DNA Polymerase possesses an integral 5′→3′ ...
Mouse polyclonal antibody raised against a partial recombinant TSEN2. NCBI Entrez Gene ID = 80746...
Mouse polyclonal antibody raised against a partial recombinant NCLN. NCBI Entrez Gene ID = 56926...
Biology Products: