New technologies for culturing and settling scleractinian coral larvae in the field are required to elucidate the role of recruitment in population dynamics and to provide options for reef rehabilitation. Natural multi-species aggregations of coral embryos, which frequently form slicks on the sea surface after large-scale annual spawnings, were identified as a potential resource for mass coral ...

done so in 1980–1984.3 Since the condom is widely available and does not require a visit to a provider, the rapid increase in its use at first intercourse suggests that young women and men may be relying less on family planning providers as their first source of protection against pregnancy. An analysis of 1982 NSFG data determined that 17% of sexually active women aged 15–24 in 1982 had visite...

The Iberian hare (Lepus granatensis Rosenhauert, 1856) is a widely distributed endemic species in the Iberian Peninsula. In order to improve our knowledge of its population dynamics, the relative abundance and population trends of the Iberian hare were studied in the autumns of 1995–2012 in a protected area (Doñana National Park) by spotlighting in two different habitats: marshland and ecotones.

D. RYAN NORRIS* 1 , PETER ARCESE† 1 , DAVID PREIKSHOT‡, DOUGLAS F. BERTRAM§ and T. KURT KYSER¶ * Department of Integrative Biology, University of Guelph, Guelph, ON, Canada N1G 2W1; † Centre for Applied Conservation Research, Department of Forest Sciences, 2424 Main Mall, University of British Columbia, Vancouver, BC, Canada V6T 1Z4; ‡ Aquatic Ecosystems Research Laboratory, Fisheries Center, 2...

1. This paper describes the effects of differences in food quantity and quality on selected life history traits of Ceriodaphnia pulchella. Animals were fed with four concentrations of two green algae, Scenedesmus obliquus and Chlamydomonas globosa, given separately as well as in a 1 : 1 mixture. 2. In most cases growth, reproduction and condition of the animals and consequently the rate of popu...

In nature, population dynamics are subject to multiple sources of stochasticity. State-space models (SSMs) provide an ideal framework for incorporating both environmental noises and measurement errors into dynamic population models. In this paper, we present a recently developed method, Particle Markov Chain Monte Carlo (Particle MCMC), for parameter estimation in nonlinear SSMs. We use one eff...

This paper aims to describe the population dynamics and to evaluate the stock of the seabob-shrimp Xiphopenaeus kroyeri on the coast of Pernambuco. Sampling was carried out between August/2011 and July/2012 in Sirinhaém, southern coast of Pernambuco. A total of 1201 individuals were analyzed, 673 females and 528 males. Total length (Lt) of females varied from 4.5 to 13.5 cm while the Lt of male...

In this paper we derive a criterion of trivial dynamics based on the theory of translation arcs. This criterion extends and unifies some results in the literature. Applications in continuous and discrete models of population dynamics are given.

Plankton images collected by Imaging FlowCytobot from 2006 to 2013 at the Martha’s Vineyard Coastal Observatory (Massachusetts, USA) were used to identify and quantify the occurrence of the diatom Guinardia delicatula and of a parasite that seems specific to this host. We observed infection with morphological stages that appear similar to the parasite Cryothecomonas aestivalis. Our results show...