X‐ray measurements of gill‐arch movements in filter‐feeding bream, Abramis brama (Cyprinidae)

Abstract

The technique of X-ray cinematography was used to study pharyngeal movements in Abramis brama (L.). The theoretical and practical problems in X-ray cinematography of feeding fish are discussed, as well as criteria for the selection of images suited for detailed measurements.Respiration and filter-feeding on Daphnia pulex (length c. 1 mm) show different gill arch movement patterns in bream. Slits between gill-arches are kept smaller during filter-feeding. In addition, during filter-feeding, this inter-arch distance decreases considerably in a posterior direction. The hypothesis that particle retention occurs on the slits formed between adjacent gillarches and their gill-rakers is not supported by the present results.

Consumption and prey size selection of the nematode Caenorhabditis elegans by different juvenile stages of freshwater fish

“…This low percentage is achieved by the intra-oral sorting of food and non-food in a repetitive mechanical process by which food is gradually cleaned (Sibbing, 1988;Sibbing & Nagelkerke, 2001). Mucus secretion to fix fine particles and organisms is also important in this process (Hoogenboezem et al, 1991;Hoogenboezem & Van den Boogart, 1993;Sanderson et al, 1996). Together with specialised morphological structures and the unique configurations of the oral cavity and gill arches, it is important in prey size selection and, thus, at least for the fish examined in this study, in their ability to feed effectively on specific sizes of their nematode prey.…”

“…The branchial apparatus determines the mesh size of the gill filters and hence the minimum size of the retained particles (Hoogenboezem etal., 1991). For bottom-feeding fishes, the branchial apparatus is uniquely adapted with regard to several crucial morphological characteristics (Hoogenboezem et al, 1991). Thus, the mean inter-raker distance on the first and second gill arch of C. carpio (3-12 cm L j) is 83-164 pm compared with 129-537 p m in G. gobio (2.5-12 cm LT).…”

“…The branchial apparatus of the fish determines the mesh size of the gill filters and plays an important role in prey size selection (Hoogenboezem et al, 1991). In aquaculture, the larvae of some fish species are fed routinely with meiobenthic organisms (rotifers or Artemia eggs) until they are able to accept fish pellets.…”

Structure, development and function of the branchial sieve of the common bream, Abramis brama, white bream, Blicca bjoerkna and roach, Rutilus rutilus

“…A second hypothesis is whether the functioning of the filter is related to success in zooplankton-rich environments. These relations have been investigated for bream by Hoogenboezem et al (1990Hoogenboezem et al ( , 1991.…”

Tradeoffs between respiration and feeding in Sacramento blackfish, Orthodon microlepidotus

“…Blackfish, therefore, should be able to feed efficiently on planktonic patches in either normoxic or hypoxic areas of Clear Lake . In contrast, a European cyprinid, the common bream, apparently filters particles directly with movable rakers between adjacent gill arches, yet also inhabits eutrophic lakes (Hoogenboezem et al 1990(Hoogenboezem et al ,1991 . Is filtering efficiency compromised during hypoxic exposure in species such as common bream?…”