• The caudal fins of adult zebrafish are supported by multiple bony rays that are laterally interconnected by soft interray tissue. (biologists.org)
  • Here, we developed an experimental setup to measure the elastic properties of caudal fins in vivo by applying micro-Newton forces to obtain bending stiffness and a tensional modulus. (biologists.org)
  • If you notice, 4 of the rays of the lower part of his caudal fins have broken off. (hubpages.com)
  • That extinct animal actually had large, strong and mobile hind fins and an enlarged pelvis, suggesting that limbs in the front and rear evolved simultaneously. (washingtonpost.com)
  • That went against the "front-wheel-drive" hypothesis that held limbs first evolved from front fins, while back fins stayed small , maybe even after fish transitioned to land. (washingtonpost.com)
  • In the Late Devonian period about 350 million years ago, the first vertebrates to adapt to land were amphibians, and it is believed that their ancestors were primitive, now-extinct fish with fin-like limbs and belonging to the class Sarcopterygii. (titech.ac.jp)
  • In my lab, we have been studying the developmental mechanisms responsible for the evolution of fins and limbs. (titech.ac.jp)
  • Through research using catshark embryos, Tanaka's team revealed that the balance of the anterior (thumb side) and posterior fields in fin buds shifted as evolution progressed from fins to limbs. (titech.ac.jp)
  • Regeneration epidermises of salamander limbs or teleost fins are known to express markers of developmental signaling pathways, including many secreted factors [ 8 , 14 ]. (prolekare.cz)
  • The limbs had evolved from fins. (gopetsamerica.com)
  • In order to understand how fins may have evolved into limbs, researchers led by Dr. Gómez-Skarmeta and his colleague Dr. Fernando Casares at the same institute introduced extra Hoxd13, a gene known to play a role in distinguishing body parts, at the tip of a zebrafish embryo's fin. (phys.org)
  • Congress is considering toughening its 2000 ban on finning, in which fishermen chop off fins from a shark and throw it back into the ocean to die. (orlandosentinel.com)
  • Another signaling pathway under the control of the so-called Wnt5b protein then turns down these genes, impairs cell growth and inhibits fin regeneration. (livescience.com)
  • Here, we performed a large-scale, unbiased genetic screen for epithelial signaling deficiencies during the regeneration of amputated adult zebrafish fins, from which we identified several new mutants. (prolekare.cz)
  • One gene identified from this screen disrupts a specific component of the extracellular matrix material Laminin, Laminin beta 1a, a factor that we find to be dispensable in uninjured adult animals but required for all stages fin regeneration. (prolekare.cz)
  • Interestingly, fgf20a and igf2b ligand genes are induced within hours of fin amputation in mesenchymal cells, and perturbation of Fgf signaling via a mutation in the fgf20a ligand gene, or of Igf signaling by receptor inhibition, disrupts formation of the regeneration epidermis and subsequent bone regeneration [ 20 , 21 ]. (prolekare.cz)
  • Zebrafish therefore are a favored animal model to study the cellular and molecular principles of organ regeneration. (innovations-report.com)
  • We found that specific components of the Nucleosome Remodeling and Deacetylase complex (NuRD) are required for fin regeneration in zebrafish. (biomedcentral.com)
  • Transcripts of the chromatin remodeler chd4a /Mi-2, the histone deacetylase hdac1 /HDAC1/2, the retinoblastoma-binding protein rbb4 /RBBP4/7, and the metastasis-associated antigen mta2 /MTA were specifically co-induced in the blastema during adult and embryonic fin regeneration, and these transcripts displayed a similar spatial and temporal expression patterns. (biomedcentral.com)
  • Altogether, our data suggest that specialized NuRD components are induced in the blastema during fin regeneration and are involved in blastema cell proliferation and redifferentiation of osteoblast precursor cells. (biomedcentral.com)
  • Regeneration of the caudal fin proceeds through three main steps: 1) wound healing, 2) blastema formation, and 3) regenerative outgrowth, including differentiation and patterning. (biomedcentral.com)
  • Fins and flippers are aquatically adapted appendages and typically aren't very useful in such an environment. (wikipedia.org)
  • Feet, Fins, & Flippers 5K Thank Yous! (nmlc.org)
  • Thank you to everyone who participated in the adventure that became NMLC's first VIRTUAL Feet, Fins, & Flippers 5K! (nmlc.org)
  • With 303 participants from 25 states and 4 countries, as well as with the wonderful sponsors below, this year's Feet, Fins, & Flippers 5K was our most successful to date. (nmlc.org)
  • The irony is that shark fin is flavorless -- its cartilage has a chewy consistency. (cnn.com)
  • The soup uses only the fins' cartilage needles, which provide a gelatinous texture but no flavor. (orlandosentinel.com)
