Advances in Marine Biology, Vol. 25 - download pdf or read online

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

ISBN-10: 0120261251

ISBN-13: 9780120261253

Quantity 25 of this authoritative overview sequence maintains the excessive general set by way of the editors long ago. Marine biologists in every single place have come to worth and revel in the big variety of thought-provoking papers written via invited experts.In this quantity are stories of 4 animal teams which span the full variety of the marine meals chain. The function of parasites in ecology is a turning out to be curiosity and the parasites of zooplankton are defined intimately for the 1st time. facets 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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Margulies (1986) found five to tenfold reductions in predation rate by juvenile bluegills on white perch larvae when Duphnia mugnu was added to experiments. But, there was no selection by bluegill for either white perch larvae or Duphniu. Both prey were of approximately equal size and were consumed in proportion to their abundances. Experiments testing effects of alternative prey clearly demonstrate its importance in moderating the potential impact of many predators on early life stages of fishes.

Thus, temporal overlap is critical. Spawning of Pacific hake Merluccius productus in Puget Sound commences prior to the spring phytoplankton bloom (Fig. lo), but ends before peak abundances of most predator populations (the predators shown may not necessarily be predators on hake eggs and larvae). Hake eggs are spawned at 100-150 m and remain near the seabed through egg and yolk-sac 28 K. M. BAILEY AND E. D. HOUDE / T Chlorophyll I Larval food Pseudocalanus spp. eggs - . I Hake eggs 1 ,a Hake yolk-sac larvae Eggs ai Hake feeding larvae , , , , , , -1 I 1 Euchaeta elongata Sagitta elegans i Pleurobrachia bacheii Prei ators Aequorea victoria iA____ L Month PREDATION AND THE RECRUITMENT PROBLEM 29 stages until larvae begin to feed (Bailey, 1982).

D. , 1985). japonica diet. 2% in April. japonica and degree of overlap of the two organisms. The high predation estimate in April may be exaggerated because the abundance of sand eel larvae was underestimated. In April many larvae were large enough to avoid the 1 m ring-net samplers but apparently were still vulnerable to amphipod predation. Brewer et al. (1984) reported incidences of predation upon eggs and larvae by zooplankton.

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

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