The non-random occupation of habitats is termed habitat selection. Some species of whip spiders select trees with burrows at their base, while others use substrates such as rocks. Here, we investigated the habitat use by Charinus asturius Pinto-da-Rocha, Machado & Weygoldt, 2002, an endemic species of Ilhabela Island in Brazil. We found that C. asturius is more likely to be found under rocks that cover larger areas of substrate. Our results also suggest the existence of territorialism in C. asturius and (...) show that C. asturius adults may be found again on the same rock a week later. Additionally, our data show that C. asturius is present in a greater area of Ilhabela than previously documented. (shrink)

We present the first comprehensive taxonomic revision and review the biology of the olingos, the endemic Neotropical procyonid genus Bassaricyon, based on most specimens available in museums, and with data derived from anatomy, morphometrics, mitochondrial and nuclear DNA, field observations, and geographic range modeling. Species of Bassaricyon are primarily forest-living, arboreal, nocturnal, frugivorous, and solitary, and have one young at a time. We demonstrate that four olingo species can be recognized, including a Central American species (Bassaricyon gabbii), lowland species with (...) eastern, cis-Andean (Bassaricyon alleni) and western, trans-Andean (Bassaricyon medius) distributions, and a species endemic to cloud forests in the Andes. The oldest evolutionary divergence in the genus is between this last species, endemic to the Andes of Colombia and Ecuador, and all other species, which occur in lower elevation habitats. Surprisingly, this Andean endemic species, which we call the Olinguito, has never been previously described; it represents a new species in the order Carnivora and is the smallest living member of the family Procyonidae. We report on the biology of this new species based on information from museum specimens, niche modeling, and fieldwork in western Ecuador, and describe four Olinguito subspecies based on morphological distinctions across different regions of the Northern Andes. (shrink)

More widespread farming of species not typically used as livestock may be part of a sustainable approach for promoting human health and economic prosperity in a world with an increasing population; a current example is peccary farming in the Neotropics. Others have argued that species that are local to a region and which are usually not farmed should be considered for use as livestock. They may have a more desirable nutrient profile than species that are presently used as livestock. (...) It may also reduce the pressure from hunting on other wild species, and cause less environmental damage than exotic species. We propose a sentiocentric utilitarian framework that could be used to decide whether species that are local, but generally not used as livestock, should be farmed. To illustrate the use of our decision-making framework, we employ two contrasting neotropical case studies: the Spotted Paca (Cuniculus paca) and the Capybara (Hydrochoerus hydrochaeris). We argue that it may be acceptable to use non-sentient species that are typically not farmed as livestock. However, research should determine whether farming them offers human, environmental or sustainability benefits. In addition, we recommend that if invertebrate species are considered for farming, research should be conducted to determine the likelihood that they are sentient. Finally, given the ethical failings of current livestock farming practices, we argue that a high bar must be met if ‘new’ species that are sentient are to be farmed. (shrink)

A fauna sul-americana evolveu durante dezenas de milhões de anos em isolamento dos outros continentes. Isso conferiu-lhe um carácter muito particular, comprovado pelo enorme número de táxones endémicos da divisão biogeográfica em que se inclue o sub-continente – Região Neotropical.Quando os descobridores e colonizadores abordaram e foram penetrando no Brasil, no século XVI e seguintes, deparou-se-lhes uma fauna – abundante na época –, diversificada e estranha ao seu conhecimento da fauna europeia, quando muito também de algumas espécies asiáticas e africanas. (...) As tendências reveladas pelos ‘colonizadores-naturalistas’ na descrição dessa fauna foram diferentes. Uns denominaram-na como se de espécies europeias ou africanas se tratasse. Outros reconheceram a sua originalidade, adoptando a nomenclatura etnobiológica dos Índios, a qual reproduziram em sons da língua portuguesa. Pêro de Magalhães Gândavo, o primeiro português a produzir obra impressa em que se descreve a fauna brasílica, seguiu ambas as vias, conforme os casos. É do seu relato, publicado em 1576, que se apresentam e comentam alguns excertos neste artigo.South American biodiversity evolved for tens of million years in isolation. A most special composition of its fauna and flora has been the result of such an isolation period, the number of endemic taxa being very large. Biogeographers soon recognized the singularity of South America, including this sub-continent in a biogeographical division of the highest rank - the Neotropical Region. When Portuguese discoverers and explorers, from the 16th century on, passed into Brazil, they found a diversified and exotic fauna quite different from the European or African ones that they eventually knew. Some of them, namely jesuits and other educated people, described the most common or conspicuous species, indicating the main edible or dangerous properties of each one. Ethnobiological nomenclature or the common names of the closer European or African species have been applied by those ‘naturalists’. The first of them recording his observations and speculations on a printed book was Pêro de Magalhães Gândavo, who lived in Brazil for a few years before 1561. Comments on his interesting book, entitled História da Província de Santa Cruz, are presented in this paper. (shrink)

Drawing heavily upon natural history data from the Neotropical butterfly fauna, an attempt is made to develop a model, with testable hypotheses, to account for the evolution of egg-clustering and larval gregariousness. Given the high diversity of both plant and butterfly species in the American tropics, there is a higher incidence of egg-clustering there, including some species with aposematically-colored immature stages. Emphasis is placed on the need to examine both the physical (mechanical) toughness of larval food plants for larval feeding (...) success, and the spatial structuring of food plant populations. It is argued that when food plant spatial patchiness is high, the breadth of local food plant species usage low, plant growth rates high, fed-upon structures tough, butterfly dispersal low, and reproductive potential low, egg-clustering evolves. Such ecological character states, coupled with the occurrence of food plant patches in large sizes relative to the nutritional and fecundity needs of the butterfly specialist on the species, select for egg-clustering to ensure survival of the butterfly population in that habitat. It is emphasized that the model proposed here requires considerable examination through field studies. (shrink)