Download or read book Effects of Exploitation on Populations of Daphnia Pulex written by James Strother Kent and published by . This book was released on 1991 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Predation on the Demography and Genetics of a Facultatively Parthenogenetic Daphnia Population written by Leif K. Hembre and published by . This book was released on 2002 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Morphological Changes Fish Predation and Elements of Sexual Reproduction in Populations of Daphnia Pulex written by John R. Krummel and published by . This book was released on 1978 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of PH Stress and Harvesting on the Dynamics of Laboratory Populations of Daphnia Pulex written by U.S. Fish and Wildlife Service and published by . This book was released on 1983 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book POPULATION DYNAMICS OF DAPHNIA PULEX UNDER STRESS EFFECTS OF LOW PH AND FOOD MODELLING STOCHASTIC STATISTICS LIFE TABLES written by PAUL JOSEPH RAGO and published by . This book was released on 1986 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: reduced the rate of growth in length but not the maximum length attained.

Download or read book Population Dynamics of Daphnia Pulex written by Sidney John Crabtree and published by . This book was released on 1975 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Nitrate Exposure on Daphnia Pulex written by Sarah B. Semon and published by . This book was released on 2012 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Zinc Deprivation on Daphnia Pulex and Daphnia Magna written by Paula Barone Caffrey and published by . This book was released on 1987 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genotypic and Phenotypic Variation in Populations of Daphnia Pulex written by Susan Rose Krepp and published by . This book was released on 1977 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Daphnia pulex population from a natural source written by An Goorden and published by . This book was released on 1996 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Consequences of Predation by Chaoborus Americanus on Daphnia Pulex written by Ken Rollin Spitze and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The direct and indirect effects of predation by the aquatic dipteran larva Chaoborus americanus on the crustacean Daphnia pulex were investigated with a combination of laboratory and field assessments. All approaches indicated that Chaoborus inflict a pattern of size-specific mortality on Daphnia that can be well approximated by a Gaussian function. Maximum vulnerability is experienced by Daphnia with body size of about 1 mm. Daphnia larger that 2 mm were essentially invulnerable. Several techniques are presented that remove biases that exist in previous methods used to assess size-specific vulnerability. C. americanus emits a water soluble chemical that induces a morphological change within clones of D. pulex, most notably, the formation of a small horn on the dorsal margin of the head. Controlled laboratory experiments indicate that the horned morph experiences a 34-67% reduction in mortality, relative to the normal morph. Life table assays of many clones that compared the induced and non-induced morphs of each clone under identical conditions (except for induction factor) indicate substantial genotype x environment interaction for life history characters. Some clones showed a dramatic increase in body size, growth, and reproduction while other clones displayed a delay in reproduction, indicating a potential energetic cost to the induced morph. The significant genotype x environment interactions for many life-history characters indicate substantial genetic variance for the phenotypic plasticity. Assessments from large genetically diverse replicate laboratory populations indicate that Chaoborus predation can have significant effects on the clonal composition of Daphnia populations. Life table studies of laboratory populations in the presence and absence of Chaoborus indicate that Chaoborus predation leads to significant changes in mean population life history. Increased immature body size and delayed maturity were the most significant effects attributable directly to Chaoborus predation.

Download or read book Chronic and Acute Effects of the Insecticide Toxaphene on Daphnia Pulex written by James David Chiles and published by . This book was released on 1978 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Consequences of Anti predator Strategies for Population Dynamics written by Kylie Sarah Ruth Yarlett and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Consequences of Anti predator Strategies for Population Dynamics written by Kylie Sarah Ruth Yarlett and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Effects on an Important Zooplankter Daphnia Pulex of the Columbia River written by Donovan R. Craddock and published by . This book was released on 1970 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seasonal Succession and Variable Daphnia Dominance in Fishless Ponds written by Christopher Franklin Steiner and published by . This book was released on 2001 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Tentative Seven Day Test for Predicting Effects of Stress on Populations of Daphnia Pulex written by AL. Buikema and published by . This book was released on 1980 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both acute and chronic effects of water-soluble fractions of several hydrocarbon compounds and a simulated refinery effluent (SRE) were evaluated under laboratory conditions. The 48-h LC50 values (as percent water-soluble fractions) for creosote, No. 2 fuel oil, naphthalene, and phenanthrene were 2.9, 34.1, 57.5, and 100 percent, respectively. For the SRE, the 48-h LC50 was 0.03 times the formulation. For all the chronic studies, young Daphnia were exposed to sublethal concentrations corresponding to the calculated LC20 and LC30 values. Of the seven biological parameters measured, each compound had its greatest effect on the growth rate and number of live young produced. The effects of creosote and phenanthrene were the most dramatic.