The reproductive biology and embryonic development of Mustelus higmani were examined between January 2015 and December 2016 in the south-eastern Caribbean. Captures comprised 813 females (23.2–72.5 cm TL), and 960 males (22.6–62.5 cm TL). The total length at 50% maturity was estimated as 47.8 and 47.5 cm for females and males, respectively. Uterine fecundity ranged from 1 to 8 embryos and ovarian fecundity between 1 and 9 vitellogenic follicles. The time of parturition and mating season of M. higmani may occur throughout the year, peaking between November and February. The presence of pre-ovulatory ovarian follicles along with advanced embryos indicates an annual reproductive cycle for female M. higmani. The main embryonic development stages were recorded in the samples, from uterine eggs (1 to 6 per female) to term embryos (23.0–26.0 cm TL). The transition between placental pre-implantation and post-implantation occurs when embryos have attained a TL of 5.0–6.0 cm. The observation of abundant uterine histotrophic secretions in late pregnant and post-partum females demonstrates that histotrophy may intensify close to birth in this species. The local population of M. higmani appears to have relatively high productivity; nonetheless, this species is heavily harvested and lacks management measures in the study area.

中文翻译：

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来自加勒比海东南部的小眼平滑猎犬（Mustelus higmani）的生殖生物学和胎盘营养胚胎发育

生殖生物学与胚胎发育野鼬鼠2015 年 1 月至 2016 年 12 月期间在加勒比海东南部进行了检查。捕获包括 813 名女性（23.2-72.5 cm TL）和 960 名男性（22.6-62.5 cm TL）。雌性和雄性在 50% 成熟时的总长度估计分别为 47.8 和 47.5 厘米。子宫生育力范围为 1 至 8 个胚胎，卵巢生育力范围为 1 至 9 个卵黄卵泡。分娩时间和交配季节希格马尼全年都可能发生，在 11 月和 2 月之间达到高峰。排卵前卵泡和晚期胚胎的存在表明女性的年度生殖周期希格马尼. 样本中记录了主要的胚胎发育阶段，从子宫卵（每只雌性 1 到 6 个）到足月胚胎（23.0–26.0 cm TL）。当胚胎达到 5.0-6.0 厘米的 TL 时，胎盘植入前和植入后之间的过渡发生。对妊娠晚期和产后女性大量子宫组织营养性分泌物的观察表明，该物种在接近出生时可能会加剧组织营养性。当地人口希格马尼似乎具有相对较高的生产力；尽管如此，该物种在研究区的收获量很大，缺乏管理措施。