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Articles 4231 - 4260 of 4307

Full-Text Articles in Aquaculture and Fisheries

Observations On The Life History Of Channel Catfish, Ictalurus Punctatus (Rafinesque) In Utah Lake, Utah, Robert E. Lawler May 1960

Observations On The Life History Of Channel Catfish, Ictalurus Punctatus (Rafinesque) In Utah Lake, Utah, Robert E. Lawler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The channel catfish, Ictalurus punctatus (Rafinesque), was first introduced into Utah Lake in the summer of 1911, and has since been stocked in the lake on numerous occasions. It has only been in the last few years that the channel catfish has become an important game fish in Utah. As the value of the channel catfish, as a game fish, increased, it has become increasingly important to the state to maintain this species for present and future generations. This study was initiated in 1958 and completed in 1960, and was financed by the Utah State Department of Fish and Game. …


Relationship Of Certain Environmental Factors To Benthic Fish Densities In Bear Lake, Idaho-Utah, Thomas J. Hassler May 1960

Relationship Of Certain Environmental Factors To Benthic Fish Densities In Bear Lake, Idaho-Utah, Thomas J. Hassler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The project was initiated in June of 1958 and financed by the National Science Foundation and the Wildlife Management Department of Utah State University.

The broad aspects of the study were to determine if a relationship exists between certain physical and biological factors and benthic fish densities. The project vas divided into two parts: (l) to determine the time and extent of thermal stratification, zooplankton densities, conductivity changes within the lake and conductivity differences between the lake and its tributaries; (2) to determine it a relationship exist between benthic fish densities, temperatures, depths, conductivities and benthic zooplankton densities. The data …


Limnological Studies On Hyrum Reservoir, In Northern Utah, Royal A. Rich May 1960

Limnological Studies On Hyrum Reservoir, In Northern Utah, Royal A. Rich

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With an ever increasing fishing pressure on our natural and artificial lakes every measure possible must be taken to preserve the sport for its many thousands of participants.

Hyrum Reservoir is easily accessible to the fishermen of northern Utah. In recent years the lake has offered little in the way of fishing. It is hoped that the information accumulated in this study will help pave the way to a successful stocking program and that Hyrum Reservoir will be one of the productive fishing areas available to Utah anglers.

The objectives of this investigation were:

  1. To determine the extent of area …


Life History Notes On The Walleye, Stizostedion Vitreum Vitreum (Mitchill) In A Turbid Water, Utah Lake, Utah, Billy B. Arnold May 1960

Life History Notes On The Walleye, Stizostedion Vitreum Vitreum (Mitchill) In A Turbid Water, Utah Lake, Utah, Billy B. Arnold

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Early in 1952, walleye fry were stocked for the first time in Utah Lake. Subsequent plants were made in 1954, 1955 and 1956. Altogether, over two million fry have been stocked.

By January, 1958, it was felt sufficient time had elapsed for the species to establish patterns of growth, reproduction, food habits and consequent relationships to the new environment. Thus, on January 1, 1958, a Federal Aid to Fisheries project, number DJ F-4-R-5, job T, was initiated. This project was entitled "investigations of Yellow Pikeperch and Channel Catfish of Utah Lake, Utah County." Although the closing date was December 31, …


Preliminary Report: Monolayer Behavior Studies, 1959, Bureau Of Reclamation Jan 1960

Preliminary Report: Monolayer Behavior Studies, 1959, Bureau Of Reclamation

Publications (WR)

During the fall of 1959, monolayer behavior studies were made on two lakes in the southwest; Boulder Basin of Lake Mead, Nevada, and Lake Sahuaro near Phoenix, Arizona. These studies were made to evaluate the effect of geographical and climatological conditions on movement and behavior of monolayers. The Lake Sahuaro tests also were used to provide data for design and development of improved methods of application and maintenance of a film on this lake in anticipation of full scale, evaporation-reduction tests to be performed there during the summer of I960. The Lake Mead studies produced the following general points of …


Survey Of Fishing In 1000 Ponds In 1959, Willis King Jan 1960

Survey Of Fishing In 1000 Ponds In 1959, Willis King

United States Fish and Wildlife Service: Publications

The program of stocking farm and ranch ponds with fish produced at the national fish hatcheries was evaluated in January 1960 by a survey of 1,000 ponds. This sample, which was randomly chosen, represents 1/40th of the number of ponds stocked in 1957 by the Bureau of Sport Fisheries and Wildlife with bass, bluegill, redear sunfish and catfishes. A questionnaire, approved by the Bureau of the Budget, was employed in 25 States in connection with personal interviews of pond owners or managers by fishery biologists and hatchery personnel.

Pond owners reported that their principal reasons for building the ponds were …


Progress ’60: 1960 Annual Report Jan 1960

Progress ’60: 1960 Annual Report

Nebraska Game and Parks Commission: Publications

Table of Contents

Commissioners … 2

Fisheries … 3

Game … 8

Parks … 14

Information and Tourism … 18

Federal Aid … 21

Engineering … 26

Law Enforcement … 28

Communications … 29

Boating … 30

Financial statement … 31

Permit sales by county … 35


Synopsis Of Strigeoidea (Trematoda) Of Fishes And Their Life Cycles, Glenn L. Hoffman Jan 1960

Synopsis Of Strigeoidea (Trematoda) Of Fishes And Their Life Cycles, Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

This report is an aid to the identification of the strigeoid metacercaria found in the fishes of the world. It includes It condensed record of the known life cycles of those strigeoids that have fish as their second intermediate host.. The parasites are placed in four metacercarial groups of strigeoids (Tetracotyle, Diplostomulum, Neaseus and Prohemistomulum). rather than grouped in the usual taxonomic fashion. The synopsis is world-wide although key's are given only for the species of Tetracotyle, DipIostomulm, and Neascus of North America. Representatives of the different genera are figured and drawings are included of all available …


Lethal Concentrations And Detoxification Time Of Toxaphene For Goldfish, Gambusia And Rainbow Trout, Gar W. Workman May 1959

Lethal Concentrations And Detoxification Time Of Toxaphene For Goldfish, Gambusia And Rainbow Trout, Gar W. Workman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the past few years the Utah Fish and Game Department, as well as the fish and game departments of other states, has been spending fisheries money for fish eradication on both lakes and streams. The Utah Fish and Game Department recently suggested to the University that research be initiated on the subject of toxaphene as a fish poison. Consequently, a better insight into conditions that exist for a given water type could be developed.


The Biology Of The Utah Chub, Gila Atraria (Girard), Of Scofield Reservoir, Utah, Harold F. Olson May 1959

The Biology Of The Utah Chub, Gila Atraria (Girard), Of Scofield Reservoir, Utah, Harold F. Olson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Utah chub is one of the most important non-game fish in Utah. It has a wide range, and occurs in every drainage in Utah. The Utah chub is not important economically as food fish nor is it of much value commercially. The sportsmen think of this species as trash and do not consider catching or consuming them. However, the Utah chub may be caught on hook and line more readily than many game species. The Utah chub in Scofield Reservoir have been caught by trolling, bait fishing and fly casting and furnish considerable sport when caught with a light …


Notes On Scottsbluff, Nebraska, Tornadoes, 27 June 1955, Robert G. Beebe Mar 1959

Notes On Scottsbluff, Nebraska, Tornadoes, 27 June 1955, Robert G. Beebe

National Oceanographic and Atmospheric Administration: Technical Reports and Related Materials

Some general characteristics of thirteen tornadoes that occurred on the afternoon of June 27, 1955 in Scottsbluff County, Nebraska, are related. Two of these caused widespread attention due to their size and their proximity to the cities of Scottsbluff and Mitchell, Nebraska. These two were photographed extensively by residents near their paths. The experience of two men directly beneath one of the two large tornadoes is related.


Migratory Bird Regulations 1959-60 Jan 1959

Migratory Bird Regulations 1959-60

United States Fish and Wildlife Service: Publications

Migratory birds, which move across State and National borders, are recognized as an international resource requiring conservation on a continental basis. Protection of migratory birds on the North American Continent is provided for by conventions between the United States and Great Britain (for Canada), concluded August 16, 1916 (39 Stat. 1702), and between the United States and the United Mexican States, concluded February 7, 1936 (50 Stat. 1311). Protection in the United States is provided by the Migratory Bird Treaty Act of July 3,1918, as amended (40 Stat. 755; 16 U. S. C. 703). Birds protected by the Migratory Bird …


Bleak Reports Coming From Waterfowl Breeding Grounds, Ross Leffler Jan 1959

Bleak Reports Coming From Waterfowl Breeding Grounds, Ross Leffler

United States Fish and Wildlife Service: Publications

There is no optimism expressed in the reports from the Flyway Biologists and other observers making surveys on the waterfowl breeding grounds in Canada and the United States. The only bright spot is a report from Fairbanks, Alaska, that the Yukon Flats and other breeding areas in that vicinity are well populated with waterfowl. While this is a heartening sign, only in a small degree does it offset the prospects for poor production in the heart of the continental breeding grounds in the Prairie States and Provinces.

