BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology

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Presentation transcript:

BIOL 3300 Vertebrate Zoology: Ectotherms - Herpetology

Open with Prayer Take attendance Course Page (NOT Angel) – – Syllabus – Calendar Grade permission forms Nuts and Bolts …

What is a “herp”? “These foul and loathsome animals… are abhorrent because their cold body, pale color, cartilaginous skeleton, filthy skin, fierce aspect, calculating eye, offensive smell, harsh voice, squalid habitation, and terrible venom; and so their Creator has not exerted His power to make many of them.” Carl von Linne Systema Naturae

Linneaus was wrong about herpetofauna in more ways than one… How? – 1) – 2) – 3) What is a “herp”? _lives/poison-dart_frogs.php

Herpetofauna have important roles in history and culture… ∆ Come up with a fairy tale, myth, cultural function for a “herp” of your choice… Herpetofauna have important roles in modern science Why are “herps” important?

Lissamphibia… Attributes: Who are they?

Urodela (Caudata)… Attributes: Who are they?

Anura (Salientia)… Attributes: Who are they? © A. Reitsma, Aquarium of the Pacific

Gymnophiona (Apoda)… Attributes: Who are they?

Reptilia (Non-Avian Reptiles)… Attributes: Who are they?

Testudines (Chelonia)… Attributes: Who are they? Encarta Website

Crocodylia… Attributes: Who are they?

Rhyncocephalia… Attributes: Who are they? arthursclipart.org

Squamata (Lepidosauria)… Attributes: Who are they?

Which do you prefer? – Batrachology – Squamatology – Testudinology – Crocodylology If so diverse… why grouped?

How do you heat yourself… electromagnetically or chemically? _____________ is THE key feature to understanding this diverse group! Importance of Ectothermy!

Fig. 1-6 Demonstrates T b of a desert iguana (Dipsosaurus dorsalis). How do herps utlize ectothermy?

What are the benefits?

E ctotherms are E fficient What are the benefits? EctothermsEndotherms Plethodon cinereus48K-rat0.8 Desmognathus ochrophaeus76-98Field Mouse1.8 Norops limifrons23-28Meadow Vole3.0 Uta stansburiana18-25Red squirrel1.3 Heterodon contortix81Least Weasel2.3 Python curtus6-33Savanna Sparrow1.1 Vipera berus49Marsh Wren0.5 Mean (n=12)50Mean (n=19)1.4 Source: Pough et al. 2004

Not always at optimal performance ( why? ) What are the disadvantages?

Herpetofauna as a RULE are much smaller than birds or mammals. Smallest bird? Smallest mammal? Smallest herp? What is the influence on size? why?