Facultad de Ciencias Marinas, Universidad de Colima, Km 19.5 Carretera Manzanillo Barra de Navidad, C.P. 28860, Manzanillo, Colima, Mexico.
Environ Sci Pollut Res Int. 2018 Aug;25(24):24064-24072. doi: 10.1007/s11356-018-2369-4. Epub 2018 Jun 8.
In order to evaluate the health of Plicopurpura pansa, a species considered vulnerable, a population of this gastropod living in proximity to the port of greatest cargo movement in Mexico was monitored seasonally during 1 year. Morphometric characteristics and sexual proportion were recorded. A macroscopic analysis was carried out to detect malformations and imposex; a histological analysis was performed to evaluate disseminated and gonadal neoplasias; the presence/absence in soft tissues of butyltin species (BTs) as possible contamination agents was also estimated. A total of 508 P. pansa specimens were collected. The largest specimens were obtained in winter. The coefficients of determination inside the port were low (R = 0.453). In general, there was a greater proportion of females than males throughout the year. Distinctive foot malformations (tumors) were recorded, but without signs of imposex. The histological examination confirmed the presence of disseminated neoplasias in the foot and gonads of P. pansa in the Port of Manzanillo. The comparative analysis of the morphological and histological features of the studied gastropod population allowed us to recognize impact patterns in relation to proximity to the port. There were high concentrations of monobutyltin (MBT) and greater abundance of tumors in heavier specimens; this was associated with port proximity zones. P. pansa could therefore serve as a sensitive bioindicator of environmental health in marine systems.
为了评估被认为易危的 Plicopurpura pansa 的健康状况，对墨西哥货物吞吐量最大的港口附近的这种腹足动物种群进行了为期 1 年的季节性监测。记录了形态特征和性比例。进行了宏观分析以检测畸形和雌雄同体；进行了组织学分析以评估弥散性和性腺肿瘤；还估计了软组织中是否存在作为可能污染剂的丁基锡物种 (BTs)。共采集了 508 个 P. pansa 标本。冬季获得的标本最大。港口内的决定系数较低（R=0.453）。总的来说，一年中雌性的比例大于雄性。记录到明显的足部畸形（肿瘤），但没有雌雄同体的迹象。组织学检查证实了曼萨尼约港 P. pansa 足部和性腺中存在弥散性肿瘤。对研究腹足动物种群的形态和组织学特征的比较分析使我们能够认识到与港口接近程度有关的影响模式。单丁基锡 (MBT) 浓度较高，并且在较重的标本中肿瘤的丰度较高；这与港口临近区有关。因此，P. pansa 可以作为海洋系统环境健康的敏感生物标志物。
