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SOME RELATIONSHIPS BETWEEN TEMPERATURE AND EGG SIZE, BODY SIZE, DEVELOPMENT RATE, AND FECUNDITY, OF THE COPEPOD PSEUDOCALANUS 1
Author(s) -
McLaren Ian A.
Publication year - 1965
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1965.10.4.0528
Subject(s) - fecundity , copepod , biology , population , avian clutch size , population size , zoology , ecology , reproduction , crustacean , demography , sociology
Size, development rate, and fecundity of Pseudocalanus are functions of temperature. These functions may be difficult to determine and are not general but vary geographically. Egg size is less variable, but a local variant of Pseudocalanus with much larger eggs gives useful clues to the control of size and development rates. The constants of proportionality of size and development rate as functions of temperature appear to be themselves proportional to egg (and nucleus) diameter. The degree of curvilincarity of the response of development rate to temperature may be the same in different populations. Fecundity differs geographically, but total clutch volume, determined from egg diameter, is the same function of female length wherever Pseudocalanus occurs. Thus, if temperature characteristics of size, development rate, and fecundity can be obtained in detail from one population, they can be transferred to other populations.