No detailed citation.
|Species||Development state||Trait||Primary Data||Secondary Data|
|Gasterosteus aculeatus||Male||Onset of spermatogenesis||September||['September']|
|Gasterosteus aculeatus||Male||Main spermatogenesis activity||In October the testes are to a large extent filled with spermatocytes and spermatids. Sepermatogenesis is completed in November-January||['January', 'October', 'November']|
|Gasterosteus aculeatus||Male||Maximum GSI value||The peak of the GSI is reached in October, about a mean of 1.4, up to 1.6, and is followed by a gradual decline until August when the lowest values are reached||1.4 percent|
|Gasterosteus aculeatus||Spawning conditions||Spawning season||May-June||['May', 'June']|