In a field experiment, we found that sand gobies at the marine site suffered from severe egg predation by netted dogwhelks Nassarius nitidus, which are lacking at the brackish site. In addition, females may gain direct reproductive benefits from multiple mating. Association between sperm longevity and swimming distance. We did not, however,! The significance of the fitted model was assessed using ANOVA with type III sums of squares tested with an analysis of deviance on a χ 2 distribution using the R package car Accessed December 14, A role for haploid selection.
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Haploid selection within a single ejaculate increases offspring fitness
Comparisons of allele frequency between the outer vs. Levitan DR Sperm velocity and longevity trade off each other and influence fertilization in the sea urchin Lytechinus variegatus. The ejaculate of one male was divided into two equal parts, and each part was exposed to one of two treatments. The sequencing data from sperm samples and finclip reported in this paper have been deposited in the European Nucleotide Archive accession no. Offspring viability during the first 24 hpf did not differ between the treatments 25 s: We let each female mate with a large and a small male, and measured diameter, weight, lipid and protein content of the eggs.