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Evaluation of cryopreservation of fish and shellfish egg, embryos and larvae
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Roghayeh Mahmoudi *   , Easa Falahat , Roxana Fallahi |
| Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research Education and Extension Organization |
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Abstract: (860 Views) |
Number of attempts has been made to cryopreserve fish and shellfish gametes.
Success has been achieved to establish only sperm banks in case of some
commercially important fish. In shellfish, also particularly in shrimps, though the sperm
cryopreservation was successful; no attempts were made to develop sperm banks.
As far as cryopreservation of egg and embryos of fish and shellfish is concerned, less
research efforts were made with limited success. Number of reasons have been given
for the failure of egg/embryo cryopreservation and the main barriers speculated are low
membrane permeability in the eggs, the large yolk mass of the oocyte, and the presence
of compartments in early developing embryos. These factors result in ice crystal
formation during the freezing process. In addition, the oocytes and embryos are prone
to chilling injuries unrelated to ice crystal damage. There are number of other problems
reported by several researchers in the egg/embryo cryobanking protocols which are
elaborately discussed in the present paper. There is an urgent need to develop a viable
cryobanking technology for fish egg/embryos to enhance fish production in captive
condition. Attempts to cryopreserve larvae of aquatic animals are another challenge
occurring in the recent past. The aim of the present review is to collect comprehensive
information on the efforts so far made on fish and shellfish egg and embryo cryobanking;
and to assess the challenges in the development of viable technology and plan for future
research for making this technology viable and cost effective.
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| Keywords: Cryobanking, Fish, Shellfish, Egg, Embryos, Larvae |
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Full-Text [PDF 700 kb]
(136 Downloads)
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Type of Study: Applicable |
Subject:
Special
Received: 2022/07/17 | Accepted: 2023/03/30 | Published: 2023/03/30
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