If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Structure of the gut of the racer goby Neogobius gymnotrachelus (Kessler, 1857)

$48.00 plus tax (Refund Policy)

Download / Buy Article:


The morphological and histological features of the gut of juvenile racer goby Neogobius gymnotrachelus [range of body mass 0·2–0·9 g and standard length (LS) 20·0–38·8 mm] were examined in fish collected from the Włocławek Reservoir on the Vistula River, Poland. Evidence is provided of the stomachless nature of the gut of the racer goby. The intestine of the juveniles lacks the intestinal bulb. A particular feature of the racer goby gut is the secretory oesogaster (the transitional region where the secretory oesophagus merges into the intestine) with multicellular alveolar glands that secrete via a common duct to the surface between the mucosal folds. The cells in the secretory oesogaster alveolar glands are periodic-acid-Schiff (PAS) positive indicating the presence of neutral mucopolysaccharides. It is hypothesized that the secretory oesogaster is evidence of the loss of the functional stomach in this species. There are two sphincters: the oesogaster–intestinal and the intestinal–rectal in the racer goby gut. It can be concluded that the oesogaster–intestinal sphincter is functionally related to the gastro-intestinal sphincter described in many fish species having a stomach. Enterocytes with a distinct brush border and only a few goblet cells are observed in the epithelium along the whole intestine. The existence of vacuoles in the supranuclear region of the rectal enterocytes is also confirmed.

Keywords: Neogobius gymnotrachelus; secretory oesogaster; stomachless fish

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1111/j.1095-8649.2008.01870.x

Affiliations: 1: Nicolaus Copernicus University, Laboratory of Histology and Embryology of Vertebrates, Gagarina 9, 87-100 Toruń, Poland 2: Nicolaus Copernicus University, Department of Hydrobiology, Gagarina 9, 87-100 Toruń, Poland

Publication date: May 1, 2008

Related content



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more