Navigation Links
Even fish don't swim well when they're young!

Do you remember learning to swim? Thrashing around, floundering, until suddenly it all clicks into place and a few feeble strokes of doggy-paddle propel you away from your parent's arms. Surely, you think, fish must be born as expert swimmers. Actually, fish larvae are pretty feeble when it comes to an efficient mode of swimming called 'burst-and-coast'. Dr Ulrike Müller from Wageningen University studies how fish swim: "Fish larvae are the most critical life history stage. In marine fish more than 99% of the mortality occurs in the larval stage so anything that might explain what holds them back is useful". Müller will present her research on Monday 3rd April, at the Society for Experimental Biology's Annual Main Meeting in Canterbury [session A5].

The 'burst-and-coast' method of swimming involves alternating stages: the fish power forward in a 'burst' and then hold their body straight to 'coast'. Dr Müller and her colleagues might have found what it is that prevents larvae of the zebrafish from reaching top speeds: the larvae cannot maintain their body in a horizontal position while coasting. The research team think this is because larvae don't have the help of an adult swimbladder and have only small, ineffective side-fins. This lack of control in early days means that the larvae suffer a lot of drag during the coasting phase and this could be something that affects other types of fish. "Many fish larvae hatch without fully formed pectoral fins and all hatch without a swimbladder, so similar problems could occur for them", predicts Müller.

This conclusion is all the more profound because it refutes two previous theories of poor hatchling swimming, one focusing on the burst phase and the other on the coast.The former of the two explanations suggests that because the larvae are not very heavy they may not gain much momentum in the burst phase to carry over into the coast phase, while the latter theory states that when the larvae are very small they e xperience the water in a different way; it appears thicker, like syrup and harder to swim in. "Momentum can explain some of the poor swimming in larvae, but not all, and the difference in coasting ability cannot be explained by differences in body length either", Müller argues.

Hopefully Müller's findings about pectoral fins and swimbladders can be used to reduce fish mortality rates. "Fish breeding programs cannot offer their larvae swimming lessons, but once we understand which behaviours cause the fish larvae the most trouble, then it is easier to adjust rearing schemes in aquaculture and to lend a hand to endangered species", she says.


'"/>

Source:Society for Experimental Biology


Related biology news :

1. Penguins waddle but they dont fall down, UH researchers say
2. Nearly half of people who need cholesterol treatment dont get it
3. Study: Paramedics save more lives when they dont follow the rules
4. One-third of adults with diabetes still dont know they have it
5. Survival of the selfless - scientists find cheats dont always prosper
6. Why mice dont get cancer of the retina
7. Why dont all moles progress to melanoma?
8. New cigarette designs dont offer lower predicted cancer risks
9. Some caterpillers just dont want to grow up
10. Mosquito repellents that emit high-pitched sounds dont prevent bites
11. When your brain talks, your muscles dont always listen
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/14/2016)... Allemagne, March 14, 2016 ... - --> - Renvoi : image disponible ... --> --> DERMALOG, ... fournit de nouveaux lecteurs d,empreintes digitales pour l,enregistrement ... DERMALOG sera utilisé pour produire des cartes d,identité ...
(Date:3/11/2016)... March 11, 2016 --> ... research report "Image Recognition Market by Technology (Pattern Recognition), ... Advertising), by Deployment Type (On-Premises and Cloud), by Industry ... published by MarketsandMarkets, the global market is expected to ... 29.98 Billion by 2020, at a CAGR of 19.1%. ...
(Date:3/10/2016)... 10, 2016   Unisys Corporation (NYSE: UIS ... (CBP) is testing its biometric identity solution at the ... to help identify certain non-U.S. citizens leaving the country. ... designed to help determine the efficiency and accuracy of using ... and will run until May 2016. --> ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... , ... May 26, 2016 , ... ... FireflySci cuvettes are used in leading laboratories all over the globe. Their cute ... In addition to manufacturing awesome cuvettes, FireflySci makes spectrophotometer calibration standards that never ...
(Date:5/25/2016)... ... May 25, 2016 , ... The American ... the Office of the National Coordinator for Health IT (ONC) outlining a measurement ... relevant data were available when and where it was needed. The organization of ...
(Date:5/24/2016)... Worcester, Mass. (PRWEB) , ... May 24, 2016 ... ... including heart attacks, diabetes, and traumatic injuries, will be accelerated by research at ... skin cells into engines of wound healing and tissue regeneration. , The novel ...
(Date:5/23/2016)... Willoughby, Ohio (PRWEB) , ... May 23, 2016 ... ... Six Trends That Will Drive Precision Farming in 2017 and Beyond. The paper ... and practitioners in the precision ag industry. , “We’ve witnessed a lot of ...
Breaking Biology Technology: