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Full-Text Articles in Biology
Review Of Sexual Selection: Mate Choice And Courtship In Nature By James L. Gould And Carol Grant Gould, Marlene Zuk, Gita R. Kolluru, Kurt A. Mckean
Review Of Sexual Selection: Mate Choice And Courtship In Nature By James L. Gould And Carol Grant Gould, Marlene Zuk, Gita R. Kolluru, Kurt A. Mckean
Biological Sciences
No abstract provided.
Sources Of Variability In The Column Photosynthetic Cross Section For Antarctic Coastal Waters, Mark A. Moline, Herve Claustre, Barbara B. Prezelin
Sources Of Variability In The Column Photosynthetic Cross Section For Antarctic Coastal Waters, Mark A. Moline, Herve Claustre, Barbara B. Prezelin
Biological Sciences
Using a highly resolved Long Term Ecological Research (LTER) database collected near Palmer Station, Antarctica, from 1991 to 1994, the variability in the column photosynthetic cross section (ψ*, m2 g Chl a -1) was analyzed. The relationship between the daily integrated primary production rates versus the product of surface irradiance (QPAR(0*)) and the integrated chlorophyll content (down to 0.1% QPAR(0*)) gave a ψ* value of 0.0695 m 2 g Chl a-1 (r2 = 0.85, p 2 g Chl a-1) with extreme values extending over a fiftyfold range (0.009-0.488 m 2 …
Tree Root Response To Circling Root Barriers, Laurence R. Costello, Clyde L. Elmore, Scott J. Steinmaus
Tree Root Response To Circling Root Barriers, Laurence R. Costello, Clyde L. Elmore, Scott J. Steinmaus
Biological Sciences
Root system size and distribution were measured for Raywood ash (Fraxinus oxycarpa 'Raywood') and Lombardy poplar (Populus nigra 'Italica') planted with and without circling root barriers. Trees with circling barriers had fewer numbers of roots than controls (no barriers), but mean root diameters were similar. Root depth 30 cm outside barriers was greater for trees with barriers, but at 90 and 150 cm away, depth was equivalent to controls. Roots tended to grow toward the soil surface after growing under the barriers. No consistent differences in root response to any of the four types of barriers tested were …
Isolation, Characterization, And Diversity Of Microorganisms From Amber, Raúl J. Cano
Isolation, Characterization, And Diversity Of Microorganisms From Amber, Raúl J. Cano
Biological Sciences
Retrieval of viable bacteria from fossil material dating from the Oligocene back to the Miocene opens the opportunity to study the evolution of prokaryotes through the evolution of their DNA, their physiology, and their ecology. This unique system in which ancient organisms and their genes may be compared directly, rather than by inference, with modern homologues is without precedent. Clearly, however, confirmation of the fossil origin of such isolates must be made in a manner that would allay reasonable skepticism. Present approaches of verification of authenticity of fossil DNA are either arbitrary or potentially unconvincing, because of their dependence on …
Shortfin Mako, Isurus Oxyrinchus, Impaled By Blue Marlin, Makaira Nigricans (Teleostei: Istiophoridae), Harry L. Fierstine, Gregor M. Cailliet, Julie A. Neer
Shortfin Mako, Isurus Oxyrinchus, Impaled By Blue Marlin, Makaira Nigricans (Teleostei: Istiophoridae), Harry L. Fierstine, Gregor M. Cailliet, Julie A. Neer
Biological Sciences
No abstract provided.
An Atlantic Blue Marlin, Makaira Nigricans, Impaled By Two Species Of Billfishes (Teleostei:Istiophoridae), Harry L. Fierstine
An Atlantic Blue Marlin, Makaira Nigricans, Impaled By Two Species Of Billfishes (Teleostei:Istiophoridae), Harry L. Fierstine
Biological Sciences
Billfishes (Istiophoridae and Xiphiidae) are notorious for driving their rostra into animate and inanimate objects, a behavior usually resulting in transverse fracture of the bill and leaving the distal segment embedded (Gudger, 1940; Frazier et aI., 1994). Some billfishes recover from this loss because there are records ofapparently healthy fish with missing rostra (Frazier et aI., 1994). Generally only one rostral fragment is found in each object, but multiple stabbings have been reported. For example, fragments of three swordfish bills were discovered in a whale during flensing (Jonsgard, 1962), several "marlin" spears were found impaled in bales of rubber that …
Instar Susceptibility Of The Monarch Butterfly (Danaus Plexippus) To The Neogregarine Parasite, Ophryocystis Elektroscirrha, Kingston L. H. Leong, Michael A. Yoshimura, H. K. Kaya, H. Williams
Instar Susceptibility Of The Monarch Butterfly (Danaus Plexippus) To The Neogregarine Parasite, Ophryocystis Elektroscirrha, Kingston L. H. Leong, Michael A. Yoshimura, H. K. Kaya, H. Williams
Biological Sciences
The susceptibility of the monarch butterfly (Danaus plexippus) larvae to the neogregarine parasite, Ophryocystis elektroscirrha, was tested in the laboratory. Spore loads recovered from infected monarch butterflies were directly related to the inoculum level, larval stage of the host, and spore age. There was a linear relationship between spores ingested by first instar larvae and spore concentration. Larvae feeding on leaves treated with 0, 50, 500, 5000, or 50,000 spores averaged 0, 0, 193, 457, or 1,255 spores, respectively, on the abdomens of the adult butterflies. When first, third, and fifth instar larvae were given 14.5 spores/mg …
Palmer Lter: Stable Interannual Successional Patterns Of Phytoplankton Communities In The Coastal Waters Off Palmer Station, Antarctica, Mark A. Moline, Barbara B. Prezelin, Oscar Schofield
Palmer Lter: Stable Interannual Successional Patterns Of Phytoplankton Communities In The Coastal Waters Off Palmer Station, Antarctica, Mark A. Moline, Barbara B. Prezelin, Oscar Schofield
Biological Sciences
No abstract provided.
Review Of A Manual Of California Vegetation By J. Sawyer & T. Keeler-Wolf, David J. Keil
Review Of A Manual Of California Vegetation By J. Sawyer & T. Keeler-Wolf, David J. Keil
Biological Sciences
No abstract provided.