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

By D.W. Sims

Advances in Marine Biology used to be first released in 1963. Now edited via David W. Sims (Marine organic organization, UK), the serial publishes in-depth and updated reports on quite a lot of themes with the intention to entice postgraduates and researchers in marine biology, fisheries technological know-how, ecology, zoology, oceanography. Eclectic volumes within the sequence are supplemented through thematic volumes on such themes 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 details at the social constitution and techniques of delphinids * greater than 250 pages of the newest discoveries in marine technology

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1987) found a strong, positive correlation between egg size and planktonic period across 36 species of non-feeding asteroid larvae. 2. Intraspecific comparisons There are very few examinations of the intraspecific effects of offspring size on developmental time or planktonic period in species with non-feeding larvae. Isomura and Nishimura (2001) found that larger larvae had longer lifetimes (measured as the time from the free-swimming stage to when the larvae died and therefore probably exceeds the time taken to become metamorphically competent) than smaller larvae within three species of pocilloporid corals.

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. For example, Sakai and Harada (2001) propose that if larger mothers can provision their offspring more efficiently than smaller mothers, then this will result in a correlation between maternal and offspring size.

It will be interesting to determine the effect that pollution will have on offspring size in other species as this may represent a previously unrecognized mechanism by which pollution can negatively affect marine populations. 2. Maternal size Within species across a wide variety of taxa, offspring size is correlated with maternal size (Sakai and Harada, 2001; Stearns, 1992). This correlation can be negative, for example in Conus marmoreus, egg size is negatively correlated with maternal size (Kohn and Perron, 1994) and in B.

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