gill rakers

gill rakers

any bristle-like projections from the GILL ARCHES.
References in periodicals archive ?
The diacritically meristic counts were listed as follows: first dorsal fin with a single small isolated spine anteriorly; gill rakers 2-3+4-6=6-9; pored lateral line scales 73-80 and caudal fin with a yellow marking on the middle when fresh.
Herein we extend our study of the same pleuronectiform taxa by presenting the results of our examination of the gill rakers, jaw teeth and the teeth of the pharyngeal tooth plates, aspects previously not studied but potentially useful for the investigation of taxonomy, phylogeny and diet.
1a Large ocellus present in posterior portion of dorsal fin (between 22nd to 27th dorsal-fin spines); dorsal fin wholly of spines Paraclinus integripinnis (Labrisomidae) 1b No ocellus in dorsal fin as above; dorsal fin with both spines and soft-rays 2 2a Greatest body depth into total length more than 10 times; more soft-rays than spines in dorsal fin Chaenopsis alepidota (Chaenopsidae) 2b Greatest body depth into total length less than 8 times; more spines than soft-rays in dorsal fin 3 3a Maxillary extending well behind eye 4 3b Maxillary not extending behind eye 6 4a Supraorbital cirri divided from base; no large ocellus in center of membrane between 1st and 2nd dorsal spines; total gill rakers 18-22; head length 4.
The number of soft rays of the second dorsal fin, the left pectoral fin and of gill rakers of the first left gill arch were counted.
These species, all of which are slow-growing and produce few young, are at risk of over-exploitation due to commercial trade for their shells, fins, gill rakers, or meat.
We augmented the meristics used by previous authors with counts of dorsal-fin spines, of branched and unbranched pectoral-fin rays on both sides of the fish, of transverse lateral scale rows, and of posterior and anterior gill rakers from the left side of the fish.
Adjacent to their gills, they have a thicket of gill rakers that they use to extract phytoplankton and decaying biological detritus.
Diagnosis: Dorsal rays XI,9 (1 female paratype with XI1,9); anal rays 111,9; pectoral rays 15; lateral line scales 17+7; median predorsal scales 5; horizontal rows of scales on cheek 2; gill rakers 13-15; body depth 2.
This diet shift can be due to an increase in the gill raker spacing or short gill rakers, the changes in the gill raker morphology of C.
stomias); and (2) number of gill rakers on the 1st and 2nd branchial arches (A.
The gill rakers are cartilaginous or bony structures that project to the inside of the pharyngeal cavity and whose structure changes according to the feeding habit of the fish.
However, the knobbly gill rakers of robustus are an adaptation to an omnivorous diet, which is in contrast to the long spiky gill rakers of a specialised piscivore, such as bass.