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By D.W. Sims

Advances in Marine Biology used to be first released in 1963. Now edited through David W. Sims (Marine organic organization, UK), the serial publishes in-depth and up to date experiences on a variety of subject matters so as to attract postgraduates and researchers in marine biology, fisheries technological know-how, ecology, zoology, oceanography. Eclectic volumes within the sequence are supplemented by way of 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 dimension in marine invertebrates * Discusses vital info at the social constitution and methods of delphinids * greater than 250 pages of the most recent discoveries in marine technological know-how

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178). The effect of egg size on the pre-feeding period should not be assumed to be substantially less than its effect on the feeding period. Given the lack of an effect of egg size on total developmental time discussed above, we suggest that the effects of egg size on the pre-feeding period may partially balance the effects of egg size on the feeding period, thereby obscuring any relationship between egg size and time to metamorphic competence. Alternatively, differences in the size at metamorphosis among species may also be obscuring any egg size–feeding period relationship in planktotrophs (Strathmann, 1977).

Second, the lack of a significant relationship within some species is almost certainly due to a Type II error as a result of a lack of statistical power. , McEdward and Chia (1991) used three values for two of the species in their study]. 4 Summary of studies examining the relationship between offspring size and energetic content Study Species Method Correlation n of eggs/ female McEdward and Chia, 1991 McEdward and Chia, 1991 McEdward and Chia, 1991 McEdward and Chia, 1991 McEdward and Chia, 1991 McEdward and Coulter, 1987 Clarke, 1992 Henricia sp.

To direct developers, but competition among sibling larvae in planktotrophic species seems unlikely. Hendry et al. , larger mothers having access to the best spawning sites), then a correlation between offspring size and maternal size should be expected. These are all intriguing possibilities, but we currently have insufficient data to determine if any of these models apply to marine invertebrates. Alternatively, the maternal size–offspring size relationship may be non-adaptive and simply be a product of anatomical scaling constraints (Fox and Czesak, 2000).

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