Marco Boschiero, Chiara Facca, Francesco Cavraro, Matilde Tonolli, Stefano Malavasi, Piero Franzoi
{"title":"入侵蓝蟹(Callinectes sapidus)对马尼拉蛤(Ruditapes philippinarum)的摄食策略:对水产养殖的启示","authors":"Marco Boschiero, Chiara Facca, Francesco Cavraro, Matilde Tonolli, Stefano Malavasi, Piero Franzoi","doi":"10.1016/j.ecss.2025.109486","DOIUrl":null,"url":null,"abstract":"<div><div>The Manila clam (<em>Ruditapes philippinarum</em>) has become a key aquaculture resource in the Northern Adriatic lagoons. In recent years, the rapid spread of the invasive blue crab (<em>Callinectes sapidus</em>) has emerged as a major threat to clam farming. This study investigated blue crab feeding strategies on clam seed (15–30 mm), marketable clams (30–40 mm), and larger individuals (>40 mm) through two controlled laboratory experiments. The first experiment assessed feeding rates over a 24-h period, while the second analyzed handling behaviour using focal sampling and video recording. Results show that small clams were more frequently consumed, with males preying more actively than females. The 'Crushing' opening technique was predominantly used on smaller clams, while the more time-consuming 'Dactyl' opening technique was used for larger prey. These findings highlight the vulnerability of seed clams and underline the urgent need for management measures to mitigate predation by blue crabs in aquaculture settings.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"325 ","pages":"Article 109486"},"PeriodicalIF":2.6000,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Feeding strategies of the invasive blue crab (Callinectes sapidus) on manila clam (Ruditapes philippinarum): Implications for aquaculture\",\"authors\":\"Marco Boschiero, Chiara Facca, Francesco Cavraro, Matilde Tonolli, Stefano Malavasi, Piero Franzoi\",\"doi\":\"10.1016/j.ecss.2025.109486\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The Manila clam (<em>Ruditapes philippinarum</em>) has become a key aquaculture resource in the Northern Adriatic lagoons. In recent years, the rapid spread of the invasive blue crab (<em>Callinectes sapidus</em>) has emerged as a major threat to clam farming. This study investigated blue crab feeding strategies on clam seed (15–30 mm), marketable clams (30–40 mm), and larger individuals (>40 mm) through two controlled laboratory experiments. The first experiment assessed feeding rates over a 24-h period, while the second analyzed handling behaviour using focal sampling and video recording. Results show that small clams were more frequently consumed, with males preying more actively than females. The 'Crushing' opening technique was predominantly used on smaller clams, while the more time-consuming 'Dactyl' opening technique was used for larger prey. These findings highlight the vulnerability of seed clams and underline the urgent need for management measures to mitigate predation by blue crabs in aquaculture settings.</div></div>\",\"PeriodicalId\":50497,\"journal\":{\"name\":\"Estuarine Coastal and Shelf Science\",\"volume\":\"325 \",\"pages\":\"Article 109486\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-08-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Estuarine Coastal and Shelf Science\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0272771425003646\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MARINE & FRESHWATER BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Estuarine Coastal and Shelf Science","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272771425003646","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
Feeding strategies of the invasive blue crab (Callinectes sapidus) on manila clam (Ruditapes philippinarum): Implications for aquaculture
The Manila clam (Ruditapes philippinarum) has become a key aquaculture resource in the Northern Adriatic lagoons. In recent years, the rapid spread of the invasive blue crab (Callinectes sapidus) has emerged as a major threat to clam farming. This study investigated blue crab feeding strategies on clam seed (15–30 mm), marketable clams (30–40 mm), and larger individuals (>40 mm) through two controlled laboratory experiments. The first experiment assessed feeding rates over a 24-h period, while the second analyzed handling behaviour using focal sampling and video recording. Results show that small clams were more frequently consumed, with males preying more actively than females. The 'Crushing' opening technique was predominantly used on smaller clams, while the more time-consuming 'Dactyl' opening technique was used for larger prey. These findings highlight the vulnerability of seed clams and underline the urgent need for management measures to mitigate predation by blue crabs in aquaculture settings.
期刊介绍:
Estuarine, Coastal and Shelf Science is an international multidisciplinary journal devoted to the analysis of saline water phenomena ranging from the outer edge of the continental shelf to the upper limits of the tidal zone. The journal provides a unique forum, unifying the multidisciplinary approaches to the study of the oceanography of estuaries, coastal zones, and continental shelf seas. It features original research papers, review papers and short communications treating such disciplines as zoology, botany, geology, sedimentology, physical oceanography.