Abstract
Turbulence, unless reaching a threshold level, is generally assumed to enhance ingestion rates in larval fish by increasing encounters with prey. This hypothesis is mainly based on the assumption of a prey-limited environment. In some estuarine areas characterized by high turbulence levels, this hypothesis is rarely met. This study experimentally investigated the effects of flow turbulence (flow Reynolds number Re, ranging from 0 to 55×103) on prey ingestion in European sea bass (Dicentrarchus labrax) larvae exposed to prey densities comparable to what is found in a nursery area (i.e., Seine estuary, English Channel). This paper also estimated the prey ingestion rates in sea bass larvae exposed to three different flow conditions (Re=0, 21.6×103, and 43.9×103) during various time periods. Contrary to predictions regarding limiting prey densities, the analysis of individual gut contents under different levels of turbulence revealed that increasing Reynolds number (Re) decreased prey ingestion. In addition, increased turbulence affected the feeding to satiation levels in sea bass larvae.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Experimental Marine Biology and Ecology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
