Effects of the octopus fishery on the American horseshoe crab population in the Ría Lagartos Biosphere Reserve, Mexico

IF 0.5 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY

Ciencias Marinas Pub Date : 2020-06-26 DOI:10.7773/cm.v46i2.2992

J. S. Gío, G. A. Ramírez, Héctor Javier Ortiz León, R. Bustillos, Carmen Olivia Rosas Correa, José Manuel Castro Pérez

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引用次数: 5

Abstract

espanolSe ha documentado que la cacerolita de mar Limulus polyphemus se captura de forma ilegal para uso como carnada de Octopus spp. en algunas localidades de la peninsula de Yucatan, Mexico. Para conocer si la pesqueria de pulpo pudiese tener una influencia negativa en las poblaciones de este limulo, se muestrearon organismos de L. polyphemus 2 veces al ano, antes y despues del comienzo de la temporada anual de pulpo, durante 4 anos consecutivos (2015–2018) en Rio Lagartos y San Felipe, situados en la Reserva de la Biosfera Ria Lagartos (RBRL), Yucatan. Se trazaron cuadrantes perpendiculares a la vera del manglar y se midieron los parametros fisicoquimicos del agua (profundidad, temperatura, oxigeno disuelto, pH, salinidad y conductividad electrica), asi como la granulometria del sedimento marino (mediante el tamizado de Folk). Se registro el numero de individuos vivos, el numero de hembras y la longitud promedio. No se encontraron diferencias significativas en los parametros fisicoquimicos del agua ni en la sedimentologia registrada (P > 0.05). Los muestreos evidenciaron pocos organismos por sitioestudiado: 22 en Rio Lagartos y 24 en San Felipe, ambos resultados antes de iniciada la temporada de pulpo de 2017. En los muestreos poste-riores al inicio de la temporada de pulpo de 2018, solo se observaron 2 organismos en Rio Lagartos y ninguno en San Felipe. Los resultados evidenciaron una disminucion significativa en el numero de ejemplares vivos de L. polyphemus despues de iniciada la temporada de pulpo, asi como tambien una disminucion en la longitud promedio de los organismos, lo que sugiere un efecto negativo en las poblaciones de la cacero-lita de mar derivado de las actividades propias de la pesca del molusco. Se requieren mas estudios que integren otros factores fisicoquimicos, biologicos y socioeconomicos para dilucidar la potencial amenaza de esta pesqueria sobre las poblaciones de este limulo en la RBRL. EnglishThe American horseshoe crab, Limulus polyphemus, has been reported to be illegally caught for use as Octopus spp. bait in some localities of the Yucatan Peninsula, Mexico. To learn if the octopus fishery could be negatively influencing the limulus populations in the area,L. polyphemus individuals were sampled twice a year, before and after the annual octopus fishing season, over 4 consecutive years (2015–2018) in Rio Lagartos and San Felipe, both in the Ria Lagartos Biosphere Reserve (RLBR), Yucatan. Quadrants were drawn perpendicular to the mangrove edge, physicochemical parameters in the water (depth, temperature, dissolved oxygen, pH, salinity, and electrical conductivity) were determined, and granulometry of marine sediments was measured (Folk technique). The number of live specimens, number of females, and average length were recorded. No significant differences were found for the physicochemical properties of water or the recorded sedimentology (P > 0.05). Samplings revealed a low number of organisms per site: 22 in Rio Lagartos and 24 in San Felipe, both from data before the start of the 2017 octopus fishing season. In the samplings after the start of the 2018 octopus fishing season, only 2 organisms were observed in Rio Lagartos and none in San Felipe. The results showed a significant decrease in the number of live L. polyphemus specimens after the beginning of the octopus fishing season and a decrease in the average length of organisms, suggesting a negative effect of mollusk fishing activities on the horseshoe crab populations. More studies are required that integrate other physicochemical, biological, and socioeconomic factors to elucidate the potential threat of this fishery on L. polyphemus populations in the RLBR..

