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Esocidae (pikes)

Esocidae (pikes). Fish of Isle Royale web album. Large size Torpedo shaped “Duck bill” Fanglike teeth Soft-rayed dorsal fin toward posterior end of body Caudal fin homocercal, forked. David Gagnon. northern pike ( Esox lucius ) ). Esocidae. Predators of vertebrates

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Esocidae (pikes)

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  1. Esocidae (pikes) Fish of Isle Royale web album • Large size • Torpedo shaped • “Duck bill” • Fanglike teeth • Soft-rayed dorsal fin toward posterior end of body • Caudal fin homocercal, forked David Gagnon northern pike (Esox lucius))

  2. Esocidae • Predators of vertebrates • Fish, amphibians, birds, mammals • Ambush predators of vegetated lakes • Important IA sportfish GLERL/NOAA muskellunge (Esox masquinongy))

  3. Cyprinidae (minnows) Konrad Schmidt • Most small, a few large • Mouth terminal or subterminal; some with barbels and/or suckerlike lips • Fins of soft rays (exceptions: common carp, goldfish have 1 hard ray on dorsal fin) • Dorsal fin with < 10 rays (exceptions: common carp, goldfish have more, but lack suckerlike lips) • Cycloid scales Topeka shiner (Notropis topeka))

  4. Cyprinidae Jane Cerza, Stratford Landing Virginia Elementary School • Most abundant IA fishes in numbers of individuals, species, and biomass • Critical link in food webs • Common carp (Cyprinus carpio) and other exotic species threaten native species, ecosystems common carp (Cyprinus carpio))

  5. Catostomidae (suckers) GLERL/NOAA • Mouth usually subterminal; lips usually suckerlike and thick, often papillose, plicate (exception: bigmouth buffalo) • Fins of soft rays • Dorsal fin usually with > 10 rays • Anal fin near posterior end • Cycloid scales quillback (Carpiodes cyprinus)) Iowa DNR northern hog sucker (Hypentelium nigricans))

  6. Catostomidae GLERL/NOAA • Important food web components • Spectacular spawning runs • Many IA species endangered/extirpated (sensitive to environmental change) • Buffalofishes commercially important (1+ million lbs. harvested annually from border rivers) bigmouth buffalo (Ictiobus cyprinellus))

  7. Ictaluridae (bullheads, catfishes) USDA Forest Service • Flat head with abundant, long barbels • Sharp, heavy dorsal and pectoral spines (hard rays) • Adipose fin • Scaleless body channel catfish (Ictalurus punctatus))

  8. Ictaluridae Iowa DNR • Primarily benthivorous; omnivorous • Glands in hard rays release irritating chemical; madtom hard rays venomous • Important food and sportfish; channel catfish might be most popular sportfish in IA. black bullhead (Ameiurus melas))

  9. Percopsidae (trout-perches) Iowa DNR • Small body • Dorsal, pelvic, anal fins with spines (perch-like) • Adipose fin (trout like) • Caudal fin forked trout-perch (Percopsis omiscomaycus))

  10. Percopsidae • Consume aquatic invertebrates • Trout-perch (P. omiscomaycus) inhabits streams, lakes of northwest IA • Too small to be commercially important trout-perch (Percopis omiscomaycus))

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