As one observer with many years of experience in the prairies has put …


The Waterfowl Councils A Conservation Partnership Jan 1959

The Waterfowl Councils A Conservation Partnership

United States Fish and Wildlife Service: Publications

What is a Waterfowl Council?

It's doubtful if many duck hunters know the answer to that question. Yet these Councils are responsible for the planning of many programs that will influence the kind of duck hunting these same sportsmen will have in the future.

Because the activities of the Waterfowl Councils do mean so much to so many people--not only to duck hunters but to the millions of people who get their fun just watching the birds-this circular has been prepared to tell the Council story. Its purpose is to explain the basic waterfowl problem and the current approach to …


The Natural Reproduction Of The Cutthroat Trout, Salmo Clarki Richardson, In Strawberry Reservoir, Utah, William S. Platts May 1958

The Natural Reproduction Of The Cutthroat Trout, Salmo Clarki Richardson, In Strawberry Reservoir, Utah, William S. Platts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Strawberry Reservoir, Utah is an 8,000 acre lake at the elevation of 7,550 feet; it has a maximum depth of 52 feet and an average depth of 18 feet. The supply of cutthroat trout eggs used to replenish and distribute this trout throughout the state are taken from two spawning traps located on reservoir tributaries. Because it has not proven economical to raise cutthroat to a larger size than newly hatched fry, it is at this stage they are planted. Because of competition, predation, and lack of space the planting back of fry to maintain the fishery and spawning run …


A New Genus Of Monogenetic Trematode (Family Diclidophoridae) From A New Zealand Fish, Harold W. Manter, Gail Walling Jan 1958

A New Genus Of Monogenetic Trematode (Family Diclidophoridae) From A New Zealand Fish, Harold W. Manter, Gail Walling

Harold W. Manter Laboratory of Parasitology: Faculty Publications

These monogeneans were collected by Harold W. Manter in Wellington, New Zealand, in 1951 from the gills of Seriolella brama (Günther), the warehou (Family Nomeidae). A study of the three specimens collected indicates they belong to a new genus of the family Diclidophoridae, subfamily Cyclocotylinae.


Research Notes: Experimental Infection With Strigoid Cercariae, Glenn L. Hoffman Jan 1958

Research Notes: Experimental Infection With Strigoid Cercariae, Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

During the summers of 1947 and 1948 strigeoid cercariae from Carrol Lake, Wisconsin were collected and identified by the late Dr. F. G. Brooks and turned over to the writer for use in the experimental infection of frog tadpoles and various fish. It was hoped to establish or eliminate these animals as the second intermediate host. One of the 8 tested was found infective for fish, and 1 infected tadpoles. These records do not elucidate the life cycles of these worms, but it is hoped that the work may help in the future study of strigeoid cercariae.


The Experimental Histopathology Of The "Tumor" On The Brain Of The Stickleback Caused By Diplostomum Baeri Eucaliae Hoffman And Hundley, 1957 (Trematoda: Strigeoidea)), Glenn L. Hoffman, James B. Hoyme Jan 1958

The Experimental Histopathology Of The "Tumor" On The Brain Of The Stickleback Caused By Diplostomum Baeri Eucaliae Hoffman And Hundley, 1957 (Trematoda: Strigeoidea)), Glenn L. Hoffman, James B. Hoyme

United States Fish and Wildlife Service: Publications

The structure of the "tumor" on the brain of the stickleback fish, Eucalia inconstans (Kirtland) caused by Diplostomum baeri eucaliae, has been briefly reported (Hoffman and Hoyme, 1957; Hoffman and Hundley, 1957) and consists of an outgrowth of the columnar epithelium of the choroid plexus which surrounds the metacercariae at the postero-lateral aspect of the optic lobes. The present report deals with the experimental development of the "tumor."
No record of a comparable structure in fish could be found and the reader is referred to our earlier paper (Hoffman and Hundley, 1957) for further introduction, and materials and methods.


