Eagles - Science topic

I see there are plenty of corrective methods in children, but I am finding nothing in older adults diagnosed late in their 50s/60s. Can anyone help?

Over the last few years, I have observed some species apparently "disoriented" by the very hot and dry autumns in central Italy. In particular golden eagles in courtship or very territorial flights and corvids species bringing twigs to used nests (or new nesting sites). Do you have any studies you can tell me about similar behaviors? The causes? Some believe it is due to "false estrus", or the hormonal response that autumn temperatures similar to spring temperatures could cause. What do you think about this?

Right now I'm investigating thin NiOx deposited by hollow cathode gas flow sputtering. To accuratly check for the influence of p(O2) on lattice parameters i decided to work with TOPAS (Bruker).

The films are 80 nm NiO on Corning Eagle XG.

My measurements are carry out on a Bruker D8 Discover with cupper-cathode in GID geometry at incident angle of 1°: goniometer radius=430mm, PSD-window=1.9119°. On primary side a Göbel-Mirror and a 0,2 mm Slit are mounted on the secondary side only a parallel plate collimator (Equa. Soller 0.4°).

My question now: How does my emssion line profile must look? (since I use a goeble mirror it cuts kB, and parts of ka2 and also distorts with angle) I could find accurate values, or suggestions on this.

And how to simulate the fixed Omega (incident angle)? I do not use zero-correction or hight offset, since I'm in GID.

2 Phases is accurate i guess: one for SiO2 (Substrate) and one for my film. The Cubic lattice is not able to recreate all peak positions. Therefore I use rhom. NiO (ICDD 00-044-1159)

Please have a look on the attched files.

Thanks in advance!

I am planning to conduct a study on evaluating the financial performance of banks using eagles model. It seems that not many have conducted studies using that method but the majority are using camels model.

Could anybody please direct me to papers that used eagles model.

Thanks

I am trying to perform a biofilm assay using the yeast Cryptococcus neoformans but in the protocol I found they use Dulbecco’s modified Eagle media (DMEM) which, I do not have. I have been trying to find the composition but has been impossible so far. Is this broth rich or minimal media? Which kind of media can I use instead? Thanks in advance!

Currently a student new to cell culture techniques.

Whenever I see reagents in protocols I don't know what most of them mean:

Why Dulbecco’s modification of Eagle’s Basal Medium (DMEM) is used for this cell?

Why cells are grown at 5% CO2?

Why is EDTA added to trypsin?

Why fibronectin is used instead of Laminin in PBS?

I see all these culturing protocols and there's no mention as to why a reagent is added and I cannot find any material for stuff like this

I have found two different IC50 values of an inhibitor for the same cell line with same cell confuence when they were cultured in two different media : Iscove's Modified Dulbecco's Media + 15% FBS and Dulbecco's Modified Eagle's Media + 10% FBS. The inhibitor seems to work better in DMEM than IMDM. What can be the reason behind this? They seem to have similar effect on the proteins (compared by western blot), but a difference (almost twice effect) is only seen in the cell proliferation assay (MTS).

Dear colleagues,

I'm trying to quantify influence of bear predation on the Steller's Sea Eagle nestlings. This factor is one of main causes of nesting failure: about 20% of eagle offspring is depredated by brown bears. Other causes together are responsible for about 10% of offspring loss, referred as nestling mortality. Simply speaking, there are three possible nestlings fates: fledged, depredated, died from other causes.

The question is, how to calculate correctly sea eagle productivity loss due to bear predation. I see two possible ways.

1. Ratio of the number of depredated nestlings to the number of all nestlings

However, in this case the loss by predation would correlate to the N_died: the more nestlings die from other causes, the less will be the loss by predation.

2. Another option is to exclude dead nestlings from the index:

Now the index does not correlate with N_died, but it seems a bit complex and counterintuitive. For example, let's suppose that we have 99 nestlings, 33 of which successfully fledged, 33 were depredated and 33 died. The first index Loss₁ = 1/3. However, the Loss₂ = 1/2, which means that if no predation occurs, 66 nestlings would fledge, and bear predation reduces this number by 50%.

