scholarly journals A preliminary investigation into the ecology and behavior of blue whales (Balaenoptera musculus) in the Gulf of Corcovado, Chile

2014 ◽  
Author(s):  
Alessandro Bocconcelli ◽  
Leigh S. Hickmott ◽  
Rafaela Landea Briones ◽  
Gloria Howes ◽  
Laela S. Sayigh
Keyword(s):  
Preliminary Investigation ◽  
Balaenoptera Musculus ◽  
And Behavior ◽  
Blue Whales

Sexual attitudes and behavior of bulimic women: A preliminary investigation

1990 ◽  
Vol 19 (4) ◽  
pp. 395-411 ◽  
Author(s):  
Lori M. Irving ◽  
Kathleen McCluskey-Fawcett ◽  
David Thissen
Keyword(s):  
Sexual Attitudes ◽  
Preliminary Investigation ◽  
And Behavior ◽  
Attitudes And Behavior ◽  
Bulimic Women

scholarly journals Blue whales (Balaenoptera musculus) optimize foraging efficiency by balancing oxygen use and energy gain as a function of prey density

2015 ◽  
Vol 1 (9) ◽  
pp. e1500469 ◽  
Author(s):  
Elliott Lee Hazen ◽  
Ari Seth Friedlaender ◽  
Jeremy Arthur Goldbogen
Keyword(s):  
Energy Intake ◽  
Prey Density ◽  
Prey Capture ◽  
Energy Gain ◽  
Foraging Strategies ◽  
Foraging Efficiency ◽  
Energetic Efficiency ◽  
Breath Hold ◽  
Balaenoptera Musculus ◽  
Blue Whales

Terrestrial predators can modulate the energy used for prey capture to maximize efficiency, but diving animals face the conflicting metabolic demands of energy intake and the minimization of oxygen depletion during a breath hold. It is thought that diving predators optimize their foraging success when oxygen use and energy gain act as competing currencies, but this hypothesis has not been rigorously tested because it has been difficult to measure the quality of prey that is targeted by free-ranging animals. We used high-resolution multisensor digital tags attached to foraging blue whales (Balaenoptera musculus) with concurrent acoustic prey measurements to quantify foraging performance across depth and prey density gradients. We parameterized two competing physiological models to estimate energy gain and expenditure based on foraging decisions. Our analyses show that at low prey densities, blue whale feeding rates and energy intake were low to minimize oxygen use, but at higher prey densities feeding frequency increased to maximize energy intake. Contrary to previous paradigms, we demonstrate that blue whales are not indiscriminate grazers but instead switch foraging strategies in response to variation in prey density and depth to maximize energetic efficiency.

scholarly journals From conservation genetics to conservation genomics: a genome-wide assessment of blue whales ( Balaenoptera musculus ) in Australian feeding aggregations

2018 ◽  
Vol 5 (1) ◽  
pp. 170925 ◽  
Author(s):  
Catherine R. M. Attard ◽  
Luciano B. Beheregaray ◽  
Jonathan Sandoval-Castillo ◽  
K. Curt S. Jenner ◽  
Peter C. Gill ◽  
...  
Keyword(s):  
Population Structure ◽  
Adaptive Divergence ◽  
Balaenoptera Musculus ◽  
Blue Whale ◽  
Conservation Genomics ◽  
Next Generation Sequencing Technology ◽  
Genome Wide ◽  
A Genome ◽  
Wide Range ◽  
Blue Whales

Genetic datasets of tens of markers have been superseded through next-generation sequencing technology with genome-wide datasets of thousands of markers. Genomic datasets improve our power to detect low population structure and identify adaptive divergence. The increased population-level knowledge can inform the conservation management of endangered species, such as the blue whale ( Balaenoptera musculus ). In Australia, there are two known feeding aggregations of the pygmy blue whale ( B. m. brevicauda ) which have shown no evidence of genetic structure based on a small dataset of 10 microsatellites and mtDNA. Here, we develop and implement a high-resolution dataset of 8294 genome-wide filtered single nucleotide polymorphisms, the first of its kind for blue whales. We use these data to assess whether the Australian feeding aggregations constitute one population and to test for the first time whether there is adaptive divergence between the feeding aggregations. We found no evidence of neutral population structure and negligible evidence of adaptive divergence. We propose that individuals likely travel widely between feeding areas and to breeding areas, which would require them to be adapted to a wide range of environmental conditions. This has important implications for their conservation as this blue whale population is likely vulnerable to a range of anthropogenic threats both off Australia and elsewhere.

Attending Step Meetings as a Course Requirement: A Preliminary Investigation

2002 ◽  
Vol 29 (2) ◽  
pp. 125-128 ◽  
Author(s):  
Ann R. Bristow ◽  
Jennifer Provost ◽  
Kristin Morton
Keyword(s):  
Alcoholics Anonymous ◽  
Addiction Treatment ◽  
Preliminary Investigation ◽  
Similar Activity ◽  
Negative Feelings ◽  
And Behavior

Students in Drugs and Behavior courses evaluated their experiences of attending 12-step meetings (e.g., Alcoholics Anonymous). We describe the parameters of this course requirement and offer suggestions for implementation. As hypothesized, students reported that attendance at 12-step meetings increased their understanding of addiction treatment and was relevant to the objectives of a Drugs and Behavior course. These 2 dimensions were also positively correlated with students' reports of comfort attending meetings. Students wrote reaction papers addressing positive and negative feelings and issues regarding 12-step meeting attendance. We provide examples of these comments, as well as students' suggestions for increasing comfort when attending meetings, to guide instructors who might want to assign a similar activity.

