Sentences with phrase «pectoral fins of»

The forelimbs of tetrapod evolved from the pectoral fins of the ancestral fish.

To determine whether shifts in the balance of anterior and posterior field occurred during fin - to - limb evolution, Onimaru, postdoctoral researcher currently at Sharpe's lab (CRG), and his colleagues carefully compared the expression, function and regulation of genes involved in anterior - posterior patterning in pectoral fins of catsharks, with those of mice.

They compared the forces experienced by the pectoral fins of the mudskipper fishes to the forelimbs and hind limbs of walking tiger salamanders.

Nerves in the pectoral fins of fish detect the fin rays» position and how much they bend as they move through the water, which helps the fish sense speed and the relative position of their fins.

With this history of fin evolution in place, the researchers also tested the mechanical properties and sensory system sensitivity in the pectoral fins of four pairs of closely related Labrid species, one with low AR fins and one with independently evolved high AR fins.

Not exact matches

Often called living fossils, these eel - like misfits have lungs and fleshy pectoral fins, bony plates and thick scales reminiscent of ancient fossil fish, and flag - like fins along their back that are unique.

The fins that were eventually installed on the robot are a pair of flexible pectoral fins made using PVC sheets.

It is actually a modification of the fish's pectoral and pelvic fins.

While it is small enough to, yes, fit in your pocket, it's dubbed «pocket» because of the distinctive orifice behind its pectoral fin — one of many physiological features scientists hope to better understand.

Biologists studying fossils in the 19th century thought that coelacanths, with their fleshy ventral and pectoral fins, were likely to have been the first fish to crawl out of the sea.

Another dozen closely related species of eel are found in the lake, but only in these two are the pectoral fins shrivelled or missing altogether.

Its pectoral fins, directly behind its head on either side, are enormous and resemble the wings of a butterfly.

«As pectoral fins evolve different shapes, behaviors, and mechanical properties, we've shown that the sensory system is also evolving with them,» said Brett Aiello, a PhD student in the Department of Organismal Biology and Anatomy, and the lead author of the study.

Backlit egg case of a little skate embryo (Leucoraja erinacea), showing emerging pectoral and pelvic fins, external gills, and a large yolk.

The results showed that that mudskippers» pectoral fins experience more medial forces than the limbs of salamanders, and that the forelimbs could have a played a similar weight - bearing role as the hind limbs.

«We discovered that male zebrafish have a very important set of structures on their pectoral fins that they use for breeding and that these structures secrete a potent molecular inhibitor of a key signaling pathway to aid their cycles of regular replacement,» explains senior author Kenneth Poss of Duke University Medical Center.

When the researchers experimentally «posteriorised» pectoral fin buds of catsharks, the fins lost anterior skeletal elements, and showed a single bone connected to the pectoral girdle, as seen in fossil Tiktaalik pectoral fins.

Led by first author Junsu Kang, the scientists identified anatomical structures that male fish use during mating that produce a signal that impedes regeneration of the pectoral fins after injury.

Humpback whales are a baleen whale and are renowned for their spectacular behaviour of leaping out of the water, rolling in the air with their huge pectoral fins outstretched like wings, and crash noisily back into the water.

The whale pushes her away from the shark using its head, tucks her under its pectoral fin, and even lifts her out of the water.

Descending down past ledges of pore corals your attention will soon be taken by the common lionfish, sometimes hidden under rock protusions, but often seen parading up and down the wall with their spectacular, barbed pectoral fins raised in display.

The pectoral fin tips extend to the origin of the pelvic fins.

Imagine the thrill of a 50 foot, 40 ton whale as it launches itself out of the water in striking fashion right before your eyes, then waves its pectoral fins and slaps its tail.

Their distinctive body shape makes this particular type of whale easy to identify thanks to long pectoral fins, a knobby head and the mammal's unique water breaching style, but it's not usually found in Belize waters, so visitors were both taken aback by the sighting and thrilled.

Lastly a number of dwarf lionfish — distinguishable by the fact that the pectoral fin is a single filament, not separated as in the common lionfish.

Their fins are also different from normal, with their pectoral fins being small, circular, and yellow, and their tailfins being split into two lobes instead of the usual three.

Fifteen years ago, in Baja, I watched fishermen unload huge (bigger than baths) tubs of massive fins (mostly dorsal and pectoral fins), on a more recent trip, the fins were not much bigger than my palm in a couple of buckets.