Proceedings of Southeastern Fish and Wildlife Conference
Prior to 2013, SEAFWA published the Proceedings of annual conferences. In 2014, SEAFWA began publishing the peer-reviewed Journal of the Southeastern Association of Fish and Wildlife Agencies.
2451 - 2500 of 4522 articles | 50 per page | page 50
| Article | Year |
|---|---|
Factors Affecting Hematological Values Of White-Tailed Deer In South Texas Blood samples from white-tailed deer (Odocoileus virginianus texanus) were taken in three locations in south Texas to establish metabolic profiles and nutritional status and to determine the correlations of body condition, location, season, sex, age, reproductive status, stress and hemolysis with hematological values for this species. Lytle H. Blankenship, Larry W. Varner
Pages 107-115 |
1977 |
Evaluating Physiological Condition Of Bobwhite Quail A total of 146 bobwhite quail (Colinus virginianus) was collected during the winters of 1972-73 and 1973-74, from 2 study areas in Tennessee and 1 area in Florida. Body weight, levels of body fat, burden of gastrointestinal helminths, and adrenal weights were determined. Quail from the Tennessee areas were significantly (P < 0.05) heavier than those from the Florida area. Fat was extracted using a Soxhlet ether extraction apparatus, and was expressed as a percentage of oven-dry body weight. Joseph M. Dabney, Ralph W. Dimmick
Pages 116-122 |
1977 |
Since the early 1960's, over 4,500 wild hogs (Sus scrota) have been relocated through Florida Game and Fresh Water Fish Commission trapping operations. The trap now used by the Florida Commission is described. It is basically an open-top, sectional trap consisting of 4 separable panels with a multiple-capture root-door in one panel. Robert C. Belden, William B. Frankenberger
Pages 123-125 |
1977 |
Diurnal Range And Movements Of Young White-Tailed Deer Fawns In Southwestern Oklahoma Average diurnal range sizes for 10 white-tailed deer (Odocoileus virginianus) fawns indicate an increase from 3.3 ha at 1 week of age to 52.0 ha at 12 weeks of age. Distance between successive die! locations increased with age, but total daytime movements did not increase with age, therefore increasing diurnal range size appears to result from increasing nocturnal movements as fawns grow older. Gerald W. Garner, John A. Morrison
Pages 126-133 |
1977 |
Winter Bird Populations In Pine And Pine-Hardwood Forest Stands In East Texas When birds were censused in pine and pine-hardwood stands of different heights to determine the effects of stand structure on winter bird populations, the shortest stands generally had more birds than taller stands. The pine sapling stand was lower than all other stands in bird population characteristics. Pine-hardwood stands were generally similar to pine stands in number of species, but higher in species diversity, and lower in bird density than pine stands of comparable height. James G. Dickson, Charles A. Segelquist Pages 134-137 |
1977 |
A Reevaluation Of The History Of Pronghorn Abundance In West Texas Historical documents concerning occurrence, distribution and abundance of pronghorn (Antilocapra americana) in West Texas are full of information pertinent to wildlife managers. These sources indicate the decline of pronghorn was directly caused by human settlement of antelope range. These data show that pre-settlement antelope populations in the Panhandle and Permian Basin were greater than those in the TransPecos District. Tim J. Leftwich, C. David Simpson
Pages 138-146 |
1977 |
A Self-Service System For Estimating Hunter Usage And Harvest On Management Areas In Mississippi' A self-service daily recreational permit was developed and tested on 6 Wildlife Management Areas in Mississippi during the 1976-77 season. The permit system provides data on hunter usage and harvest by species and day of the season, the effective area served by management units, and an indication of economic importance of recreational opportunities. The utility of the system is illustrated with data for deer hunting on the Issaquena Wildlife Management Area. These data should aid greatly in the formulation of management decisions and allocation of agency resources. David C. Guynn, Jr., Harry A. Jacobson, Edward J. Hackett, Edsel Cliburn
Pages 147-150 |
1977 |
Population Status, Hab.Itat And Movement Of Elk In The Guadalupe Mountains National Park, Texas' Introduced Rocky Mountain elk (Ceruus canadensis nelsom) were studied in the Guadalupe Mountain National Park in the summer of 1976. This population was stable at about 100 animals, with sex and age ratios closest to those of the Tule elk. Animals utilized all 4 major habitats in the higher elevations of the Park. Movement between 3 elk aggregations were related to the availability of surface water and the carrying capacity of the area. Sixty-two % of the mortalities were closely associated with temporary pools which may substantiate the importance of water in limiting elk numbers. John D. Moody, C. David Simpson
Pages 151-158 |
1977 |
Seasonal Feeding Habits Of White-Tailed Deer In Southern Maryland Food habits of white·tailed deer (Odocoileus virginianus) were studied on a 526·ha mixed forest-grassland site at Blossom Point, on the coastal plain of Maryland. The rumen contents of 2 deer shot per month for a year and a winter browse survey were used to define seasonal variations in plant species utilization. Mushrooms and the fruits of dwarf sumac (Rhus copallina) and oaks (Quercus spp.) were utilized in the fall. In winter, a large portion of the diet was Virginia pine (Pinus virginiana), honeysuckle (Lonicera japonica), and rushes.
