PIKA, COLLARED

 Under Construction May 2011

COLLARED PIKA

Ochotona collaris

GUARD HAIR

Length: 30-50mm (ASM #1)

Diameter Range: up to 55 microns (ASM #1)

Medullary Index: 0.86 (ASM #1)

Medulla: Compounded but with no pattern like rabbits and hares?  More like a zipper.  Medulla seems to be almost the entire width of the hair?  (ASM #1)

Color:  Color band is in the shield (Moore et al 1974), Banded grey/black/white (ASM #1) 

Scales: Stacked crowns with comblike shaped scale margins.  Pulling the hair out of the Duco was difficult, hair broke easily. (ASM #1)

UNDERFUR

Length: 10-20mm (ASM #1)

Diameter Range: around 7-15 microns (ASM #1)

Medullary Index: 0.8 – 0.85

Medulla: Uniserial ladder, very wide.  There may be intermediate sized underfur hairs as well.

Color: No obvious color microscopically, but some of the medulla cells look like groups of tiny balls with light centers.

Scales: Looks like stacks of crowns with long blunt tines. Pulling the hair out of the Duco was  difficult, hair broke easily. (ASM #1)

Macro Qualities: Both sexes have a gray or buff coat with hairs turning slate-colored at the base (Rearden 1981).  Almost tail-less.  Large round ears.  Distinct gray patch on shoulder and neck forms the collar, and the chest and stomach are white  (ADF&G 2008).

Cultures:

Notes: ASM #1 is courtesy of the American Museum of Natural History AMNH catalog number 127808.

Troubleshooting: Hairs were delicate and difficult to pull out of the Duco when making scale casts, and it was hard to say which hairs were the guard hairs as they are all so fine.

Range: Mostly south central and central Alaska (MacDonald and Cook 2009) Mostly high elevations (ADF&G 2008).

Names: Order Lagomorpha (the lagomorphs)  Rock rabbit, coney, little chief hares (ADF&G 2008). 

Advertisements

Post a Comment

Required fields are marked *

*
*

%d bloggers like this: