Abstract

No consensus has been reached yet on the question whether horse mackerel has a determinate or an indeterminate fecundity. This problem has been discussed based on three main criteria: (a) oocyte size frequency distribution, (b) the number of yolked oocytes in the ovary and (c) atresia. The analysis of the oocyte size frequency distribution showed that no distinct hiatus could be observed between pre-vitellogenic and vitellogenic oocytes. The number of yolked oocytes in the ovary was found higher in imminent spawning ovaries than in the pre-spawing, while a greater number of late yolked oocytes was found in recently spawning ovaries than in the pre-spawning. High incidence of atresia was also found in recently spawning (6–22%) and spent ovaries (over 29%). Those findings indicate that horse mackerel has most probably an indeterminate fecundity.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.