Pages 159-166 |
1977 |
White-tailed deer (Odocoileus virginianus) were collected from swamp and upland areas on the Savannah River Plant in South Carolina; the genetic variability of females was 9.8 and 8.5%, respectively, for the 2 areas. Reproductive rates (92-93 fawns/ 100 females) were essentially the same in the 2 areas. Deer in both populations, age> 2 yr, bred earlier and showed less variance in conception dates than younger deer, and swamp deer bred earlier than upland deer. In the swamp. Paul E Johns, Ramone Baccus, Michael M. Manlove, John E. Pinder, lll, Michael H. Smith
Pages 167-172 |
1977 |
Prenatal Selection In White-Tailed Deer White-tailed deer (Odocoileus virginianus) (N = 1341) were collected from 7 locations in Georgia and South Carolina. Sorbitol dehydrogenase (SDH) activity was analyzed using starch-gel electrophoresis. Four types of prenatal selection, Female Gametic Selection, Random Mating, Male Reproductive Selection and Female Sexual Selection, were analyzed for this locus using genotype frequency data including mothers and offspring. Spatial and temporal heterog;eneity were analyzed for the Savannah River Plant (SRP) herd. Ramone Baccus, Hillburn O. Hillstead, Paul E. Johns, Michael M. Manlove, R. Larry Marchinton, Michael H. Smith
Pages 173-179 |
1977 |
Lead And Mercury In Lesser Snow Geese Wintering In Louisiana Wintering Lesser Snow Geese (Chen caerulescens) were analyzed for lead and mercury residues and lead shot ingestion. Lead shot ingestion paralleled assimilation of lead residues. Snow geese collected in rice-growing areas had significantly (P < 0.01) more lead residues than marsh area geese. This was attributed to different soil finnness, feeding habits, and hunting practices in the 2 areas. Recent deposits of lead apparently played a major role in lead shot ingestion because lead residues and shot ingestion were greatest during the hunting season.
Pages 180-187 |
1977 |
The Effects Of Prescribed Burning On Browse, Forbs And Mast In A Texas Live Oak Savannah An isolated area of approximately 2,025 ha of live oak (Quercus virginiana) savannah was experimentally burned during a 2 year study on the Texas Coastal Plain. Two fall burns (October 1974 and 1975) and a spring burn (March 1975) were conducted, one on each of 3 separate areas of approximately equal size. Increased vegetative pro· duction on fall-burned areas was primarily due to a positive response of forbs. Grass production was increased only on the spring-burned area druing the second year postburn. Pages 188-198 |
1977 |
On The Relationship Of Animals Marked To Cost And Accuracy Of Lincoln Estimates The relationship between the number of individuals marked to cost and accuracy of Lincoln Index estimates for a wild population of Key deer (Odocoileus vir· ginianus clavium) of known size was examined. Data indicated that when 50% of the population was marked. there was a greater chance for an accurate estimate; also the cost to trap and mark deer was lowest. Nova J. Silvy, James W. Hardin, W. D. Klimstra
Pages 199-203 |
1977 |
Perception And Use Of Wildlife By North Central Florida People Results of over 250 interviews and 600 mail questionnaires indicate that over 40'10 of north central Florida adults are hunters. This is a significantly larger proportion than buy licenses. There were no significant socioeconomic or demographic differences between hunters, nonhunters and antihunters except that males dominated the hunter group. Hunters appear to be more knowledgeable about wildlife than either the nonhunters or antihunters. Over one-half of present antihunters hunted in the past. Maureen H. McDonough, Larry D. Harris
Pages 204-211 |
1977 |
The Edge Effect On A Forest Bird Community In North Florida Literature addressing the concept of edge effect on wildlife species, as defined by Leopold (1933), is scanty, contradictory, and inconclusive. To investigate the presence of an edge effect on a breeding bird community in north Florida, 2 types of edge, cypress/ clearcut and cypress/planted pine, were studied. Within the 20 m wide edges, the number of breeding bird species and individuals of a species were no greater than in respective bordering habitats for both edge types studied.
