J. S. Gío, G. A. Ramírez, Héctor Javier Ortiz León, R. Bustillos, Carmen Olivia Rosas Correa, José Manuel Castro Pérez
{"title":"Effects of the octopus fishery on the American horseshoe crab population in the Ría Lagartos Biosphere Reserve, Mexico","authors":"J. S. Gío, G. A. Ramírez, Héctor Javier Ortiz León, R. Bustillos, Carmen Olivia Rosas Correa, José Manuel Castro Pérez","doi":"10.7773/cm.v46i2.2992","DOIUrl":null,"url":null,"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..","PeriodicalId":50702,"journal":{"name":"Ciencias Marinas","volume":" ","pages":""},"PeriodicalIF":0.5000,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ciencias Marinas","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.7773/cm.v46i2.2992","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
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..
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.
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