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 A Map of the Cell’s Power Station
18.08.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

nachricht On the way to developing a new active ingredient against chronic infections
21.08.2017 | Deutsches Zentrum für Infektionsforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Nagoya physicists resolve long-standing mystery of structure-less transition

21.08.2017 | Materials Sciences

Chronic stress induces fatal organ dysfunctions via a new neural circuit

21.08.2017 | Health and Medicine

Scientists from the MSU studied new liquid-crystalline photochrom

21.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>