«ENDANGERED SPECIES» IN SEVER DO VOUGA                       2
Legenda:1. Cedrim do Vouga2. Couto Esteves3. Dornelas4. Paradela do Vouga5. Pessegueiro do Vouga6. Rocas do Vouga7. Sever ...
«Petromyzon Marinus or Lampreys»       (sometimes also called lamprey eels)   4
Lampreys    Are a family of jawlessfish,   whose   adults   arecharacterized by a toothed,funnel-like sucking mouth.    Tr...
In zoology, lampreys are sometimes notconsidered to be true fish because of theirdistinctive morphology and physiology.   ...
Morphology   Adults physically resemble eels, in thatthey have no scales, and can range anywherefrom 13 to 100 centimeters...
Curiosity   Lampreys         are    called"nine-eyed eels" (i.e., perside) from a counting oftheir seven external gillslit...
What do they eat?   They feed on prey as adults by attachingtheir mouthparts to the target animals body,then using their t...
Where do they live?   Lampreys live mostly in coastal and freshwaters,   although    some   species,   travelsignificant d...
Uses: «Portuguese lamprey rice»   They       were   highly      appreciated   byancient Romans. Their taste is much meatie...
12
Especially in southwestern Europe (Portugal,Spain, and France), larger lampreys are still ahighly prized delicacy. Lamprey...
DAMS and ENDAGERED SPECIES    Rivers possess a delicate ecology that depends ona   regular     cycle   of     disturbance ...
- Check dams prevent flooding of small areas.    - Diversion dams divert river water to irrigatecrops. Large dams may be b...
DAM in SEVER DO VOUGA                        16
17
Endangered Species in Sever do Vouga
Upcoming SlideShare
Loading in …5
×

Endangered Species in Sever do Vouga

732 views

Published on

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
732
On SlideShare
0
From Embeds
0
Number of Embeds
406
Actions
Shares
0
Downloads
3
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Endangered Species in Sever do Vouga

  1. 1. «ENDANGERED SPECIES» IN SEVER DO VOUGA 2
  2. 2. Legenda:1. Cedrim do Vouga2. Couto Esteves3. Dornelas4. Paradela do Vouga5. Pessegueiro do Vouga6. Rocas do Vouga7. Sever do Vouga8. Silva Escura9. Talhadas 3
  3. 3. «Petromyzon Marinus or Lampreys» (sometimes also called lamprey eels) 4
  4. 4. Lampreys Are a family of jawlessfish, whose adults arecharacterized by a toothed,funnel-like sucking mouth. Translated from a mixture of Latin and Greek, lamprey means stone lickers (lambere: to lick, and petra: stone). 5
  5. 5. In zoology, lampreys are sometimes notconsidered to be true fish because of theirdistinctive morphology and physiology. The lampreys are the basal group ofVertebrata (hagfishes are actually notvertebrates, but craniates). 6
  6. 6. Morphology Adults physically resemble eels, in thatthey have no scales, and can range anywherefrom 13 to 100 centimeters (5 to 40 inches)long. Lacking paired fins, adult lampreys havelarge eyes, one nostril on the top of the head,and seven gill pores on each side of the head. 7
  7. 7. Curiosity Lampreys are called"nine-eyed eels" (i.e., perside) from a counting oftheir seven external gillslits on a side with one eyeand the nostril. A Germanword for lampreyis Neunauge, which means"nine-eye". 8
  8. 8. What do they eat? They feed on prey as adults by attachingtheir mouthparts to the target animals body,then using their teeth to cut through surfacetissues until they reach blood and body fluid. 9
  9. 9. Where do they live? Lampreys live mostly in coastal and freshwaters, although some species, travelsignificant distances in the open ocean, asevidenced by their lack of reproductiveisolation between populations. They are found in most temperate regionsexcept those in Africa. 10
  10. 10. Uses: «Portuguese lamprey rice» They were highly appreciated byancient Romans. Their taste is much meatierthan that of most true fish. King Henry I ofEngland is said to have died from eating "asurfeit of lampreys". On March 4th, 1953, QueenElizabeths coronation pie was made bythe Royal Air Force using lampreys. 11
  11. 11. 12
  12. 12. Especially in southwestern Europe (Portugal,Spain, and France), larger lampreys are still ahighly prized delicacy. Lampreys are alsoconsumed in Sweden, Finland, Russia, the Balticcountries and South Korea. In Britain, lampreysare commonly used as bait, normally as deadbait. Pike, perch and chub all can be caught onlampreys. Frozen lampreys can be bought frommost bait and tackle shops. 13
  13. 13. DAMS and ENDAGERED SPECIES Rivers possess a delicate ecology that depends ona regular cycle of disturbance within certaintolerances. Dams disrupt this ecology. There are several types of dams. Check dams Diversion dams Flood control dams Hydroelectric dams 14
  14. 14. - Check dams prevent flooding of small areas. - Diversion dams divert river water to irrigatecrops. Large dams may be built for flood control orelectrical generation, or both. - Flood control dams are often earth dams--made of huge mounds of clay, sand, gravel, androck--but often made of concrete. - Hydroelectric dams are concrete marvels ofengineering. This section will examine mostly thelarge dams: flood control and hydroelectric dams. 15
  15. 15. DAM in SEVER DO VOUGA 16
  16. 16. 17

×