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章鱼渔业对Ría Lagartos生物圈保护区美洲马蹄蟹种群的影响

西班牙人记录说，在墨西哥尤卡坦半岛的一些地方，海鲎的平底锅被非法捕获，用作章鱼属的诱饵。为了了解章鱼渔业是否会对这种鲎的种群产生负面影响，在每年章鱼季节开始前后，每年在位于尤卡坦里亚蜥蜴生物圈保护区（RBRL）的里奥蜥蜴和圣费利佩连续4年（2015-2018年）采集两次多足类动物。绘制垂直于红树林边缘的象限，测量水的物理化学参数（深度、温度、溶解氧、pH值、盐度和电导率）以及海洋沉积物的粒度（通过Folk筛分）。记录了活个体的数量、雌性的数量和平均长度。在水的理化参数或记录的沉积学方面没有发现显著差异（P>0.05）。样本显示，每个研究地点的生物很少：里约蜥蜴22个，圣费利佩24个，这两个结果都是在2017年章鱼季节开始之前的结果。在2018年章鱼季节开始时的后期取样中，在里约蜥蜴中只观察到2种生物，在圣费利佩没有观察到任何生物。结果表明，章鱼季节开始后，多足类动物的活标本数量显著减少，生物的平均长度也有所减少，这表明软体动物捕捞活动对海鳗种群产生了负面影响。需要进行更多的研究，将其他理化、生物和社会经济因素结合起来，以阐明这种渔业对RBRL中这种边缘种群的潜在威胁。据报道，在墨西哥尤卡坦半岛的一些地方，美国马蹄蟹柠檬被非法捕获用作章鱼属的诱饵。为了了解章鱼渔业是否会对该地区的鲎种群产生负面影响，L。每年在每年的章鱼捕捞季节前后，在尤卡坦的Rio Lagartos和San Felipe连续4年（2015-2018年）采集两次Polyphemus个体。象限垂直于红树林边缘绘制，确定水中的物理化学参数（深度、温度、溶解氧、pH值、盐度和电导率），并测量海洋沉积物的粒度（民间技术）。记录了活标本的数量、雌性的数量和平均长度。在水的物理化学性质或记录的沉积学方面没有发现显著差异（P>0.05）。样本显示，每个地点的有机物数量很少：里约蜥蜴22种，圣费利佩24种，均来自2017年章鱼捕鱼季节开始前的数据。在2018年章鱼捕捞季节开始后的样本中，里约蜥蜴只观察到2种生物，圣费利佩没有观察到。结果表明，活的L.Polyphemus标本在章鱼捕捞季节开始后显著减少，平均生物长度减少，表明软体动物捕捞活动对马蟹种群产生了负面影响。需要进行更多的研究，将其他理化、生物和社会经济因素结合起来，以阐明这种渔业对长鳍金枪鱼的潜在威胁。长鳍金枪鱼种群。。

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来源期刊

Ciencias Marinas 生物-海洋与淡水生物学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： A bilingual open-access publication, Ciencias Marinas (CM) is an international peer-reviewed journal that contains original research findings in all areas of marine science. It is published quarterly by the Autonomous University of Baja California, Mexico, and all its contents are publicly available on our journal website. Though a limited number of copies are still printed, the journal is mainly distributed in its electronic format. CM was conceived in 1973 as part of an academic project aimed to entice local researchers to publicly disclose their findings by adopting the culture of peer-review publishing. This academic project evolved into an international journal after accepting papers from researchers in the United States and, eventually, other parts of the world. Because of the diversity in authorship, CM issues were initially published in either Spanish or English, and occasionally in both languages. It was not until 1984 when CM included both language versions of all its contents, and it then became the fully bilingual journal it still is today. At CM we believe our inclusive format allows us not only to address a wider range of submissions from international authors but also to make published findings available to a wider international audience. So whether you are looking for information on the redfish in Icelandic waters or the physical and biological properties of the Gulf of California, feel free to peruse CM contents. You may find them to provide source material for your research.