caa a22 4500 477116779 CHVBK 20180405111624.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF00005038 doi (NATIONALLICENCE)springer-10.1007/BF00005038 Blanchard Tom Department of Biological Sciences, Southeastern Louisiana University, 70402, LA, U.S.A. aut Ovarian cycles and microhabitat use in two species of topminnow, Fundulus olivaceus and F. euryzonus , from the southeastern United States [Elektronische Daten] [Tom Blanchard] Synopsis: Differences in spawning seasonality, inferred from ovarian cycles, and microhabitat use for two closely related Fundulus species were not effective as potential reproductive isolating mechanisms. Seasonal spawning periodicity of F. olivaceus and F. euryzonus as shown by changes in mean egg diameter and mean number of mature eggs recovered from ovaries showed nearly identical temporal patterns in reproductive activity. Peak egg development was between April and May and was lowest by the end of August. Univariate comparisons of 11 environmental variables associated with aggregations of Fundulus spp. revealed highly significant differences in several of these variables. However, individuals of both species were frequently collected together, and microhabitat differences did not remove the potential for mismating. Kluwer Academic Publishers, 1996 Fundulidae nationallicence Reproduction nationallicence Isolating mechanisms nationallicence Fecundity nationallicence Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl 47/2(1996-10-01), 155-163 0378-1909 47:2<155 1996 47 10641 https://doi.org/10.1007/BF00005038 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005038 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Blanchard Tom Department of Biological Sciences, Southeastern Louisiana University, 70402, LA, U.S.A aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl/ 47/2(1996-10-01), 155-163 0378-1909 47:2<155 1996 47 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer