Estimation of minimum body length at spawning in the sergestid shrimp (Lucensosergia lucens) in Suruga Bay
2017
Washiyama, H. | Nakahiro, A. | Doi, W. | Suzuki, N.
During the assessment of resources in a daily egg production method (DEPM), information on the distinction and minimum body length of the spawning individuals are important. Using sergestid shrimp collected from June 25-26, 2013, we conducted a spawning experiment after selecting mature individuals capable of spawning based on the ovary color. Spawning was observed in more than half of the individuals that were judged as matured based on the method described above. Body lengths at maturity of individuals that spawned were similar. The effectiveness of the maturity criteria based on ovary color was confirmed. Furthermore, spawning was observed in an individual of length 29.6 mm, which was smaller than that of Lucensosergia lucens, estimated to be approximately 30 mm in a previous report.
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