Understanding the Symbiotic Relationship between the Sea Urchin Loxechinus albus (Molina, 1782) and the Pea Crab Pinnaxodes chilensis (H. Milne Edwards, 1837): a Potential Parasitism.
Hans N Jaramillo, Luis P Salas-Yanquin, Joseline A Büchner-Miranda, Víctor M Cubillos, Jaime A Montory, Jan A Pechenik, Luis M Pardo, Oscar R Chaparro
{"title":"Understanding the Symbiotic Relationship between the Sea Urchin <i>Loxechinus albus</i> (Molina, 1782) and the Pea Crab <i>Pinnaxodes chilensis</i> (H. Milne Edwards, 1837): a Potential Parasitism.","authors":"Hans N Jaramillo, Luis P Salas-Yanquin, Joseline A Büchner-Miranda, Víctor M Cubillos, Jaime A Montory, Jan A Pechenik, Luis M Pardo, Oscar R Chaparro","doi":"10.6620/ZS.2023.62-18","DOIUrl":null,"url":null,"abstract":"<p><p>The echinoderm <i>Loxechinus albus</i> has a symbiotic relationship with the pinnotherid crustacean <i>Pinnaxodes chilensis</i>. Females of the crustacean develop in the terminal section of the sea urchin's digestive system, remaining there for life. This relationship has been suggested as commensalism. However, a potential negative impact on gonadal development and on the morphology of the sea urchin's digestive system suggest that it is instead parasitic. To study if there is a negative impact of the crustacean symbiont on the host, specimens of <i>L. albus</i> of all sizes were collected from a rocky shore in southern Chile. The gonadal and somatic tissues of sea urchins that were and were not harboring the pinnotherid were weighed and compared. Our results show that the presence of the pinnotherid was related to sea urchin gonads of lower biomass, decreased gonadosomatic index levels, and alterations in the morphology of the terminal portion of the host digestive system. The lower gonadal biomass suggests a negative impact on gamete production as well as a diversion of energy due to changes of the digestive system tissues and the potential consumption of algal food by the resident crustacean. These results suggest that the prolonged relationship between these two species is one of parasitism rather than one of commensalism.</p>","PeriodicalId":49331,"journal":{"name":"Zoological Studies","volume":"62 ","pages":"e18"},"PeriodicalIF":1.5000,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10318001/pdf/zoolstud-62-018.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zoological Studies","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.6620/ZS.2023.62-18","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/1/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"ZOOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The echinoderm Loxechinus albus has a symbiotic relationship with the pinnotherid crustacean Pinnaxodes chilensis. Females of the crustacean develop in the terminal section of the sea urchin's digestive system, remaining there for life. This relationship has been suggested as commensalism. However, a potential negative impact on gonadal development and on the morphology of the sea urchin's digestive system suggest that it is instead parasitic. To study if there is a negative impact of the crustacean symbiont on the host, specimens of L. albus of all sizes were collected from a rocky shore in southern Chile. The gonadal and somatic tissues of sea urchins that were and were not harboring the pinnotherid were weighed and compared. Our results show that the presence of the pinnotherid was related to sea urchin gonads of lower biomass, decreased gonadosomatic index levels, and alterations in the morphology of the terminal portion of the host digestive system. The lower gonadal biomass suggests a negative impact on gamete production as well as a diversion of energy due to changes of the digestive system tissues and the potential consumption of algal food by the resident crustacean. These results suggest that the prolonged relationship between these two species is one of parasitism rather than one of commensalism.
期刊介绍：
Zoological Studies publishes original research papers in five major fields: Animal Behavior, Comparative Physiology, Evolution, Ecology, and Systematics and Biogeography. Manuscripts are welcome from around the world and must be written in English. When the manuscript concerns the use of animals or specimens in research, a statement must be included to the effect that the author(s) has adhered to the legal requirements of the country in which the work was carried out or to any institutional guidelines.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
