ESS 345 Ichthyology
Fish diversity and classification
Quote of the Day: There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved. -Charles Darwin, English naturalist (1809 – 1882). Quick Quiz
Describe in a sentence the largest physiographic province in PA (5 EC points) Physiographic Provinces
Blue Ridge Coastal Plain Objectives
Define fish Classify and ID the important fishes at the family level
Describe significant traits, relationships, ecology, biology, importance, conservation, life history, status, etc. of each family Importance of fish
Resources Fascination – Food Evolution – Medicine Recreation – Fertilizer Enjoyment – Jewelry Economy – Tools Aquaria – Fuel Env indicators Threats (poisons, pests, parasites) Human conflict http://www.nativefishsociety.org/
http://www.nanfa.org/ So, what is a Fish?
What are the common features? What is a FISH?
Aquatic Gill Breathing Poikilotherm Vertebrate/Craniate Fins Fish - definition
Difficult – Long evolutionary history – Diverse and adapt – We don’t have all the info
Berra (1981): a poikilothermic, aquatic chordate with appendages (when present) developed as fins, whose chief respiratory organs are gills and whose body is usually covered by scales Fish Classification
Binomial Name – E.g. Lepomis macrochirus Rafinesque 1819 – E.g. Lepomis megalotis (Rafinesque) 1820 Lepomis = scale shoulder megalotis = large ear Fish Classification
The system is meant to: Classification in General
Kingdom – Phylum Class – Order Family Genus Species That is, genealogical relationships Fish Classification Kingdom: Animalia Phylum: Chordata – Class Myxini Hagfish https://www.youtube.com/watch?v=pmaal7Hf0WA Subphylum: Craniata / Vertebrata Superclass: Agnatha – Class: Lamprey (Cyclostomata) Order: Petromyzontiformes
Family: Petromyzontidae Superclass: Gnathostomata – Class: Chondrychthys (Cartilaginous fishes) – Class: Osteichthyes (Bony fishes) (Actinopterygii) 24,000 living forms Largest class of vertebrates Subclasses of Osteichthyes
Sarcopterygii (lobe finned fishes)
Actinopterygii (ray finned fishes)** – Infraclass Chondrostei (sturgeons, paddlefishes) Order Acipenseriformes – Acipenseridae
– Polyodontidae
– Infraclass Neopterygii (modern ray finned fishes) A few diverse lineages (next slide) Division Teleostei – main line Two lineages that are difficult to place Order Lepisosteiformes – Lepisosteidae
Order Amiiformes – Amiidae
Order: Anguilliformes – Anguillidae
Order: Clupeiformes – Clupeidae – Threadfin and gizzard shad (Dorosoma) – Alewife and American shad (Alosa) Teleosts
Order Cypriniformes – Cyprinidae
– Catostomidae Teleosts
Order Siluriformes – Ictaluridae Catfishes (Ictalurus) Bullheads (Ameiurus) Madtoms (Noturus)
Pylodictis olivaris Teleosts
Order Esociformes – Esocidae: (Esox) – Pike, pickerel, musky – Mud minnows
Esox lucius (northern pike) Teleosts
Order Salmoniformes – Salmonidae 3 species in 3 genera Oncorhynchus mykiss Salmo trutta Salvelinus fontinalis
Teleosts
Order Cyprinodontiformes – Fundulidae – killifishes / topminnows – Poeciliidae – topminnows / livebearers
– Cyprinodontidae - pupfishes Teleosts
Order Gasterosteiformes – Gasterosteidae – Cottidae
Cottus bairdi Teleost are:
A. Lobed fin fishes B. Boney fishes C. Primitive ray finned fishes D. Boney fishes with cartilaginous skeletons E. Sharks, skates, and rays Teleosts
Order Perciformes – Moronidae
White Perch
Striped bass, rock fish
White bass Teleosts
Pomoxis nigromaculatus Order Perciformes – Centrarchidae Lepomis Pomoxis Micropterus Micropterus salmoides
Pumpkinseed, Lepomis gibbosus
Not every sunfish is a bluegill Teleosts
Order Perciformes Etheostoma blennioides – Percidae
– Channidae Perca Sander vitreus Northern Snakehead (Channa argus) Quick Quiz
What is an adipose fin? Name 2 families that have one. What’s the largest fish family?
1. Minnow 2. Temperate Basses 3. Sunfishes 4. Darter 5. Perch 6. Sucker Largest FW family indigenous to N. America?
1. Minnow 2. Perch 3. Sucker 4. Catfish 5. Shad 6. FW eels Second largest family indigenous to NA
1. Pike 2. Salmon 3. Perch 4. Pupfish 5. Sunfish 6. Bowfin Why are they indigenous to N.A.?