Preparation of 99mTc(CO)3-TPPS4 and its biological behavior evaluation

2011 ◽  
Vol 15 (04) ◽  
pp. 271-276 ◽  
Author(s):  
Yuqing Yang ◽  
Hu Song ◽  
Hongtao Song ◽  
Weiwei Zhao ◽  
Manfei Pu
Keyword(s):  
Complex System ◽  
Tumor Cells ◽  
Paper Chromatography ◽  
Tumor Tissue ◽  
Preliminary Investigation ◽  
Cell Uptake ◽  
Biological Behavior ◽  
Porphyrin Ring ◽  
Ring Conformation ◽  
And Behavior

99mTc(CO)3-TPPS4 was prepared via the precursor [99mTc(CO)3(H2O)3]+ and a preliminary investigation on its stability and behavior in Hep2 tumor cells and hepatoma-bearing mice were conducted. Labeling yield and stability of 99mTc(CO)3-TPPS4 was radioactively analyzed by paper chromatography. Hep2 tumor cells were incubated with 99mTc(CO)3-TPPS4 complex system in the substrate and isolated from the substrate for radioactivity count. Then 99mTc(CO)3-TPPS4 complex system was intravenously injected in hepatoma-bearing mice and directly injected in tumor tissue of the mice. Mice were photographed using SPECT. Labeling yields of 99mTc(CO)3-TPPS4 were more than 90% at pH = 7–8, 30 min, in a boiling bath, and it was stable for at least 14 h at pH = 2–8, rt ~95 °C. The uptake of 99mTc(CO)3-TPPS4 in HepG2 tumor cells was only 3–4% with the maximum uptake-time of 20 min. The SPECT images of hepatoma-bearing nude mice showed no uptake or little retention of 99mTc(CO)3-TPPS4 in the tumor tissue. Then the differences between 99mTc(CO)3-TPPS4 and TPPS4 were analyzed by fluoroscopy and molecular structure. It was found that the paper chromatography, HepG2 tumor cell uptake and the optimized porphyrin ring conformation of 99mTc(CO)3-TPPS4 were quite different from those of TPPS4. It was indicated that 99mTc(CO)3-TPPS4 had no uptake or little retention in hepatic tumors, unlike those biological behaviors of TPPS4. This may be due to the modification of porphyrin ring conformation of TPPS4 by 99mTc(CO)3 core.

Genetic diversity and structure of blue whales (Balaenoptera musculus) in Australian feeding aggregations

2010 ◽  
Vol 11 (6) ◽  
pp. 2437-2441 ◽  
Author(s):  
Catherine R. M. Attard ◽  
Luciano B. Beheregaray ◽  
Curt Jenner ◽  
Peter Gill ◽  
Micheline Jenner ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Balaenoptera Musculus ◽  
Genetic Diversity And Structure ◽  
Blue Whales

scholarly journals “Life is Much More Difficult to Manage During Periods”: Autistic Experiences of Menstruation

2020 ◽  
pp. 751-761
Author(s):  
Robyn Steward ◽  
Laura Crane ◽  
Eilish Mairi Roy ◽  
Anna Remington ◽  
Elizabeth Pellicano
Keyword(s):  
Online Survey ◽  
Negative Impact ◽  
Preliminary Investigation ◽  
Developmentally Disabled ◽  
Systematic Research ◽  
Negative Events ◽  
Disabled Women ◽  
Significant Negative Impact ◽  
And Behavior ◽  
Experiences Of Women

Abstract Starting from the assumption that menarche and menstruation are overwhelmingly negative events for developmentally disabled women, Steward et al. conduct much-needed research focusing on the experiences of women with autism. This preliminary investigation is a brief online survey on post-menarcheal autistic (n=123) and non-autistic (n=114) respondents. Although autistic respondents report many overlapping issues and experiences with non-autistic respondents, they also highlight distinct—and sometimes distressing—issues relating to menstruation, especially a cyclical amplification of autistic-related challenges, including sensory differences and difficulties with regulating emotion and behavior, which have a significant, negative impact on their lives. These initial findings call for systematic research on the potential causes, correlates, and consequences of menstrual-related problems in autistic individuals—across the spectrum and the lifespan.

scholarly journals Survival of adult blue whales Balaenoptera musculus in the Gulf of St. Lawrence, Canada

2006 ◽  
Vol 319 ◽  
pp. 287-295 ◽  
Author(s):  
C Ramp ◽  
M Bérubé ◽  
W Hagen ◽  
R Sears
Keyword(s):  
Balaenoptera Musculus ◽  
Blue Whales
Sign in / Sign up

Export Citation Format

Share Document