Which of the indices, on your opinion, is more relevant, or maybe it depends?

Dear colleagues,

We are working in a general study to assess the viewpoints of raptor researchers about raptor conservation across the world.

We would like to ask you to fill out an online survey. It will take you a few minutes but we think the results may help us to focus on different aspects of raptor conservation worldwide. Please, we also encourage you to share it with other researchers that could be interested in the topic.

We divided the survey in four, one focused on Old World and New World vultures, one focused on the remaining Accipitridae (Hawks, Eagles, Kites, Harriers, etc.), another is focused on Falconids (Falcons and Caracaras), and finally one focused on owls. All four surveys are very similar but have small differences. We suggest you complete the ones of the groups that you know better, but if you work with different groups and want to complete more than one group it's ok.

Old World and New World vultures https://forms.gle/iu8uDsDKyAMgFQ5c6

Hawks and eagles https://forms.gle/xT8nVf9M1sEJ8THJ9

Owls https://forms.gle/vD1kjdJYmfVatX2w9

The survey will be open between 01th October and 01th December 2019.

Many thanks to all of you,

Santiago Zuluaga Ph.D(s) and Juan M. Grande PhD.

INCITAP- CONICET / CECARA-FCEyN-UNLPam

I'm looking for information on tree nesting behavior associated with golden eagles (aquila chrysaetos canadensis) and conifer dominated habitats. Golden eagle nesting behavior in tree dominated conifer habitats is poorly understood. I'm still searching but so far I've only found one paper from Martin Tjernberg on conifer nesting behavior of golden eagles in sweden, and I'm still trying to access the whole pdf. It appears tree-nesting is better understood in more open canopy habitats with large hardwoods (live oak) or pine species. I would like to potentially research nest tree characteristics and home range characteristics around these sites in northern coastal California and possibly more inland. Humboldt Redwood company also put together a simple powerpoint presentation back in 2012. And although it did contain some level of statistical analysis, it was based on a very small sample size (4 nests I believe). Please feel free to provide any helpful references or advice. Or if you just wanna chat about birds. Let's discuss.

My aim is to estimate mortality rates of some eagles on the base of survival tables. The good toll for this is Weibull aging model (see Ricklefs, 2000, page 104 in attachment). According to Ricklefs, the survivorship curve follows the equation

l_x = exp( -m₀x - (alpha * x^{beta + 1})/(beta + 1)),

where x is age, l_x is the proportion of population surviving to the age x, m₀ is the initial (accidental) mortality, alpha and beta are coefficients connected to the rates of aging.

So, I have to fit 3 parameters of the model: m₀, alpha, and beta.

I ask you colleagues to help me with the correct way to do it. So far I've been using NLS (non-linear squares) method in R, and it basically works. However, the model fitting strongly depends on start values of parameters, that's why in some cases the model doesn't converge or comes to singularity.

All this prevents me to make a proper permutation test of my model (after some iterations of the nls function an exception arises and the loop breaks).

Ricklefs himself refers to 'maximum likelihood approaches' which he used to fit the model, but I do not exactly understand what specifically is it in the given context. Could anyone help me with the correct way to fit my data?

Thanks,

Michael

===========

Ricklefs, R.E., 2000. Intrinsic aging-related mortality in birds. Journal of Avian Biology, 31, 103–111.

I am looking for informations and experiences regarding the dawn calling activity of Eagle Owls in the context of a special conservation problem in Austria.

In relevant papers it is regularly mentioned that the calling activity of male Eagle Owls (song) in the dawn phase is comparable to the dusk phase. However, although there is an impressive amount of information about the dusk phase especially from Spain and France, I could not find precise information regarding the dawn phase (still, most surveys are based on dusk calling). In particular, I would need information about, e. g., start and end of calling before and after sunrise, call duration, detectability of existing territories which would help me to make a decision if to include controls in the dawn phase in addition to the dusk phase.

Many thanks in advance!

Hello,

It is nice to see new optimization algorithms inspired by birds! You might be interested by the following book chapter:

Thank you for sharing your research,

Jean-Baptiste Lamy

I have a DC-DC push-pull circuit with two mosfets. I will use DSPIC33CK64MP205 microcontroller and TC4427 mosfet driver to drive mosfet.

I am drawing the circuit at the Eagle software to get PCB layout. But i don't know the connections of pins.

For example, I will use PV panel, so to get MPPT I will use voltage and current values as a input of microcontroller. I know i will use ADC ports but actually i could not understand which pin is for ADC's.

Also i don't know if i need to use a resistor or capacitor or something else while connecting a pin to mosfet driver.

I am new to these things so any advice would be appreciated very much.

Is the PCB design files and schematic (along with related files telling PC fabs how the boards need to be created) generated by the Cadsoft Eagle free program.  In the world of open source hardware, it’s the most common standard in use.  Ironically, however, it isn’t open source software.  This isn’t optimal.  Also, the Eagle software is hard to learn and clumsy.  Hopefully someday an open source alternative will become available.

Are there papers or studies on conservation vs. conservation conflicts and how to avid and/or manage them? Here in Bulgaria we have at least two such conflicts, where actions to conserve one conservation dependent species are not in favour to other or even worse may further threaten it. For example conservation of the wolf in Bulgaria (especially legislation changes) could lead to illegal actions against wolf (e.g. poison baits use), which do not affect the wolf that much, but are absolutely dangerous to vultures and eagles. This conflict passes through the man-wolf conflict though. The other example is the conservation of the European Suslik (Spermophilus cittelus), which requires well grazed (even may be overgrazed) grasslands to recover and sustain and its conservation, restoration and abundance is fundamental for several other species (e.g. Saker Falcon, Imperial Eagle etc.), but the general nature lovers and botanists are against heavy grazing and keeping grassland in best condition for Susliks. So here is a Conservation-Conservation conflict. To may opinin it should be measured on the base of Conservation value of the species involved, which is not always the case e.g. managers of the Central Balkan National Park in Bulgaria. Any references, notes or discussion will be appreciated.

We are starting to research the impact of eletrocussion in Crowned Eagles in southern Brazil, but our inexperience in this topic associated with the need to investigate large areas makes us fear to do this in a wrong way, wasting time and resources.

We would like to request some suggestions on how you do the sample design and how the search for electrocuted animals occurs.

Every help is welcome!

Does anyone have records on harpy eagle for Costa Rica (with evidence)?

Alguien tiene registros de harpía para Costa Rica con evidencias?

I am currently doing my research on DNA barcoding of white bellied sea eagle using cyt b gene. I have tried picking primers from the cyt b sequences available in GenBank, but none matched the sequence. Could you please help me find the primers to amplify the cyt b gene of Haliaeetus leucogaster?

Hallo everybody,

This spring we have experienced a delayed  return migration of a number  satellite tracked Lesser Spotted Eagles (Aquila pomarina) (see www.satellite-telemetry.de) compared to other years. The birds started late to migrate in southern Africa, had a rather long stop-over period in Uganda/South Sudan (where they do not stop normally) and several of the tracked eagles (like many others not tracked) arrived 2-3 weeks late at the breeing sites in Germany, but also in other countries. Many of them did not breed. 

The same phenomenon was observed in some other years, e.g. in 1998 (see Meyburg et al.  2007, complete English translation is available from the author), but the difference was not so extreme.

At least in NE-Namibia, part of the wintering range, has been extremely dry this year, which most probably influenced the departure. Our paper on wintering of LSEs in this area has just been publised online in J. Avian Biol. (free access).

We wonder if other researchers tracking other birds of this and other species have observed a similar situation and  we also wonder if breeding success has been checked.

We also wonder if anybody has any idea what might be the reasons or how the problem could be investigated.

Best wishes

Bernd Meyburg

We have more than 8 species of raptors in our Rescue Center for treatment. Our observation shows that an eagle weighing more than 2 kg is more susceptible to Bumble Feet. We are providing them with different sized perches having various degrees of roughness. This has not been much help. What other measures would help?