Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Smithsonian finds color patterns in fish larvae may reveal relationships among species

25.07.2013
Similarities in how different organisms look can indicate a close evolutionary relationship.

Conversely, great differences in appearance can suggest a very distant relationship, as in many adult marine fish species. For the first time, however, a Smithsonian scientist has found that color patterns of different fish species in the larval stage can be very similar, revealing a closer evolutionary relationship than their adult forms would suggest. The research is published in the July issue of the Zoological Journal of the Linnean Society.


While the adult forms of these five labriformes species look different from one another as adults, here in their larval stage they are all very similar.

A: Halichoeres bivittatus
B: Halichoeres garnoti
C: Halichoeres maculipinna
D: Halichoeres poeyi
E: Thalassoma bifasciatum

Credit: Photos A−C by Julie Mounts and David Smith; D, E by Lee Weigt and Carole Baldwin.

Many marine fish species spend their larval stage near the ocean's surface¯an environment completely different than the one they are in as adults. Two different environments often require two different body shapes and appearances, resulting in fish in their larval stage that bear little to no resemblance to their adult counterparts.

Carole Baldwin, a zoologist at the Smithsonian's National Museum of Natural History, examined more than 200 species of marine fishes in their larval stage, primarily from the western Caribbean. She found that in many cases larval color patterns of different species were very similar, contributing evidence to a phylogenic relationship.

"Biologists, artists and tropical fish aquarists have described, illustrated or photographed color patterns in adult marine fishes for centuries, but color patterns in marine fish larvae have largely been neglected," said Baldwin. "Yet the larval stages of many marine fishes have subtle to striking, ephemeral color patterns that can potentially tell us a lot about a species' place on the taxonomic family tree."

Adult mullets, for instance, are very different in appearance than adult flying fish, yet when Baldwin examined these fishes in the larval stage she noticed that they share a unique transformation of color pattern that supports the idea that they could be closely related. Larvae of some species in the order Tetraodontiforme, like the pufferfish, and those in the order Lophiiforme, like the anglerfish, are strikingly similar in having the trunks of their bodies enclosed in an inflated yellow sac. Their appearance as adults, however, would not hint at a close relationship.

"More investigation of larval color patterns in marine fish is needed to fully assess their value in phylogenic reconstruction," said Baldwin. "But the evidence I've found so far is promising that this will be an important taxonomic resource in the future."

Color information on many more marine fish larvae is needed to fully use this new suite of evolutionary information, and Baldwin will encourage colleagues to obtain color photographs of larvae when possible. And studies on the formation of pigment, such as those conducted on the model freshwater zebrafish (Danio species), are needed.

John Gibbons | EurekAlert!
Further information:
http://www.si.edu

Further reports about: Smithsonian fish larvae fish species marine fish marine fish species

More articles from Life Sciences:

nachricht Polymers Based on Boron?
18.01.2018 | Julius-Maximilians-Universität Würzburg

nachricht Bioengineered soft microfibers improve T-cell production
18.01.2018 | Columbia University School of Engineering and Applied Science

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

Im Focus: A thermometer for the oceans

Measurement of noble gases in Antarctic ice cores

The oceans are the largest global heat reservoir. As a result of man-made global warming, the temperature in the global climate system increases; around 90% of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Polymers Based on Boron?

18.01.2018 | Life Sciences

Bioengineered soft microfibers improve T-cell production

18.01.2018 | Life Sciences

World’s oldest known oxygen oasis discovered

18.01.2018 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>