Traditional methods of population assessment used by the fisheries industry cannot be applied to the hagfish. |
|
These data from our studies suggest a seasonal reproductive cycle in the Atlantic hagfish. |
|
Single forms were cloned from dogfish shark, greenland shark, both lamprey species, hagfish, and amphioxus. |
|
It has been suggested the demand for hagfish skin has greatly depleted the hagfish populations. |
|
In addition, there is little known about how the hagfish feed, grow, or sexually mature. |
|
One form is lamprey like, whereas the other is closer to the more primitive hagfish. |
|
Gametogenesis appeared to be unaffected by hypophysectomy suggesting that the hagfish gonad was independent of hypophysial gonadotropic control. |
|
In traditional classifications, the hagfish, lampreys, and extinct armored jawless fish are grouped together in the paraphyletic Class Agnatha. |
|
The crystal structure of hagfish insulin has also been determined and it is virtually superimposable with porcine insulin. |
|
Apparently living at great depths with the hagfish, the prehistoric ratfish was recently discovered off Brazil by scientists. |
|
Little is known about the steroids associated with these structures in hagfish. |
|
Whatever their phylogenetic position, the hagfish are still considered the most primitive vertebrate known, living or extinct. |
|
To date, the question of luteal-like structures in lampreys and hagfish is unresolved. |
|
Litman next plans to look for novel immune genes in jawless vertebrates, such as lamprey and hagfish. |
|
Protecting hagfish populations during potential reproductive periods may allow them to recover from the pressures of a commercial fishery. |
|
Female hagfish produce between 20 and 30 yolky, shelled eggs at a time. |
|
Cyclostome, a collective term for the living members of the superclass Agnatha, the lamprey and the hagfish. |
|
The hagfish, together with lampreys, are living representatives of the jawless vertebrates and are considered to be the most evolutionarily ancient vertebrates. |
|
The hagfish will twist itself into a knot to squeeze or slough off the mucous, so that water can pass through the gill openings for respiration. |
|
They dove time and again to observe lampshells, hagfish and Southern king crab, among the ancient, primitive creatures there. |
|
|
They are represented now only by the lampreys, eel-like forms that are parasites on fish, and the hagfish, also eel-like but feeding on dead or dying animals. |
|
Archinephros, ancestral vertebrate kidney, retained by larvae of hagfish and of some caecilians and occurring in the embryos of higher animals. |
|
To deter predators, hagfish have special pores along the body that secrete copious amounts of slime. |
|
To combat this problem the hagfish has developed an interesting method to get rid of unwanted mucous. |
|
There are between 30 and 35 species of hagfish worldwide, which are all marine. |
|
Articles 9 and 10 shall not apply to catches of salmonids, lampreys or hagfish. |
|
And of the two that remained, only a handful of species still live today, including lampreys and hagfish. |
|
And as I demonstrated when I dropped one into the bucket, a hagfish can exude from its skin a substance so slimy and so plenteous it seems supernatural. |
|
These first vertebrates lacked jaws, like the living hagfish and lampreys. |
|
Hermaphrodites were rarely observed in a study on the Japanese hagfish. |
|
Initially, moving organisms, such as sharks and hagfish, scavenge soft tissue at a rapid rate over a period of months to as long as two years. |
|
Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. |
|
These creatures scavenge for dead and dying fish, which is not appreciated by fishermen who find hagfish feeding on the fish in their net catches. |
|
The olfactory lobes are very large in fish that hunt primarily by smell, such as hagfish, sharks, and catfish. |
|
Fisheries worldwide directly profit from the harvesting of hagfish, such as Myxine garmani and Eptatretus burgeri for leather and food. |
|
If you asked yourself what sort of a person collects and dries out hagfish slime, award yourself 50 points and a Noddy badge. |
|
And his investigation into the sliming properties of the hagfish is more than a match for any I'm A Celebrity trial. |
|
A lot of times, people pick up and leave when they don't catch anything for several minutes, but this is when you're likely to catch hagfish. |
|
The oldest unequivocal chordate remains come from the Lower Cambrian of south China, where small jawless fish similar to present-day lamprey and hagfish occur as part of the Chengjiang Biota. |
|
The hagfish retina should lack bipolar cells. |
|
|
Primitive vertebrate ovaries occur in the hagfish, in which a mesentery-like fold of gonadal tissue stretches nearly the length of the body cavity. |
|
Initially, organisms such as sharks and hagfish scavenge the soft tissues at a rapid rate over a period of months and as long as two years. |
|
Two laterally placed eyes form around outgrowths from the midbrain, except in hagfish, though this may be a secondary loss. |
|
Our Department, the industry, and DFO continued to make progress toward commercial development of species such as ocean quahaugs, marine worms, sea cucumbers, hagfish, rock crab, and Jonah crab. |
|
It comes from the Pacific hagfish, a jawless fish which is also known as the slime eel. |
|
There are almost 28,000 known extant species, of which almost 27,000 are bony fish, with 970 sharks, rays, and chimeras and about 108 hagfish and lampreys. |
|
A Ukrainian teen watching NEPTUNE's online webcams glimpsed the snout of a mysterious creature slurping up a slimy hagfish on the seafloor, at a depth of nearly 900 meters. |
|
Molecular analysis since 1992 has suggested that hagfish are most closely related to lampreys, and so also are vertebrates in a monophyletic sense. |
|
The position of hagfish in the phylum Chordata is not settled. |
|
Initially, moving organisms such as sharks and hagfish, scavenge the soft tissues at a rapid rate over a period of months, and as long as two years. |
|
The vertebrates traditionally include the hagfish, which do not have proper vertebrae due to their loss in evolution, though their closest living relatives, the lampreys, do. |
|
Hagfish live in burrows on the seafloor and locate their food by smelling and feeling as they swim. |
|
Hagfish are the oldest lineage of craniates and thus are considered important to evolutionary studies. |
|
Hagfish coat themselves and any dead fish they find with noxious slime making them inedible to other species. |
|
Hagfish and lampreys have relatively small cerebellae, while the mormyrid cerebellum is massive and apparently involved in their electrical sense. |
|