Časoris
Dolphins from the Gulf of Trieste. Photo: Tilen Genov/Morigenos
Photo: Tilen Genov/Morigenos

Dolphins share the Gulf of Trieste

Dolphins are most endangered by fishing, the polluted environment and climate change.

Fortunately dolphins are a charismatic species. They are studied by many biologists, who thus help them to survive.

However, some species are already very vulnerable, and their numbers are rapidly decreasing.

The common bottlenose dolphins are not among these yet. These are the dolphins that live in our seas.

Tilen Genov from the Morigenos Society began collaborating with colleagues many years ago to explore the social life of dolphins in the Gulf of Trieste.

Among other things, it has been observed that there are two dolphin groups in the same area of the bay, but never at the same time. One group was always meeting there in the morning, the other in the evening.

This surprised the researchers, as they had not yet seen such segregation according to the time of day.
»If dolphins gather in a certain area every day at the same time, they can be endangered by fishing and maritime traffic,« explains the marine mammal researcher.

»Knowing time patterns is of vital importance for the effective protection of animals. If we know when they will swim, we can move certain activities to when fewer animals are there, or when they are not eating or resting.«

They also found that dolphins are very picky about who they hang out with. Each group was made up of long-standing friends who avoided dolphins from the other group.

 

Points to Consider

  1. Why is fishing industry endangering dolphins?
  2. Why are some smaller populations more endangered the large one?
  3. Do you know any other sort of charismatic animals?

 

***

The original version of this article was published on January 10th.

English translation courtesy of JL Flanner, Total Slovenia News, an English language website with news from and about Slovenia.

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Katja

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