Advances in Marine Biology, Vol. 53 by D.W. Sims PDF

By D.W. Sims

ISBN-10: 012374119X

ISBN-13: 9780123741196

Advances in Marine Biology was once first released in 1963. Now edited via David W. Sims (Marine organic organization, UK), the serial publishes in-depth and up to date experiences on a variety of subject matters that allows you to attract postgraduates and researchers in marine biology, fisheries technology, ecology, zoology, oceanography. Eclectic volumes within the sequence are supplemented by way of thematic volumes on such subject matters as The Biology of Calanoid Copepods and Restocking and inventory Enhancement of Marine Invertebrate Fisheries . * New details at the offspring dimension in marine invertebrates * Discusses very important info at the social constitution and methods of delphinids * greater than 250 pages of the newest discoveries in marine technological know-how

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Offspring size-number trade-off This is the simplest and most conserved feature of offspring-size optimality models, which typically assume that the number of offspring a mother can produce is inversely proportional to the size of their offspring: N¼ C s where N is the number of offspring produced, C is the total resources available for reproduction and s the size of offspring. Typically, this trade-off is presented as an energetic argument: mothers have a limited amount of energy available for reproduction, so any increase in offspring size will result in a concomitant decrease in fecundity.

Neritina, larval size can be positively or negatively correlated with colony size (Marshall, 2005). 3 is probably not an accurate representation of reality given that in many cases the absence of a relationship between maternal size and offspring size is unlikely to be reported. Therefore, the percentage of species where no relationship is present is probably dramatically underestimated. Nevertheless, it is clear that within a range of species, larger mothers produce larger offspring. , 1987). In non-marine species, maternal–offspring size relationships are common and a variety of adaptive explanations have been proposed for the observed correlations.

In contrast, the only mortality that Australian B. neritina experienced was early mortality after settlement, and thus overall mortality was strongly dependent on larval size. This early, sizedependent mortality of sessile invertebrates appears to be relatively common and one of the few generalizations that can be made about the postmetamorphic effects of offspring size. 2). For non-feeding larvae, the first time an individual is able to feed is once metamorphosis is complete and feeding structures are fully functioning.

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Advances in Marine Biology, Vol. 53 by D.W. Sims

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