Related to the donnor fish
and codified in days. Here, a year contains 365 days. It is
possible to use years in the query by clicking on the checkbox. Note that fish maximum age may
vary greatly between species.
> All Related Images:
In the individual results page it is possible to obtain a general view of all otolith images
related to that species. If clicked a new page opens showing all otoliths ordered by Fish Length
that contains general information about the source of information. Usually it contains data on
the oceanographic cruise from which the donnor fish
was sampled, locality
of the collection, the name of scientist who provided the specimen, etc.
> Common name
refered to the english common name of species as adopted by FAO.
The collected date
of the donnor fish
. Expressed in mm/dd/yyyy
> Donnor Fish:
specimen from which the otolith has been extracted.
> Fish ID:
database code that identifies a register. When clicked in the Search Results table a new page is
openned showing data corresponding to that sample.
> Institute Code:
Institution that provides samples to this database has an unique code number to its specimens
that allows to rapidly locate the otolith specimen. This is a search tool specifically designed
for official providers of this database.
> Fish Length:
the donnor fish
given in milimeters (mm). Note that, in this data
base there exist several lengths, please see Type
for more details.
where the donnor fish
was captured. Location is codified in 10º Marsden
Squares numbering system as used in oceanographic data. The system starts with the lower-right
(SE) corner of square 1 at the equator and proceeds west from 0° longitude, spiraling up through
each zone of latitude to 288 at 70°N, 10°E. Then following a gap in numbering from 289 through
299, it begins again just below the equator with square 300, and proceeds west from 0° longitude
down through each zone of latitude to 623 at 90°S, 10°E. Finally, following yet another gap from
624 through 900, it begins again with squares 901 through 936 numbered westward from 0°
longitude at 80°N latitude.
Each 10º Marsden Square can be subdivided into 4 squares of 5º each, numbered from bottom left
to upper right in eastern longitudes and from bottom right to upper left in western longitudes.
Examples from Database:
145;2= Marsden Square number 145 and subdivision 2 corresponds to Northeast Atlantic (Galician
144;3= Marsden Square number 144 and subdivision 3 corresponds to South of Balearic Sea.
A world map showing Marsden Squares and examples of subdivisons can be viewed here
No available data.
> Related otoliths:
the individual results page, a list of related otoliths belonging to the same species is given.
They are referenced by a pair of number, the second one being in parenthesis. The first number
correspond to the Fish ID
and the second number is the associated length
of the donnor fish
. For example a pair,
20(330) indicates Fish ID 20 (Diplodus puntazzo
) of 330 mm length. You may clik on it to
go to that register.
If clicked in search
form, all fields will be erased.
In individual register
results page it is possible to download additional information related to the specimen: a full resolution
otolith image in TIFF format; otolith contour numerical data based in x/y points; otolith shape analysis
including Elliptic Fourier Analysis (EFA) and Wavelets numerical data; and the otolith morphometries and
indexes. Otolith Morphometry parameters are:
Area (Oa): The total area of the otolith in millimeters
Perimeter (Op): The total length of the perimeter in
Length (Ol): The length of the otolith longest axis
expressed in millimeters (mm).
Width (OW): The greatest width of the otolith measured
perpendicularly from the longest axis and expressed in millimeters (mm).
Otolith indexes are described below:
Aspect ratio= OW/Ol. Is the relationship between
otolith width (OW) and otolith length (Ol).
Otolith relative length=100*(Ol/Fl). Expresses in
percentage the length relationship between otolith and fish.
Otolith relative size=0.36 (1000*(Oa/Fl2). Expresses
the size (based on otolith area) relationship between otolith and fish.
The results also give graphic information of contour, EFA and Wavelets.
> Scientific name:
database it is possible to search otoliths using these taxonomic
Scientific name: using complete genus and
species. Results of that query will be related only to that species.
Genus will generate a search results table related to all species belonging to that genus stored
Species: like "scientific name",
results will be related only to that species.
Family: choosing a Family will generate a
search results table related to all species belonging to that family stored in database.
For better results, it should be used one
of these four search fields. Note that
if a wrong combination of taxonomic names is choosen, an error message will appear. (Ex: In
Family=Sciaenidae, Genus=Diplodus and Species=puntazzo, no results will be obtained, because,
belongs to Sparidae family).
Organisms are ordered and classified in a hierarchical system following their
suposed natural relationships. Different hierarchical levels receive the name of Taxons. The
basic taxon is the scientific (or taxonomic) name in Latin composed of a Genus and a Species
(Ex: Diplodus puntazzo
). A Genus (Diplodus
) can contain more than one species (puntazzo
). The next taxonomic level over Genus is Family, every Family have different
genus and species (Ex: Diplodus puntazzo
belongs to family Sparidae). The taxons are
stablished following N.Y.Nelson, 1994, in "Fishes of the World", 3rd Ed. John Wiley & Sons, New
Related to the donnor fish
. There are different ways of measuring the fish length,
depending on species, sample type, etc. They are internationally accepted and in this database
are codifed as: SL
=Standard length; TL
=Total length; FL
=Furca length; PL
=Head length. The meaning of each length type is explained in the image