Search Results - "Angus, RA"

Effects of ocean acidification over the life history of the barnacle Amphibalanus amphitrite by McDonald, MR, McClintock, JB, Amsler, CD, Rittschof, D, Angus, RA, Orihuela, B, Lutostanski, K

“…Increased levels of atmospheric CO sub(2) are anticipated to cause decreased seawater pH. Despite the fact that calcified marine invertebrates are particularly…”
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Ocean warming and acidification alter Antarctic macroalgal biochemical composition but not amphipod grazer feeding preferences by Schram, Julie B., Schoenrock, Kathryn M., McClintock, James B., Amsler, Charles D., Angus, Robert A.

“…Increased anthropogenic atmospheric CO₂ concentrations have resulted in ocean warming and alterations in ocean carbonate chemistry, decreasing seawater pH…”
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Seawater acidification more than warming presents a challenge for two Antarctic macroalgal-associated amphipods by Schram, Julie B., Schoenrock, Kathryn M., McClintock, James B., Amsler, Charles D., Angus, Robert A.

“…Elevated atmospheric pCO₂ concentrations are triggering seawater pH reductions and seawater temperature increases along the western Antarctic Peninsula (WAP)…”
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Production of Androgens by Microbial Transformation of Progesterone in Vitro: A Model for Androgen Production in Rivers Receiving Paper Mill Effluent by Jenkins, Ronald L., Wilson, Elizabeth M., Angus, Robert A., Howell, W. Mike, Kirk, Marion, Moore, Ray, Nance, Marione, Brown, Amber

“…We have previously documented the presence of progesterone and androstenedione in the water column and bottom sediments of the Fenholloway River, Taylor…”
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Identification of androstenedione in a river containing paper mill effluent by Jenkins, Ronald, Angus, Robert A., McNatt, Heather, Howell, W. Mike, Kemppainen, Jon A., Kirk, Marion, Wilson, Elizabeth M.

“…Effluent from a paper mill discharging into the Fenholloway River, Taylor County, Florida, USA, contains chemicals that masculinize females of the resident…”
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Intraspecific agonistic arm-fencing behavior in the Antarctic keystone sea star Odontaster validus influences prey acquisition by McClintock, JB, Angus, RA, Ho, CP, Amsler, CD, Baker, BJ

“…The importance of intraspecific social behaviors in mediating foraging behaviors of marine invertebrate keystone predators has received little attention. In…”
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Effects of 17α-ethynylestradiol on sexual development of male western mosquitofish ( Gambusia affinis) by Angus, Robert A., Stanko, Jason, Jenkins, Ronald L., Watson, R. Douglas

“…Juvenile male western mosquitofish ( Gambusia affinis) were exposed to different concentrations of 17α-ethynyl estradiol (EE2) in the diet during the period of…”
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Androstenedione and Progesterone in the Sediment of a River Receiving Paper Mill Effluent by Jenkins, Ronald L., Wilson, Elizabeth M., Angus, Robert A., Howell, W. Mike, Kirk, Marion

“…The Fenholloway River near Perry, Florida, receives effluent from a paper mill and contains populations of masculinized female eastern mosquitofish, Gambusia…”
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REPRODUCTIVE CHARACTERISTICS OF MALE MOSQUITOFISH (GAMBUSIA AFFINIS) INHABITING A SMALL SOUTHEASTERN U.S. RIVER RECEIVING TREATED DOMESTIC SEWAGE EFFLUENT by Angus, Robert A., Weaver, Season A., Grizzle, John M., Watson, R. Douglas

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Historical Changes in the Ichthyofaunal Assemblages of the Upper Cahaba River in Alabama Associated with Extensive Urban Development in the Watershed by Onorato, Dave, Angus, Robert A., Marion, Ken R.

“…The upper Cahaba River in Alabama has experienced extensive urban development in its watershed in recent years. To assess the effects that these developments…”
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Gonopodium Development in Normal Male and 11-Ketotestosterone-Treated Female Mosquitofish (Gambusia affinis): A Quantitative Study Using Computer Image Analysis by Angus, Robert A., McNatt, Heather B., Howell, W.Mike, Peoples, Shearlyn D.

“…Mature male mosquitofish possess a highly modified anal fin called a gonopodium that develops from an unmodified female-like anal fin under the influence of…”
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Mosquitofish ( Gambusiaaffinis) vitellogenin: identification, purification, and immunoassay by Tolar, Joseph F., Mehollin, Amy R., Watson, R.Douglas, Angus, Robert A.

“…Vitellogenin is a phospholipoglycoprotein precursor of egg yolk. In mature female fish, vitellogenin is synthesized and secreted by the liver in response to…”
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Natural Growth Rates of Ambystoma maculatum in Alabama by Blackwell, Eric A, Angus, Robert A, Cline, George R, Marion, Ken R

“…The Spotted Salamander (Ambystoma maculatum) is widespread throughout the eastern United States and southern Canada. In 1997, we initiated a long-term study of…”
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The use of feather meal as a replacement for fish meal in the diet of Oreochromis niloticus fry by Bishop, Charles D., Angus, Robert A., Watts, Stephen A.

“…Four diets were developed in which equal weights of hydrolyzed feather meal (F) replaced equal weights of fish and meat and bone (FMB) meal in the following…”
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Longitudinal Variations in the Ichthyofaunal Assemblages of the Upper Cahaba River: Possible Effects of Urbanization in a Watershed by Onorato, Dave, Marion, Ken R., Angus, Robert A.

“…We conducted an ichthyofaunal bioassessment on the upper Cahaba River in north central Alabama during the fall of 1995, the spring and fall of 1996, and the…”
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Population Studies of Blue Crabs in Soft-bottom, Unvegetated Habitats of a Subestuary in the Northern Gulf of Mexico by McClintock, James B., Marion, Ken R., Dindo, John, Hsueh, Pan-Wen, Angus, Robert A.

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Geographic Dispersal and Clonal Diversity in Unisexual Fish Populations by Angus, Robert A.

“…Tissue grafting was used to investigate clonal diversity in populations of the unisexual hybrid fish, Poeciliopsis monacha-occidentalis from five rivers in…”
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Clonal Diversity in the Unisexual Fish Poeciliopsis monacha-lucida: A Tissue Graft Analysis by Angus, Robert A., Schultz, R. Jack

“…Clonal variability and the factors affecting variability were examined in populations of the hybridogenetic unisexual fish Poeciliopsis monacha-lucida from…”
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Variation and Heterozygosity in Sexually vs. Clonally Reproducing Populations of Poeciliopsis by Vrijenhoek, Robert C., Angus, Robert A., Schultz, R. Jack

“…Fishes of the genus Poeciliopsis comprise both sexual and unisexual forms that coexist in northwest Mexico. This study compares genetic variability and…”
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Daphnia and the Search for Heterosis by Angus, Robert A.

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