摘要:

ABSTRACTThe academic world and the business community not only coexist, but they actually depend on each other. The researcher needs funds and support for his work; the business man needs the researcher to help provide the answers.

ISSN:1043-5166    

DOI:10.1111/j.1749-7345.1971.tb00036.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

摘要:

ABSTRACTA survey was conducted to identify the macrofauna of a marsh adjacent to West Galveston Bay, Texas. The factors affecting its distribution were studied to help evaluate changes which might result in the event that large areas of the marsh were impounded for shrimp culture.As a result of frequent tidal floods, saline conditions generally prevailed within the marsh. Freshwater floods resulting from local rainfall were common, but salt leached from the bottom sediments coupled with subsequent tidal floods readily reestablished saline conditions.The fauna consisted of a variety of marine and estuarine species. Those species that were abundant throughout the year and constituted the stable macrofauna were Cyprinodon variegatus, Fundulus grandis, Poecilia latipinna, Mugil cephalus, Menidia beryllina, Palaemonetes sp., and Callinectes sapidus. These are among the hardiest of coastal aquatic animals and exhibited broad temperature and salinity tolerances.Marine dependent species were able to enter the marsh during tidal floods, and many were trapped when waters receded. Postlarvae of some of these species were able to invade the marsh at normal tide level through narrow, vegetation‐clogged ditches leading inland from the bay. Conditions were seldom favorable, however, for the return of marine species to the bay. They usually died as a result of low temperatures during the winter or drought conditions during the summer. These species generally disappeared from the marsh following freshwater floods and it was assumed that they were either forced out into the bay or died as a result of the rapid decline in salinity which usually occurred.Construction of large‐scale impoundments for shrimp culture, at the expense of removing flooded grasslands, would alter the physical features of the marsh and significantly reduce habitat suitable for year‐round survival of the stable macrofauna. In addition, competitor and predator control in these ponds would require the removal of all aquatic macrofauna other than shrimp. The impact of these changes on the total marsh ecosystem is not known but should be considered and studied in detail before ponds are constructed. Conceivably, marsh areas could be managed so as to insure a reasonable amount of habitat for the stable macrofauna while allowing ample lands for shrimp cu

ISSN:1043-5166    

DOI:10.1111/j.1749-7345.1971.tb00037.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

ISSN:1043-5166    

DOI:10.1111/j.1749-7345.1971.tb00038.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

ISSN:1043-5166    

DOI:10.1111/j.1749-7345.1971.tb00039.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

ISSN:1043-5166    

DOI:10.1111/j.1749-7345.1971.tb00040.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY

ISSN:1043-5166    

DOI:10.1111/j.1749-7345.1971.tb00041.x

出版商:Blackwell Publishing Ltd    

年代:1971

数据来源: WILEY