Journal article Open Access

A study into parental assignment of the communal spawning protogynous hermaphrodite, giant grouper (Epinephelus lanceolatus)

Bright, David; Reynolds, Adam; Nguyen, Nguyen H.; Knuckey, Richard; Knibb, Wayne; Elizur, Abigail


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{
  "DOI": "10.1016/j.aquaculture.2016.03.013", 
  "author": [
    {
      "family": "Bright, David"
    }, 
    {
      "family": "Reynolds, Adam"
    }, 
    {
      "family": "Nguyen, Nguyen H."
    }, 
    {
      "family": "Knuckey, Richard"
    }, 
    {
      "family": "Knibb, Wayne"
    }, 
    {
      "family": "Elizur, Abigail"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2016, 
        3, 
        1
      ]
    ]
  }, 
  "abstract": "Parental contributions of giant grouper to communal spawns in captivity is important\nfor establishing genetic management of the species. In this study, we have followed\nthe spawning dynamics of three males and three females over 6-8 consecutive days,\nover three time periods. Polymorphic microsatellite markers were validated and\nutilised to successfully determine parentage in 574 offspring from 20 nights of\nspawns. Variation of both maternal and paternal contributions between nights in\nbatches of spawns were significant (P < 0.001). Most paternal assignments were\nattributed to one dominant male who initiated each spawning batch, however, all\nmales and females successfully mated over the spawning period. There was a\nsignificant (P < 0.01) trend towards a polygamous reproductive mode for giant\ngrouper: in two of the three batches of spawns where, on some nights, eggs from all\nfemales were fertilised by multiple males. Genetic variation was assessed between\nparents and offspring. There was a loss of alleles on each spawning night, however,\nif offspring from a series of consecutive nights were combined, most or all of the\ngenetic variation would be maintained in the F1 generation. This research validates\nthe molecular tools for genetic monitoring of giant grouper and also improves the\nunderstanding of spawning dynamics of protogynous hermaphroditic communal\nspawners over time in an aquaculture setting.", 
  "title": "A study into parental assignment of the communal spawning protogynous hermaphrodite, giant grouper (Epinephelus lanceolatus)", 
  "type": "article-journal", 
  "id": "1232168"
}
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