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Measurements included carapace width and length, abdomen width and length, propodus length, dactylus length, and body weight across 60 sexed samples. Females typically show larger body size than males, while males reach greater total body weight. Allometric regression models describe how soft tissue content or total weight changes relative to carapace width or length, reflecting general scaling trends with body size.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/morphometric-analysis-of-the-red-frog-crab-curacha-ranina-ranina-from-balut-island-a-study-of-sex-related-morphometric-characteristics/141489/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/morphometric-analysis-of-the-red-frog-crab-curacha-ranina-ranina-from-balut-island-a-study-of-sex-related-morphometric-characteristics/141489.png","ImageObject",300,407,{"name":92,"@type":93},"Oliver","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-09-18","2026-08-25",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the main objective of the study on Ranina ranina from Balut Island?","Question",{"text":112,"@type":113},"To investigate and establish correlations among morphometric characteristics between female and male Ranina ranina, including body size traits and body weight relationships.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which morphometric variables were measured for the crabs?",{"text":117,"@type":113},"Carapace width and length, abdomen width and length, propodus length, dactylus length, and body weight were assessed from 60 sexed samples.",{"name":119,"@type":110,"acceptedAnswer":120},"How do female and male crabs differ in body size and weight in this study?",{"text":121,"@type":113},"Females generally have larger body size, whereas males can attain higher total body weight, consistent with differences in growth patterns and maturity.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},141489,1787657442,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":34,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":36},8796095461610,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","MORPHOMETRIC ANALYSIS OF THE RED FROG CRAB “CURACHA”RANINA RANINA FROM BALUT ISLAND, SARANGANI, DAVAO OCCIDENTAL  \nMICHELLE M. ELEMINO  \nSouthern Philippines Agri-Business and Marine and Aquatic School of Technology, Institute of Fisheries and Marine Sciences  \n[Corresponding Authors: michellemelemino@spamast.edu.ph](Corresponding Authors: michellemelemino@spamast.edu.ph)  \nABSTRACT  \nArticle History  \nReceived: 12 March 2019  \nRevised: 20 August 2019  \nAccepted: 15 December 2019  \nPublished: 30 January 2020  \nKeywords—morphometric, Ranina ranina, relationships  \nThe morphometric character relationships of females and males of the red frog crab Ranina ranina, locally known as “curacha,”from Balut Island, Sarangani, Davao Occidental, were the primary goal of this study. The carapace width (CW), carapace length (CL), abdomen width (AW), abdomen length (AL), propodus length (PL), dactylus length, and body weight were assessed. A total of 60 samples were sexed based on the shapes ofthe abdomens  \nand examined in the laboratory. At the same time, the species’ body weight was also measured. Most females of R. ranina have a larger body size than males. This is due to differences in growth patterns, food availability, and size of maturity. In terms of body weight, females of R. ranina are typically smaller, reaching a maximum of 400 g, whereas males can attain a total body weight of up to 900 g. It is important to note that males must be large enough to dig female crabs out of the sand to reproduce successfully.The allometric regression model describes changes in soft tissue content (or total animal weight for crustaceans) relative to carapace width or length. This result is consistent with  \n© M. M. Elemino (2020). Open Access. This article published by SPAMAST Research Journal is licensed under a Creative Commons Attribution-Noncommercial 4.0 International (CC BY-NC 4.0). You are free to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material). Under the following terms, you must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. To view a copy of this license, visit: [https://creativecommons.org/licenses/by-nc/4.0/](https://creativecommons.org/licenses/by-nc/4.0/)  \nPeer Reviewed Journal  \nthe general trends of scaling with body size in animals.  \nINTRODUCTION  \nRanina ranina (red frog crab or spanner crab) is a species of crab found throughout tropical and subtropical habitats. It is often fished for its meat and is the only known species in its genus. They inhabit depths of 10–100 meters (33–328 ft) on sandy-smooth substrata in which they bury themselves from where they attack small bottom-dwelling fish (Tahil, 1983; Kennelly, 1992) . The species may grow up to 150 millimeters (5.9 in) long and weigh up to 900 grams (2.0 lb) . Ranina is mainly nocturnal and remains buried in the sand during the day. They are easily distinguished from other crab species in their habitat due to their red carapace and long midsection.  \nThis red crab is the most prominent representative species of the family Raninidae. Low, rounded, scale-like spines wholly cover the carapace in large or small numbers, which are broader anteriorly. Eye stalks are set vertically and are longer than the others. Strong cheliped bears seven or eight teeth. Paddleshaped walking legs, with anterior and posterior borders that are hairy. Body reddish-brown in color with some ten white spots on the anterior part of the carapace (Kasinathan et al., 2007) . Red frogs, also known as spanner crabs, are opportunistic feeders with a diet consisting of urchins, bivalves, mollusks, crustaceans, polychaete worms, and fish. The largest commercial fishery of this crab is on the eastern coast of Australia (Queensland ","cbCaiggosQE5eGbX","https://ap.wps.com/l/cbCaiggosQE5eGbX","pdf",719087,16,"English","# Abstract\n# Introduction\n# Materials and Methods\n## Site Description\n## Sample Collection","[{\"question\":\"What is the main objective of the study on Ranina ranina from Balut Island?\",\"answer\":\"To investigate and establish correlations among morphometric characteristics between female and male Ranina ranina, including body size traits and body weight relationships.\"},{\"question\":\"Which morphometric variables were measured for the crabs?\",\"answer\":\"Carapace width and length, abdomen width and length, propodus length, dactylus length, and body weight were assessed from 60 sexed samples.\"},{\"question\":\"How do female and male crabs differ in body size and weight in this study?\",\"answer\":\"Females generally have larger body size, whereas males can attain higher total body weight, consistent with differences in growth patterns and maturity.\"}]","MORPHOMETRIC ANALYSIS OF THE RED FROG CRAB CURACHA Ranina ranina FROM BALUT ISLAND - A STUDY OF SEX-RELATED MORPHOMETRIC CHARACTERISTICS | PDF"]