Abstract
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.
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