After years involved in supporting shrimp exports and 12 years after the introduction of the exotic vannamei species the MPEDA in India go upstream into quarantining imports.
Good move – with Black Tiger also a possibility to import.
Now here is the biz – BT are closed thelycum and hold fertilized eggs inside theire bodies unlike vannamei whose eggs get fertilized on leaving the body.
In West Africa plenty of gravid females and many cannot spawn because areas where they want to spawn tend to have very high total dissolved solids.
SO the females hold back spawning and just grow while searching for ideal place to spawn. In this same fashion gravid BT females could enter and be held in a quarantine situation (but with a high TDS – artificial fine silt works) until an MPEDA (or OIE) approval is obtained against required pathogens.
Then gravid BT released into clear water (still controlled) indoor spawning tanks in separate bio-securely run facility (to exclude entry of disease).
Of course same could happen in US or with any other origin/species.
A heat-stable microparticle platform for oral micronutrient delivery
Getting more specific targeted.
Prawns keep an eye….
……broodstock feed “chucki” delivery.
…and I don’t mean age but male ejaculation. Yes 21 a month is the magic number to reduce cancer risks as in Spanish health article this past Friday.
Now for vannamei shrimp we know that sperm sacs, after ejaculation or removal for artificial insemination (AI), take around 10 days to regenerate.
Viability of new sperm is better if male vannamei shrimp are kept at lower temperatures during regeneration.
Interestingly when the natural growth plateau in culture hits also around the time one can noting male sperm sacs forming although sexual differentiation can be noted earlier.