Navigation Links
Does fishing on drifting fish aggregation devices endanger the survival of tropical tuna?
Date:5/15/2008

catches of skipjack (Katsuwonus pelamis), bigeye (Thunnus obesus) and yellowfin (Thunnus albacares) tuna, the three tropical tuna species which can be caught at drifting FADs, have been achieved using this fishing method. For the skipjack amounts taken under drifting FADs reached even as high as 72% of all catches. To check if the large-scale deployment of drifting FADs could present an ecological trap for these species, a range of biological (fish plumpness, growth rate, stomach fullness) and ecological (migration pattern and distance) indices were determined on yellowfin and skipjack captured under FADs in the Atlantic and Indian Oceans. Comparison was then made with data gathered from free-school caught individuals of these same species. A salient finding was that 74% of drifting FAD-associated skipjack had empty stomachs at the moment of capture compared with only 13% for those fished from free schools. Figures of the same order of magnitude were obtained for yellowfin, with proportions respectively reaching 49% caught on drifting FADs and 7% from free schools. The survey indicated that the tuna caught under the FADs fed less well than those fished from free schools. Moreover, the fact that for the same weight the FAD-associated specimens caught showed lower plumpness than the free-school ones could reflect a deficiency in energy-reserve accumulation in those that concentrated around the floating devices.

The research team also sought to find out if the large-scale deployment of drifting FADs could affect the migration patterns of these far-travelling fish species. Tagging surveys allowed comparison of the nature of migrations accomplished by fish moving with the drift of FADs with that of non-FAD-associated individuals. The migration directions and displacement rates in terms of daily distances travelled were indeed affected by the presence of artificial floating objects. Drifting FADs therefore appeared to act as super-stimuli, like strong magnets ex
'/>"/>

