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A method for estimating larval life spans of aseasonal aquatic insects from streams on Bougainville Island, Papua New Guinea
Author(s) -
MARCHANT R.,
YULE C.M.
Publication year - 1996
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1046/j.1365-2427.1996.d01-449.x
Subject(s) - odonata , larva , streams , aquatic insect , new guinea , biology , ecology , life span , hydropsychidae , zoology , history , computer network , ethnology , evolutionary biology , computer science
1. The larval life spans of twelve species of aseasonal aquatic insects (eight Trichoptera, three Ephemeroptera, one Odonata) were investigated in two tropical streams with near constant water temperatures. 2. Life spans were estimated from equations relating larval life span to the ratio between cohort production (estimated from the size–frequency technique) and annual production (estimated from regressions in the literature). 3. Life spans varied from 40 to 250 days and were positively correlated with maximum larval dry weight ( r = 0.73, P < 0.001). Ephemeroptera had the shortest larval life spans (40–110 days), Trichoptera intermediate (95–185 days) and Odonata the longest (250 days).