  • The study suggests that consumption of shark fin soup and cartilage pills may pose a significant health risk for degenerative brain diseases. (miami.edu)
  • We amplified a fragment of the cytochrome c oxidase subunit I gene from shark fin, cartilage and meat, as well as ray gill plates and meat for DNA sequencing. (springer.com)
  • Surprisingly, this led to the generation of new cartilage tissue and the reduction of fin tissue-changes that strikingly recapitulate key aspects of land-animal limb development. (phys.org)
  • In addition, isolated BTs have been observed in various areas, including the head, body and fins ( Chen and Arratia, 1996 ). (biologists.org)
  • Males are larger than females, have larger fins, an extended dorsal fin, and bolder color patterns on the body and fins. (encyclopedia.com)
  • While shark finning is illegal in the U.S., current federal laws banning the practice do not address the issue of the shark fin trade, so shark fins are imported to the U.S. from countries with few or even no shark protections in place," notes Oceana. (treehugger.com)
  • Shark fins are primarily derived through finning, a practice where by shark fins are removed at sea and the rest of the mutilated animal is thrown back in the water to die," said co-author Dr. Neil Hammerschlag, research assistant professor of Marine Affairs & Policy and director of the RJ Dunlap Marine Conservation Program (RJD) at UM. (miami.edu)
  • They are primarily killed for their fins alone, to fuel the growing demand for shark fin soup, which is an Asia delicacy. (miami.edu)
  • Not only does this work provide important information on one probable route of human exposure to BMAA, it may lead to a lowering of the demand for shark fin soup and consumption of shark products, which will aid ocean conservation efforts," added Hammerschlag. (miami.edu)
  • Will this effect the demand for shark fin soup and other shark fin products worldwide? (miami.edu)
  • The record haul was discovered in two containers from Ecuador, and highlights the continued demand for shark fin, which is served at wedding banquets in many Chinese communities. (yahoo.com)
  • However, as the demand for shark fin continues to rise, so too does the price, and shark fins have become a hot commodity. (greenpeace.org)
  • While their conservation becomes an ever more pressing concern, a major obstacle that hampers regulation is the mislabelling and/or misidentification of dried products or carcasses that have had fins removed. (springer.com)
  • During courtship, the female cichlid, Pelvicachromis taeniatus, displays a large and visually arresting purple pelvic fin. (wikipedia.org)
  • zf-tbx5 expression is restricted to the pectoral Fin bud, whilst zf-tbx4 transcripts are confined in the pelvic Fin bud. (nih.gov)
  • Each consignment consisting of 13 tonnes broke the previous record seizure of 3.8 tonnes of controlled shark fins made in 2019," customs official Danny Cheung told reporters. (yahoo.com)
  • In rock-hard, spinous fins the distal is often fused to the middle, or not present at all. (wikipedia.org)
  • The results suggest a scheme for the fin-limb transition in which the distal autopods (digits) are neomorphic structures produced by unequal proliferation of the posterior part of an ancestral appendix. (nih.gov)
  • The distal part of these cartilages articulate with the pectoral fin radials, and the proximal part articulate with the synarcual (fusion of the first vertebrae). (thefreedictionary.com)
  • Early in the preflexion stage, melanophores occur on the distal ~50-60% of the pectoral fin but they become more concentrated near the margin with development and are only on the distal 10-20% of the fin during the postflexion stage. (thefreedictionary.com)
  • During regenerative outgrowth, the blastema progenitor cells are maintained at the distal margin, while their daughter cells progressively redifferentiate in the proximal part of the fin regenerate. (biomedcentral.com)
  • We found that in the zebrafish, the mouse Hoxd13 control element was capable of driving gene expression in the distal fin rudiment. (phys.org)
  • As they swim, they use other fins, such as dorsal and anal fins, to achieve stability and refine their maneuvering. (wikipedia.org)
  • Nevertheless, they cannot swim faster because the cavitation bubbles create a vapor film around their fins that limits their speed. (wikipedia.org)
  • Veterinary and medical scientists wonder if warm-blooded animals that evolved from these simpler creatures, might still have untapped regenerative powers hidden in their genes. (livescience.com)
  • To compare the relative importance of Hox genes during fin versus limb morphogenesis, we cloned zebrafish (Danio rerio) HoxD and HoxA complex genes and analysed their expression during fin development. (nih.gov)
  • Whole mount in situ hybridization revealed specific expression of these genes in the eye and Fin buds. (nih.gov)
  • As director of the department of comparative medicine at the Johns Hopkins School of Medicine, the 52-year-old scientist, who holds doctorates in veterinary medicine and in pathology, studies the way similar diseases attack humans and animals. (baltimoresun.com)
  • Which raises the question: does bird watching or being around animals in nature (that we can't touch) help humans emotionally too? (pawmanefin.com)
  • A new study by University of Miami (UM) scientists in the journal Marine Drugs has discovered high concentrations of BMAA in shark fins, a neurotoxin linked to neurodegenerative diseases in humans including Alzheimer's and Lou Gehrig Disease (ALS). (miami.edu)
  • The concentrations of BMAA in the samples are a cause for concern, not only in shark fin soup, but also in dietary supplements and other forms ingested by humans," says study co-author Prof. Deborah Mash, Director of the University of Miami Brain Endowment Bank. (miami.edu)
  • The computer simulations provided an unprecedented view into the dynamics of the virus and someday could help researchers devise improved strategies to combat viral infections in plants, animals and even humans. (nsf.gov)
  • We often hear about the biggest animals that would easily tower over humans twice, thrice, and some even ten times. (boredpanda.com)
  • The world's fin dealers congregate at Alibaba.com , a publicly traded Chinese company partly owned by Yahoo that lists about 300 sellers. (orlandosentinel.com)
  • This entry was posted in Marine Affairs & Policy and tagged Alzheimers , BMAA , Dr. Deborah Mash , Dr. Neil Hammerschlag , Lou Gehrig Disease , Miami Brain Endowment Bank , R.J. Dunlap Marine Conservation Program , Shark Fin Soup by RSMAS . (miami.edu)
  • Help Marine Animals when you shop on Amazon! (nmlc.org)
  • The National Marine Life Center is an independent, non-profit 501(c)(3) marine animal hospital and science and education center. (nmlc.org)
  • The National Marine Life Center is building a new Marine Animal Hospital and Discovery Center. (nmlc.org)
  • Each year hundreds of helpless marine animals, all federally protected and most endangered, beach on our shores, alive and in desperate need of medical care. (nmlc.org)
  • The center draws salt water, the very lifeblood of any marine animal facility, directly from Cape Cod Canal through its new life support building. (nmlc.org)
  • With unique insight gained through marine animal care, we learn science lessons from our patients that tell us about the health of the oceans. (nmlc.org)
  • Knowledge treating marine animals has improved human medical treatment for ailments such as middle ear infections and pediatric joint injuries. (nmlc.org)
  • Designed from stem to stern as a model green facility, the National Marine Life Center will meet the medical and rehabilitative needs of stranded marine animals in Cape Cod and the northeast region, while we model through example the key lessons of ocean conservation. (nmlc.org)
  • This sea animal is notorious among marine biologists as a dolphin that has a problem with us. (listverse.com)
  • The latter portion of the fin whale's scientific name, physalus , was once used in reference to all rorquals. (britannica.com)
  • It was not before 1978 that some of the fin whale's organs - its penis, trachea and aortic arch - reached Stralsund through scientific exchange. (meeresmuseum.de)
  • Hong Kong has seized 26 tonnes of smuggled shark fins, sliced from some 38,500 endangered animals, in the largest bust of its kind in the southern Chinese city. (yahoo.com)
  • The sale and consumption of shark fin is not illegal in Hong Kong, but must be licensed. (yahoo.com)
  • Shark's fin soup has long been considered a delicacy in Chinese communities around the world, served for special occasions and for honored guests. (chinadigitaltimes.net)
  • Shark fin soup is a delicacy reserved for the wealthy on special occasions and it has been part of Chinese culture for centuries. (cnn.com)
  • Once served at the banquet tables of Ming emperors, the ancient delicacy of shark-fin soup -- at $18 a bowl -- can be found at restaurants across Florida, including in Orlando. (orlandosentinel.com)
  • One reason is the Asian delicacy Shark Fin Soup, which has resulted in the plunder and pillaging - know as finning - of nearly 100 million of the sharp-toothed sea creatures each year. (sheknows.com)
  • It's easy to spot fin rot because it slowly eats away your bettas fins so that it becomes shorter and uglier. (hubpages.com)
  • when my female Betta approaches his nest he gets aggressive and nips their fins when will he embracei have a male red Betta (3inch in length) and 3 female bettas (1.5 inch) in a tank filled with 10 litres of water and height of about 12cms. (hubpages.com)
  • Vegans and vegetarians will say that killing any animal for food is cruel, while most meat eaters will say that humanely killing animals for food is acceptable. (sheknows.com)
  • We believe that good animal welfare gives better quality meat, that's why this product is prepared using chicken from farms operating to these standards. (tesco.com)
  • In our study, microinjection of morpholino- (MO-) modified antisense oligonucleotides against pax1b induced pectoral fin bud defects. (hindawi.com)