8003

• UCREFRP Catalog Number: 8003
• Author: Haynes, C. M. and R. T. Muth.
• Title: Identification of Habitat Requirements and Limiting Factors for Colorado Squawfish and Humpback Chubs ‎(January 1, 1981 to June 30, 1982)‎.
• USFW Year: 1982.
• USFW - Doc Type: SE-3-4,
• Copyright Material: NO

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IV. F
A.
B.
C.
D.
E.
in ray counts (principal fin rays only)
Caudal (C)
Dorsal (D)
Anal (A)
Pectorals (P1)
Pelvics (P2)
V. Oblique measures
A. Most posterior edge of opercle or origin of anal fin (POP to OA)
B. Origin of anal fin to posterior margin of hypural plates (OA to PHP)
VI. Depths
A. Immediately behind posterior margin of eye (BPE)
B. Origin of pectoral fins (OP 1)
C. Origin of dorsal fin (OD)
D. Immediately behind posterior margin of vent (BPV)
E. Anterior margin of posteriormost myomere (AMPM)
F. Maximum width of yolk (Max. Y)
G. Middle of eye (ME)
H. Least depth of caudal peduncle
VII. Calculated characters
A. Eye diameter = posterior margin of eye - anterior margin of eye (PE-AE)
B. Head length = anterior margin of snout to origin of pectorals (OP2-OP1)
C. Pectoral fin length anterior margin of snout to origin of pectoral fins
[P1 length (AS to OP2 - AS to OP1)]
D. ...Pelvic fin length anterior margin of snout to origin of pelvic fins -
anterior margin of snout to origin of pectoral fins ~P2 length
(AS to OP2 - AS to OP1)~
E. Origin of anal fin to posterior margin of hypural plates posteriormost
edge of opercle to origin of anal fin (OA-PHP POP-OA)
F. Anterior margin of snout to anterior margin of fork of caudal fin
anterior margin of snout to posterior margin of fork of caudal fin
(AS to AFC AS to PC)
G. Anal fin basal length = anterior margin of snout to origin of anal
fin (IA-OA)
H. Snout length = anterior margin of snout to anterior margin of eye (AS-AE)
I. Dorsal fin basal length = anterior margin of snout to insertion
or dorsal fin - anterior margin of snout to origin of dorsal fin (ID-OD)
J. Sum of fin lengths (including caudal)
Total number of morphomeristic characters to be used for analysis of
larval/juvenile humpbacks, roundtails, bonytails, and genetic crosses = 57.
The number of characters vary according to developmental phase i.e.
protolarvae - 30, mesolarvae - 54, metalarvae - 50, and juvenile - 47.