Navigation Links
Fish ear bones point to climate impacts

Scientists believe that fish ear bones and their distinctive growth rings can offer clues to the likely impacts of climate change in aquatic environments.

The earbones, or 'otoliths', help fish to detect movement and to orient themselves in the water. Otoliths set down annual growth rings that can be measured and counted to estimate the age and growth rates of fish.

"Otoliths can form the basis of new techniques for modelling fish growth, productivity and distribution in future environments," said Dr John Morrongiello of CSIRO's Wealth from Oceans Flagship, lead author of a paper published online in Nature Climate Change today.

"They are widely used to support fishery stock assessments, and are beginning to be used to measure and predict ecological responses to ocean warming and climate change.

"Millions of otoliths are archived in research laboratories and museums worldwide, and many fish species live for decades and some, such as orange roughy, live for up to 150 years.

"Their otoliths record variations in growth rates that reflect environmental conditions. Longer-lived fish and older samples take us back as far as the 1800s."

The paper, co-authored by Dr Ron Thresher and Dr David Smith of CSIRO, builds on earlier research by Dr Thresher that identified the potential of using fish 'hard parts', (such as otoliths), and deep ocean corals to understand environmental change. It outlines a framework in which Australian research institutions can analyse hard parts and assess past and future impacts on a range of species.

In the next research phase, scientists at CSIRO, the Australian Institute of Marine Science and the University of Adelaide will study selected species of commercial interest, including tiger flathead, black bream, blue gropers, barramundi and tropical snappers.

"We will use otoliths to investigate the environmental drivers of fish growth for many species around Australia," Dr Morrongiello said.

"This will allow us to generate a continental-scale evaluation of climate change impacts on Australia's fishes and help to guide the conservation and management of our aquatic environments into the future."

Dr Thresher said there had already been extensive use of hard part archives from corals to reflect on climate variability, such as El Nio events, and to reconstruct environmental histories.

"Any change identified in growth and age maturity, especially of commercially-important species, clearly has implications for forecasting future stock states and the sustainable management of fisheries," Dr Thresher said.

"A better ability to predict such change will greatly enhance our ability to forecast, manage and adapt to the impacts of climate change in marine and freshwater systems."


Contact: Bryony Bennett
CSIRO Australia

Related biology news :

1. Acid-wielding worms drill through bones at the bottom of the sea
2. Mechanical properties and microstructure of cranial and beak bones of the woodpecker and the lark
3. Protein injection points to muscular dystrophy treatment
4. University of Maryland School of Medicine, NIH study pinpoints brain areas role in learning
5. New study to examine ecological tipping points in hopes of preventing them
6. Fossil study helps pinpoint extinction risks for ocean animals
7. Remarkable enzyme points the way to reducing nitric acid use in industry
8. Zebra fish point the way towards new therapies for amyotrophic lateral sclerosis
9. U OF A expert pinpoints nutrient behind fresh water algae blooms
10. NPointer from Neurotechnology Uses Hand Gestures to Control and Navigate Computer Programs Without a Mouse or Touchpad
11. Chromosomal translocations point the way toward personalized cancer care
Post Your Comments:
Related Image:
Fish ear bones point to climate impacts
(Date:11/17/2015)... 17, 2015 Paris ... --> Paris , qui s,est ... DERMALOG, le leader de l,innovation biométrique, a inventé le ... et empreintes sur la même surface de balayage. Jusqu,ici, ... l,autre pour les empreintes digitales. Désormais, un seul scanner ...
(Date:11/16/2015)... JOSE, Calif. , Nov 16, 2015 /PRNewswire/ ... developer of human interface solutions, today announced expansion ... Synaptics TouchView ™ touch controller and display ... architectural revolution of smartphones. These new TDDI products ... include TD4100 (HD resolution), TD4302 (WQHD resolution), and ...
(Date:11/12/2015)... --  Growing need for low-cost, easy to use, ... the way for use of biochemical sensors for ... clinical, agricultural, environmental, food and defense applications. Presently, ... applications, however, their adoption is increasing in agricultural, ... on improving product quality and growing need to ...
Breaking Biology News(10 mins):
(Date:11/27/2015)... ... November 27, 2015 , ... Pittcon is pleased to ... presentations offered in symposia, oral sessions, workshops, awards, and posters. The core ... of applications such as, but not limited to, biotechnology, biomedical, drug discovery, environmental, ...
(Date:11/25/2015)... ANNAPOLIS, Md. , Nov. 25, 2015  PharmAthene, ... of Directors has adopted a stockholder rights plan (Rights ... its net operating loss carryforwards (NOLs) under Section 382 ... --> --> PharmAthene,s use of its ... an "ownership change" as defined in Section 382 of ...
(Date:11/25/2015)... /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ:  AEZS; TSX: AEZ) ... remain fundamentally strong and highlights the following developments: ... DSMB recommendation to continue the ZoptEC Phase 3 ... final interim efficacy and safety data , ... with heavily pretreated castration- and Taxane-resistant prostate cancer ...
(Date:11/24/2015)... , Nov. 24, 2015  Asia-Pacific (APAC) holds ... organisation (CRO) market. The trend of outsourcing to ... margins but higher volume share for the region ... scale, however, margins in the CRO industry will ... Market ( ), finds that the ...
Breaking Biology Technology: