18 research outputs found
On complexity of special maximum matchings constructing
For bipartite graphs the NP-completeness is proved for the problem of
existence of maximum matching which removal leads to a graph with given
lower(upper)bound for the cardinality of its maximum matching.Comment: 12 pages, 8 figures. Discrete Mathematics, to appea
CAFF CBMP Report No. 19 - Circumpolar Biodiversity Marine Monitoring Plan - background paper
CAFF CBMP Report No. 19 - Circumpolar Biodiversity Marine Monitoring Plan - background pape
CAFF Monitoring Series Report No.3 - Arctic Marine Biodiversity Monitoring Plan (CBMP-MARINE PLAN)
CAFF Monitoring Series Report No.3 - Arctic Council's CAFF Working Group Arctic Marine Biodiversity Monitoring Plan (CBMP-MARINE PLA
New records of Monstrilloida Sars, 1901 (Crustacea: Copepoda) from Rio Grande do Norte (northeastern coast of Brazil)
Checklist da classe appendicularia (Chordata: Tunicata) do Estado de SĂŁo Paulo, Brasil
Estimating juvenile copepod growth rates: corrections, inter-comparisons and recommendations
The 2 most common experimental methods used to estimate rates of juvenile growth in marine copepods are the molt rate (MR) method, and the artificial cohort (AC) method. Recently, we showed the equations used in the MR method to be incorrect, and proposed a modified molt rate (MMR) method. Here, using statistical and model approaches, we compare the AC and MMR methods under various scenarios to quantify their errors. Although the AC and MMR methods both use a combination of field sampling and simulated in situ incubations to estimate somatic growth, they differ in several important characteristics. The AC method determines growth by the change in mean weight during incubation. Mean weight of copepods in the samples can be determined directly, or inferred from mean weight by life stage or from lengthâweight regressions. We show that substantial error is avoided only if weights are measured directly (ACdirect). The ACdirect method is insensitive to variable age within stage due to mortality or variable recruitment in the sampled population, an important advantage over the MMR method. However, the ACdirect method is sensitive to variation in growth rate during incubation, which does not affect the MMR method. We therefore recommend that most experimental estimates of growth rate should apply the ACdirect method, with the MMR as a suitable alternative provided its biases are considered. An indirect method based on life stage is biased and we no longer recommend it, and an indirect method based on lengthâweight regression provides an intermediate level of bias