Laserfiche WebLink
<br />~ <br />--g---- <br />~ <br /> <br />"1> <br /> <br />PHASE 1 <br /> <br />~ <br /> <br />PHASE 2 <br /> <br /> <br />-9 <br /> <br />PHASE 3 <br /> <br />-3 <br /> <br />PHASE 4 <br /> <br />Sl <br /> <br />PHASE 5 <br /> <br /> <br />]> <br /> <br />ADULT FORM <br /> <br />Fig. 5. Phases of gut coil development in catostomid fish larvae and early juveniles with comparison to adult <br />form in Catostomus commerson; (latter modified from Stewart 1926). Phase 1 -- essentially straight gut. Phase <br />2 -- initial loop formation (usually on left side), begins with 900 bend. Phase 3 -- full loop, begins with straight <br />loop extending to near anterior end of visceral cavity. Phase 4 -- partial fold and crossover, begins with crossing <br />of first limb over ventral midline. Phase 5 -- full fold and crossover, begins with both limbs of loop extending <br />fully to opposite (usually right) side, four segments of gut cross nearly perpendicular to the body axis. Later in <br />Phase 5 and in adult form, outer portions of gut folds or coils extend well up both sides of visceral cavity. <br /> <br />18 <br />