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The reproductive cycle of Scolelepis goodbodyi (Polychaeta, Spionidae)

机译：Sbodyelepis goodbodyi（Polychaeta，Spionidae）的生殖周期

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摘要

The aim of this study was to examine the reproductive and gametogenic cycle of the spionid polychaete Scolelepis goodbodyi (Jones). Every 15 days, in the upper level of the intertidal zone on Barequecaba Beach in southeastern Brazil, a 100 m~2 area was delimited and within it three points were selected and sampled using a core sampler 0.01 m~2 in area x 0.2 m long. Each sample was divided into three sub-samples: surface (2 cm) and middle (8 cm), which were sieved through 0.5, 0.25 and 0.125 mm mesh sieves; and lower (10 cm), sieved through 1.0 and 0.5 mm mesh sieves. Males, females and undetermined individuals were separated, and the width of the third setiger was measured. The gonadal development of each individual was classified based on external features of the gametogenic setigers. Ten to 20 adults from each sampling period were classified according to their gonadal development stage and then analyzed histologically for gametogenic studies, for comparison with the former classification. Some of the ripe females were used for fecundity evaluation. The diameters of the oocytes were measured prior to spawning. Eight hundred and twenty-eight females (29.70%), 848 males (30.42%) and 1,112 undetermined individuals (39.89%) were analyzed. The sex ratio did not differ significantly from unity (χ~2 = 0.24; df =1; P < 0.05). Males and females were more abundant in May 2002 (ca. 80%) and between November 2002 and May 2003 (between 77 and 90%); the proportion of undetermined individuals did not represent recruitment alone, but also a high incidence of adults with recovering gonads. Fecundity varied from 134 oocytes in a 0.54 mm W3 individual to 289 oocytes in a 0.4 mm W3 individual, with a mean of 220 (SD = 57) oocytes per female and 19 (SD = 5) oocytes per gametogenic setiger. Oocytes were ellipsoid, and ranged in size from 150 x 80 (to 220 x 120 μm (mean ± SD = 173 x 113 ± 15 x 11 μm). Neither a well-defined gametogenic cycle nor synchrony in the reproductive period was observed, because many gonadal development stages occurred in each month. Nevertheless, peaks of maturity were observed between October-December 2002 and April-May 2003.
机译：这项研究的目的是检查假性多毛chaScolelepis goodbodyi（Jones）的生殖和配子发生周期。每隔15天，在巴西东南部的Barequecaba Beach潮间带上层划定一个100 m〜2的区域，并在其中选择三个点，并使用0.01 m〜2的岩心采样器进行采样，其面积x 0.2 m长。每个样品分为三个子样品：表面（2厘米）和中间（8厘米），分别用0.5、0.25和0.125 mm筛孔筛分；下部（10厘米），通过1.0毫米和0.5毫米的筛网过筛。将男性，女性和不确定的个体分开，并测量第三只设定者的宽度。根据配子制定者的外部特征，将每个人的性腺发育分类。每个采样期的10至20位成人根据其性腺发育阶段进行分类，然后进行组织学分析以进行配子生成研究，以与前一分类进行比较。一些成熟的雌性用于生殖力评估。在产卵之前测量卵母细胞的直径。分析了828名女性（占29.70％），848名男性（占30.42％）和1,112名不确定者（39.89％）。性别比与统一无显着差异（χ〜2 = 0.24； df = 1； P <0.05）。 2002年5月（约80％）和2002年11月至2003年5月（77％至90％）的男性和女性更为富裕；未定个体的比例不仅仅代表征募，而且性腺恢复的成年人也很高。产卵量从0.54毫米W3个体的134个卵母细胞到0.4毫米W3个体的289个卵母细胞不等，平均每个雌性卵母细胞为220个（SD = 57）卵母细胞，每个配子体设定者为19个（SD = 5）卵母细胞。卵母细胞为椭圆形，大小为150 x 80（至220 x 120μm（平均±SD = 173 x 113±15 x 11μm）），未观察到明确的配子周期或生殖期同步性，因为每个月都有很多性腺发育阶段，但在2002年10月至12月至2003年4月至5月之间观察到了成熟期的高峰。

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