The Rasptail skate Rostroraja velezi is commercially exploited in artisanal elasmobranch fisheries along the west coast of Baja California Sur, Mexico, but information on its life history is limited. This study aimed to investigate the reproductive biology of R. velezi. A total of 105 specimens were caught from April 2008 to May 2012, including the largest reported specimen with 121 cm total length, 96 cm disc width (DW ). Females attained larger sizes than males. Males and females presented functional gonads. There was an asymmetry in the testes of males, with the left testis being larger. Histological analysis of the reproductive biology of R. velezi was performed here for the first time. The presence of sperm storage in females, and spermatogenic development beginning at the first stages of maturity in males was recorded. It was possible to identify the development of secretions in the club, baffle, and terminal zone of the oviducal gland. DW at maturity, defined as the DW at which 50% of the population is mature, was estimated at 68-72 cm for females and 65.1 cm for males. Egg-bearing females caught in April and May presented one egg capsule per uterus. Furthermore, a description of the egg capsule of R. velezi is provided. Elucidating the reproductive cycle, the type of reproductive strategies, and the fecundity of R. velezi will allow us to understand the impact of fisheries on this species.

中文翻译：

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Rasptail skate Rostroraja velezi (Rajiformes: Rajidae) 的生殖生物学

Rasptail skate Rostroraja velezi 在墨西哥南下加利福尼亚州西海岸的手工弹鳃渔业中被商业开发，但关于其生活史的信息有限。本研究旨在调查 R. velezi 的生殖生物学。2008 年 4 月至 2012 年 5 月共捕获 105 个标本，其中最大的报道标本总长 121 厘米，盘宽 (DW) 96 厘米。女性比男性获得更大的尺寸。雄性和雌性呈现功能性性腺。男性睾丸不对称，左侧睾丸较大。R. velezi 生殖生物学的组织学分析在这里首次进行。记录了女性精子储存的存在，以及男性在成熟的第一阶段开始的生精发育。可以确定输卵管、挡板和输卵管末端区分泌物的发育。成熟时的 DW，定义为 50% 人口成熟时的 DW，估计雌性为 68-72 厘米，雄性为 65.1 厘米。4 月和 5 月捕获的产卵雌性每个子宫有一个卵囊。此外，还提供了 R. velezi 卵胶囊的描述。阐明繁殖周期、繁殖策略的类型和 R. velezi 的繁殖力将使我们能够了解渔业对该物种的影响。4 月和 5 月捕获的产卵雌性每个子宫都有一个卵囊。此外，还提供了 R. velezi 卵胶囊的描述。阐明繁殖周期、繁殖策略的类型以及 R. velezi 的繁殖力将使我们能够了解渔业对该物种的影响。4 月和 5 月捕获的产卵雌性每个子宫有一个卵囊。此外，还提供了 R. velezi 卵胶囊的描述。阐明繁殖周期、繁殖策略的类型和 R. velezi 的繁殖力将使我们能够了解渔业对该物种的影响。