Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Bright spots for the future of coral reefs: New insights into fish biomass on coral reefs


International team of researchers studies 2,500 tropical coral reefs in 46 countries / New approaches for the conservation of coral reefs / Bremen scientist Dr. Sebastian Ferse is co-author of the study in “Nature”

Coral reefs are a food source for millions of people in the tropics, but many do not deliver the expected catch any more. What influences fish abundance in these environments? An international team of 39 researchers explored this question on 2,500 reefs in 46 countries and collected a tremendous amount of data.

Fisher in Manus (Papua Neuguinea) – one of 2,500 locations of the “Nature” study

Dr. Sebastian Ferse

The results of the international study headed by lead author Prof. Josh Cinner from James Cook University in Australia could now form the basis for new approaches to conservation. The study has been published this week in the renowned journal “Nature” – coinciding with the start of the world’s largest international coral reef conference ICRS (June 19 to 24) in Hawaii. Dr. Sebastian Ferse from the Leibniz Center for Tropical Marine Ecology in Bremen is one of the co-authors of the study.

Inefficient fisheries management and good access to the nearest markets – these are some of the main factors for overfishing in reefs. The “Nature” study shows that some reefs still have unexpectedly high fish abundance despite these conditions.

The scientists set more than 6000 transects on coral reefs around the equator. “Certain parts of the reefs are marked using a line and the number and species of fish are then being documented in this marked area,” explains Dr. Sebastian Ferse. He studied reefs in North Sulawesi in Indonesia, which are among the most species-rich on the planet. The observations focused on species directly dependent on the reefs, among them economically valuable fishes such as wrasses, groupers or parrotfish.

In addition the researchers collected a wide range of data on environmental conditions, fisheries management and socio-economic conditions at the studied coastal sites. The statistical analysis showed that the fish biomass on most reefs could be explained as a result of the considered factors: Size and accessibility of the nearest fish market, transport infrastructure, compliance with management rules and the local reef habitat had a strong influence on the biomass of reef fish.

“Roughly six per cent of the reefs were outliers and had a significantly higher or lower fish biomass than expected. Some reefs in almost pristine areas performed worse than others with high population density and fisheries. These were exciting findings, and began to look into the reasons for these deviations,” reports Dr. Ferse.

“We were particularly interested in these bright spots with more fish than expected based on their exposure to pressures like human population, poverty, and unfavourable environmental conditions, “ says Prof. Josh Cinner from James Cook University in Australian and lead author of the study. “To be clear, bright spots are not necessarily pristine reefs, but rather reefs that have more fish than they should have, given the pressures they face.” Among those locations were sites in the Solomon Islands, parts of Indonesia, Papua New Guinea and Kiribati.

The locations with more fish biomass than expected were characterized for example by an involvement of the coastal population in fisheries management, or where centuries-old fishery traditions with rules and restrictions had still been established.

Locations that positively stood out also were places where people are highly dependent on marine resources and are lacking alternative sources of income. In those areas there is a great necessity for a sustainable use of reef resources

Dr. Ferse says: “These exceptional cases provide a good basis for us to study how coastal communities have managed to keep their reefs in an unexpectedly good shape, thus going against the global trend.”

In contrast, the locations with significantly lower fish biomass than expected were characterized by environmental pressures such as storms or coral bleaching, and in particular by technological improvements in fisheries, transport or refrigeration.

“The classical technical measures of fisheries management therefore run the risk of being traps leading to overexploitation of resources. Alternative approaches of fisheries management that include local populations should be considered instead”, says Dr. Ferse. “Tropical coral reefs are highly complex systems which react very sensitively to changes in their environments. Any type of protection or management must be based on an exact analysis of the local conditions.”

“We believe that our results can show and offer solutions for the conservation of coral reef fisheries,” explains Prof. Josh Cinner. “Specifically, investments that foster local involvement and provide people with ownership rights can allow people to develop creative solutions that help defy expectations of reef fisheries depletion.”

The study has been published in internationally renowned journal “Nature” on June 15, 2016. It can be found here: <www.>

1) Photo attachment:
Caption: Fisher in Manus (Papua Neuguinea) – one of 2,500 locations of the “Nature” study; Copyright: Dr. Sebastian Ferse.

2) More images for download at:
Pictures are provided for one-time use only in conjunction with this press release. They are not available for re-use or archiving. Please credit photographer as named in captions.

Dr. Sebastian Ferse
Leibniz-Zentrum für Marine Tropenökologie
Tel: +49 (0)421 23 800 28
Mobil: +49 (0)1577 237 9259

Andrea Daschner
Communication Department
Tel: +49 (0)421 23 800 72

Weitere Informationen:

Andrea Daschner | idw - Informationsdienst Wissenschaft

More articles from Life Sciences:

nachricht Molecular doorstop could be key to new tuberculosis drugs
20.03.2018 | Rockefeller University

nachricht Modified biomaterials self-assemble on temperature cues
20.03.2018 | Duke University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

Im Focus: Surveying the Arctic: Tracking down carbon particles

Researchers embark on aerial campaign over Northeast Greenland

On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...

Im Focus: Unique Insights into the Antarctic Ice Shelf System

Data collected on ocean-ice interactions in the little-researched regions of the far south

The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

Physicists made crystal lattice from polaritons

20.03.2018 | Physics and Astronomy

Mars' oceans formed early, possibly aided by massive volcanic eruptions

20.03.2018 | Physics and Astronomy

Thawing permafrost produces more methane than expected

20.03.2018 | Earth Sciences

Science & Research
Overview of more VideoLinks >>>