File: <hygrobii.htm> [For teaching
purposes only; do not review, quote or abstract] Terminology <Principal
Natural Enemy Groups>
|
COLEOPTERA, Hygrobiidae Please refer also to the
following links for details on this group:
Hygrobiidae is a small family that is closely
related to Dytiscidae. They are
aquatic, living in ponds rather than streams. Food preferences of Hygrobia
hermani F. (= Pelobius tardus Hbst.) were studied by Balfour-Browne (1922a). Adults are found in mud at the bottom of
ponds, and females lay their eggs in rows on the submerged stems of aquatic
plants. The larvae feed on worms and
the immature stages of the less active aquatic insects. The mature larva leaves the water to
pupate, and forms a cells in the soil 5 cm. or more beneath the surface. A single generation occurs annually, and
overwintering is as adults in the mud at the pond bottom (Clausen 1940).
References:
Please refer to <biology.ref.htm>,
[Additional references may be found at:
MELVYL Library ] |