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Gill raker

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rakers with secondary projections. Because gill raker characters often vary between closely related taxa, they are commonly used in the classification and identification of fish species. Much of the variation in gill raker morphology is thought to be due to adaptation to optimize the consumption of different diets.
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that compose the fleshy part of the gill used for gas exchange. Rakers are usually present in two rows, projecting from both the anterior and posterior side of each gill arch. Rakers are widely varied in number, spacing, and form. By preventing food particles from exiting the spaces between the gill
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The structure and spacing of gill rakers in fish determines the size of food particles trapped, and correlates with feeding behavior. Fish with densely spaced, elongated, comb-like gill rakers are efficient at filtering tiny prey, whereas carnivores and omnivores often have more widely spaced gill
141: 62:. Since an appreciable fraction of this material was nutritious, rakers subsequently evolved as food-trapping mechanisms in filter feeders. Gill rakers, when long and closely set, play the same role in suspension-feeding fish such as 156: 58:
To prevent the potentially damaging passage of solid material through the gill slits and over the gill filaments, early gill rakers strained large particles from the water and diverted them to the
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Bottom: Gill-rakers in cross section, showing angle at which hooks project from their point of attachment (water flow is downwards)
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Top left: Gill-rakers attached to the branchial arch, showing the projecting rows of hooks (×50)
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Salman, Nadir A.; Al-Mahdawi, Ghaith J. and Hassan; Heba, M.A. (2005).
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arches, they enable the retention of food particles in filter feeders.
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Bony or cartilaginous processes that project from the branchial arch
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597:Schreckstoff 582:Lateral line 498:Swim bladder 488:Spiral valve 417:hyomandibula 400:pseudobranch 379: 283:Hypoxia in - 164:. Retrieved 157:the original 152: 148: 135: 126: 117: 102: 80:whale sharks 57: 53: 34:in fish are 31: 30: 1307:WikiProject 1266:Prehistoric 1250:Threatened 941:Other types 838:Sardine run 813:Forage fish 793:Corallivory 645:Development 630:Bubble nest 503:physoclisti 493:Suckermouth 466:Root effect 288:Ichthyology 32:Gill rakers 922:Groundfish 917:Freshwater 912:Euryhaline 897:Coral reef 833:Salmon run 823:Paedophagy 725:Amphibious 712:Locomotion 520:pharyngeal 508:physostome 461:Photophore 407:Glossohyal 380:gill raker 363:dorsal fin 313:physiology 109:References 1171:chimaeras 1058:Predatory 1035:Salmonids 993:Whitefish 983:Poisonous 958:Diversity 892:Coldwater 828:Predatory 818:Migratory 778:Bait ball 761:behaviour 680:Pregnancy 675:Polyandry 449:papillare 444:Operculum 439:Meristics 385:gill slit 348:Cleithrum 278:Fish kill 268:Fear of - 261:- as food 251:Fisheries 236:Evolution 226:Diversity 72:megamouth 60:esophagus 1323:Category 1295:Category 1246:Smallest 1159:lampreys 1122:flatfish 1112:Demersal 1068:mackerel 1063:billfish 1003:Commerce 932:Tropical 907:Demersal 902:Deep-sea 858:Venomous 750:RoboTuna 700:triggers 695:Spawning 655:Juvenile 640:Egg case 273:FishBase 1241:Largest 1154:hagfish 1149:Jawless 1127:pollock 1100:sardine 1095:herring 1090:anchovy 1040:Tilapia 1030:Octopus 1025:Catfish 1012:Farming 927:Pelagic 887:Coastal 874:habitat 730:Walking 635:Clasper 587:Otolith 549:systems 547:Sensory 481:ganoine 456:Papilla 307:Anatomy 246:Fishing 166:2 March 86:in the 76:basking 64:herring 1259:sharks 1176:sharks 1105:sprats 1085:Forage 1073:salmon 953:Coarse 735:Flying 607:Vision 562:Barbel 476:Scales 336:dermal 216:About 84:baleen 68:mullet 1221:Blind 1209:Lists 988:Rough 853:Sleep 759:Other 525:shark 515:Teeth 160:(PDF) 145:(PDF) 82:, as 1254:rays 1188:Bony 1181:rays 1078:tuna 1020:Carp 978:Oily 963:Game 948:Bait 882:Cave 665:Milt 370:Gill 358:Fins 331:Bone 218:fish 209:Fish 168:2013 78:and 36:bony 1117:cod 872:By 685:Roe 412:Jaw 310:and 38:or 1325:: 153:31 151:. 147:. 125:. 101:, 90:. 74:, 70:, 66:, 201:e 194:t 187:v 170:. 129:.

Index


bony
cartilaginous
branchial arch
gill filaments
esophagus
herring
mullet
megamouth
basking
whale sharks
baleen
filter-feeding whales

orange-spotted grouper
"Respiratory system"
"Gill Rakers Morphometry and Filtering Mechanism in some Marine Teleosts from Red Sea Coasts of Yemen"
the original
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e
Fish
fish
Diversity
Ethnoichthyology
Evolution
Diseases and parasites
Fishing
Fisheries
Environmental impact of fishing

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