Fluffy Butt Acres: Stories of our flock

[rural mouse]

Crazy feather patterns! Yes genetics are a lot of fun.

What is a BCM.

Black Copper Marans

 

[Ponypoor]

OK got some more information, but do the "nm" numbers in the "photoreceptors" section in the table below correlate with light frequency that we think they can see?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653414/
@RoyalChick

Table 1​

Comparative Anatomy

​	Gallus gallus Chickens​	Humans​	References​
​
Relative Size​	50% of cranial volume occupied by orbit	5% of cranial volume occupied by orbit	(Waldvogel, 1990)​
​
Cornea​	Diameter: 9.1mm Thickness: 405µm 5 layers with true Bowman's layer Assists with accommodation	Diameter: 11.5–12.5mm Thickness: and 518–558µm 5 layers with true Bowman's layer Does not assist with accommodation	Chicken: (Fowler et al., 2004; Glasser et al., 1994; Jones et al., 2007; Kanski, 1994; Richey et al., 2011)​
Human: (Grewal et al., 2010; Rüfer et al., 2005)​
​
Sclera​	Scleral ossicles present Contains hyaline cartilage 2 layers, fibrous and cartilaginous	No scleral ossicles No hyaline cartilage layer	(Coulombre and Coulombre, 1973; Koch, 1973; Rada et al., 1991)​
​
Choroid​	Multi-layered, loosely cellular, and highly vascular tissue 250 µm mean global thickness	Multi-layered, loosely cellular, and highly vascular tissue Approx. 200 µm peripapillary thickness	Chicken: (Jones et al., 2007; Koch, 1973; Nava et al., 2016; Wood, 1917)​
Human: (Ho et al., 2011)​
​
Iris​	Striated muscle	Smooth muscle	(Koch, 1973)​
​
Lens​	Thickness: 3.5 mm Anterior Radius of curvature: 5.9 mm	Thickness: 3.9 mm Anterior Radius of curvature: 10.5 mm	Chicken: (Iribarren et al., 2014; Samuelson, 1991)​
Human: (Schachar, 2004)​
​
Photoreceptors​	LWS (571 nm), RH2 (508 nm), SWS2 (455 nm) SWS1 (415 nm), cone opsins* RH1 rod opsin Double cone present 3:2 cone to rod ratio overall Oil droplets present in cones Rod-free area centralis for highest visual acuity with highest cone density (approx. 15,000 to 36,000 cones/mm2) Approx. 350 µm thick at area centralis	2 LWS (L (558 nm), M (531 nm)), and SWS1 (419 nm) cone opsins** RH1 rod opsin No double cone 1:20 cone to rod ratio overall No oil droplets Rod-free fovea centralis for highest visual acuity with highest cone density (approx. 140,000 and 188,000 cones/mm2) Approx. 190 µm thick at fovea	Chicken: (Bowmaker, 2008; Bueno et al., 2011; Dartnall et al., 1983; Hart, 2001; Headington et al., 2011; Kram et al., 2010; Meyer and May, 1973; Nava et al., 2016; Okano et al., 1992)​
Human: (Bowmaker, 2008; Curcio et al., 1990; Jonas et al., 1992; Kashani et al., 2010; Okano et al., 1992; Wells-Gray et al., 2016)​
​
Optic Nerve and Inner Retina​	Pecten oculi limits optic nerve head visualization Lamina cribrosa present Approx. 2.4 million ganglion cells in inner retina NIRG*** cell Bullwhip neuron	No pecten oculi Lamina cribrosa present Approx. 700,000 – 1.5 million ganglion cells in inner retina Unknown if NIRG cell (NIRG is present in nonhuman primates) Unknown if Bullwhip neuron	Chicken: (Fischer et al., 2005, 2010a, 2010b; Morcos and Chan-Ling, 2000; Rager and Rager, 1978)​
Human: (Curcio and Allen, 1990).​
​
Vasculature​	Retina is avascular Pecten oculi supplies nutrition and oxygen to inner retina via diffusion through the vitreous Choriocapillaris supplies outer retina	Retinal artery supplies the inner retina No pecten oculi Choriocapillaris supplies outer retina	(Jones et al., 2007; Waldvogel, 1990)​

Very interesting comparison with human ocular anatomy

 

[bgmathteach]

OK got some more information, but do the "nm" numbers in the "photoreceptors" section in the table below correlate with light frequency that we think they can see?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653414/
@RoyalChick

Table 1​

Comparative Anatomy

​	Gallus gallus Chickens​	Humans​	References​
​
Relative Size​	50% of cranial volume occupied by orbit	5% of cranial volume occupied by orbit	(Waldvogel, 1990)​
​
Cornea​	Diameter: 9.1mm Thickness: 405µm 5 layers with true Bowman's layer Assists with accommodation	Diameter: 11.5–12.5mm Thickness: and 518–558µm 5 layers with true Bowman's layer Does not assist with accommodation	Chicken: (Fowler et al., 2004; Glasser et al., 1994; Jones et al., 2007; Kanski, 1994; Richey et al., 2011)​
Human: (Grewal et al., 2010; Rüfer et al., 2005)​
​
Sclera​	Scleral ossicles present Contains hyaline cartilage 2 layers, fibrous and cartilaginous	No scleral ossicles No hyaline cartilage layer	(Coulombre and Coulombre, 1973; Koch, 1973; Rada et al., 1991)​
​
Choroid​	Multi-layered, loosely cellular, and highly vascular tissue 250 µm mean global thickness	Multi-layered, loosely cellular, and highly vascular tissue Approx. 200 µm peripapillary thickness	Chicken: (Jones et al., 2007; Koch, 1973; Nava et al., 2016; Wood, 1917)​
Human: (Ho et al., 2011)​
​
Iris​	Striated muscle	Smooth muscle	(Koch, 1973)​
​
Lens​	Thickness: 3.5 mm Anterior Radius of curvature: 5.9 mm	Thickness: 3.9 mm Anterior Radius of curvature: 10.5 mm	Chicken: (Iribarren et al., 2014; Samuelson, 1991)​
Human: (Schachar, 2004)​
​
Photoreceptors​	LWS (571 nm), RH2 (508 nm), SWS2 (455 nm) SWS1 (415 nm), cone opsins* RH1 rod opsin Double cone present 3:2 cone to rod ratio overall Oil droplets present in cones Rod-free area centralis for highest visual acuity with highest cone density (approx. 15,000 to 36,000 cones/mm2) Approx. 350 µm thick at area centralis	2 LWS (L (558 nm), M (531 nm)), and SWS1 (419 nm) cone opsins** RH1 rod opsin No double cone 1:20 cone to rod ratio overall No oil droplets Rod-free fovea centralis for highest visual acuity with highest cone density (approx. 140,000 and 188,000 cones/mm2) Approx. 190 µm thick at fovea	Chicken: (Bowmaker, 2008; Bueno et al., 2011; Dartnall et al., 1983; Hart, 2001; Headington et al., 2011; Kram et al., 2010; Meyer and May, 1973; Nava et al., 2016; Okano et al., 1992)​
Human: (Bowmaker, 2008; Curcio et al., 1990; Jonas et al., 1992; Kashani et al., 2010; Okano et al., 1992; Wells-Gray et al., 2016)​
​
Optic Nerve and Inner Retina​	Pecten oculi limits optic nerve head visualization Lamina cribrosa present Approx. 2.4 million ganglion cells in inner retina NIRG*** cell Bullwhip neuron	No pecten oculi Lamina cribrosa present Approx. 700,000 – 1.5 million ganglion cells in inner retina Unknown if NIRG cell (NIRG is present in nonhuman primates) Unknown if Bullwhip neuron	Chicken: (Fischer et al., 2005, 2010a, 2010b; Morcos and Chan-Ling, 2000; Rager and Rager, 1978)​
Human: (Curcio and Allen, 1990).​
​
Vasculature​	Retina is avascular Pecten oculi supplies nutrition and oxygen to inner retina via diffusion through the vitreous Choriocapillaris supplies outer retina	Retinal artery supplies the inner retina No pecten oculi Choriocapillaris supplies outer retina	(Jones et al., 2007; Waldvogel, 1990)​

Yes, the nm refers to the wavelength - of light/and of light they see. This is similar to the info in paper link I posted. They can see a fair amount of the upper ultraviolet spectrum, but only a tad bit of the lower end of the infrared spectrum. So, @Ponypoor 's cameras with the infrared in the 900's, they can't see.

 

[Ponypoor]

Update

My sweet little Coco, she passed while I was in town.

My exam results will take 4-8 WEEKS to come. Blargh. I hope I did fine.

Sorry to hear that, chicks are really fragile, I many time am amazed they even survive at all.

Not sure of hens do a better job at raising them or if human raising is best.

 

[Ponypoor]

And they make me breakfast

My cat keeps my feet and legs warm while digging her nails into my leg

 

[Ponypoor]

Yes, the nm refers to the wavelength - of light/and of light they see. This is similar to the info in paper link I posted. They can see a fair amount of the upper ultraviolet spectrum, but only a tad bit of the lower end of the infrared spectrum. So, @Ponypoor 's cameras with the infrared in the 900's, they can't see.

My cams are 850nm which is a wavelength they also cannot see with, according to the link I posted. They can see the red LED lights on the camera but they will not be able to ‘see in the dark’ any better than I can.

Owww! Who left that wheelbarrow there?!

 

[Ponypoor]

Does this mean if I get the urge to comment on a old post it's fine to?

It’s a trip down memory lane

 

[BY Bob]

Update

My sweet little Coco, she passed while I was in town.

My exam results will take 4-8 WEEKS to come. Blargh. I hope I did fine.

I'm so very sorry.

 

[Ponypoor]

Well got the camera and realized its electric and screws in like a light bul. No problem I had hubby pic me up one of those cords with the light bulb screw in, took the plastic cage off and hooked it in the coop. Works fine, but then only works with 2g internet, no problem I have a 2g setup already for guests. Well the 2g stops working at the shed door lol. Now I had to order a wifi booster. Geez all this just to watch my chooks in the coop.

A wifi booster is not going to work. Get a wireless bridge and put that in the shed. You will then have internet out in the shed.

I would recommend a camera like Reolink or Foscam, or Swann. They have been around a long time and work great.

This is a Swann camera which works with my Reolink application. The chickies love Reenie’s stall as she leave all sorts of goodies to eat

This is a Reolink (this one is a Pan Tilt Zoom, 3 times zoom).

PM me if you want any technical assistance.

 

[BY Bob]

Does this mean if I get the urge to comment on a old post it's fine to?

Yes it does