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Peter Funch

Food habit of horseshoe crabs, Tachypleus gigas (Müller 1785) and Carcinoscorpius rotundicauda (Latreille 1802) in Balikpapan coastal waters, East Kalimantan

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  • Rani Nuraisah , Institut Pertanian Bogor
  • ,
  • Naila Khuril Aini, Institut Pertanian Bogor, Indonesia
  • Ali Mashar, Institut Pertanian Bogor, Indonesia
  • Zairion Zairion , Institut Pertanian Bogor, Indonesia
  • Yuni P. Hastuti , Institut Pertanian Bogor
  • ,
  • Peter Funch
  • Yusli Wardiatno, Institut Pertanian Bogor, Indonesia
Horseshoe crabs are living fossils found in Indonesia. This study examined the food habit of horseshoe crabs (Carcinoscorpius rotundicauda and Tachypleus gigas) collected from Balikpapan coastal waters, East Kalimantan. Horseshoe crabs were captured using gill nets and picked by hand along the Balikpapan coast. The width of the prosoma and the body weight of each individual were measured, and the gut contents were analysed to determine the preponderance index, food niche breadth, and niche overlap. Carcinoscorpius rotundicauda prosoma widths ranged from 4.1 to 15.4 cm and those of Tachypleus gigas ranged from 2.8 to 24 cm. Eight food items were found in the gut of the horseshoe crabs, namely: bivalves, gastropods, scaphopoda, polychaetes, echinoderms, crustaceans, leaf litter and others. Based on the preponderance index, gastropods were the main food item of the two horseshoe crab species. In accordance to the food composition the horseshoe crabs inhabiting Balikpapan coastal waters are categorized as benthivores.
Original languageEnglish
JournalJournal of Natural Resources and Environmental Management
Pages (from-to)153-162
Number of pages10
Publication statusPublished - 2020

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ID: 201930840