obligate lecithotrophic live bearer


obligate lecithotrophic live bearer
a reproductive guild (q.v.) where eggs are fertilised internally and develop in the female until the end of the embryonic phase or later. There is no maternal-foetal nutrient transfer (yolk provides food). There is some specialisation for intrauterine respiration, excretion and osmoregulation. Weight decreases during embryonic development, e.g. Poecilia reticulata. See also facultative lecithotrophic live bearer

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • lecithotrophic live bearer — facultative and obligate lecitrophic live bearers (both q.v.) are two reproductive guilds (q.v.) …   Dictionary of ichthyology

  • facultative lecithotrophic live bearer — a reproductive guild (q.v.) where eggs are sometimes fertilised internally by accident when gonopores of otherwise oviparous fish are close together. Eggs may be retained in the female and some early development occurs there (rarely beyond… …   Dictionary of ichthyology


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