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Annual reproductive cycle of sea cucumber Holothuria (Halodeima) atra Jaeger (Holothuroidea : Aspidochirota) at Tuticorin, Southeast coast of India

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Relation http://eprints.cmfri.org.in/7143/
 
Title Annual reproductive cycle of sea cucumber Holothuria (Halodeima) atra Jaeger (Holothuroidea : Aspidochirota) at Tuticorin, Southeast coast of India
 
Creator Ram Mohan, M K
 
Subject Seacucumber
Theses
 
Description Knowledge on population parameters is a pre-requisite for the rational
management of holothurians. Infonnation on the various species is scarce despite
their abundance and size, which qualify them as a significant component of the benthic
macrofauna of lagoon and coral environments. The reproductive biology studies of
sea cucumbers are of great importance in understanding the annual breeding season,
recruitment panems and stock enhancement in the natural environment. Likewise, it
also helps in establishing a hatchery system to produce seeds. Induced spawning
could be achieved through thennal stimulation for seed production. This enhances
importance of a species for mariculture activities, where adequate seed supply
is an important criterion.
Seasonal reproduction is a mode associated with the storage of gametes.
followed by subsequent release in a mass spawn-Qut. It implies a non-random
allocation of resources to reproductive activities in relation to environmental
and biological inputs.
Holorhuria arra is one of the commonest sea cucumbers in the tropical
waters. It is well distributed in the Indo-West Pacific. Oriental and Australian regions.
In India, it is reported from the Gulf of Kutchh, Bombay (Mumbai), Ramagiri , Goa.
Karwar, Quilon, Vizhinjam , Kanyal.:urnari, Gulf of Mannar, Palk Bay, Madras
(Chennai) , Visakhapamam, the Lakshadweep islands and the Andaman and Nicobar
islands. This species occurs in shallow waters in good densities. In Tuticorin port
region, about 5-8 specimens could be found in 10 sq. m. area.
Many holothurians possess saponin-based toxin In their body. The degree
of toxicity varies with each species. This toxin is found to inhibit bacterial and fungal
action. When H. arra is handled in live condition. a red toxin known as
holothurin, stains hand. Rao er at. (l985a and b;1991) states that the toxins of
H. arra are of biomedical importance, since they exhibit anti-rumoural, anti-fertility
and anti-cancerous properties. The toxins proved lethal for unwanted organisms in
culture ponds during the experiments conducted by James (1986a). The significance
of the toxins of H. arra in biomedical research enhances the potential commercial
importance of the species. Many holothurian toxins are found to inhibit bacterial
and fungal action.
 
Date 2001
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7143/1/TH-95_Ram.pdf
Ram Mohan, M K (2001) Annual reproductive cycle of sea cucumber Holothuria (Halodeima) atra Jaeger (Holothuroidea : Aspidochirota) at Tuticorin, Southeast coast of India. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Central Institute of Fisheries Education, Versova.