Download Advances in Marine Biology, Vol. 25 by J.H.S. Blaxter (ed.), A.J. Southward (ed.) PDF

By J.H.S. Blaxter (ed.), A.J. Southward (ed.)

Quantity 25 of this authoritative evaluation sequence maintains the excessive usual set by means of the editors some time past. Marine biologists far and wide have come to worth and revel in the wide range of thought-provoking papers written through invited experts.In this quantity are experiences of 4 animal teams which span the complete variety of the marine nutrition chain. The position of parasites in ecology is a starting to be curiosity and the parasites of zooplankton are defined intimately for the 1st time. elements of thegastropods, cephalopods and fish lifestyles also are tested intimately.

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Extra info for Advances in Marine Biology, Vol. 25

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9(d)). Trends of increasing vulnerability as prey size increases have been shown by many investigators (see Zaret, 1980), and most recently by Pepin et al. (1987) for Atlantic mackerel feeding on various larvae. Brownell (1985) reported that juvenile cape anchovy will cannibalize the largest anchovy larvae possible. Folkvord and Hunter (1986) presented prey vulnerability curves for northern anchovy cannibalizing larval anchovy similar to that in Fig. 9(d). Yolk-sac anchovy larvae were less vulnerable because of low visibility; maximum predation rate was attained on first-feeding larvae before improved escape abilities or predator gape limitation caused a decrease in vulnerability .

81day Fishes Engraulis ringens E. , 1981 Christensen, 1983 Christensen, 1983 Fuiman and Gamble, 1988 Nair, 1954 Purcell, 1984 Purcell, 1981 Alheit, 1987 Hunter and Kimbrell, 1980 Fuiman and Gamble, 1988 Fuiman and Gamble, 1988 36 K. M. BAILEY AND E. D . HOUDE prey densities usually are higher than those in the sea, experiments are usually of short duration (whereas field observations integrate feeding over many hours), and the walls of containers may facilitate trapping of prey. Laboratory predation rates cited in Table 3 should be considered near maximum potential ingestion rates.

D . HOUDE contents; a= rate (/h) of gastric evacuation; t= h/d that a fish feeds. Elliott and Persson’s equation has not been applied to predation upon fish eggs and larvae, but Dwyer et al. (1987) have used this model to calculate consumption of 0-group juvenile walleye pollock (Theragra chalcogramma) by adult pollock. The Elliott and Persson’s model generally requires rigorous sampling intervals of 1-3 h. Boisclair and Leggett (1988) compared the Elliott and Persson and the relatively simpler Eggers’ model in an in situ experiment and found that the two models were comparable in magnitude and accuracy of daily ration estimates for adult yellow perch (Perca Javescens).

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