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Author Topic: New developments in the field of science  (Read 447406 times)

T40cfr403

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Re: New developments in the field of science
« Reply #585 on: August 18, 2016, 07:36:43 PM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
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T40cfr403

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Re: New developments in the field of science
« Reply #586 on: August 18, 2016, 07:40:55 PM »
'Baby, it's hot outside': Why birds sing to eggs (I don't know about this... Always suspicious when researchers don't at least postulate some kind of mechanism, which they don't here. And what if it's cold outside? Do hatchlings come out big, fat and sassy?  :-\)

http://phys.org/news/2016-08-baby-hot-birds-eggs.html?utm_source=nwletter&utm_medium=email&utm_campaign=daily-nwletter

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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #587 on: August 19, 2016, 04:16:01 PM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #588 on: August 19, 2016, 04:17:05 PM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #589 on: August 19, 2016, 07:35:10 PM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #590 on: August 20, 2016, 01:09:46 PM »
Quote from: T40cfr403 on August 09, 2016, 12:22:48 AM
A Troubling Snag in the Comeback of the California Condor

http://www.wired.com/2016/08/troubling-snag-comeback-california-condor/

Contamination from marine mammals may hamper recovery of California condors

http://phys.org/news/2016-08-contamination-marine-mammals-hamper-recovery.html?utm_source=nwletter&utm_medium=email&utm_campaign=daily-nwletter

Research paper: Terrestrial Scavenging of Marine Mammals: Cross-Ecosystem Contaminant Transfer and Potential Risks to Endangered California Condors (Gymnogyps californianus)

http://sci-hub.cc/10.1021/acs.est.6b01990



More info: The Food That Once Saved Condors May Now Be Poisoning Them

https://www.nrdc.org/onearth/food-once-saved-condors-may-now-be-poisoning-them

Abstract: Dietary controls on extinction versus survival among avian megafauna in the late Pleistocene

https://www.researchgate.net/publication/249521130_Dietary_controls_on_extinction_versus_survival_among_avian_megafauna_in_the_late_Pleistocene

The IUCN Red List of Threatened Species(tm): Gymnogyps californianus - http://www.iucnredlist.org/details/22697636/0

Quote: "The drastic population decline during the 20th century is principally attributed to persecution and accidental ingestion of fragments from lead bullets and lead shot from carcasses (C. N. Parish in litt. 2012), resulting in lead poisoning. Lead poisoning remains a key threat for released birds (Kelly et al. 2014) and has caused many fatalities and resulted in the treatment of many more birds (Anon. 2001, Parish et al. 2007, Walters et al. 2010)."

California Condor Recovery Program: https://www.fws.gov/cno/es/calcondor/Condor.cfm

DDT - A Brief History and Status: https://www.epa.gov/ingredients-used-pesticide-products/ddt-brief-history-and-status

Book: DDT, DDD, and DDE in birds - https://pubs.er.usgs.gov/publication/5210753

Abstract: Eggshell Thinning and Depressed Hatching Success of California Condors Reintroduced to Central California

http://www.bioone.org/doi/abs/10.1525/cond.2013.110150

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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #591 on: August 22, 2016, 07:26:48 PM »
« Last Edit: August 22, 2016, 07:32:16 PM by T40cfr403 »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #592 on: August 23, 2016, 06:49:51 AM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #593 on: August 25, 2016, 11:07:33 AM »
The Saltmarsh Sparrow Is Creeping Dangerously Close to Extinction

http://www.audubon.org/news/the-saltmarsh-sparrow-creeping-dangerously-close-extinction

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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #594 on: August 25, 2016, 11:16:22 AM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #595 on: August 25, 2016, 11:18:22 AM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #596 on: August 25, 2016, 11:20:53 AM »
Golden eagles may be more abundant in undeveloped, elevated landscapes

http://phys.org/news/2016-08-golden-eagles-abundant-undeveloped-elevated.html

Paper: Modeling Late-Summer Distribution of Golden Eagles (Aquila chrysaetos) in the Western United States

http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0159271

« Last Edit: August 25, 2016, 11:23:40 AM by T40cfr403 »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #597 on: August 25, 2016, 09:36:34 PM »
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #598 on: August 25, 2016, 10:22:43 PM »
This feels like an important paper, to me, even if it's not about eagles and didn't include any testing for organic chemicals like DDE or flame retardants, for example. If you're game, you can read the Discussion section of the paper for more insight into the authors' conclusions.

Variation in egg size, shell thickness, and metal and calcium content in eggshells and egg contents in relation to laying order and embryonic development in a small passerine bird

http://sci-hub.cc/10.1642/AUK-16-16.1

ABSTRACT

Although there are quite a number of studies examining the effect of egg laying order on the levels of elements and various chemical substances, none have taken into account the presence or absence of embryonic development in the eggs. In this study, we measured the morphometry (length, breadth, volume, and mass), shell thickness, and concentrations of calcium and 10 other metals (including 8 essential elements: chromium, copper, nickel, manganese, iron, cobalt, zinc, and magnesium; and 2 nonessential  elements: lead and cadmium) in the shells and contents of embryonated and nonembryonated eggs across the laying order of Eurasian Reed-Warblers (Acrocephalus scirpaceus).

We found a significant increase in egg volume in both nonembryonated and embryonated eggs, and an increase in egg length and  mass in embryonated eggs, with laying order. Analysis confirmed significant differences related to laying order between nonembryonated and embryonated eggs in the concentrations of elements measured in shells (Cu, Cd, Pb, Mn, Fe, and Zn) and egg   contents (Pb). Analysis of the relationships between laying order and concentrations of elements revealed a significant increase in Mg and Ca concentrations in the shells of embryonated eggs, and a significant decrease in Ni in the contents of nonembryonated eggs and in Cu, Cd, Mn, and Co in the contents of embryonated eggs. Our results indicate that laying order and the presence of an embryo are critical factors responsible for variation in some features of egg morphometry and element concentrations in eggshells and egg contents. These factors should therefore be taken into consideration in studies of the chemistry and morphometry of avian  eggs.
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring

T40cfr403

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Re: New developments in the field of science
« Reply #599 on: August 27, 2016, 08:46:08 PM »
Help! I've used up my free allowance of 3 articles from this subscription service and need a volunteer to get an email copy of this article about California condor research.

"Colorado State University to Receive $95763 from Interior"

Targeted News Service (subscription)
"Within California there have been two condor flocks for the past decade, separated by >1000 miles2 of vacant historical range. However, long-range ..."

When I click on the story's URL, it redirects me to the subscription site (link below). The form is quick and easy to fill out and I've never had any problems with them (e.g., no spam or malware).

http://targetednews.com/display_story.php?s_id=1273905

If you're willing to do this, please leave a note on this thread so we don't slam them with requests. Unless you all want your own copy, of course!  ;D
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Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.
― Rachel Carson, Silent Spring