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

16.06.2016

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. dx.doi.org/10.1038/nature18607>

Images:
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: http://www.bit.ly/25Qrvgo
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.

Contact:
Dr. Sebastian Ferse
Leibniz-Zentrum für Marine Tropenökologie
E-Mail: sebastian.ferse@leibniz-zmt.de
Tel: +49 (0)421 23 800 28
Mobil: +49 (0)1577 237 9259

Andrea Daschner
Communication Department
E-Mail: andrea.daschner@leibniz-zmt.de
Tel: +49 (0)421 23 800 72

Weitere Informationen:

http://www.dx.doi.org/10.1038/nature18607

Andrea Daschner | idw - Informationsdienst Wissenschaft

More articles from Life Sciences:

nachricht Magic number colloidal clusters
13.12.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

nachricht Record levels of mercury released by thawing permafrost in Canadian Arctic
13.12.2018 | University of Alberta

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: An energy-efficient way to stay warm: Sew high-tech heating patches to your clothes

Personal patches could reduce energy waste in buildings, Rutgers-led study says

What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...

Im Focus: Lethal combination: Drug cocktail turns off the juice to cancer cells

A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.

The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...

Im Focus: New Foldable Drone Flies through Narrow Holes in Rescue Missions

A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.

Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...

Im Focus: Topological material switched off and on for the first time

Key advance for future topological transistors

Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...

Im Focus: Researchers develop method to transfer entire 2D circuits to any smooth surface

What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.

Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

New Plastics Economy Investor Forum - Meeting Point for Innovations

10.12.2018 | Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

 
Latest News

Magic number colloidal clusters

13.12.2018 | Life Sciences

UNLV study unlocks clues to how planets form

13.12.2018 | Physics and Astronomy

Live from the ocean research vessel Atlantis

13.12.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>