Record Details

On captive breeding, spawning, embryonic and larval development in Horse conch, Pleuroploca trapezium (Linnaeus, 1758) from Southeast coast of India

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Title On captive breeding, spawning, embryonic and larval development in Horse conch, Pleuroploca trapezium (Linnaeus, 1758) from Southeast coast of India
 
Creator Jagadis, I
Kavitha, M
Prabu, D Linga
Padmanathan, J
 
Subject Captive breeding
Endangered
Larval rearing
Marine gastropod
Metamorphosis
Threatened and protected species
 
Description 795-801
Captive breeding, spawning and larval development of endangered gastropod, horse conch, Pleuroploca trapezium
(Linnaeus, 1758) was studied and reported from Thoothukudi, Southeast coast of India for the first time. Wild collected
brooders of P. trapezium were spawned after 10 months of rearing under captivity as a cluster of egg cases on the wall of the
tank and also above the shell of the other horse conch. Each egg case had 150 to 460 numbers of eggs. The incubation period
ranged from 23 to 30 days and 91 % of hatching was recorded. Detailed observations were made on the embryonic development
and larval rearing until 40 days of post hatch (dph). The day one larvae measured 750±14.15 μm and reached an average shell
size of 1830±37.48 μm after 40 dph. After 30 dph, though most of the pre-juveniles settled and crawled at the bottom of the
rearing tank, the presence of active velum indicated that the competency to metamorphosis for the development of juvenile was
not fully attained and complete mortality occurred. Therefore, further study is warranted using different cues to promote the
metamorphosis of Pleuroploca trapezium for successful life cycle closing and juvenile production.
 
Date 2022-03-03T04:48:00Z
2022-03-03T04:48:00Z
2021-10
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscair.res.in/handle/123456789/59259
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJMS Vol.50(10) [October 2021]