Browsing by Author "Stevens, James R."
Now showing 1 - 11 of 11
- Results Per Page
- Sort Options
Item Checklist of Invertebrates of Area M-1 - Fisheries Survey of Area M-1(Texas Game and Fish Commission, 1960-02-01) Stevens, James R.Objectives: To determine the invertebrates present and their relative abundance. Also, migrations, growth rates, life histories and distribution will be included.Item Checklist of the Fishes of Area M-1 - Fisheries Survey of Area M-1(Texas Game and Fish Commission, 1960-02-01) Stevens, James R.Objectives: To determine the fish present in the area, their relative abundance, distribution, life histories and movements as correlated with seasons, tides, temperatures and salinity.Item Checklist of the Invertebrates of Region M-1 and M-3 - Ecological Survey of Regions M-1 and M-3(Texas Game and Fish Commission Marine Laboratory, 1962) Stevens, James R.Objectives: To determine the invertebrates present in the regions involved and to determine their relative abundance and their relationship to the environment.Item Creel Census of San Antonio and Espiritu Santo Bays - Analysis of Populations of Sports and Commercial Fin-fish and of Factors Which Affect These Populations in the Coastal Bays of Texas(Texas Game and Fish Commission Marine Laboratory, 1963) Stevens, James R.Creel census data were obtained by interviewing fishermen and measuring their catch at a single fishing camp in the San Antonio Bay Area. Other camp owners were asked to keep records on number of fishermen using their camps during the survey, but such records were not kept. Census was taken on Monday and Tuesday of the first week, Tuesday and Wednesday of the second week, and this same frequency of beginning one day later each week was followed throughout the survey. Crews, each composed of three Game and Fish Commission employees, conducted the census work. Results of the census showed the catch per man-hour to be small in both numbers and pounds. This may be partially attributed to the hot weather present during the survey.Item Hydrographic and Climatological Study of Area M-1 - Ecological Survey of Area M-1(Texas Game and Fish Commission Marine Laboratory, 1962) Stevens, James R.In order to measure the characteristics of water and climate present in Area M-1, water samples were taken monthly from Sabine Lake for salinity and temperature determination. Data on air temperature, precipitation, wind and river discharge were taken from publications. Air and water temperature averages were found to show considerable variation in some months. This was due to the fact that water temperatures were recorded only once each month. Salinities in Sabine Lake are normally low. During the course of the nineteen month study, salinities averaged below 15 parts per thousand in all months except June, 1960. Horizontal and vertical salinity gradients were present. The vertical gradient is especially conspicuous in that portion of the lake nearest the Gulf. The horizontal gradient, with highest salinities in that portion of the lake nearest the Gulf, is disrupted during periods of low river discharge. During such periods, high salinity water enters the upper end of the lake by way of the Sabine-Neches Ship Channel resulting in higher salinities at each end of the lake with lesser salinities in the center.Item Hydrographic and climatological study of Area M-3 - Ecological Survey of Area M-3(Texas Game and Fish Commission Marine Laboratory, 1962) Stevens, James R.; Texas Game and Fish Commission Marine Fisheries Project Reports 1960-1961In order to obtain information on the characteristics of water and climate that prevail in Galveston Bay, East Bay, and West Bay, established stations were sampled regularly. Information derived from samples included water temperature and salinity. Additional information of this nature was derived from other bay studies. Information on river flow, air temperature and wind were derived from publications. Water temperatures were found to follow air temperatures closely. The prevailing winds in all but two months were on-shore winds. Salinities were found to vary inversely with the volume of fresh water entering the bays from the Trinity River. West Bay, due to its locations, is affected less than the other bays by fresh water from the Trinity River. Vertical and horizontal salinity gradients were found to be the normal pattern in East Bay and Galveston Bay. West Bay, with two major passes to the Gulf of Mexico and with no major source of fresh water, normally maintained higher salinities than the other bays.Item Hydrographic and Climatological Survey of Area M-1 and the Study of the Chemical and Physical Characteristics of the Waters of M-1 - Fisheries Survey of Area M-1(Texas Game and Fish Commission, 1960-02-01) Stevens, James R.Objectives: To study the characteristics of the waters of Sabine Lake and the factors of the climate which affect the marine organisms of the lake.Item Hydrographic and Meteorological Study of the Galveston Bay System - Analysis of Populations of Sports and Commercial Fin-fish and of Factors which Affect these Populations in the Coastal Bays of Texas(Texas Game and Fish Commission, 1963) Stevens, James R.; Texas Game and Fish Commission Marine Fisheries Project Reports 1961-1962Hydrographic data as gathered in the field and climatogical data as taken from publications are presented in this report. Air and water temperatures varied little from previous studies. Salinities were found to be higher than in the previous study. This was caused by reduced rainfall and the resulting decrease in fresh water flow from rivers.Item Population Studies of the Sports and Commercial Fin-fish and Forage Species of the Galveston Bay system(Texas Game and Fish Commission Marine Laboratory, 1963) Stevens, James R.; Texas Game and Fish Commission Marine Fisheries Project Reports 1961-1962Collections were made at fixed stations with various types of gear to obtain samples of adult game fish, juvenile game fish, and forage species. The stations in West Bay generally produced larger catches of juvenile and adult game fish than did the stations in other bays. The reverse was true of forage collections. Those forage stations in the less saline areas of the bay, for example, the Clear Lake Station, produced larger catches than the lower bay stations. Fish tags, returned during the study, indicated little movement of those fish recaptured. Redfish tag returns were much higher than those from other species.Item Study of the Commercial Shrimp of Area M-1 - Fisheries Survey of Area M-1(Texas Game and Fish Commission, 1960-02-01) Stevens, James R.Objectives: To determine the species of commercial shrimp present in Sabine Lake and to gather information concerning their size and abundance throughout the year.Item Study of the Menhaden Fishery of Area M-1 - Fisheries Survey of Area M-1(Texas Game and Fish Commission, 1960-02-01) Stevens, James R.Objectives: To make a study of the menhaden fishery to include the economic aspects of the operation, the annual catch, per cent of the catch made up by game fish, techniques used in fishing and the uses of the products.