Contact: Gregory Flechet
fichesactu@paris.ird.fr
33-014-803-7607
Institut de Recherche Pour le Dveloppement
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Can certain metals repel sharks from fishing gear?
2. Fishing throws targeted species off balance, Scripps study shows
3. Oceanic sharks worldwide at serious risk from high-seas fishing, rising demand for shark products
4. Small-scale fishing in Mexico rivals industrial fisheries in accidental turtle deaths
5. Research shows loggerhead sea turtles threatened by small-scale fishing operations
6. New Silex SX-560 Enables Enterprise 802.11 Wireless Connectivity for Battery Operated Devices
7. Childrens Hospital leads projects to develop nations first heart assist devices for young children
8. Better protection for biomedial devices could result from Rutgers-Camden research
9. MIT aids creation of neural prosthetic devices
10. IGERT fellows to design biodevices using flexible electronics
11. Great apes endangered by human viruses
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/19/2015)... 19, 2015  VOXX International Corporation (Nasdaq: ... into a Definitive Agreement to purchase the assets, ... market leader EyeLock through an acquiring entity.  Upon ... controlling interest in the acquiring entity. The closing ... due diligence.  Expanding on its existing supply chain ...
(Date:8/12/2015)... August 12, 2015 As the ... payment innovation and advanced biometrics technology is accelerating beyond ... consumers rely on using their credit cards, the digital ... future for payment services led by companies in the ... :  Google, Inc. (NASDAQ: GOOG ), Apple Inc. ...
(Date:8/10/2015)... The latest 364 page report from ... the global border security market . Visiongain ... 2015. Now: Border security is hard to achieve ... business critical issue you need to know about - and ... analysis of how this will impact your company and the ...
Breaking Biology News(10 mins):VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 4Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 2Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 4Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 5Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 7Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 8Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 9
... The extinction of woolly mammoths and other large mammals more ... of cascade of ecosystem disruption that is being caused today by ... life scientists report July 1 in the cover article of the ... cascading events were originally begun by human disruption of ecosystems, a ...
... to breastfeed for at least the first six months of ... can sabotage their efforts, University of Florida researchers say. ... tissue under the tongue is too tight. A tongue tie ... and painlessly, and this struggle can lead many new mothers ...
... A new Florida State University study is investigating how quickly ... sands is being degraded by the sands, natural microbial communities, ... crude are helping or hindering that process. What oceanography ... them to predict when most of the oil in the ...
Cached Biology News:Extinction of woolly mammoths may have been due to addition of a predator: Humans 2Extinction of woolly mammoths may have been due to addition of a predator: Humans 3Treating tongue tie could help more babies breastfeed 2Treating tongue tie could help more babies breastfeed 3How fast can microbes break down oil washed onto Gulf beaches? 2How fast can microbes break down oil washed onto Gulf beaches? 3
(Date:8/31/2015)... -- Research and Markets ( http://www.researchandmarkets.com/research/cbgl72/middle_east_and ) has announced ... Biomedical Sensors Market - Growth, Trends & Forecasts (2014-2020)" ... Middle East & Africa Biomedical ... at a CAGR of 3.26% over the period 2014-2020 ... that are adaptable to the genetic formulation of each ...
(Date:8/31/2015)... and SHANGHAI , Aug. ... biopharmaceutical company developing next-generation antibiotics, today announced positive ... study for its lead drug candidate MRX-I. MRX-I ... drug-resistant bacteria such as MRSA and VRE, while ... tolerated therapeutic option than currently available oxazolidinone agents. ...
(Date:8/31/2015)... ... 31, 2015 , ... The Food Processing Suppliers Association's PROCESS ... equipment manufacturers and leaders in the field of academia. , METTLER TOLEDO ... manufacturers of bakery and snacks; beverages; dairy; meat, poultry and seafood; and prepared ...
(Date:8/28/2015)... , August 28, 2015 According ... (Media, Sera, Cryogenic Storage Systems, Thawing Equipment, Alarms), by ... Medicine, Clinical Trials), End User - Global Forecast to ... expected to reach USD 3,731.03 Million by 2020 from ... of 11.65% between 2015 and 2020. ...
Breaking Biology Technology:Middle East & Africa Biomedical Sensors Market Report 2015 - Growth, Trends & Forecasts to 2020 2MicuRX Reports Positive Top-Line Results In Phase 2 Clinical Trial For Novel Antibiotic MRX-I In Complicated Skin And Soft Tissue Infections 2METTLER TOLEDO Hosts Food Safety Educational Center at 2015 PROCESS EXPO 2Biopreservation Market Worth 3,731.03 Million USD by 2020 2Biopreservation Market Worth 3,731.03 Million USD by 2020 3Biopreservation Market Worth 3,731.03 Million USD by 2020 4Biopreservation Market Worth 3,731.03 Million USD by 2020 5
... Recurring Disposables, Services and Accessories Revenue ... Irrigated Catheter Launch Provided, ST. LOUIS, March 3 ... the fourth quarter and full year,ended December 31, 2007., ... to $39.3 million,compared with $27.2 million in 2006. Sales ...
... Feb. 29 For the first time,researchers at ... spheres whose halves are physically or chemically,different -- ... when an alternating electrical field is applied to ... research, published in the Feb. 8, 2008, edition,of ...
... Feb. 29 Kendle (Nasdaq: KNDL ... today,announced that Vice President and Chief Marketing ... Annual Raymond James,Institutional Investors Conference. The conference ... Cypress in Orlando, March 2-5, 2008. Kendle,s,presentation ...
Cached Biology Technology:Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 2Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 3Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 4Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 5Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 6Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 7Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 8Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 9Stereotaxis Reports Fourth Quarter and Full Year 2007 Financial Results 10'Two-Faced' Particles Act Like Tiny Submarines 2'Two-Faced' Particles Act Like Tiny Submarines 3Kendle to Present at the 29th Annual Raymond James Institutional Investors Conference 2
...
Request Info...
... Conjugate, 2 ml. Streptavidin ... molecules for use in ... hybridization applications.High specificity reagents. ... & Detection, Protein Labeling ...
...
Biology Products: