...Douglas S. Fudge; Joshua Lee; Kennedy Guillen; Cassandra M. Donatelli; Andrew Lowe; Luke Arnold; Keolani Kahale-Lua; Christian Quinteros; Peter Ly; Larissa Atkins; Noah Bressman; Charlene L. McCord ABSTRACT Myxine limosa is a burrowing species of hagfish that occurs in the western North Atlantic...

...Gaurav Jain; Marie Starksen; Kashika Singh; Christopher Hoang; Paul Yancey; Charlene McCord; Douglas S. Fudge ABSTRACT Hagfish defend themselves from fish predators by producing large volumes of gill-clogging slime when they are attacked. The slime consists of seawater and two major components...

...Chris N. Glover; Alyssa M. Weinrauch ABSTRACT The hagfishes provide valuable insight into the physiology of feeding, digestion and nutrient absorption by virtue of unusual and unique features of their biology. For example, members of this group undergo long periods of fasting, and are the only...

...Mark A. Bernards, Jr; Isdin Oke; Andreas Heyland; Douglas S. Fudge Hagfishes are known for their ability to rapidly produce vast quantities of slime when provoked. The slime is formed via the interaction between seawater and two components released by the slime glands: mucin vesicles from gland...

...Jeanette Lim; Douglas S. Fudge; Nimrod Levy; John M. Gosline SUMMARY Hagfish are able to produce substantial amounts of slime when harassed, but the precise ecological function of the slime is unclear. One possibility is that the slime acts as a defence against gill-breathing predators, whose gills...

...Douglas S. Fudge; Nimrod Levy; Scott Chiu; John M. Gosline SUMMARY Hagfish slime consists of mucins and protein threads that are released from slime glands and mix with seawater to produce an ephemeral material with intriguing physical properties. We recently characterized the mechanics...

...Gabriele Müller; Angela Fago; Roy E. Weber SUMMARY Hagfish hemoglobin (Hb) is considered to represent a transition stage between invertebrate and vertebrate hemoglobins. The Hb system of Myxine glutinosa consists of three monomeric hemoglobins, which upon deoxygenation associate to form primarily...

...John H. Long, Jr; Magdalena Koob-Emunds; Benjamin Sinwell; Thomas J. Koob SUMMARY To determine the possible locomotor functions of the hagfish notochord, we measured its flexural stiffness EI (N m -2 ) and flexural damping C (kg m 3 s -1 ), under in vitro conditions that mimicked the body curvature...

...Isao Inoue; Izuo Tsutsui; Quentin Bone SUMMARY Hagfishes are regarded as the most primitive living craniates. Excitation—contraction (E—C) coupling mechanisms were studied in skeletal and caudal heart muscle fibres of the hagfish Eptatretus burgeri . In white (fast) skeletal muscle fibres from...

...Frank B. Jensen SUMMARY Autoxidation of oxyhaemoglobin (oxyHb) to methaemoglobin was measured at different temperatures in haemoglobin solutions from Atlantic hagfish, river lamprey, common carp, yellowfin tuna and pig. The aims were to evaluate the impact of the absent distal histidine in hagfish...

...Thomas Peters; Robert E. Forster; Gerolf Gros ABSTRACT The bicarbonate permeability of the plasma membrane of intact hagfish ( Myxine glutinosa ) red blood cells and the intracellular carbonic anhydrase activity of these cells were determined by applying the 18 O exchange reaction using a special...

...Frank B. Jensen ABSTRACT Agnathans, comprising lamprey and hagfish species, have been reported to be practically devoid of HCO 3 − /Cl − exchange across the red blood cell membrane. This suggests that the capacity of their haemoglobin (Hb) to remove H + is essential for obtaining a high CO 2...

...J. A. Riegel ABSTRACT Adrenaline and noradrenaline increased the perfusion pressure ( P perf ) and single glomerulus filtration rate (SGFR) of perfused hagfish glomeruli. Small amounts (0.1 % or 0.5 %) of bovine serum albumin (BSA) in perfusion fluids containing Ficoll 70 did not diminish the loss...

...Nicholas J. Bernier; Steve F. Perry ABSTRACT An in situ saline-perfused systemic heart/posterior cardinal vein preparation of the Atlantic hagfish ( Myxine glutinosa ) was used to assess (1) the ability of the chromaffin tissue to release catecholamines in response to adrenocorticotropic hormone...

... from the SR. This apparent difference in myocardial excitation–contraction (E–C) coupling was investigated further by determining DHPR and RyR densities in ventricular homogenate preparations from rat, trout, dogfish and hagfish. DHPR B max values (means ± S.E.M.) were highest in rat (0.30±0.01 pmol mg...

...Marianne Johnsson; Michael Axelsson ABSTRACT The effects of preload and afterload on the performance of the systemic heart of the hagfish Myxine glutinosa were investigated before and during sotalol treatment using an in situ perfusion technique. Elevation of input pressure (preload) increased flow...

... . Inflation experiments were also performed on the aortae of two species of primitive vertebrates, the sea lamprey Petromyzon marinus and the Atlantic hagfish Myxine glutinosa . The inflation experiments demonstrated similar overall biomechanical properties in each case, despite the existence of differences...

...Tes Toop; John A. Donald; David H. Evans ABSTRACT The character of natriuretic peptide receptors (NPRs) in the kidney and aortae of the Atlantic hagfish Myxine glutinosa was determined and compared with that of NPRs in hagfish gills. The relationship of hagfish kidney and aortic NPRs with NPRs from...

...Tes Toop; John A. Donald; David H. Evans ABSTRACT Specific binding of iodinated natriuretic peptides 125 I-ANP and 125 I-CNP was examined in the gill of the Atlantic hagfish Myxine glutinosa by tissue section autoradiography, saturation and competition analysis of binding to membrane preparations...

...L. Sundin; M. Axelsson; S. Nilsson; W. Davison; M. E. Forster ABSTRACT Of the extant vertebrate animals, the hagfishes are generally considered to be the group which diverged first from the ancestral vertebrate lineage, although molecular sequence analysis has recently suggested that they form...