14. Chondrichthyes and Teleosts - 202. . Chondrichthyes and... · PDF fileReproduction in Chondrichthyes. 5/18/2012 4 BIO202 - 2012 Scharf

5/18/2012
1
BIO202 - 2012 Scharf
About 1000 species
Unchanged in last 200 MY
Nearly all marine
Shark populations threatened
VertebratesLiving Gnathostomes (jawed fishes)Cartilaginous fishes
(Class Chondrichthyes)
No bone (calcified cartilage)
Heterocercal tail
Paired pectoral and pelvic fins
Pelvic claspers in males
Placoid scales

5/18/2012
2
Exposed gill slits
No swim bladder
Retain high urea concentrations
Well-developed senses
Mostly carnivores
Olfactory organs
Mechanoreception with lateral line
Good vision
Attacks fine-tuned with electroreceptors
VertebratesFeeding in Chondrichthyes

5/18/2012
3
Internal fertilization
Types of maternal investment:1. Oviparity2. Ovoviviparity3. Viviparity
Intrauterine cannabalism oophagy
VertebratesReproduction in Chondrichthyes

5/18/2012
4
Dorsoventrally flattened
Large, fused pectoral fins
Dorsal spiracles for water intake
Pavement-like crushing teeth
Skates lay eggs in leathery case mermaids purse
Skeleton of bone (endochondral)
Presence of swim bladder or lungs
Gill cover = operculum
Two classes:1. Class Actinopterygii (ray-finned)
Modern bony fishes (teleosts)2. Class Sarcopterygii (lobe-finned)
VertebratesLiving Gnathostomes (jawed fishes)
Bony fishes (Osteichthyes)

5/18/2012
5
Teleost modifications:
Cycloid or Ctenoid scales
Homocercal tail
Fin morphology
Swim bladder
Jaw design
VertebratesRay-finned fishes (Actinopterygii)
Types of scales

5/18/2012
6
Types of caudal fins
Only 7 species; includes lungfish and coelacanth
Diphycercal tail
Muscular fins
Lungs and gills present
Lineage gave rise to tetrapods
VertebratesLobe-finned fishes (Sarcopterygii)

5/18/2012
7
Migration Diadromous fishes (anadromous vs.
catadromous) Spawning migrations Seasonal (temperature)
Respiration Gill filaments with plates containing
blood vessels Water flow opposite of blood flow
Reproduction External fertilization and oviparity
in most Large numbers of eggs Larvae carry yolk sac
VertebratesTeleost Function
Atlantic wolffish

5/18/2012
8

5/18/2012
9
New world record largemouth bass caught recently in California
25.1 pounds

5/18/2012
10
Worlds smallest fish (7.9mm) recently discovered in Southeast Asia peat wetlands

14. Chondrichthyes and Teleosts - 202. . Chondrichthyes and... · PDF fileReproduction in Chondrichthyes. 5/18/2012 4 BIO202 - 2012 Scharf

Text of 14. Chondrichthyes and Teleosts - 202. . Chondrichthyes and... · PDF fileReproduction in...

3/20/2015 Starter: Quiz 202 204 Sexual and Asexual Reproduction Sexual and Asexual Reproduction Sexual and Asexual Reproduction Sexual and Asexual Reproduction

DNA barcoding unveils skate (Chondrichthyes: Rajidae ...· (Chondrichthyes: Rajidae) species diversity

Chondrichthyes species in deep waters of the Mediterranean Sea*

Comparative transcriptomics of elasmobranchs and teleosts

The utricular otoliths, lapilli, of teleosts: their morphology and

Ultrastructural studies of the morphological variations of ...· INTRODUCTION Teleosts include more

Class Chondrichthyes Cartilaginous fishes - · Sharks Class Chondrichthyes gill slits instead

Neoselachian remains (Chondrichthyes, Elasmobranchii) from ...· Neoselachian remains (Chondrichthyes,

Unit 8.2 Class Agnatha, Chondrichthyes, & Osteichthyes

Physiological roles of tryptophan in teleosts: current ... 1 Physiological roles of tryptophan in teleosts:

A new Xenacanthiformes shark (Chondrichthyes ...· A new Xenacanthiformes shark (Chondrichthyes, Elasmobranchii)

Individual genetic tagging for teleosts: an empirical ... Individual genetic tagging for teleosts: an

Infraclass Teleostei: “Teleosts”  The vast majority of modern fishes are “teleosts.”  They have replaced the heavy, armored scales of their ancestors

Cartilaginous fishes Class Chondrichthyes. Marine Fishes Class Chondrichthyes – Cartilaginous fishes; with about 1000 different species, they include

FISHIES Classes: Agnatha, Chondrichthyes, and Osteichthyes

The caudal skeleton of basal teleosts, its conventions ... of basal extant teleosts demonstrate that

Chondrichthyes (1)

KINGDOM ANIMALIA Phylum Chordata Class Chondrichthyes

Toxic Components of the Diet of Teleosts

Class Chondrichthyes “Cartilaginous Fish” Kingdom: Animalia Phylum: Chordata Sub Phylum: Verterbrata Class: Chondrichthyes

Class : Chondrichthyes(Cartilagenous fishes ) Sub Class:Elasmobranchii Order:Selachii

Interrelationships of the Etmopterinae (Chondrichthyes, (Chondrichthyes, Squaliformes) SHIGERU SHIRAI

ContributiontotheTaxonomyandDistributionof SixSharkSpecies ... SixSharkSpecies(Chondrichthyes,Elasmobranchii)from

timing belts ... timing belts Siegling â€“ total belting solutions Ref. no. 202-2 07/13 UD Reproduction

Bio Presentation Chondrichthyes

Class Chondrichthyes

FISH PART TWO: AGNATHA CHONDRICHTHYES OSTEICHTHYES Phylum Chordata Subphylum Vertebrata

17. Class Chondrichthyes Notes

KINGDOM ANIMALIA Phylum Chordata Class Chondrichthyes

SHARKS AND RAYS (CHONDRICHTHYES, ELASMOBRANCHII) FROM .sharks and rays (chondrichthyes, elasmobranchii)