Cetacean

General Information

North Sea

Baltic Sea

Clyde Marine Region

Adriatic Sea

Eastern Mediterranean Sea

Cetacean

File:Layer Cetacean.png
Layer Info
Category	Ecology
Sub-category	Birds and mammals

Description

Cetaceans are a diverse group of marine mammals that are well-adapted to life in the water. They include whales, dolphins and porpoises. Cetaceans have streamlined bodies, which allow them to move efficiently through the water. They use flukes (tail fins) for propulsion. Despite being marine mammals, cetaceans are air-breathing creatures. They possess blowholes on the tops of their heads, which they use to surface and breath. It enables them to remain underwater for extended periods, varying depending on the species. Key features include their complete adaptation to aquatic life, frequently substantial size, and strictly carnivorous diet. There are over 80 recognized species of cetaceans, this includes the largest animal on Earth, the blue whale.

Cetaceans play crucial roles in marine ecosystems, influencing prey populations and maintaining the balance of marine food webs. Many cetacean species are migratory, traveling long distances between feeding and breeding grounds. Often cetacean species are highly social and live pods or schools. These groups can range in size from a few individuals to several hundred.

Diet: Cetaceans exhibit a wide range of feeding behaviors and diets. Some species are filter feeders, consuming tiny plankton and small fish, while others are active hunters, capturing larger prey like fish and squid.

Threats: Cetaceans have been the target of extensive hunting for their meat, blubber, and oil by commercial enterprises. Noise pollution from sources like shipping, oil drilling, and military activities can interfere with cetacean communication, navigation, and feeding. This can lead to stress and reduced reproductive success. Additionally overfishing of key prey species for cetaceans, can lead to food scarcity and overall population declines.

Return to Birds and Mammals.

Information

White-Beaked Dolphin (NOAA)

Example species: Lagenorhynchus albirostris(White-beaked dolphin)

Habitat: Pelagic

Main role: Predator

Trophic level: 4,8

Diet: They prey on whiting and cephalopods.

Threats: Sensitive to entanglement in fishing nets, a critical threat to their well-being. Additionally, the depletion of food resources due to extensive fishing activities

The Cetacean species in the North Sea are: Minke whale (Balaenoptera acutorostrata), Porpoise (Phocoena phocoena), White-beaked dolphin (Lagenorhynchus albirostris), and Atlantic white-sided dolphin (Lagenorhynchus acutus). In the North Sea they feed on Herring, Mackerel, Sandeel and Demersal Fish. Their well-being is significantly affected by noise, and they actively avoid surface disturbance. Additionally, they are often seen as by-catch in drift & fixed nets fishing.

Types

• Very Low Density
• Low Density
• Medium Density
• High Density
• Very High Density

Metadata

Data Source

Cetacean 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 North Sea 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 Baltic Sea Edition.

Western Baltic Sea

The cetacean layer in the Western Baltic Sea edition only represents the Harbour Popoise.

Types

• Very Low Density
• Low Density
• Medium Density
• High Density
• Very High Density

Metadata

Data Source

Cetacean 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.

Information

Add species types in the EwE

In the Clyde Marine Region cetaceans feed on Sandeel and their well-being is significantly affected by noise, and they actively avoid surface disturbance.

Types

• Extremely Low
• Low
• Medium
• High
• Extra High

Metadata

Data Source

Cetacean 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.

Information

In the Eastern Mediterranean Sea EwE model there is a functional group dedicated to whales and another one to dolphins. Here we specify the details for the whales.

Types

• Very Low Density
• Low Density
• Medium Density
• High Density
• Very High Density

Metadata

Data Source

Whales is a month-by-month, computer generated data layer following calculations made by the ecosystem simulation (EwE). The simplified EwE Eastern Mediterranean model was adjusted for use in the MSP Challenge by Eyal Ofir.

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.