Digestive and feeding characteristics of the chondrosteans

Randal Buddington, Jay P. Christofferson

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

Structure and function of the digestive system and feeding characteristics of the chondrosteans are reviewed. Although the group exhibits a wide diversity of feeding habits including piscivory, benthophagy, and planktivory, they are principally carnivores throughout their life history. Examination of digestive system structure reveals the basic structure to be similar among the species with some modification to accomodate the different food types. For the species studied, composition of the adult digestive enzyme complement is consistent with the carnivorous habits with proteases dominating and only low levels of carbohydrase activity. There are three secretory phases during development of the digestive system. Each corresponds with different food habits of the different life-history intervals. Vision is apparently not utilized for feeding in any interval. Instead food is recognized and located primarily by gustation, olfaction, textural qualities, and, possibly, electroreception.

Original languageEnglish (US)
Pages (from-to)31-41
Number of pages11
JournalEnvironmental Biology of Fishes
Volume14
Issue number1
DOIs
StatePublished - Oct 1 1985

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digestive system
food
life history
planktivory
piscivory
olfaction
digestive enzymes
smell
carnivore
carnivores
complement
proteinases
enzyme
species diversity

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

Digestive and feeding characteristics of the chondrosteans. / Buddington, Randal; Christofferson, Jay P.

In: Environmental Biology of Fishes, Vol. 14, No. 1, 01.10.1985, p. 31-41.

Research output: Contribution to journalArticle

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