Featured Research

from universities, journals, and other organizations

New electric fish genus, species discovered in Brazil's Rio Negro

Date:
April 22, 2014
Source:
University of Massachusetts at Amherst
Summary:
Discovery of a new species of electric knife fish in the Amazon Basin in Brazil is leading to a new interpretation of classifications and interrelationships among closely related groups. As the diversity of electric fishes becomes more thoroughly documented, researchers will be able to explore possible causes of this group's adaptive radiation over evolutionary time.

This image shows Procerusternarchus pixuna, the new species collected in shallow tributaries of the upper Negro river, a tributary of in Amazon River in Brazil.
Credit: University of Massachusetts at Amherst

Scientists at the University of Massachusetts Amherst and the Instituto Nacional de Pesquisas da Amazônia (INPA), Brazil, this week report that they have discovered a new genus and species of electric knifefish in several tributaries of the Negro River in the Amazonia State of Brazil.

Related Articles


Professor Cristina Cox Fernandes at UMass Amherst, with Adília Nogueira and José Antônio Alves-Gomes of INPA, describe the new bluntnose knifefish in the current issue of the journal Proceedings of the Natural Sciences of Philadelphia.

Their paper offers details about the new genus and species' anatomy, range, relationship to other fish, salient features of its skeleton, coloration, electric organs and patterns of electric organ discharge (EOD). True to their name, these fish produce electric discharges in distinct pulses that can be detected by some other fish.

Cox-Fernandes says the discovery of this species is leading to a new interpretation of classifications and interrelationships among closely related groups. She adds that as the diversity of electric fishes becomes more thoroughly documented, researchers will be able to explore possible causes of this group's adaptive radiation over evolutionary time.

Last year, with colleagues including ichthyologist John Lundberg at the Academy of Science in Philadelphia and others at Cornell University and INPA, the UMass Amherst fish biologist co-authored a description of three other electric fishes. The authors provided details about the most abundant species of apteronotid, so-called "ghost knife fishes," another family of electric fish very common in the Amazon River and its large tributaries.

In the early 1990s, Cox-Fernandes recalls, when she began her studies of the communities and diversity of electric fishes, fewer than 100 species were then scientifically described. But with the current journal article and studies by herself and others, the number has roughly doubled today. Electric fishes are of little commercial importance, but in her opinion fishes of the Neotropics, especially in the Amazon, are still "under studied," and more taxonomic studies such as the one are needed.

She adds, "As environmental changes affect rivers worldwide and in the Amazon region, freshwater fauna are under many different pressures. Fish populations are dwindling due to the pollution, climate change, the construction of hydroelectric plants and other factors that result in habitat loss and modification. As such the need to document the current fish fauna has become all the more pressing."


Story Source:

The above story is based on materials provided by University of Massachusetts at Amherst. Note: Materials may be edited for content and length.


Cite This Page:

University of Massachusetts at Amherst. "New electric fish genus, species discovered in Brazil's Rio Negro." ScienceDaily. ScienceDaily, 22 April 2014. <www.sciencedaily.com/releases/2014/04/140422121235.htm>.
University of Massachusetts at Amherst. (2014, April 22). New electric fish genus, species discovered in Brazil's Rio Negro. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2014/04/140422121235.htm
University of Massachusetts at Amherst. "New electric fish genus, species discovered in Brazil's Rio Negro." ScienceDaily. www.sciencedaily.com/releases/2014/04/140422121235.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Newsy (Nov. 22, 2014) — For the first time Monterey Bay Aquarium recorded a video of the elusive, creepy and rarely seen anglerfish. Video provided by Newsy
Powered by NewsLook.com
Birds Around the World Take Flight

Birds Around the World Take Flight

Reuters - Light News Video Online (Nov. 22, 2014) — An imperial eagle equipped with a camera spreads its wings over London. It's just one of the many birds making headlines in this week's "animal roundup". Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) — Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Raw: Baby Okapi Born at Houston Zoo

Raw: Baby Okapi Born at Houston Zoo

AP (Nov. 20, 2014) — The Houston Zoo released video of a male baby okapi. Okapis, also known as the "forest giraffe", are native to the Democratic Republic of the Congo in Central Africa. Video is mute from source. (Nov. 20) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins