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Evolutionary Development of the Strange Sucking Disc of Sharksuckers

Evolutionary Development of the Strange Sucking Disc of Sharksuckers | AL_TU research | Scoop.it

According to a new study conducted by ichthyologists Dr Ralf Britz of the Natural History Museum and Dr David Johnson of the Smithsonian National Museum of Natural History, the skeleton of the sharksucker fish’s disc is formed in development through the expansion of both the bases of the dorsal fin spines and the distal radial elements of the fin supports.

Sharksucker fish with its unusual sucking disc on its head (Dave Johnson)

Sharksuckers, also called remoras, are a group of 8 species in the fish family Echeneidae. They are the only fish with a sucking disc. Their closest relatives are the cobia and dolphin fish.

 

Sharksuckers use the spines and suction of their sucking disc to attach themselves to large marine animals. They don’t seem to cause any harm, or benefit, to the animal they’re attached to, and they live off scraps of food, faeces or parasites from the larger animal. Some people are known to use sharksuckers to catch other fish, throwing them into the sea attached to a fishing line and pulling them in once they are attached to a larger sea animal.

The ichthyologists investigated how the sucking disc develops in larval fish of the genus Remora. They took snapshots of the developmental stages, staining the bones red to see changes more clearly.

 

To see whether the sucking disc is created from the existing dorsal fin that most other fish have, they looked at how the dorsal fin developed in the same early stages in another fish, of the genus Morone(temperate basses), which has a typical dorsal fin as an adult consisting of spinous and soft dorsal fin parts. They compared the two.

 

Such comparisons help to establish whether structures in different species have the same evolutionary origin despite looking and functioning differently. Up to a certain stage in the fishes development, the dorsal fin can be seen developing in the same way and looking very similar in both fishes. Then, over a series of small changes, the dorsal fin in the Remora begins to expand and shift towards the head.

 

By the time the Remora has reached around 30 mm in length, the dorsal fin has become a fully formed 2 mm sucking disc. It still has the components found in the dorsal fin, the tiny fin spines, spine bases and supporting bones, but the spine bases have greatly expanded. So, the sucking disc is formed by a massive expansion of the dorsal fin through small changes while the fish is developing. It is not the result of the evolution of a completely new structure.

 

“What keeps impressing me when I study the development of some of the weirdest structures in the fish world is that natura non facit saltus, ‘nature does not make jumps,’ and even the strangest anatomical modifications happen through small gradual changes in development,” said Dr Britz, whoreported the findings in the Journal of Morphology.


Via Dr. Stefan Gruenwald
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AL_TU: paraDOCs_DRY

AL_TU: paraDOCs_DRY | AL_TU research | Scoop.it
parametric, workshop, munich, muenchen, germany, fablab
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CLUSTER 1 - DON'T REPEAT YOURSELF - Munich, Germany

CAD vocabulary - basic and advanced modeling techniques and introduction to parametric design. 

 

This cluster will focus on general knowledge related to the topic of computational design. It will provide an introduction to how architectural tools emerged from different fields and how they keep on improving the discipline. It is a basic course which addresses people who need support in their parametric endeavors.

 

Participants will go through a series of assisted tutorials regarding nurbs modeling techniques in order to better appreciate the second part of the cluster regarding the automation of design processes. 

 

For more details follow:

https://www.facebook.com/ALTU.cdrl

http://all-2.blogspot.co.uk/2014/06/paradocsdry.html

 

FacebookEvent:

https://www.facebook.com/events/309436859222382/

 

Registration Form:

https://docs.google.com/forms/d/1ROkWZwa64H88eO8Uhso7cfs9ib4p-LEqtnAbQRgtXFQ/viewform

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AL_TU: P3 PAVILION

AL_TU: P3 PAVILION | AL_TU research | Scoop.it
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This pavilion—flexible enough to host numerous KAT events—would be an expression of both applied physical forces and imposed design decisions acting as shape defining criteria. The final design is based on a formal concept—defined by the usage of natural forces in order to generate catenary arches, a structural concept—which is a result of the superimposition of origami logic in order to define load bearing structural elements, and an intelligent connection concept—which rely on no binder and allow the repeated assembly and disassembly of the structure. For such a complex task to be grasped at once, the process had to be split in two distinctive parts: the form finding script and the connection and perforation script.


For more details:

http://all-2.blogspot.co.uk/2014/04/p3-pavilion.html

https://www.facebook.com/ALTU.cdrl

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RoboFab Winter 2014

RoboFab Winter 2014 | AL_TU research | Scoop.it

Via Ionut Anton
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Ionut Anton's curator insight, January 25, 2014 5:28 AM

Robotic fab tutorial

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Digital Forming

Digital Forming | AL_TU research | Scoop.it

publish your 3d printing designs with intelectual property protection


Via Ionut Anton
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You Won't Believe These Patterns Created by Flocks of Birds in Flight

You Won't Believe These Patterns Created by Flocks of Birds in Flight | AL_TU research | Scoop.it
When birds travel in flocks, their behavior takes on emergent properties. Out of the chaos of flight, gorgeous, geometric patterns coalesce.
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Building Tensile Structures with Flying Machines

Building Tensile Structures with Flying Machines | AL_TU research | Scoop.it
Building tensile structures with flying machines in the ETH Zurich Flying Machine Arena. The video shows quadrocopters assembling prototypical tensile struct...

