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The Biology of Sharks and Rays$
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Peter A. Klimley and Steven Oerding

Print publication date: 2013

Print ISBN-13: 9780226442495

Published to Chicago Scholarship Online: January 2014

DOI: 10.7208/chicago/9780226923086.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 22 October 2021

Diet and Growth

Diet and Growth

(p.339) Chapter 13 Diet and Growth
The Biology of Sharks and Rays

A. Peter Klimley

University of Chicago Press

This chapter discusses what cartilaginous fishes eat, their frequency of feeding, their rates of digestion and growth, and to what age they live. The composition of the diet of the cartilaginous fishes often changes as they grow larger and migrate from one geographical region to another. The diet can also differ among males and females because in many cartilaginous fishes, the sexes segregate from each other and occupy separate feeding grounds. The cartilaginous fishes are unique in their possession of spiral and scrolled intestines, which confers both advantages and disadvantages. Their compactness affords more space in the peritoneum to accommodate a larger liver and uterus. Yet the economy in mucosal surface results in a slower digestion rate and prolongs the interval between foraging bouts.

Keywords:   cartilaginous fishes, feeding, digestion, intestines

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