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Filter Total Items: 3377

Comparative sensitivity of five species of macrophytes and six species of algae to atrazine, metribuzin, alachlor, and metolachlor

This study determined the relative sensitivity of five species of aquatic macrophytes and six species of algae to four commonly used herbicides (atrazine, metribuzin, alachlor, and metolachlor). Toxicity tests consisted of 96-h (duckweed and algae) or 14-d (submerged macrophytes) static exposures. The triazine herbicides (atrazine and metribuzin) were significantly more toxic to aquatic plants tha
Authors
James F. Fairchild, Shane Ruessler, A. Ron Carlson

Estimates of annual survival probabilities for adult Florida manatees (Trichechus manatus latirostris)

The population dynamics of large, long-lived mammals are particularly sensitive to changes in adult survival. Understanding factors affecting survival patterns is therefore critical for developing and testing theories of population dynamics and for developing management strategies aimed at preventing declines or extinction in such taxa. Few studies have used modern analytical approaches for analyz
Authors
C.A. Langtimm, T. J. O'Shea, R. Pradel, C.A. Beck

Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks

This edition of Common and Scientific Names of Invertebrates from the United States and Canada: Mollusks represents the efforts of 15 molluscan taxonomic specialists in compiling a comprehensive checklist of the mollusks found in North America and Canada and their vernacular names. Built upon the success of the first edition, the authors have updated the nomenclature to reflect recent phylogenetic
Authors
D. D. Turgeon, J.F. Quinn, A.E. Bogan, E. V. Coan, F.G. Hochberg, W.G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F.G. Thompson, M. Vecchione, J.D. Williams

Imperilled wetlands - Book review: Mangroves and saltmarshes

Review info: Mangroves and saltmarshes. Edited by Eric Wolanski and Charles S. Hopkinson Jr., 1996.
Authors
Thomas J. Smith

Variations in zebra mussel (Dreissena polymorpha) veliger densities throughout 1996 at Dam 52 on the lower Ohio River

Zebra mussel veliger densities were monitored throughout 1996 at Lock and Dam 52 on the lower Ohio River near Brookport, IL. The spawning season occurred between mid June and early September with veliger densities peaking at 30,000/m3 in late June. Veliger first appeared at a water temperature of 21° C. When spawning ended in September the water temperature was 22 °C. Veligers were found throughou
Authors
Darren P. Reed, Jeffrey J. Herod, James B. Sickel

Salinity characteristics of Florida Bay: A review of the archived data set (1955-1995)

No abstract available.
Authors
S. Paul Orlando, C. John Klein, Michael B. Robblee

Modeling spatial distribution of the Unionid mussels and the core-satellite hypothesis

This paper discusses the spatial distribution patterns of the various species of the Unionid mussels as functions of their respective life-cycle characteristics. Computer simulations identify two life-cycle characteristics as major factors governing the abundance of a species, namely the movement range of their fish hosts and the success rate of the parasitic larval glochidia in finding fish hosts
Authors
Hooi-Ling Lee, Donald L. DeAngelis, Hock Lye Koh

Of reef fishes, overfishing and in situ observations of fish traps in St. John, U.S. Virgin Islands

Fishing with a variety of methods and gears, including traps, is allowed within the waters of Virgin Islands National Park (St. 10hn, U.S. Virgin Islands). Randall's 1 9 6 1 observation of the effects of overushing in nearshore waters off Sto John has been followed by three and a half decades of reports documenting the declining reef fish catch in the Virgin Islands and much of the Caribbean. To a
Authors
Virginia H. Garrison, Caroline S. Rogers, J. Beets

Opinions and other actions of the International commission involving fishes: Appendix B

No abstract available.
Authors
W. N. Eschmeyer, W. F. Weibrecht, William F. Smith-Vaniz