Rays and Skates: Difference between revisions

Rays and Skates
Layer Info
Category	Ecology
Sub-category	Fish

Revision as of 14:30, 11 October 2023

Description

Rays and Skates are commonly known as Elasmobranchs, which include, sharks, skates and ray, they differ from other fish in the sea by having a skeletal structure made out of cartilage as opposed to bone. They are vulnerable to overfishing and once depleted, populations take a long time to recover. Rays and Skates are slow growing, late to reach maturity and typically have low fecundity, thus the number of individual fish recruited into a population on an annual basis is low.

Diet: Rays and Skates have similar feeding habits as they are both bottom-dwellers. They generally feed on various species of crustaceans like crabs and shrimps. Additionally, small fish and clams and mussels depending on the size of the ray or skate. They also consume a variety of worms and other small invertebrates that inhabit the seabed.

Threats: Young Rays and Skates are large enough to get caught as by-catch in trawl nets and dredge gear. Relatively a small proportion will actually reach breeding age, and those that do only produce enough of young later in life to help rebuild the population. Furthermore, the destructive fishing practices such as bottom trawling, can damage the seabed and habitats.

Not applicable. This layer is not yet available in the MSP Challenge North Sea Edition.

Not applicable. This layer is not yet available in the MSP Challenge Baltic Sea Edition.

Information

The type of Rays and Skates dominant in the Clyde Marine Region are the Common Skate (Dipturus batis) and Sandy Ray (Raja brachyura).

Types

Extremely Low
Low
Medium
High
Extra High

Metadata

Data Source

Rays and Skates is a month-by-month, computer generated data layer following calculations made by the ecosystem simulation (EwE). For more information on how Ecopath-with-Ecosim (EwE) works, please visit our Wiki page or visit the official EwE website at https://ecopath.org.

For detailed information on how the simulation works for the Clyde Marine Region Edition, we recommend further exploring our research publication called "Combining ecosystem modeling with serious gaming in support of transboundary maritime spatial planning".

Not applicable. This layer is not yet available in the MSP Challenge Adriatic Sea Edition.

Not applicable. This layer is not yet available in the MSP Challenge Eastern Mediterranean Sea Edition.

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 ==Description==
-Rays and Skates are commonly known as Elasmobranchs, which include, sharks, skates and ray, they differ from other fish in the sea by having a skeletal structure made out of cartilage as opposed to bone.
+Rays and Skates are commonly known as Elasmobranchs, which include, sharks, skates and ray, they differ from other fish in the sea by having a skeletal structure made out of cartilage as opposed to bone. They are vulnerable to overfishing and once depleted, populations take a long time to recover. Rays and Skates are slow growing, late to reach maturity and typically have low fecundity, thus the number of individual fish recruited into a population on an annual basis is low.
-'''Diet:''' Rays and Skates have similar feeding habits as they are both bottom-dwellers.
+'''Diet:''' Rays and Skates have similar feeding habits as they are both bottom-dwellers. They generally feed on various species of crustaceans like crabs and shrimps. Additionally, small fish and clams and mussels depending on the size of the ray or skate. They also consume a variety of worms and other small invertebrates that inhabit the seabed.
-'''Threats:''' They are vulnerable to overfishing and once depleted, populations take a long time to recover. Rays and Skates are slow growing, late to reach maturity and typically have low fecundity, thus the number of individual fish recruited into a population on an annual basis is low. Young Rays and Skates are large enough to get caught as by-catch in trawl nets and dredge gear. Relatively a small proportion will actually reach breeding age.
+'''Threats:'''  Young Rays and Skates are large enough to get caught as by-catch in trawl nets and dredge gear. Relatively a small proportion will actually reach breeding age, and those that do only produce enough of young later in life to help rebuild the population. Furthermore, the destructive fishing practices such as bottom trawling, can damage the seabed and habitats.
 =North Sea=
@@ Line 28: / Line 28: @@
 == Information ==
-Add species from Ew
+The type of Rays and Skates dominant in the Clyde Marine Region are the Common Skate (''[https://www.marinespecies.org/aphia.php?p=taxdetails&id=105869 Dipturus batis]'') and Sandy Ray (''[https://www.marinespecies.org/aphia.php?p=taxdetails&id=367297 Raja brachyura]'').
-Basking Shark (''Cetorhinus maximus''), Spurdog (''Squalus acanthias''), Porbeagle Shark (''Lamna nasus''), Common Skate (''Dipturus batis''), Blue Shark (''Prionace glauca''), and Sandy Ray (''Raja brachyura'').
 ==Types==