Record Display for the EPA National Library Catalog


Main Title Habitat availability and utilization by benthos and nekton in Hall's Lake and West Galveston Bay /
Author Minello, Thomas Joseph,
Publisher U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southeast Fisheries Center, Galveston Laboratory,
Year Published 1991
Report Number NOAA Technical Memorandum NMFS-SEFC-275
OCLC Number 23451030
Subjects Benthos--Habitat--Texas--Galveston Bay ; Nekton--Habitat--Texas--Galveston Bay ; Benthos--Behavior--Texas--Galveston Bay ; Nekton--Behavior--Texas--Galveston Bay ; Galveston Bay (Tex) ; Hall's Lake (Tex) ; Habitat selection
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EMAD  US NOAA TM NMFS-SEFC-275 1991 Region 6 Library/Dallas,TX 02/08/2011
Collation v, 10, [27] pages : maps ; 28 cm
"January 1991." Includes bibliographical references (page 10).
Contents Notes
Salt marsh habitats along the shoreline of Hall's Lake are threatened by wave erosion, but the reconstruction of barrier islands to reduce this erosion will modify or destroy nonvegetated habitats in West Bay. In order to provide information on the relative value of these estuarine habitats for fishery species, we identified the habitats present and sampled vegetation, sediments, and benthic and nektonic organisms in May 1990. In comparison with nonvegetated bottom, Spartina alterniflora marshes had higher sediment organic content and densities of infaunal crustacea, macrocrustacea (brown shrimp, grass shrimp, and blue crabs), and pinfish. Nonvegetated sites had greater numbers of forage fish such as anchovies. Both trawls and drop samples were used to sample nonvegetated bottom, and there appeared to be little difference among the nonvegetated sites. Mean densities of animals collected in trawls, however, were less than 50% of densites measured with the drop sampler. The value of salt marsh habitats for estuarine animals varied, and within Hall's Lake there was a significant correlation between marsh elevation and density of most macrofauna. In addition, densities of brown shrimp and pinfish were significantly greater in the well-established marshes of Hall's Lake compared with the narrow intermittent marsh present along the West Bay shoreline. Conclusions on relative habitat value based on samples collected at one point in time can be misleading, but data from historical samples, collected in the Hall's Lake marsh, suggest that densities of macrofauna observed in our study are not anomalous. In conjunction with other published data on habitat value in Galveston Bay, our results indicate that for most crustacea the Hall's Lake marshes are more valuable than the other habitats examined. The relative value of the habitats for fishes was highly dependent upon the species. A survey of the West Bay shoreline indicated that valuable salt marsh habitats could be established on created barrier islands if direction of exposure and shoreline slope were controlled.