The work of the Swiss Federal Institute of Technology in Zurich (ETHZExternal link), in collaboration with French universities, was published in the journal Nature CommunicationsExternal link on Monday. The researchers scoured through an open databaseExternal link of over 50,000 DNA sequences, representing 3,815 species of marine fish and 1,611 species of freshwater fish. They then estimated fish diversity in 200km2 sections of different water bodies.
The greatest genetic diversity of marine fish was found in the western Pacific Ocean, the northern Indian Ocean and the Caribbean. Among freshwater fish, genetic diversity was greatest in South America, but relatively low in Europe. Temperature was an important factor affecting marine fish diversity, with rising temperatures leading to greater diversity. For freshwater fish, complexity of habitat and changes over time were the determining factors.
Applications of the map include the identification of ideal marine-protected areas, which take into account fish diversity hotspots.
“If we want to protect our biodiversity, we also have to monitor the genetic diversity of populations. This is the only way to ensure that the pool of varied genetic material is large enough to enable the survival of species under changing environmental conditions,” said Loïc Pellissier, co- lead author of the study.
More
More
Warming Swiss rivers threaten fish stocks
This content was published on
The report, published in the journal Hydrology and Earth System SciencesExternal link, measured both the melting of glaciers over the course of 40 years and the temperature of rivers they discharge into. They found that rivers had warmed by an average of 0.33°C every decade since 1980, and by 0.37°C per decade over the past…
Swiss authorities announce cost-cutting in asylum sector
This content was published on
The government notably wants to improve integration into the labour force, particularly for people with protection status S.
Various leaders confirm participation at Ukraine peace conference
This content was published on
The presidents of Poland, Finland, and Latvia and the prime ministers of Spain and Belgium will be at the Swiss-hosted talks in mid-June.
This content was published on
In the winter season up to April 2024, railway and cable car operators ferried 3% more visitors compared to the previous winter, and 5% more than the five-year average.
Rhine flooding: Swiss to invest CHF1 billion with Austria
This content was published on
As part of an international agreement with Austria, the Swiss government wants to pump CHF1 billion ($1.1 billion) into flood protection measures along the Rhine over the next three decades.
Swiss government proposes CHF10 million UNRWA donation
This content was published on
After months of debate, Switzerland plans to give CHF10 million ($11 million) to the UN agency this year, rather than the CHF20 million initially foreseen.
Swiss study: insects mainly migrate at midday and dusk
This content was published on
A study led by the Swiss Ornithological Institute in canton Lucerne is helping to better understand the movement patterns of migratory insects.
Red Cross: 22 staff killed in Middle East since October
This content was published on
The Red Cross and Red Crescent network in Gaza and Israel has lost 22 staff members since last October, the Swiss Red Cross (SRC) said on Wednesday.
Dortmund’s Kobel is first Swiss goalie in Champions League final
This content was published on
Borussia Dortmund’s Gregor Kobel has achieved history by becoming the first Swiss goalkeeper to reach a Champion’s League final.
University students in Switzerland join Gaza protest wave
This content was published on
Pro-Palestinian activists occupied university buildings in Lausanne, Geneva and Zurich on Tuesday, widening the protest movement in the Alpine nation.
This content was published on
Scientists have discovered a fossil of a new species of Coelacanth fish in the Swiss Alps. A team of paleontologists found it near Davos.
You can find an overview of ongoing debates with our journalists here . Please join us!
If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.