A North Carolina reef fish community was resurveyed with scuba gear to determine if changes occurred in community structure after 15 years of intense fishing. Generally, fishes important in the recreational and commercial fisheries were smaller, and large changes occurred in relative abundance and species composition. Indicative of a warming trend, total species composition of fishes had become more tropical, and a tropical sponge previously unrecorded at this latitude off the North Carolina coast became common. Two new (to the area) families and 29 new species of tropical fishes were recorded. Observations of 28 species of tropical reef fishes increased significantly. No new temperate species were observed, and the most abundant temperate species decreased by a factor of 22. Mean monthly bottom water temperatures in winter were 1–6°C warmer during the recent study. An increase in fish‐cleaning symbiosis was especially noticeable.
A. 1980. Serum concentration changes in protein, glucose, urea, thyroxine and triiodothyronine and thermostability of neonatal pigs farrowed at 25 and 10"C. Can. J. Anim. On day 108 of gestation, l6 sows were moved to farrowing crates in either a warm ( l 0 sows; 25.C) or cold (six sows; 10"c) room. Piglet blood samples were drawn by vena cava puncture at birth, 6, 12 and24hof age, and body weights, rectal temperatules and thermostability of piglets were recorded. Serum samples were analyzed for total protein, glucose, urea, thyroxine (Ta), triiodothyronine (T3), and cortisol (24 h only).Piglet mortality was 31 .3Vo and 6.4Vo for pigs farrowed in the cold oI waffn envrronments, respectively. Piglets that died weighed less (P < 0.05) than those that survived. Total serum protein increased (P < 0.05) after birth from 3 g/dl to more thanT gldL; however, thi. incr.a." occurred later in the pigs farrowed at l0'C. Serum glucosi of pigs farrowed in the cold was higher (P < 0.05) than that for pigs ar25"C.S.rum u.ea *as elevated (P < 0.01) by 6.2mgldLtn the cold-farrowed piglets. Serum Ta was lower (P < 0.05) at birth, 6 and 12 h for the 10"C pigs but was similar for both groups by 24 h. Serum T3 increased (P < 0.05) after birth and was sustained to l2 h in i|etb'cpigtetsbutnotinrheothers. At24h,serumcortisolwassimilar(P>0.05)in both groupi (10.3 +-1.02 p.eldL). Body temperatures were lower (P < 0.05) in cold-farrowed piglets, but both groups lost body heat at similar rates' Au 108" jour de leur gestation, l6 truies ont 6t6 mises en cases de maternit6 dans une pibce chaude, 25"C, 10 truies, ou froide, 10'C, 6 truies' Des prises de sang par ponction de
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