01 Zoogeography

01 Zoogeography - Zoogeography. Zoogeography of Marine...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Zoogeography of Marine Fishes Synthesizes many areas of ichthyology: ecology, physiology, systematics and paleontology and other disciplines: geology & biogeography Zoogeography. .. ± Frustrating aspects: non-existent, fragmented and incomplete knowledge in many areas ± Puzzles easier to solve when you have all the pieces ± Now a sound science--formerly descriptive and speculative ± Historically ‘land bridge hypotheses’ were gross speculation Zoogeography. .. ± Plate Tectonics & Continental Drift explain formerly perplexing geological observations and lead to solution of many zoogeographic problems More so for freshwater than marine fishes ± Patterns for marine fishes seem related to oceanographic features and the position of continents Because most marine fishes are shallow-water spp, CD has probably been significant in their Zoogeography. .. ± Most marine zoogeography is a descriptive division of the marine world into zoogeographic regions with vague boundaries ± Typically boundaries are where oceanographic conditions and consequently fish faunas change rapidly ± Boundaries are rarely complete or permanent Zoogeography. .. ± Two basic rules seem to hold ; Fish species richness decreases with latitude (~1% per degree of Latitude) ; Fish species richness decreases with depth ± Two basic types of fishes found in fresh water (see pages 341-343): euryhaline marine fishes obligatory freshwater fishes Euryhaline Marine Fishes ± Primarily marine Capable of entering fresh water for extended periods lower reaches of coastal streams
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

01 Zoogeography - Zoogeography. Zoogeography of Marine...

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