Smelt & Salmon Lecture

Smelt & Salmon Lecture - Smelt Salmon and Pike...

Info iconThis preview shows pages 1–2. 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 Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Smelt, Salmon, and Pike Superorder Protacanthopterygii Includes three orders of ‘original-spiny-fin’ fishes Superorder Protacanthopterygii A d i p o s e F i n A b d o m i n a l p e l v i c s w i t h a x i l l a r y p r o c e s s ¡ 310+ species ¡ “Soft rayed fishes” (Lack spines) ¡ Many possess an adipose fin (ex. galaxiids) ¡ Pelvic fins abdominal and low, scales cycloid, premaxillary not protractile, swimbladder connected to gut Orders Argentiniformes, Salmoniformes & Esociformes ¡ Order Argentiniformes are deepsea, smelt- like fishes ¡ O. Salmoniformes includes 7 families of freshwater, marine & diadromous spp • Suborder Salmonoidei: One family including salmon and trout, and whitefishes, and graylings • Suborder Osmeroidei: Six families of northern smelts, noodlefishes, & SH smelts ¡ O. Esociformes (pikes & mudminnows), 11 spp, confined to fresh water Argentiniformes--Deepsea Smelt ¡ 160+ spp in 7 families ¡ Some with large tubular eyes (& binocular vision), many rods for low light vision, prey on zooplankton silhouetted against surface light ¡ Silvery or black in color, may lack adipose fin ¡ A few have photophores ¡ Epibranchial (crumenal) organ for grinding prey Suborder Osmeroidei ¡ Small elongate fishes that prey on small invertebrates. ¡ Some populations are large ¡ Favored food fishes ¡ Northern smelts ¡ Noodlefishes ¡ Southern hemisphere smelts Family Osmeridae-- True Smelts ¡ 13 spp common in northern halves of North America and Eurasia ¡ Freshwater, estuarine, marine & anadromous spp ¡ Pelagic predators on zooplankton and small...
View Full Document

  • Spring '08
  • Baltz,D
  • fishes Northern smelts, anadromous spp Pelagic, anadromous salmon species, anadromous Pacific salmon, Southern hemisphere smelts

{[ snackBarMessage ]}

Page1 / 4

Smelt & Salmon Lecture - Smelt Salmon and Pike...

This preview shows document pages 1 - 2. Sign up to view the full document.

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