Studies On The Life-Cycle Of Ornithodiplostomum Ptychocheilus (Faust) (Trematoda: Strigeoieda) And The "Self Cure" Of Infected Fish*, Glenn L. Hoffman Jan 1958

Studies On The Life-Cycle Of Ornithodiplostomum Ptychocheilus (Faust) (Trematoda: Strigeoieda) And The "Self Cure" Of Infected Fish*, Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

During the summer of 1956 the following fish of Turtle River (Arvilla), North Dakota were found infected with the Neascus metacercaria of Ornithodiplostomum ptychocheilus (Faust): Northern common shiner (Notropis cornutus frontalis), bigmouth shiner (Notropis d. dorsalis), creek chub (Semotilus a. atromaculatus), fathead (Pimephales p. promelas), and johnny darter (Boleosoma n. nigrum). The cysts were usually very numerous (up to 400 per fish) in the mesenteries of the chub and common shiner; they were also very numerous in the cranial cavity and in the fat bodies behind the eyes of the …


The Use Of Branchiostegal Rays To Determine Age Of Lake Trout Salvelinus Namaycush Walbaum, Ross Vivian Bulkley May 1957

The Use Of Branchiostegal Rays To Determine Age Of Lake Trout Salvelinus Namaycush Walbaum, Ross Vivian Bulkley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Any method used in aging fish must fulfill certain requirements to be satisfactory. If the method is inaccurate, naturally little reliance can be placed upon its use. If considerable study of the method and much practice are required before accurate readings can be obtained, the method will not come into widespread use. The requirements of an aging method, then are that it must be accurate and comparatively easy. The scale method for aging lake trout (Salvelinus namaycush Walbaum) unfortunately does not fulfill these requirements. It has always been difficult to tell the age of lake trout by the examination …


The Life-Cycle Of Diplostomum Baeri Eucaliae N. Subsp. (Trematoda: Strigeida)*, Glenn L. Hoffman, James B. Hundley Jan 1957

The Life-Cycle Of Diplostomum Baeri Eucaliae N. Subsp. (Trematoda: Strigeida)*, Glenn L. Hoffman, James B. Hundley

United States Fish and Wildlife Service: Publications

During the summers of 1953, 1954, and 1955, many brook stickleback, Eucalia inconstans, from the English Coulee, a small stream in Grand Forks, were found infected with an unrecorded species of diplostomulum metacercaria; its life cycle has been reported in abstract (Hoffman, 1955). In 1953, 51 (82%) of the 62 sticklebacks examined were infected, but in 1955 a much smaller number was infected; no exact records were kept in 1954 and 1955. The number of diplostomula per fish ranged from 0 to 335. During the summer of 1956 lightly infected stickleback were also found in Turtle River, Kelly's Slough, …


Gyrodactylus Eucaliae N. Sp. (Trematoda: Monogenea) From The Brook Stickleback, Eucalia Inconstans*, Glenn L. Hoffman, Francis M. Ikezaki Jan 1957

Gyrodactylus Eucaliae N. Sp. (Trematoda: Monogenea) From The Brook Stickleback, Eucalia Inconstans*, Glenn L. Hoffman, Francis M. Ikezaki

United States Fish and Wildlife Service: Publications

A new species of Gyrodactylus was observed on the skin, gills, and fins of the brook stickleback from the English Coulee, Grand Forks, North Dakota during the summers of 1953-1955. Host-specificity is usually striking in the monogenetic trematodes and since this parasite was not observed on any other species of fish from this body of water or the nearby Turtle River, it was studied in detail and is here described as a new species, G. eucaliae.


An Evaluation Of Methods Of Concentrating And Counting The Phytoplankton Of Bear Lake, Utah-Idaho, William J. Clark May 1956

An Evaluation Of Methods Of Concentrating And Counting The Phytoplankton Of Bear Lake, Utah-Idaho, William J. Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The phytoplankton, or plant plankton, live in the open water throughout their life cycle and obtain the necessary nutrients from the water. They are important contributors to the total plant production of lakes and ponds.


Nebraska Record Fish (As Of June 1, 1956) Jan 1956

Nebraska Record Fish (As Of June 1, 1956)

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

A listing of the largest fish caught in Nebraska (as of June 1, 1956) for: largemouth bass, smallmouth bass, white bass, bluegill, buffalo, bullhead, blue catfish, brook trout, channel catfish, yellow catfish, crappie, fresh water drum, northern pike, walleye pike, perch, rainbow trout, and sauger. Includes the name of the fisherman or fisherwoman, the location of the catch, the year of the catch, the weight of the fish, and a few other details.


