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Progressive increases in testis width, epididymis head width, plasma testosterone (T) concentrations, and occurrence of mature spermatozoa were observed in male <jats:italic>S. tiburo<\/jats:italic> from June to September, demonstrating that spermatogenesis occurs during the summer. Nonetheless, increases in maximum follicle diameter, oviducal gland width, plasma 17\u03b2\u2010estradiol and T concentrations, and occurrence of vitellogenic follicles were not observed in mature females until between October and April, demonstrating non\u2010synchronous patterns of gametogenesis in males and females. Fresh copulatory wounds were observed in females collected during late September along with histological evidence for sperm presence in the oviducal gland between September and April, confirming a 6\u2010 to 7 month period of female sperm storage. Ovulation occurred between mid\u2010April and early May in concert with increases in female plasma progesterone concentrations. Gestation occurred during a 4.5\u2010 to 5 month period between May and early September, and 97% of mature females collected during this period were gravid, indicating a highly synchronized, annual reproductive periodicity. Brood size was significantly correlated with maternal size and ranged from 1 to 13 pups with a mean\u2009\u00b1\u2009<jats:sc>S.D.<\/jats:sc> of 8.1\u2009\u00b1\u20092.2, which was significantly lower than reported in Gulf of Mexico (GOM) populations. The occurrence of non\u2010fertile offspring was observed in 17% of broods with a range of 1\u20137 non\u2010fertile eggs present in individual females. Thus, as previously reported in GOM <jats:italic>S. tiburo<\/jats:italic>, this unusual form of infertility also appears to be prevalent in the NWA population and requires further study. This study has demonstrated meaningful differences in reproductive biology of these populations, emphasizing the need for region\u2010specific approaches for population management.<\/jats:p>","DOI":"10.1111\/jfb.14537","type":"journal-article","created":{"date-parts":[[2020,9,28]],"date-time":"2020-09-28T18:18:51Z","timestamp":1601317131000},"page":"1733-1747","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Reproductive cycle and fecundity of the bonnethead <scp><i>Sphyrna tiburo<\/i> L.<\/scp> from the northwest <scp>Atlantic Ocean<\/scp>"],"prefix":"10.1111","volume":"97","author":[{"given":"Melissa","family":"Gonzalez De Acevedo","sequence":"first","affiliation":[{"name":"University of North Florida  Jacksonville Florida USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bryan S.","family":"Frazier","sequence":"additional","affiliation":[{"name":"South Carolina Department of Natural Resources  Charleston South Carolina USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carolyn","family":"Belcher","sequence":"additional","affiliation":[{"name":"Coastal Resources Division, Georgia Department of Natural Resources  Brunswick Georgia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4716-518X","authenticated-orcid":false,"given":"James","family":"Gelsleichter","sequence":"additional","affiliation":[{"name":"University of North Florida  Jacksonville Florida USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,9,28]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.6061\/clinics\/2013(Sup01)05"},{"key":"e_1_2_7_3_1","unstructured":"Belcher C. 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