Pages 212-215 |
1977 |
Wood Duck Brood Mobility And Utilization Of Beaver Pond Habitats During 1975·1976, 9 wood duck (Aix sponsa) hens with broods were tracked via radio telemetry on beaver (Castor canadensis) pond habitats in the piedmont region of South Carolina. The mobility of all broods was greatest during the first week of rearing, and decreased thereafter. The size of the area utilized was also greatest during week I and with the exception of 2 broods, decreased in subsequent weeks. Cumulative home range size stabilized for 3 broods during the third and fourth week, whereas for others, it increased throughout the rearing period. Pages 216-225 |
1977 |
Winter Foraging Behavior And Aggression Of Diving Ducks In South Carolina The diving times, diving distances, foraging rates, intraspecific and interspecific interactions between canvasbacks (Aythya valisineria), ring-necked ducks (A. co-Uaris) , lesser scaup (A. affinis) and redheads (A. americana) were studied on coastal winter habitats in South Carolina. Diving times, distances and foraging rates varied between habitats of different water depths and between species, but with few exceptions not between sexes. Canvasbacks were the dominant birds and actively defended foraging sites against other birds, particularly ringnecks. William C. Alexander, Jay D. Hair Pages 226-232 |
1977 |
Computer Assisted Techniques In Wildlife Resource Planning A computer technique (IMGRID) is available that produoes quantitative interpretable maps for land management planning. Information from a variety of natural resource documents and field surveys is restructured into a computer compatible format. The computer is used to manipulate data and print the results and their geographical location on computer-generated maps. These maps are useful in a planning process that attempts to match resource management objectives with land capability.
Pages 233-238 |
1977 |
Cumulative monthly browsing by white-tailed deer (Odocoileus virginianus) on unprotected apical leaders of oak (Quercus spp.) and sweetgum (Liquidambar styraciflua) seedlings in plantations in Southwest Alabama exceeded 100% per year. Growth of unprotected seedlings of all species was significantly less (P < .01) than mean growth attained in seedlings subjected to 6 protective treatments with polypropylene mesh tubing. Mortality in unprotected sweegum seedlings was greated than in protected seedlings (P < .05). Mortality of oak was unaffected by protection. Douglas N. Lasher, Edward P. Hill
Pages 239-245 |
1977 |
Winter Food Habits Of River Otters From Alabama And Georgia Food habits of river otters (Lutra canadensis) in Alabama and Georgia were studied using 315 digestive tracts from otters taken by trappers during the 1973-74 through 1976-77 trapping seasons. Additionally, 12 scats were collected during and immediately following the 1975-76 trapping season. Fish occurred in 83.2% of the digestive tracts and in 91.7% of the scats. Virayuth Lauhachinda, Edward P. Hill Pages 246-253 |
1977 |
A Collar For Attaching Radio Transmitter To Nutria Several collar materials (nylon webbing, nylon-covered rubber tubing, nylon webbing lined with nutria fur, boltaron hard plastic, latex tubing, and a nylon harness) and 2 transmitter weights (60 and 120 g) were comparatively tested for potential use as radio transmitter units for nutria (Myocastor coypus). Most collar materials caused dermatitis, abrasions, or lesion around the neck and the animals continuously worked their way out of the nylon harness. Paul D. Coreil, H. Randolph Perry, Jr.
Pages 254-258 |
1977 |
The Effects Of Channelization On Furbearers And Furbearer Habitat Biological data were collected over a 3 year period (1974-1977) from an old channelized segment (55 years), an unchannelized segment and a newly channelized segment (4 years) of the Luxapalila River in Mississippi and Alabama. This study revealed that furbeal'er habitat in the channelized segments has not recovered to the level exhibited in the unchannelized segment. Indices of furbearer abundance were obtained by night lighting and sign counting. Pages 259-265 |
1977 |
Spring Drawdown As A Waterfowl Management Practice In A Floating Fresh Marsh Spring drawdown was evaluated as a waterfowl management practice in a floating fresh marsh in southcentral Louisiana. Water depths were fluctuated in a shallow marsh impoundment for the study. The impoundment produced more waterfowl food plants than the control area and less water hyacinth (Eichhornia crassipes) , a pest plant in the area. There was a direct relationship between the vegetative coverage and composition of the impounded area and the species of seeds present in the top 5 em of soil within the impounded area. David F. Carney, Robert H. Chabeck
Pages 266-271 |
1977 |
The Potential Of Christmas Bird Counts For Monitoring Presence Of Exotic Bird Species The 1975 Christmas Bird Count was divided into 10 blocks, each comprising 100 observation units, encompassing the continental United States and Alaska. A random sample of 10 observation units was drawn from each block, assuring an even distribution over the continental United States and Alaska. Nine major metropolitan areas which were not drawn in the random sample were also studied. Each unit in the sample was examined for each of the years 1956, 1966, 1973, 1974 and 1975. The occurrence and number of each was recorded for all sample units for all years. Patrick F. Scanlon, Timothy G. O'Brien, Alan R. Tipton Pages 272-275 |
1977 |
Status Of The Red-Cockaded Woodpecker In Oklahoma The red·cockaded woodpecker (Picoides borealis) presumably was fairly com· mon historically in the pinelands of southeastern Oklahoma. The species requires oldgrowth timber for nests and roosts, and in the past century their populations have declined due to logging operations and clearing of forestland. Remnant populations of red· cockadeds were located in the McCurtain County Wilderness Area, and on Weyerhaeuser Company lands in Pushmataha County and may still occur in Beavers Bend State Park, McCurtain County.
Pages 276-282 |
1977 |
Problems In Capturing Wild Turkeys With Trichloroethanol In 1976-7721 attempts were made to capture wild turkeys (Meleagris gallopavo) in Michigan and North Carolina with whole corn mixed with trichloroethanol. Many attempts failed and mortality of birds captured was unacceptably high. Trichloroethanol was not recommended for use in capturing wild turkeys. R. Wayne Bailey, robert V. Doepker
Pages 283-284 |
1977 |
Dispersal And Survival Of Translocated Raccoons In Kentucky A tagging and telemetry study of translocated raccoons (Procyon lotor) was conducted during 1975, 1976 and 1977 in Kentucky. In areas of good cooperation from hunters, the reported tag return rate was 19.1% for Kentucky raccoons, 5.5% for Virginia raccoons and 1.7% for Florida raccoons. Mean dispersal distances for tagged Florida, Virginia and Kentucky raccoons was 25.7 km, 7.4 kam and 6.4 km, respectively. Twelve radiotagged Florida raccoons were monitored an average of 65 days.
