Navigation Links
Researcher provides tool to enable determination of age of anchovies with greater precision
Date:3/12/2008

under the leadership of Mr Andrs Uriarte. The PhD was defended at the Department of Zoology and Animal Cell Biology, obtaining summa cum laude.

Pablo Cermeo Villanueva is Doctor in Biology from the University of the Basque Country and President of the Basque AMBAR (Society for the Study and Conservation of Marine Fauna) and works for the World Wildlife Foundation (WWF).

Daily growth techniques

The application of daily growth techniques enables the discovery of aspects about growth and its relationship with the environment. The development of the technique in this current research will enable a clarification of when and how stock replacement by juvenile European anchovy in the Bay of Biscay occurs and understanding of the relationship between growth and mortality in the first phases of the development of the species.

Determining the age in days of the juveniles enables obtaining the distribution of these juveniles or survivors of the larval stage according to their month of birth; comparing this data, not only at an inter-annual level, but also showing the variations produced throughout the year their relation with the oceanographic conditions present at the different periods of the year.

The aim of the PhD thesis was to develop and apply this technique to the study and management of the European anchovy. To this end and by means of a series of experiments using chemical marking during captivity, for the first time the daily formation of growth rings in this species has been validated. The chemical marking was carried out, at least during short periods of captivity, using the soluble complex of calcium that both juvenile and adult anchovies deposit as a daily ring of growth in their otoliths.

The daily growth rings deposited in the otoliths form a complex pattern of daily growth which were analysed using both scanning electron microscopy (SEM) as well as optical microscopy with image analysing. In this way
'/>"/>

Contact: Irati Kortabitarte
iratik@elhuyar.com
34-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Researchers identify proteins involved in new neurodegenerative syndrome
2. Texas researchers and educators head for Antarctica
3. MGH researchers describe new way to identify, evolve novel enzymes
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
6. U of MN researchers discover noninvasive diagnostic tool for brain diseases
7. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
8. Researchers discover new strategies for antibiotic resistance
9. Researchers find new taste in fruit flies: carbonated water
10. Binghamton University researchers investigate evolving malaria resistance
11. Antioxidant to retard wrinkles discovered by Hebrew University researcher
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... developed a novel and versatile modeling strategy to simulate ... materials as well as for studying polyelectrolytes, including DNA ... model much larger and more complex polyelectrolyte systems, and ... lead author of a paper on the work and ... Science and Engineering. "This is a big step forward ...
(Date:8/20/2014)... ITHACA, N.Y. In a study of 158 pregnant ... the craving and intentional consumption of ice, cornstarch, ... items, reports a new Cornell study. , Moreover, such ... teens who did not eat nonfood substances. , Pregnant ... low hemoglobin, which can lead to iron deficiency and ...
(Date:8/20/2014)... Issue Serious allergic reactions to food ... for some children.    What you should know ... allergies and this number may be increasing, especially among children. ... have food allergies.  The symptoms of allergic ... breathing difficulties and loss of consciousness. Symptoms can also develop ...
Breaking Biology News(10 mins):Researchers develop models to study polyelectrolytes, including DNA and RNA 2Pica in pregnant teens linked to low iron 2Information Update - Allergens and food safety at school - What's in your child's lunch? 2Information Update - Allergens and food safety at school - What's in your child's lunch? 3
... Spanish . , The potentially deadly yellow-fever-transmitting ... a compound called octenol as one way to find a ... scientists report. Scientists have long known that mosquitoes can ... Joseph Dickens and Jonathan Bohbot explains in greater detail how ...
... American Institute of Biological Sciences (AIBS) has selected Meredith ... Davis, Ryan Richards, a graduate student at the University ... student at the University of Rhode Island, to receive ... "AIBS is committed to fostering a productive ...
... Spring Harbor, NY -- One seemingly insurmountable obstacle to the ... wheat and rice is the dependence of those plants on ... and egg -- combine randomly to generate a genetically unique ... But what if plants like these could be engineered ...
Cached Biology News:ARS study provides a better understanding of how mosquitoes find a host 2AIBS names emerging public policy leaders 2AIBS names emerging public policy leaders 3CSHL-Mexican team coaxes sexually reproducing plant to brink of asexual reproduction 2
(Date:8/21/2014)... On Wednesday of last week RENU 28, the world's ... became available for purchase in Australia and New Zealand, and ... 28 works is, if you think about the definition of ... cellular renewal within your body. If you think about the ... cellular renewal. What RENU 28 does is it works with ...
(Date:8/20/2014)... the first time, chemists have succeeded in measuring vibrational ... resolution. The study reveals how vibration of a single ... , The study was performed at the University ... the University of Jyvskyl works as a visiting fellow ... the study. The second team was lead by Professor ...
(Date:8/20/2014)... International Corporation (NASDAQ: PRXL ) announced today ... Conference in New York.  Ingo Bank , Senior ... a presentation on PAREXEL and discussing business developments at ... A live webcast of the discussion will be ... www.PAREXEL.com in the Upcoming Events portion of ...
(Date:8/20/2014)... health of your heart, researchers have discovered. , A ... TENS machine like those designed to relieve labour pains ... raised flap at the front of the ear immediately ... changed the influence of the nervous system on the ... failing hearts too hard. , Professor Jim Deuchars, Professor ...
Breaking Biology Technology:RENU 28 Skin Care Now Available in Australia and New Zealand 2Seeing a molecule breathe 2PAREXEL International To Present At Baird Healthcare Conference 2'Tickling' your ear could be good for your heart 2
... 14, 2012 AMPAC Fine Chemicals LLC (AFC), a ... APFC ), reports that it has joined Rx-360 ... biotech industry consortium that was founded by industry leaders ... and to assure the quality and authenticity of the ...
... 2012 Neuralstem, Inc. (NYSE Amex: CUR ) ... registered direct placement of 5,200,000 shares of common stock at ... with an exercise price of $1.02 per share and exercisable ... of five years. The company received aggregate gross proceeds of ...
... Ill., Feb. 13, 2012 Hospira, Inc.  (NYSE: ... injectable drugs and infusion technologies, today announced the hiring ... and compliance capabilities, including the appointment of Zena G. ... 2012. In this role, Ms. Kaufman will have overall ...
Cached Biology Technology:AMPAC Fine Chemicals Continues to Invest in Quality Systems 2AMPAC Fine Chemicals Continues to Invest in Quality Systems 3Neuralstem Announces Closing of $5.2-Million Registered Direct Offering 2Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 2Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 3Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 4Hospira Names Zena G. Kaufman Senior Vice President of Quality; Strengthens Quality and Compliance Capabilities With Addition of Top Industry Talent 5
... Ligase catalyzes the formation of a phosphodiester ... in nicked duplex DNA molecules or between ... complementary strand at 45 - 65?. Tfi ... much higher temperatures than conventional DNA ligases, ...
... a unique β-agarose digesting enzyme developed at ... DNA and RNA from low melting point ... TBE, MOPS, or phosphate buffers. The gel ... TBE, MOPS, and phosphate electrophoresis buffers or ...
... Perhaps sheer in-house demand is causing shortages ... precious antibody. This can cause unwanted distractions, ... Receive royalties for your hard work ... let us build it up,and market it ...
... PBL's bioassays for interferons are cytopathic effect ... assays. Sample types include; tissue culture supernatents; ... In these assays, one unit is defined as ... reduce the cytopathic effect of viral infection by ...
Biology Products: