. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 162 D. A. ROMAN ET AL 2 200 240 280 WAVELENGTH IN Mill 320 36C Figure 6a. Ultraviolet spectra of fractions 5 (F - •-), 8 (G dash line). 17(H x x x), 21 (I OoO). 25 (J solid line), 29 (K dots), and 36 (L circles) from Sephadex LH-20 chromatography of blood plasma of Ascidia dispar. Discussion The analysis reported here should support the conclu- sion that P. chilensis is an iron and titanium accumula- tor, and that A. dispar is an iron, titanium, and vana- dium accumulator. In both species the predominant metal w
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 162 D. A. ROMAN ET AL 2 200 240 280 WAVELENGTH IN Mill 320 36C Figure 6a. Ultraviolet spectra of fractions 5 (F - •-), 8 (G dash line). 17(H x x x), 21 (I OoO). 25 (J solid line), 29 (K dots), and 36 (L circles) from Sephadex LH-20 chromatography of blood plasma of Ascidia dispar. Discussion The analysis reported here should support the conclu- sion that P. chilensis is an iron and titanium accumula- tor, and that A. dispar is an iron, titanium, and vana- dium accumulator. In both species the predominant metal was iron, which in the case of P. chilensis is consis- tent with ascidian phylogeny with respect to vanadium- and iron-containing species (Hawkins el ai, 1983c). In the order Pleurogona, all of its family species are iron accumulators (Swinehart el a/., 1974; Agudelo et al. 1982). However, A. dispar appears to he an iron-predom- inant species, although, it also accumulates titanium and vanadium at greater levels than considered non-biologi- cal (Saxby. 1969; Hawkins el ai. 1983c) with respect to metal contents in blood cells. Results from the whole body (specimens) are not reliable because when the ani- mal is removed it immediately begins to lose blood. In the sub-orders Aplousobranchia and Phlebobranchia. the majority contain vanadium in their blood (Hawkins el al., 1983c: Michibata et 1986). Titanium has been reported in ('tuna inteslinalis (Noddack and Noddack, 1939)and Eudt* nmaritleri(\jt\\nc. 1961. 1962a,b), but according to Goodbody (1974), there is no concrete evi- dence that titanium would be concentrated in blood cells. In the present work evidence is presented of this metal in the blood cells ol/' chilensis and . I dispar. However, some of these results could be only apparent from the biochemical point of view, because they may be influenced bv the ascidians immediate environment. Please note that these images are extracted from scanned page images that may ha
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