Environmental water flow can boost foraging success of the juvenile rapa whelk Rapana venosa (Muricidae) in aquaculture tanks with still or flowing water: Indication of chemosensory foraging

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Abstract

Artificial breeding of Rapana venosa has been attempted in China, but the high mortality rate of rapa whelk juveniles (10–40 mm) seriously restricts the breeding success of this species in artificial cultivation and the overall aquaculture industry, and thus the scale of industrialization is far from being realized. One main factor was found to contribute to this high mortality rate: the low predation efficiency of juveniles. We studied the foraging behavior of various sized R. venosa juveniles in still, flowing, and circulating water, with the juveniles being positioned either upstream or downstream from the prey in the flowing water experiments. Our findings demonstrated that the distance between juveniles and prey in still water significantly restricted the ability of juveniles to locate food, but water flow significantly enhanced this ability. In addition, the small-sized juveniles were found to be more active predators than the larger sized juveniles. Our findings demonstrated that circulating water flow is important to improve the survival and growth rate of juveniles in R. venosa cultures. Our results broaden the understanding of chemical orientation in gastropods and can be used to develop or improve commercial breeding strategies for R. venosa.

Detaljer

Författare
  • Zheng Lin Yu
  • Nan Hu
  • Mei Jie Yang
  • Hao Song
  • Zhi Hu
  • Xiao Long Wang
  • Cong Zhou
  • Zhi Xin Zhang
  • Tao Zhang
Enheter & grupper
Externa organisationer
  • Institute of Oceanology, Chinese Academy of Sciences
  • Qingdao National Laboratory for Marine Science and Technology
  • Center for Ocean Mega-Science, Chinese Academy of Sciences
  • Marine Biology Institute of Shandong Province
  • Bureau of Ocean and Fisheries of Rongcheng
  • University of the Chinese Academy of Sciences
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Vilt- och fiskeförvaltning

Nyckelord

Originalspråkengelska
Artikelnummer734392
TidskriftAquaculture
Volym513
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa