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 stories on quite a lot of themes that allows you to entice postgraduates and researchers in marine biology, fisheries technological know-how, ecology, zoology, oceanography. Eclectic volumes within the sequence are supplemented via 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 measurement in marine invertebrates * Discusses very important info at the social constitution and methods of delphinids * greater than 250 pages of the most recent discoveries in marine technology
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Additional info for Advances in Marine Biology, Vol. 53
Regardless, it appears in some species, larger mothers produce larger offspring and so not only are larger mothers contributing more offspring to the next generation but also they are contributing offspring of the highest quality. This has interesting implications for fisheries and population demographic models because, generally, populations with larger individuals are more likely to supply recruits in populations that contain mostly small individuals (Birkeland and Dayton, 2005). 2. 1. Habitat quality Given the effects of maternal nutrition and stress on offspring size, it is perhaps unsurprising that habitat quality also has a strong effect on the size of offspring.
Guisande and Harris (1995) found that hatching success and naupliar survival under conditions of starvation were positively correlated with egg size in the copepod Calanus helgolandicus. Similarly, Lonsdale and Levinton (1985) found, among populations, that egg size was positively correlated with naupliar survival under low-food conditions but not high-food conditions. 6 Relationship between egg size and developmental time (adjusted to development at 20 C using Q10 values) for serpulimorph polychaetes with planktotrophic larvae.
Such comparisons are inappropriate given that, depending on the relationship between offspring and performance (which of course will vary greatly among species), a very different optimal offspring size will be predicted for each individual species. 6. 7A–C summarize our view of the effects of maternal nutrition on each of the life-history stages for the three broad developmental modes, highlighting the major unknowns for each group and stage. Size of arrow represents our view of the relative strength of offspring-size effects between each stage.