Prey-specific gastric evacuation of Norwegian spring spawning herring (Clupea harengus) ...

• Main Authors: Årnes, Cecilie Broms T., Melle, Webjørn, Thorsen., Anders
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2004 - P - Theme session 2024
• Subjects: Technologies and data; Ecosystem observation, processes and dynamics; Norwegian Sea
• Online Access: https://dx.doi.org/10.17895/ices.pub.25350013.v1; https://ices-library.figshare.com/articles/conference_contribution/Prey-specific_gastric_evacuation_of_Norwegian_spring_spawning_herring_Clupea_harengus_/25350013/1

No abstracts are to be cited without prior reference to the author.Gastric evacuation rates have earlier mainly been measured based on laboratory experiments. The aim of this study is to obtain information of gastric evacuation rates when the herring are feeding in their natural environment. Gastric evacuation field study was performed on Norwegian spring spawning herring (Clupea harengus) based on two catches obtained by purs-seining in the Norwegian Sea between 1 and 4 June 2002. After capture the herring were kept in the seine for about 24 hours, and during that time usually more than 20 individuals were sampled from the catch at time intervals of approximately three hours and frozen. The herring sub-samples were taken with gillnet stretched out in the seine. Sea surface temperature was noted at the ships sensors at the time of sampling. In the laboratory the stomach contents were identified to the lowest taxonomic group, dried and weighed, and used to calculate the prey-specific evacuation rates. In ...