Pages 285-294 |
1977 |
Ecological observations of gallinules on Lacassine National Wildlife Refuge from 1 April 1975 through 28 February 1976 indicate common gallinules (Gallinula chloropus) arrive earlier and begin nesting before purple gallinules (Porphyrula martinica). Eleven nests of common gallinules, characteristically positioned low in the vegetation and con· structed of bulltongue (Saggitaria lanci/olia), contained an average of 8.1 eggs. Gary R. Bell, Carroll L. Cordes
Pages 295-299 |
1977 |
A Practical Application Of Satellite Imagery To Wildlife Habitat Evaluation Wildlife scientists have been challenged for many years with the need to de· velop cost effective t.echniques for evaluating wildlife habitat. This study sought to develop such a technique utilizing LANDSAT digital imagery. The criterion on which the analysis system was based was vegetative cover diversity (VCD). In order to assess the applicability of the results of the VCD index as a measure of habitat productivity, ground·generated veg.etative and faunal diversity data were collected and compared to the VCD index. Comparisons were made for 19 plots of 65 ha each. Jerry J. Brabander, John S. Carclay
Pages 300-306 |
1977 |
Wood Duck Roost Utilization Of Northeastern North Carolina Swamps A total of 112 standardized counts of roosting ducks were made at 4 roosts within 2 typical northeastern North Carolina swamps from Sepember-March, 1972-73 and 1973-74. Zero to 60 ducks were observed per count with an overall average of 7.5. Approximately 97% of all ducks observed were wood ducks (Aix sponsa). No differences in numbers of roosting ducks were detected between years or swamps in spite of major watershed differences. However roost site differences within a swamp and several year interactions were important. Pages 307-311 |
1977 |
Initial Fish Population Changes Following Impoundment Of West Point Reservoir, Alabama-Georgia The species composition and relative abundance of fishes in West Point Reservoir, a main stem Chattahoochee River reservoir, changed after impoundment in 1975. Strong year classes of gizzard shad, threadfin shad, largemouth bass, black crappie, bluegill, brown bullhead, carp, bowfin, and many sunfishes were produced in 1975. Sixteen species disappeared from the present reservoir region; 11 were not collected after impoundment, and 5 others disappeared during the first year. Tom J. Timmons, W. L. Shelton, W. D. Davies
Pages 312-317 |
1977 |
Largemouth bass (Micropterus salmoides) fail to spawn in association with dense populations of sunfish (Lepomis sp.). Previous studies have demonstrated that suppression is behavioral in nature and linked to interspecific competition for space within spawning areas. In 1976 a series of ponds were stocked with 3 pairs of bass and densities of sunfish from 0-458 kgJha to determine the density necessary to effect suppression. Results were inconclusive with spawning occurring in all ponds but only late in the season in ponds stocked at 250 kgJha or above. Stephen Lee Smith, Joseph E. Crumpton
Pages 318-321 |
1977 |
A Technique For Controlling Weeds In Striped Bass Rearing Ponds Simazine (2-chloro·4, 6-bis (ethylamino)-s - triazine) applied at a rate of 11.2 kg/ha as a preflooding treatment of striped bass (Morone saxatilisWalbaum) rearing ponds effectively controlled aquatic weed growth for periods of up to 172 days. In untreated ponds, weed species were dominant in 9 of 16 replications (56%). Where simazine at a rate of 11.2-14.0 kg/ha was applied to the pond bottom just before flooding, only 3 of 17 replicates (18%) supported nuisance aquatic plant species.
Pages 322-328 |
1977 |
Masoten (Dylox) As A Control For Clam Shrimp In Hatchery Production Ponds Information relative to control of problematical clam shrimp (EubranchiopodaConchostraca) with Masoten (Dylox) was accumulated over a 10. yr period at several Southwestern hatcheries. Laboratory and field studies showed that control could be achieved with single applications of Masoten as low as 0.01 mgl (active ingredient). No deleterious effects on fry, fingerlings, or adult fish of several species were noted. Decomposition of the chemical, as well as effects on plankton and bottom fauna, are discussed. Joseph P. McCraren, Jack L. Millard, Arnold M. Woolven
Pages 329-331 |
1977 |
The Effects Of Heated Water On Warmwater Fish In Earthen Raceways Two-year studies were conducted in 3 earthen raceways (160 m x 6 m x 2 m). One raceway was maintained at ambient water temperature, I had a heated floating plume over 60% of the surface, and 1 was maintained at near heated water discharge temperature. Average water temperatures ranging up to 36.7 C were not lethal for any fish species tested. C. J. Turner, J. M. Lawrence, D. R. Bayne Pages 332-342 |
1977 |
Evaluation Of An Air-Bubble Curtain To Reduce Impingement At An Electric Generating Station A biological testing program was conducted during 1974·75 to determine the efficiency of an air·bubble curtain in reducing fish impingement at Arkansas Nuclear·One Unit I, on Dardanelle Reservoir, AR. Air curtain operation did not effectively deter fish from entering the intake canal or substantially reduce impingement. Seasonal varia· tions in species composition and length·frequency distribution of impinged fish were independent of air curtain operation. There was a significant inverse correlation between water temperature and impingement levels during fall 1974 and spring 1975. Paul J. Zweiacker, James R. Gaw, Edward Green, charles Adams
Pages 343-356 |
1977 |
Salinity Stress And Swimming Performance Of Spotted Seatrout Specific swimming speeds (L sec-1 ) of spotted seatrout (Cynoscion nebulosus) were linearly related (S = -0.16+0.93X) to tail·beats/sec (x) over speeds ranging from about 1.5 - 4.0 length/sec. Maximum sustained swimming speeds were measured at salinities ranging from 10 to 45 ppt in intervals of 5 ppt. At about 20 to 25 ppt, maximum sustained swimming speeds were close to 4 lengths/sec, but performance was reduced at salinities above or below this range. At 45 ppt, maximum sustained speeds were only about 2 lengths/sec. These results indicate that maximum sustained swimming perform3. John M. Wakeman, Donald e. Wohlshiag
Pages 357-361 |
1977 |
Present taxonomic status permits discussion of larvae of vermilion snapper (Rhomboplites aurorubens), other snappers combined (Lutjanidae), and all groupers com· bined (Serranidae, subfamily Epinephelinae). Larvae of these groups together comprise less than 1% of the total larval fish catch from neuston and bongo samplers in shelf waters of the South Atlantic Bight. Larvae of groupers and snappers are most abundant in spring and in summer respectively. Larvae are distributed in outer shelf and upper slope waters, where current is northerly.
Pages 362-371 |
1977 |
Prevalence And Intensity Of Epistylis On Fishes From Two North Carolina Reservoirs Epistylis infestations occurred on 16 of 32 fish species collected from Mountain Island Lake and Lake Norman, North Carolina, during 1974 and 1975. Percichythids, centrarchids, and ictalurids were the fishes most commonly infested, while infestations were rare on clupeids, cyprinids, and percids. Epistylis was generally more prevalent on fishes during fall (September through November). Percichthyids, followed by centrarchids, had the highest intensity of infestation. Intensity of infestation increased with surface area and length of percichthyids, but not with that of centrarchids. Ronald E. Lewis, James R. Siler, Larry L. Olmstead
Pages 372-379 |
1977 |
Weekly samples of river shrimp (Macrobrachium ohione) were collected from the commercial bait fishery located at Port Allen, Louisiana. Mean size was 30.6 ± 0.2 mm (total length) (n = 7,058); the mode was 27 mm (n = 851); and the range was 17-92 mm. Mean size declined from approximately 39 mm in early March (when fishing began) to approximately 28 mm in mid-August (when fishing ended). The mean size of ovigerous females was 66.1 ± 1.7 mm (n = 88); and the range was 27-92 mm. Bopyrid parasitization is discussed.
Pages 380-386 |
1977 |
Preliminary Report On The Sonar Fish Counter At Pinopolis Dam On Cooper River, South Carolina A sonar fish counter installed at the Pinopolis Dam navigation lock near Moncks Corner, South Carolina in 1975 was used during the last 3 springs to enumerate blueback herring (Alosa aestivalis Mitchill) passing into the Santee-Cooper Lakes. Construction of the biomass fish counter was based on the design of salmon smolt counters used successfully in Alaska. Characteristics of fish movement and schooling patterns were determined and their relationship to accurate counting of herring was evaluated. Initial tests to prove the accuracy of counts were not successful.
Pages 387-391 |
1977 |
Swimming Speeds Of Juvenile Estuarine Fish In A Circular Flume Sustained voluntary swimming speeds of 5 species of juvenile estuarine fish were determined in a laboratory circular flume, 2.5 m in mean circumference. Successful tests depended on the fish's ability to avoid downstream displacement through positive rheotaxis.
