The objective of this study was to evaluate the population structure and reproductive biology of Persephona lichtensteinii and P. puncata off Sergipe, two common species found in the bycatch of shrimp trawlers. Four samples of 6 kg were collected monthly from trawlers based in Pirambu-Sergipe. All individuals of Persephona were separated, identified, and weighed (TW, total weight, g). Carapace length (CL, mm) and width (CW, mm) were measured, and the sex and stage of morphological maturity identified. A total of 312 individuals of P. lichtensteinii (174 females; 138 males) and 160 specimens of P. punctata (46 females; 114 males) were analyzed. The overall sex ratio differed from 1:1 for both species. Size and weight of Persephona lichtensteinii were lower than P. punctata. Females of P. lichtensteinii were larger and heavier than males, while P. punctata did not show this sexual dimorphism. Morphometric relationships (CL-CW and TW-CW) were different between sexes for both species. The size at first morphological maturity (CW_m) of P. lichtensteinii was 17.0 mm and 18.2 mm for females and males, respectively. For P. punctata, CW_m was 23.5 mm for females and 26.5 mm for males. At lower latitude, both maximum size (CW_max) and CW_m were lower, which may be associated with maintenance of the CW_m/CW_max ratio. The reproduction was continuous, with a peak in May–October for P. lichtensteinii. To the best of our knowledge, this is the first study analyzing the population structure and reproductive biology of these leucosiids in lower latitude regions along the Brazilian coast.

这项研究的目的是评估在虾拖网渔船副渔获物中发现的两种常见物种Sergipe的Persephona lichtensteinii和P. puncata的种群结构和生殖生物学。每月从位于Pirambu-Sergipe的拖网渔船收集四个6公斤的样本。分离，鉴定并称重Persephona的所有个体（TW，总重量，g）。测量了甲壳的长度（CL，毫米）和宽度（CW，毫米），并确定了形态成熟的性别和阶段。共有312名li.tensteinii个体（174名女性; 138名男性）和160个punctata的标本（46名女性； 114名男性）进行了分析。两种物种的总体性别比均不同于1：1。荔枝Persephona lichtensteinii的大小和重量均低于P. punctata。荔枝假单胞菌的雌性比雄性更大和更重，而点状假单胞菌未显示出这种性二态性。两种物种的性别之间的形态计量关系（CL-CW和TW-CW）不同。雌性和雄性的利氏假单胞菌的第一形态成熟度（CW _m）分别为17.0 mm和18.2 mm。对于P. punctata，雌性的CW _m为23.5 mm，雄性的CW _m为26.5 mm。在较低的纬度下，两个最大尺寸（_最大CW）和CW _m较低，这可能与维持CW _m / CW _max之 比有关。繁殖是连续的，在五月至十月的P. lichtensteinii达到高峰。据我们所知，这是第一项分析巴西沿海低纬度地区这些隐藻类的种群结构和生殖生物学的研究。