Cellulase activity and niche separation in freshwater gastropods

Peter Calow, Lesley J. Calow

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

ALTHOUGH there is considerable morphological similarity between different species of freshwater snail in terms of general body form and radular construction1, differences in diet occur2,3. Furthermore, preferred food materials are invariably digested more efficiently than less preferred materials4 (Fig. 1). The implications are that differences in diet and resultant niche separations are dependent on physiological, rather than morphological, divergence and that the former is probably related to the quality and quantity of enzyme secretion. Thus it may be possible to reconcile the conflict first noted by Boycott5 between the general observation that most species of freshwater gastropod can and do coexist5,6 and the so-called "competitive exclusion principle". To test this hypothesis we have examined cellulase activity in 14 species of snail and have linked our results to known dietary differences and to direct observations on assimilation efficiencies. We have found a strong correlation between enzyme activity and assimilation efficiency, and that dietary preferences can be ascribed to physiological differences of this kind.

Original languageEnglish (US)
Pages (from-to)478-480
Number of pages3
JournalNature
Volume255
Issue number5508
DOIs
StatePublished - Dec 1 1975
Externally publishedYes

Fingerprint

Gastropoda
Cellulase
Snails
Fresh Water
Diet
Enzymes
Food

Cite this

Cellulase activity and niche separation in freshwater gastropods. / Calow, Peter; Calow, Lesley J.

In: Nature, Vol. 255, No. 5508, 01.12.1975, p. 478-480.

Research output: Contribution to journalArticle

Calow, Peter ; Calow, Lesley J. / Cellulase activity and niche separation in freshwater gastropods. In: Nature. 1975 ; Vol. 255, No. 5508. pp. 478-480.
@article{f227059192634ab2ba31fee37adbcd22,
title = "Cellulase activity and niche separation in freshwater gastropods",
abstract = "ALTHOUGH there is considerable morphological similarity between different species of freshwater snail in terms of general body form and radular construction1, differences in diet occur2,3. Furthermore, preferred food materials are invariably digested more efficiently than less preferred materials4 (Fig. 1). The implications are that differences in diet and resultant niche separations are dependent on physiological, rather than morphological, divergence and that the former is probably related to the quality and quantity of enzyme secretion. Thus it may be possible to reconcile the conflict first noted by Boycott5 between the general observation that most species of freshwater gastropod can and do coexist5,6 and the so-called {"}competitive exclusion principle{"}. To test this hypothesis we have examined cellulase activity in 14 species of snail and have linked our results to known dietary differences and to direct observations on assimilation efficiencies. We have found a strong correlation between enzyme activity and assimilation efficiency, and that dietary preferences can be ascribed to physiological differences of this kind.",
author = "Peter Calow and Calow, {Lesley J.}",
year = "1975",
month = "12",
day = "1",
doi = "10.1038/255478a0",
language = "English (US)",
volume = "255",
pages = "478--480",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "5508",

}

TY - JOUR

T1 - Cellulase activity and niche separation in freshwater gastropods

AU - Calow, Peter

AU - Calow, Lesley J.

PY - 1975/12/1

Y1 - 1975/12/1

N2 - ALTHOUGH there is considerable morphological similarity between different species of freshwater snail in terms of general body form and radular construction1, differences in diet occur2,3. Furthermore, preferred food materials are invariably digested more efficiently than less preferred materials4 (Fig. 1). The implications are that differences in diet and resultant niche separations are dependent on physiological, rather than morphological, divergence and that the former is probably related to the quality and quantity of enzyme secretion. Thus it may be possible to reconcile the conflict first noted by Boycott5 between the general observation that most species of freshwater gastropod can and do coexist5,6 and the so-called "competitive exclusion principle". To test this hypothesis we have examined cellulase activity in 14 species of snail and have linked our results to known dietary differences and to direct observations on assimilation efficiencies. We have found a strong correlation between enzyme activity and assimilation efficiency, and that dietary preferences can be ascribed to physiological differences of this kind.

AB - ALTHOUGH there is considerable morphological similarity between different species of freshwater snail in terms of general body form and radular construction1, differences in diet occur2,3. Furthermore, preferred food materials are invariably digested more efficiently than less preferred materials4 (Fig. 1). The implications are that differences in diet and resultant niche separations are dependent on physiological, rather than morphological, divergence and that the former is probably related to the quality and quantity of enzyme secretion. Thus it may be possible to reconcile the conflict first noted by Boycott5 between the general observation that most species of freshwater gastropod can and do coexist5,6 and the so-called "competitive exclusion principle". To test this hypothesis we have examined cellulase activity in 14 species of snail and have linked our results to known dietary differences and to direct observations on assimilation efficiencies. We have found a strong correlation between enzyme activity and assimilation efficiency, and that dietary preferences can be ascribed to physiological differences of this kind.

UR - http://www.scopus.com/inward/record.url?scp=0016740408&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0016740408&partnerID=8YFLogxK

U2 - 10.1038/255478a0

DO - 10.1038/255478a0

M3 - Article

C2 - 1138195

AN - SCOPUS:0016740408

VL - 255

SP - 478

EP - 480

JO - Nature

JF - Nature

SN - 0028-0836

IS - 5508

ER -