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:12/5/2014)... PROVO, Utah , Dec. 4, 2014  Tute ... has raised $2.3 million in Series A1 funding led ... angel investors also participated in the investment round. ... as the healthcare community adopts next-generation sequencing and seeks ... disease," said Reid Robison , MD MBA, and ...
(Date:11/21/2014)... -- Earlier this year Donald Spector , Chairman of ... the most prolific inventors in the world, got a ... to third party agencies. Spector envisioned this technology even ... earliest known patents in this area. Now major technology ... care, elder care and hospital applications. This technology has ...
(Date:11/18/2014)... 17, 2014   News Highlights: ... to develop The Partners Data Lake, an agile ... Data Lake will allow researcher and clinicians to ... and the lives of patients , The ... activities across the Partners system, breaking down physical ...
Breaking Biology News(10 mins):Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5
... Described as a hotspot of botanical diversity, there are ... Several thousand of them are used by traditional healers ... of problems from the common cold to serious diseases ... are will be the focus of The International Center ...
... owners have a new weapon in their pest management ... kills its host, has proven to be quite effective ... tiny pest-devouring insects are considered to be powerful "biocontrol ... management applications. Jean Pierre Kapongo, Ph.D., an entomologist ...
... when you,ve reached the top of a mountain and you ... to plants and animals, as their habitats slowly shift to ... is you can,t go anywhere. Habitats shrink to the vanishing ... to be played out repeatedly and at an accelerating rate ...
Cached Biology News:Study of African traditional medicine will begin world-first clinical trial 2Study of African traditional medicine will begin world-first clinical trial 3Stanford researchers say climate change will significantly increase impending bird extinctions 2Stanford researchers say climate change will significantly increase impending bird extinctions 3Stanford researchers say climate change will significantly increase impending bird extinctions 4
(Date:12/19/2014)... Dec. 19, 2014  Roche (SIX: RO, ROG; OTCQX: ... Inc. (Bina), a privately held company based in ... Bina provides a big data platform for centralized ... data. Bina,s proprietary on-market Genomic Management Solution, Bina-GMS ... to perform fast and scalable analyses to maximize ...
(Date:12/19/2014)... (PRWEB) December 18, 2014 ... nation’s leading specialty pharmacies, has an expanded team ... clinical pharmacy consultants for prescriber offices in their ... , “We have a variety of Regional ... example, those specializing in hepatitis C help prescribers ...
(Date:12/19/2014)... Reports from CDC show approximately 117 ... or more chronic health conditions - including cardiovascular disease, ... of these diseases, but may not eliminate the severe ... implanted nerve stimulation devices today offer relief, they require ... induce side effects. , To eliminate the need ...
(Date:12/19/2014)... San Diego, CA (PRWEB) December 18, 2014 ... announces a limited time special on Sartorius Biohit ... 1 Free on mLINE pipettes, Picus Electronic Pipette Trade-in ... recommended by Health and Safety officers around the world. ... repetitive manual pipetting. Other features include:, , ...
Breaking Biology Technology:Roche acquires Bina Technologies and enters the genomic informatics market 2Roche acquires Bina Technologies and enters the genomic informatics market 3BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 2BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 3Draper Wins GSK Funding for Smaller, Smarter Implantable Devices 2Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2
... (Nasdaq: NTII ), today announced it will release,its ... September,16, 2008., The Company will also host a ... year-end call are as follows:, -- Date: ... ET, 9:30 a.m. CT, 7:30 a.m. PT -- ...
... Heightened interest in therapeutic efficiency, quality and safety of food ... the biotechnology market. Biopharmaceuticals is poised to experience spiraling growth ... stream of products presently in the pipeline. , ... ...
... Sinovac Biotech Ltd. (Amex:,SVA), a leading provider of ... Anflu(R), a seasonal influenza vaccine, for 2008-2009 Flu ... only split influenza,vaccine produced without preservatives in China. ... its established sales force to,promote the adult dosage ...
Cached Biology Technology:Neurobiological Technologies Announces Dates for 2008 Fiscal Year End Financial Results Conference Call and Presentation at MCF Investor Summit 2Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts 2Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts 3Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts 4Sinovac Launches Seasonal Influenza Vaccine Anflu(R) for 2008-2009 Flu Season 2Sinovac Launches Seasonal Influenza Vaccine Anflu(R) for 2008-2009 Flu Season 3
... Clean and Accurate Results Laser Capture ... the sensitivity and accuracy of molecular assays ... types and multi-cellular structures isolated from whole ... to microdissection-developed in 1996 at the National ...
... antibody raised against a partial ... Immunogen: ZFHX4 (NP_078997, 2 ... recombinant protein with GST tag. ... NM_024721 ...
... specificity and signaling of the members of ... modified by alternative splicing--which has important implications ... can perform a classical expression profiling and ... alternatively spliced forms of the gene that ...
... Alternative Splicing plays an important role in ... apoptosis and cell death. Splice variants have ... and inhibition of defined apoptotic pathways. With ... can perform a classical expression profiling and ...
Biology Products: