15-Ostariophysi_web

15-Ostariophysi_web - Otocephala Part 2 Ostariophysi Lec 14...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Otocephala Part 2: Ostariophysi Lec 14 – DOF 6, 14 Monday Diversity lab, you need to know every family of fish found in Louisiana based on Douglas. Send me your species description via e-mail by class time. How is this tree different from last time? Otocephala (Teleostei) Phylogenetic analysis of complete mtDNA genomes Inoue et al. 2002 Otocephala Phylogeny Ostariophysi (= Otocephala - ?) Ostariophysi (Teleostei:Otocephala) • Anotophysi • Gonorhynchiformes (37 spp.) • Otophysi • Cypriniformes (3268 spp.) • Characiformes (1674 spp.) • Siluriformes (2867 spp.) • Gymnotiformes (134 spp.) Very diverse: morphologically diverse and species rich Nearly 8000 spp. (29% of all teleosts) Ostariophysi (Teleostei:Otocephala) Include milkfish, minnows, carps, barbs, suckers, loaches, piranhas, tetras, catfishes, electric eels 68% of all freshwater fishes are Ostariophysans Two major lineages the Anotophysi and Otophysi Ostariophysi (Teleostei:Otocephala) Alarm substance is given off when specialized dermal club cells are ruptured, as when a predator bites down on a prey fish. Nearby individuals of closely related taxa, sense the chemical in the water and take a variety of coordinated escape actions, depending on the species Synapomorphy of Ostariophysi Schreckstoff (Alarm Substance) Synapomorphy – Unique Alarm Response Schreckstoff - alarm substance that is produced Schreckreaktion - Unique alarm reaction– to Schreckstoff Ostariophysi (Teleostei:Otocephala) Chaca chaca May explain why lots of these species school. Why? Schreckstoff (Alarm Substance) Ostariophysi (Teleostei:Otocephala) • Anotophysi • Gonorhynchiformes (37 spp.) • Otophysi • Cypriniformes (3268 spp.) • Characiformes (1674 spp.) • Siluriformes (2867 spp.) • Gymnotiformes (134 spp.) Gonorhynchiformes (Ostariophysi:Anotophysi) • 37 spp. • Chanidae (milkfishes), Gonorhynchidae, Kneriidae, Phractolaemidae • Marine and freshwater • Sister to all remaining Ostariophysans Chanidae (Anotophysi: Gonorhynchiformes ) • 1 spp., Chanos chanos • Popular Asian food fish, sport fish Gonorynchidae;Kneriidae;Phractolaemidae (Anotophysi: Gonorhynchiformes ) • 36 spp. in total for the three families • Somewhat odd internal, external morphologies • Gonorynchidae (Indo-Pacific marine), others freshwater African Hence they are called...
View Full Document

This note was uploaded on 09/13/2010 for the course BIOL 4145 taught by Professor Chakrabarty during the Fall '09 term at LSU.

Page1 / 79

15-Ostariophysi_web - Otocephala Part 2 Ostariophysi Lec 14...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online