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gill raker

   Also found in: Wikipedia 0.01 sec.
gill raker [′gil ‚rāk·ər]
(vertebrate zoology)
One of the bony processes on the inside of the branchial arches of fishes which prevents the passage of solid substances through the branchial clefts.


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5" appearing in the scale row count above and below the lateral line refers to a small truncated scale at the respective bases of the dorsal and anal fins; gill raker counts include all rudiments and are presented as separate counts for the upper and lower limbs as well as a combined count; the last fin ray element of the dorsal and anal fins is usually branched near the base and is counted as a single ray.
Among morphometric characters of specimens with all characters, snout length, suborbital depth, gill raker length, body depth at analfin origin, body depth at anal-fin insertion, dorsal-fin spine 1 length, dorsal-fin spine 4 length, pectoral-fin ray length, pelvic-fin ray length, pelvic-fin spine length, anal-fin spine 1 length, anal-fin spine 2 length, anal-fin spine 3 length, preanal length, and soft-dorsal-fin base length differed significantly between S.
They differ from kings, silvers, and pink salmon by the lack of large black spots, and they differ from chum salmon by having more gill rakers on the first gill.
 
 
 
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