Activity and post-prandial regulation of digestive enzyme activity along the Pacific hagfish (Eptatretus stoutii) alimentary canal
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Bactericidal antibody response in the Pacific hagfish, Eptatretus stoutii.
The hagfish, Eptatretus stoutii, has been shown to synthesize bactericidal antibodies after injections of gram-negative organisms. These bactericidins could be detected as early as 2 days after the primary injection. Secondary responses were accelerated, although titers were not significantly higher than those reached in the primary response. The bactericidins of hagfish were found to react wit...
متن کاملCardiac responses to anoxia in the Pacific hagfish, Eptatretus stoutii.
In the absence of any previous study of the cardiac status of hagfishes during prolonged anoxia and because of their propensity for oxygen-depleted environments, the present study tested the hypothesis that the Pacific hagfish Eptatretus stoutii maintains cardiac performance during prolonged anoxia. Heart rate was halved from the routine value of 10.4±1.3 beats min⁻¹ by the sixth hour of an ano...
متن کاملHagfish (Eptatretus stouti) erythrocytes show minimal chloride transport activity.
Capnophorin (Band 3) is the major red cell transport protein, present in human erythrocyte membranes at 1X10 copies per cell. Under physiological conditions, the transporter is capable of moving 50 mol (C1~/HCO3~) 1 cells" 1 min" (Knauf, 1979), this high rate being necessary for carriage of CO2 in normal respiration (Wieth et al. 1982). In the present paper we demonstrate that, in contrast to t...
متن کاملPacific Hagfish, Eptatretus stoutii, Spotted Ratfish, Hydrolagus colliei, and Scavenger Activity on Tethered Carrion in Subtidal Benthic Communities off Western Vancouver Island
Vertebrate carcasses provide an episodic but highly important food source for benthic organisms, particularly at depths beyond the zones of primary productivity (Lalli and Parsons 2001). Such carcasses have recently become of interest due to increasing discards in fisheries as this may shift benthic community structure (Collins et al. 1999). Species such as ratfish and benthic sharks as well as...
متن کاملPhylogeny and effects of anoxia on hyperpolarization-activated cyclic nucleotide-gated channel gene expression in the heart of a primitive chordate, the Pacific hagfish (Eptatretus stoutii).
The aneural heart of the Pacific hagfish, Eptatretus stoutii, varies heart rate fourfold during recovery from anoxia. Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels, which play an important role in establishing the pacemaker rate of vertebrate hearts, were postulated to be present in this ancestral vertebrate heart, and it was also theorized that changes in hagfish heart rat...
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ژورنال
عنوان ژورنال: PLOS ONE
سال: 2019
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0215027