Toward the Integration of Economics and Outdoor Recreation Management [PDF]
, 1986 The general theme of this bulletin is that improved management of public-sector recreational resources is a multidisciplinary task. To this end, we attempt to integrate elements of outdoor recreation management theory and economics.
Jubenville, Alan +2 more
core
Aquatic Hydrophilidae and Hydraenidae of Wisconsin (Coleoptera). I. Introduction, Key to Genera of Adults, and Distribution, Habitat, Life Cycle, and Identification of Species of \u3ci\u3eHelophorus\u3c/i\u3e Fabricius, \u3ci\u3eHydrochus\u3c/i\u3e Leach, and \u3ci\u3eBerosus\u3c/i\u3e Leach (Hydrophilidae), and Hydraenidae [PDF]
, 2017 The 3,920 Helophorus (Helophorinae) adults collected in Wisconsin included 16 species, two of which were new species. Helophorus orientalis and H. lacustris predominated.
Hilsenhoff, William L
core +2 more sources
Improving the value of field margins as foraging habitat for farmland birds [PDF]
Journal of Applied Ecology, 2009 1. Uncropped field margins are important foraging habitats on farmland for many declining bird species and are a key component of Agri-Environment Schemes across Europe. Maximizing the value of foraging habitats requires detailed knowledge of the factors influencing habitat selection and food availability. 2. We firstly conducted an observational study
David J. T. Douglas +2 more
openaire +1 more source
The Anatomical Record, EarlyView.We describe the functional anatomy of masticatory muscles in nine opossums, finding a generalized anatomical pattern with differences related to skull morphology. Variation in quantitative myological data and estimated bite force was mostly related to size, and the increase in bite force supports dietary diversification associated with size increase ...
Juann A. F. H. Abreu, Diego Astúa
wiley +1 more source
A Taxonomic and Ecological Study of the Asilidae of Michigan [PDF]
, 2017 Seventy-two species of Asilidae have been recorded from Michigan. An additional seven which may occur are included. Keys to subfamilies, genera and species are given. Two subfamilies and twenty-five genera are represented.
Baker, Norman T, Fischer, Roland L
core +3 more sources
WILD TURKEY RESTORATION IN “MARGINAL” IOWA HABITATS
Wildlife Society Bulletin, 1980 Abstract An aggressive restoration program has resulted in the release of 930 eastern wild turkeys Meleagris gallopavo silvestris at 64 sites in Iowa sine 1965. Only 1 release has failed, as evidenced by known reproduction at every site and growth and dispersal of turkey ...
openaire +2 more sources
The Anatomical Record, EarlyView.Abstract Basking sharks, Cetorhinus maximus (Gunnerus, Brugden [Squalus maximus], Det Kongelige Norske Videnskabers Selskabs Skrifter, 1765, vol. 3, pp. 33–49), feed by gaping their mouths and gill slits, greatly reorienting their cranial skeletons to filter food from water.
Tairan Li +12 more
wiley +1 more source
Ecological factors determining the density-distribution of Central European dragonflies (Odonata)
European Journal of Entomology, 2010 Habitat specificity is the most important factor affecting the regional distribution of dragonflies. Nevertheless, species with the highest specificity are not always the scarcest.
Filip HARABIŠ, Aleš DOLNÝ
doaj +1 more source
Alteration of sexual reproduction and genetic diversity in the kelp species Laminaria digitata at the southern limit of its range. [PDF]
PLoS ONE, 2014 Adaptation to marginal habitats at species range-limits has often been associated with parthenogenetic reproduction in terrestrial animals and plants. Laboratory observations have shown that brown algae exhibit a high propensity for parthenogenesis by ...
Luz Valeria Oppliger +7 more
doaj +1 more source
A preliminary treatment of the genus Campylopus (Musci: Dicranaceae) in Central America [PDF]
, 2013 There are 26 species of Campylopus in Central America. They are divided into three groups on the basis of two characters: the presence or absence in the costa of a ventral layer of enlarged, hyaline cells and the presence or absence in the stem of an ...
Allen, Bruce H.
core