Migratory Bird Regulations 1956-57 Jan 1956

Migratory Bird Regulations 1956-57

United States Fish and Wildlife Service: Publications

Migratory birds, which move across State and National borders, are recognized as an international resource requiring conservation on a continental basis. Protection of migratory birds on the North American Continent is provided for by conventions between the United States and Great Britain (for Canada), concluded August 16, 1916 (39 Stat. 1702), and between the United States and the United Mexican States, concluded February 7, 1936 (50 Stat. 1311). Protection in the United States is provided by the Migratory Bird Treaty Act of July 3,1918, as amended (40 Stat. 755; 16 U. S. C. 703).

Birds protected by the Migratory Bird …


Summary Report Of The 1956 Midwinter Waterfowl Survey In The Central Flyway, C. S. Williams Jan 1956

Summary Report Of The 1956 Midwinter Waterfowl Survey In The Central Flyway, C. S. Williams

United States Fish and Wildlife Service: Publications

This report summarizes the information obtained by the 1956 midwinter waterfowl survey on the size and distribution of waterfowl populations wintering in the Central Flyway States and Eastern Mexico. The information has been compiled solely for the use of administrators and waterfowl research men who are engaged in the management of the waterfowl resource.

The U. S. Fish and Wildlife Service, the ten States of the Central Flyway Council, and the Forestry and Wildlife Department of Mexico cooperated in conducting the survey which began on January 9, and for the most was completed within several days thereafter. Thus, with the …


The Life Cycle Of Crassiphiala Bulboglossa (Trematoda: Strgeida): Development Of The Metacercaria And Cyst, And Effect On The Fish Hosts, Glenn L. Hoffman Jan 1956

The Life Cycle Of Crassiphiala Bulboglossa (Trematoda: Strgeida): Development Of The Metacercaria And Cyst, And Effect On The Fish Hosts, Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

The adult of Crassiphiala bulboglossa was described by Van Haitsma (1925) from the kingfisher, Ceryle alcycon. It can be differentiated from Uvulifer ambloplitis (Hughes, 1927), apparently its closest relative in North America, by the presence of a large bulbous holdfast occupying most of a cup-shaped forebody, and the absence of a ventral sucker. In U. ambloplitis the holdfast is small, the forebody is not cupped, and a ventral sucker is present. These species can be readily identified with the keys given by Dubois (1953).


Factors In The Development And Restoration Of Waterfowl Habitat At Ogden Bay Refuge Weber County, Utah, Noland F. Nelson May 1955

Factors In The Development And Restoration Of Waterfowl Habitat At Ogden Bay Refuge Weber County, Utah, Noland F. Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Millions of acres of marshland have been destroyed by the industrial and agricultural development of this continent. Drainage, water diversion, land leveling, and some other factors which destroyed waterfowl habitat were in most instances essential steps in man's progress; but water pollution, unwise drainage, and other soil and water abuses were tragic and unessential steps in our history of land exploitation that have destroyed vast acreages of habitat. The future of waterfowl on this continent hinges upon the success of restoration or new marsh development to replace this destroyed habitat.


Research Notes: Notes On The Life Cycle Of Fibricola Cratera (Trematoda: Strigeida), Glenn L. Hoffman Jan 1955

Research Notes: Notes On The Life Cycle Of Fibricola Cratera (Trematoda: Strigeida), Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

The life cycle of Fibricola cratera (Barker and Noll, 1915) Dubois, 1932 was reported in 1940 (Cuckler, A. C., Journal of Parasitology 26 (6-Suppl.): 32-33). The writer repeated the life cycle at the University of Iowa in 1948-49 and wishes to add a few observations. Apparently the life cycle of Fibricola texensis Chandler, 1942 (Chandler, A. C., Transactions of the American Microscopical Society 61: 156-167, 1942) is very nearly identical to that of F. cratera. The genus has been reviewed by C. P. Read (Transactions of the American Microscopical Society 67: 165-168, 1948).


Neascus Nolfi N. Sp. (Trematoda: Strigeida) From Cyprinid Minnows With Notes On The Artificial Digest Recovery Of Helminths, Glenn L. Hoffman Jan 1955

Neascus Nolfi N. Sp. (Trematoda: Strigeida) From Cyprinid Minnows With Notes On The Artificial Digest Recovery Of Helminths, Glenn L. Hoffman

United States Fish and Wildlife Service: Publications

During an examination of fish from Turtle River, Arvilta, North Dakota, a new Neascus (larval strigeid) was recovered from the musculature and integument of the northern creek chub, Semotilus a. atromaculatus (Mitchell) and the northern common shiner, Notropis cornutus frontalis (Agassiz). This new species is named in honor of Dr. L. O. NoIf, University of Iowa.