The term 'morphology' refers to two branches of Biology, one dealing with the shape and structure of organs or other parts of organisms, and the other with the shape and structure of an organism as a whole. whole.
Similarly, the MORPHOLOGY table aims to accomplish two related purposes:
i. provide standardized concise descriptions of fish included in FishBase to make them comparable; and
ii. allow the rapid identification of the species thanks to the characters indicated in (i).
In fish, the main characters used for description and identification are descriptive attributes, which refer to distinguishing characters (e.g., caudal fin shape), morphometric measurements, which refer to continuous numeric variables (e.g., head length versus body length) or meristic counts, which refer to discrete numeric variables (e.g., number of soft and spiny rays for the dorsal fin).
The MORPHOLOGY table contains textual characters in multiple-choice fields, and morphometric and meristic characters in numeric fields. It is mainly meristic characters that are used for rapid identification, following the process established for databases by Froese and Papasissi (1990). The structure of the MORPHOLOGY table and the choices available in the fields result from an in-depth study of major works in ichthyology (eg, Lagler et al . 1977) and consultation with many colleagues. Some of the terms used in the table are very specialized, their definition can be found in the Glossary.
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