Pages 392-398 |
1977 |
Status Of Marine Fish Introductions Into The Fresh Waters Of Texas Techniques have been developed for spawning adult southern flounder. (Paralichthys lethostigma), spotted seatrout (Lynoscion nebulosus), and red drum (Setaenops ocellata) and rearing their larvae for freshwater acclimation and introduction into heated freshwater reservoirs in Texas. Egg production, percentage egg fertilization, percentage hatch, percentage return of larvae stocked into laboratory aquaria and hatchery ponds, and potential for fingerling survival in fresh water were compared for the 3 species. James L. Lasswell, Graciela Garza, William H. Bailey
Pages 399-403 |
1977 |
Prey selection by sauger (Stizostedion canadense) was monitored from November 1976 through April 1977 in the portion of Watts Bar Reservoir, Tennessee, near the Kingston Steam Plant. Threadfin shad (Dorsoma petenense) provided the entire forage base for sauger until the population of threadfin was almost completely eliminated by low temperatures in December and January. Some sauger switched to alternate prey, but food consumption was greatly reduced in February-March as > 75% of stomachs were empty. M. V. McGee, J. S. Griffin, R. B. McLean
Pages 404-411 |
1977 |
Population Dynamics Of Blue Tilapia In Trinidad Lake, Texas Scales from blue tilapia (Tilapia aurea) captured in gillnets indicated that annulus formation occurred primarily in March and April in 1973 and 1974, but in April and May 1975,. Average back-calculated total lengths of males were 197 and 258 mm at Age I and II and for females 183 and 248 mm. Total population of blue tilapia in December 1974 was estimated as 4,856,963. Of this total 3,120,810 were Age 0 and 1,591,823 were Age I. Biomass of the tilapia population was estimated to be 799,978 kg or 2,640 kg/ha. Survival of blue tilapia from Age I to II was calculated to be 7%. Raymond D. Germany, Richard L. Noble
Pages 412-417 |
1977 |
A Preliminary Report On The Control Of Pathogenic Fungi In Earthen Culture Ponds Copper sulfate was evaluated as a potential control for parasitic fungal infestations on largemouth bass (Micropterus salmoides) and striped bass (Morone saxatilis). Treatments were planned to reduce the incidence of free-swimming zoospores of the fungi. Largemouth bass fingerlings (15-20 cm T.L.) were stocked in 0.04 ha ponds and given multiple treatments of copper sulfate at 0.5; 1.0 or 2.0 ppm or Dimethylamine salt of 2,4-Dichlorophenoxy (acetic acid) at 2.0 ppm. Chemical treatments were made on the day before stocking and at regular' intervals thereafter for 6 treatments.
Pages 418-421 |
1977 |
Holding Striped Bass Larvae In Cages Until Swim-Up The need to suspend newly hatched striped bass (Marone saxatilis) larvae until swim-up prompted comparison of holding techniques. Fingerling returns were tabulated over a 3 yr period from fry held in aquaria vs. returns from fry held in Saran cages in rearing ponds. Mean production for a 3 yr period from ponds stocked with fry held in cages was better overall than other methods. The success of holding cages resulted in a substantial saving in manpower as constant care of fry was not needed.
Pages 422-424 |
1977 |
A Recurrence Model For The Prediction Of DDT Flux In Atlantic Menhaden A simple recurrence model is developed for the prediction of DDT flux through Atlantic menhaden (Brevoortia tyrannus). The DDT body burden in young-of-the-year menhaden at any time is equal to the body burden on the previous day plus the DDT accumulated on the current day minus the DDT turnover. Accumulation of DDT is simulated and compared with field observations. Estimations of DDT ingestion, assimilation, turnover, and egestion are made on both per fish and population bases.
Pages 425-431 |
1977 |
Food Habits Of Larval Lepomis SPP. In Old Hickory Reservoir, Tennessee In the Dixon Springs area of the Cumberland River, Tennessee, larval Lepomis spp. began feeding upon crustacean zooplankton, especially Bosmina longirostris, when the fish attained lengths of 6.7 mm in 1975 and 8.8 mm in 1974. Cladooerans remained the dominant food item throughout the larval stage. The fish food selection diversified [to include other taxa.] larva reached approximately n.5 mm. At greater lengths, Lepomis spp larvae and postlarvae begin to rely more on chironomid larvae.
Pages 432-436 |
1977 |