Catfish Lecture

Catfish Lecture - and streamlined body ± Most with stout...

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Ostariophysian Fishes: Minnows, Characins, and Catfishes A huge group with only a few marine representatives including milkfish and marine catfishes Ostariophysian Fishes ± 6500+ spp, mostly freshwater ± Includes minnows, catfishes, and characins ± Common features include: Schreckstoff , distinctive breeding tubercles, structure of swimbladder, and abdominal pelvic fins ± More advanced forms have Weberian apparatus (not in Gonorynchiformes) ± Bones connect swimbladder to inner ear Gonorynchiformes ± Two marine families: Chanidae ± Milkfish, Chanos chanos , are important food fish in SE Asia, reared in fresh and brackish ponds, tolerant of widely ranging temperature and salinity ± Mousefish, G. gonorynchus , is Indo- Pacific marine sp with eel-like body, found on sandy bottoms Chanos chanos -- Milkfish Siluriformes--Catfishes (2600+ spp) ± Distinctive morphology, whiskery snout, small eyes, flattened head, adipose fin,
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Unformatted text preview: and streamlined body ± Most with stout, locking spines leading dorsal and pectoral fins, many with venom glands ± Sensitive hearing and taste (including taste buds on skin, fins and barbels) ± Well adapted for activity at night or in turbid water Two Families of Marine Catfishes ± Ariidae (sea catfishes) and Plotosidae (eeltail catfishes) + migratory pangasiids ± Sea catfishes, 20 genera, 120 spp, marine, tropical and subtropical • Noisy schools, males are mouth brooders ± Eeltail catfishes, 8 genera, 30 spp, marine, brackish, and freshwater, Indian Ocean and western Pacific • Colonized fresh water in Australia, etc Gafftopsail catfish-- Bagre marinus Lessons from Catfishes ± Their superb sense of hearing and well-developed sense of taste make vision of secondary importance ± This reflects a frequent lack of water clarity in their habitats...
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This note was uploaded on 09/13/2010 for the course OCS 4012 taught by Professor Baltz,d during the Spring '08 term at LSU.

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Catfish Lecture - and streamlined body ± Most with stout...

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