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Barndoor skate


Barndoor skate
Photo Information
Copyright: Josee Laneuville (Lagrifajo) Silver Star Critiquer/Silver Note Writer [C: 32 W: 1 N: 44] (296)
Genre: Animals
Medium: Color
Date Taken: 2005-02-04
Categories: Fish
Photo Version: Original Version
Date Submitted: 2005-03-15 21:47
Viewed: 8435
Points: 6
[Note Guidelines] Photographer's Note [French]
Here the inderside of the barndoor skate The photo one was taken through window, of course. The barndoor skate had fun to appear in this way by the window.

Classification
Phylum: Chordata
Class: Chondrichthyes (cartilaginous fish)
Order: Rajiformes
Family: Rajidae
Scientific name: Raja laevis
French name: Grande raie

Characteristics
Weight: 14 to 17 kg
Status: Common species

Distinguishing features: This skate has a flattened body, a pointed snout and fairly smooth skin. There are several mucous pores marked with black spots on its ventral surface, and several rows of spines on its tail.

Reproduction: Spawning occurs in winter. Fertilization is internal. The eggs of the barndoor skate are encased in yellowish capsules that are 12.7 cm long and 7 cm wide.

Diet: These fish eat invertebrates, including bivalve molluscs, crabs, lobster, shrimp and worms. They also eat various types of fish, including spiny dogfish, gaspereau, herring, sea lances and flatfishes.

Predators: Their main enemies are large sharks.

Habitat: Barndoor skates live in salt water on various types of bottoms. They tolerate a wide range of temperatures, from 1.2 to 20°C. They are found in shallow water, along the continental shelf, down to 750 metres.

Ecology
behaviour: These voracious predators have few enemies. At rest, barndoor skates are camouflaged against the bottom. They use their sensitive snouts to forage in the sand or mud. The spiracle, a small hole located behind each eye, is used to take in water and avoid blocking the gills.
Source : http://www2.ville.montreal.qc.ca/biodome/ebdm2.htm

Vous pouvez voir cette photo en suivant ce lien :
http://www.arkive.org/barndoor-skate/dipturus-laevis/image-G77664.html

LordPotty, Janice, guychou, Luc has marked this note useful
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To LordPotty: Thanks!Lagrifajo 4 03-23 23:07
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Critiques [Translate]

Interesting post Josee. I presume we're looking at the underside of the skate? Its a most unusual creature.
Your notes are very comprehensive. well done.

  • Great 
  • Janice Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3277 W: 148 N: 6163] (18832)
  • [2005-03-16 3:48]

Very clear and sharp Skate Josee. Excellent shot - a view we don't often see. You must have had fun diving. Well done.

Belle prise! Félicitation. La netteté est surprenante.

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