Via Alessio Erioli
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Ferroux

*UPDATE New video is up. Check out Ferienne: https://vimeo.com/42692741 _______________________ Second installation of my ongoing series focused on analog…

Via Alessio Erioli
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P3 workshop movie

Vimeo is the home for high-quality videos and the people who love them.
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Amazing video about the P3 Workshops and its result! A must watch!

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Modeling complex systems with adaptive networks

Modeling complex systems with adaptive networks | AL_TU research | Scoop.it

Via amleto picerno
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Richard Platt's curator insight, October 20, 2013 12:29 PM

More tools for analyzing complex systems to find contradicitons, mmmm problems being solved 

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Pawilon P^3 na Politechnice Łódzkiej, 2013.10.18

Projekt powstał w trakcie warsztatów zorganizowanych przez Koło Naukowe Studentów Architektury KĄT prowadzonych przez tutorów z Dessau. Otwarcie pawilonu prz...
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A walkthrough and few explanations regarding the P3 Workshops and P3 Pavilion project (polish version)

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Doctoral Thesis, online – runberger.net

Doctoral Thesis, online – runberger.net | AL_TU research | Scoop.it

Via Ionut Anton
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Ionut Anton's curator insight, October 14, 2013 2:17 PM

A very well written PhD thesis on the parametric design with excelent examples from great student projects.

Rescooped by Tudor Cosmatu from digital design
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SlideRule Searches for the Best Online Courses in Any Category

SlideRule Searches for the Best Online Courses in Any Category | AL_TU research | Scoop.it
Online classes are a great way to learn new skills. SlideRule makes your search easier by letting you browse and search through over 17,000 online courses.

Via Alessio Erioli, Irina Bogdan
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Free eBook - How Gamification Reshapes Learning

Free eBook - How Gamification Reshapes Learning | AL_TU research | Scoop.it
The Learning Professionals Free Gamification eBook. Would you be interested in the Most Effective Uses of Gamification in Learning?

Via Louisa Lambregts
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Louisa Lambregts's curator insight, March 15, 2014 10:43 AM

A series of articles from various elearning professionals regarding when gamification works the best.

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Small Wooden Building | Pavillon in Alberschwende

Small Wooden Building | Pavillon in Alberschwende | AL_TU research | Scoop.it
The "Pavilion for one Summer" was designed by Manuel Fabian Hartmann and his team attending the subject “design and construction” at the university of Innsbruck in the summer term 2013. The aim was...

Via Ionut Anton
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Ionut Anton's curator insight, December 5, 2013 2:33 AM

Lightweight parametric construction

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Everything I Know: 42 Hours of Buckminster Fuller’s Visionary Lectures Free Online (1975)

Everything I Know: 42 Hours of Buckminster Fuller’s Visionary Lectures Free Online (1975) | AL_TU research | Scoop.it
Think of the name Buckminster Fuller, and you may think of a few oddities of mid-twentieth-century design for living: the Dymaxion House, the Dymaxion Car, the geodesic dome.
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42 Hours of Buckminster Fuller’s Visionary Lectures

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Tough, Light and Strong: Lessons From Nature Could Lead to the Creation of New Materials

Tough, Light and Strong: Lessons From Nature Could Lead to the Creation of New Materials | AL_TU research | Scoop.it

In a sweeping review of the field of bio-inspired engineering and biomimicry in the Feb. 15 issue of the journal Science, two engineers at the University of California, San Diego, identify three characteristics of biological materials that they believe engineers would do well to emulate in man-made materials: light weight, toughness and strength.


Via Michele Diodati, TWNDigest, Dr. Stefan Gruenwald
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Knitting A Building: My Thread Pavilion for Nike - eVolo | Architecture Magazine

Knitting A Building: My Thread Pavilion for Nike - eVolo | Architecture Magazine | AL_TU research | Scoop.it
Architecture and Design Magazine for the 21st Century. Organizer of the Annual Skyscraper Architectural Competition.

Via Roberto S L Naboni
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DNA disPLAY

DNA disPLAY - BioMod 2013 The DNA disPLAY project attempts to take-on the challenge of DNA design by making DNA both physical and visual as a new creative medium.…
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Mussel

Mussel | AL_TU research | Scoop.it
MUSSEL is a free and open source tool for generating RAPID code for ABB robots.  Most simply, it allows you to generate working code from a list of input plane…

Via Ionut Anton
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Ionut Anton's curator insight, October 20, 2013 10:55 AM

Open source tool for controlling ABB robots

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YOU Reshape | Digital Craft Competition

YOU Reshape | Digital Craft Competition | AL_TU research | Scoop.it

Via Ionut Anton
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Ionut Anton's curator insight, October 18, 2013 7:12 AM

Reshape traditional craft with the digital competition

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Otwarcie Pawilonu P^3 Pavilion Opening | Facebook

Otwarcie Pawilonu P^3 Pavilion Opening | Facebook | AL_TU research | Scoop.it
Tudor Cosmatu's insight:

The p3 Pavilion is done! Join us for the opening ceremony on Sunday 20th October at 19:00!

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