ABSTRACT

Lolliguncula diomedeae is captured incidentally in the by-catch of the shrimp trawl fishery, however, there is little information about its life history. Therefore, data on reproductive indicators were collected in this study to evaluate the reproductive biology of L. diomedeae in the Gulf of Tehuantepec. A total of 1525 specimens, 1354 females with dorsal mantle length (ML) ranging from 18.9 to 90.3 mm and 171 males with 29.2 to 63.1 mm ML. The sex ratio was 8:1 females/males, with two reproductive peaks, one more intense in November and the other moderate in May. The first maturity size (L50) for females was 66.65 and 40.79 mm in males. The histological analysis showed five stages of development: pre-vitellogenesis, vitellogenesis, post-vitellogenesis, spawning, and post-spawning; with the simultaneous presence of oocytes at different stages. In relation to the results found and the consistent presence of post-ovulatory follicles and oocytes of different sizes and developments, we can infer that L. diomedeae is a multiple reproducer, as it spawns in batches in different periods of time in the study area, which can be considered as an adaptation strategy in response to regional environmental changes.

摘要

Lolliguncula diomedeae偶然被捕到虾拖网渔业的副渔获物中，但是，关于其生活史的信息很少。因此，在这项研究中收集了有关生殖指标的数据，以评估双色乳杆菌的生殖生物学。在蒂万特佩克海湾。总共1525个标本，其中1354具雌性的背壳长度（ML）为18.9至90.3 mm，而171具雄性的标本为29.2至63.1 mm ML。男女之比为8：1，有两个生殖高峰，一个在11月更加剧烈，另一个在5月中等。雌性的第一成熟度大小（L50）为66.65毫米，雄性为40.79毫米。组织学分析显示发育的五个阶段：卵泡形成前，卵黄发生，卵泡形成后，产卵和产卵后。在不同阶段同时存在卵母细胞。关于发现的结果以及不同大小和发育的排卵后卵泡和卵母细胞的一致存在，我们可以推断出双歧乳杆菌 是一个多重繁殖者，因为它在研究区域的不同时间段中分批产卵，可以将其视为对区域环境变化的适应策略。