By D.W. Sims
Advances in Marine Biology used to be first released in 1963. Now edited by means of David W. Sims (Marine organic organization, UK), the serial publishes in-depth and updated studies on quite a lot of themes so one can entice postgraduates and researchers in marine biology, fisheries technology, ecology, zoology, oceanography. Eclectic volumes within the sequence are supplemented via thematic volumes on such issues as The Biology of Calanoid Copepods and Restocking and inventory Enhancement of Marine Invertebrate Fisheries . * New info at the offspring measurement in marine invertebrates * Discusses very important info at the social constitution and techniques of delphinids * greater than 250 pages of the most recent discoveries in marine technology
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Additional resources for Advances in Marine Biology, Vol. 53
4 summarizes those studies that have examined the relationship between egg size and energetic content within marine invertebrate species. McEdward and colleagues have repeatedly suggested that egg size is not a reliable indicator of maternal investment because some regression equations required large differences in egg size to predict a difference in energetic content (McEdward and Carson, 1987; McEdward and Chia, 1991; McEdward and Coulter, 1987; McEdward and Miner, 2001). We would argue that offspring size is probably a reasonable reflection of offspring energetic content for a number of reasons.
It may be that initial egg size can affect either length of planktonic period or juvenile size even in the same species. Allen et al. (2006) demonstrated that manipulating egg size had strong effects on post-settlement size in Clypeaster rosaceus and generally, halving egg size had a larger effect than manipulating larval food. It is possible that egg size has more of an effect in planktotrophs with large eggs (C. rosaceus is facultatively planktotrophic) than species with small eggs. Alternatively, the different larval food levels could also explain variation in the results of different studies.
For example, McGinley et al. (1987) found that producing offspring of variable size was advantageous only when mothers could strictly control the dispersal of their offspring into the appropriate habitat. Rather than having an adaptive basis, intra-brood variation is increasingly viewed as a product of physiological or genetic constraints that prevent mothers from producing offspring of identical size (Einum and Fleming, 2004b; Fox and Czesak, 2000). In their review of offspring-size effects on insects, Fox and Czesak (2000; p.
Advances in Marine Biology, Vol. 53 by D.W. Sims