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<br /> <br />FIgure 72. Striped mullet/lisa, 38 cm in total length, lrom Estuarlo de Sanla Clara, <br />Sonora, This predominalely marine species enters the lower pans of major rivers <br />throughout most of the tropics worldwide: It was not considered by Ihe American Fish" <br />erles Society. <br /> <br />their young move InW l.~tuarles to feed Jnd grow. <br />Young individuals (to IS cm total length) swarm In <br />the Color>ido RJ\'er esruuy: lart:er (presumably older) <br />fish tend to move farther upstreJm when W;\[(:'f IS <br />Available. \'\Then adulr (innt:t:r than n cm) they <br />dIsappear frtlm trt~ow.lter, monn8 hack w the sea <br />to reproduce. <br /> <br />Fishes of Desert Oases <br /> <br />Sprin~s rising trom subsurface sourCt:S sometImes <br />form special aquatic habitats 10 deserts. which may <br />be inhAbited by equally speCIal tishes, Sprmgs occur <br />where fractures In the earth allow dt:ep .....att:rs to rise <br /> <br />to the surface, or as pOints where water accumulating <br />,it higher altitude .lnd percol.!tJng through pomus <br />str.lta t:mert:es. \'\'att:r from Jet:p sources ofren is htlt <br />and (hart:eJ with />,;l.SSt:S and salts otherwise <br />uncommon 10 ,1 regIOn. Ochers represent .1 simple <br />Intr-rs('critln of .\ local watt~r table with the land <br />surface. Spring water is typically clear and constant <br />10 volume. Fishes hnng in such places have few <br />{'nnmnmr'ntal cues orher than daylenf.'th-there are <br />nu spring lloods or summer droughts. se.lsonal <br />temperature (hangr's, or changes in substrate or <br />turbidity with .....hich to deal. They mar thus <br />reproduce rhroughout rhe Yt:;I( and grow .It a <br />cunstant rate dependent on population size rather <br />than physical faCtors. <br /> <br /> <br />Figure 73. Paclllc tenpounderl <br />machete. 15.0 cm in tOlallength. <br />lrarn Estuano de Santa Clara, <br />Sonora. This relatIVe of the tarpon <br />was not considered by the <br />Ameflcan Fisheries Society. <br /> <br />37 <br /> <br />01111 <br />