Mutation rate estimates for 13 STR loci in a large population from Rio Grande do Sul, Southern Brazil

The patterns of habitat use by the franciscana dolphins (Pontoporia blainvillei) along its distribution are poorly known. This study investigates the patterns of habitat use with respect to depth for 181 individuals of different age, size, gender and reproductive condition off Rio Grande do Sul, southern Brazil. The results reveal that franciscanas are very homogeneously distributed according to depth. Individuals from all lengths utilize nearly the entire range of depths of the surveyed area. Larger or older animals do not use deeper waters than younger animals, indicating that body size and age are not limiting factors for franciscanas that occupy deeper or offshore waters. Gestation seems to not cause a change in the distribution of females. Although the sex-ratio of the overall data did not vary from 1:1 in different depth intervals, a small-scale comparison between the northern and southern coast demonstrated the existence of some kind of sexual segregation. Franciscana by-catch in Rio Grande do Sul is not sustainable and it is agreed that management procedures are needed. Nevertheless, the available data on species distribution do not allow the designing of a protected area in order to minimize the by-catches of a particular sex/reproductive class.

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Herpetofauna from an urban Pampa fragment in southern Brazil: composition, structure and conservation

Check List ◽

10.15560/12.5.1964 ◽

2016 ◽

Vol 12 (5) ◽

pp. 1964

Author(s):

Omar Machado Entiauspe-Neto ◽

Tângela Denise Perleberg ◽

Marco Antonio de Freitas

Keyword(s):

Natural History ◽

Urban Areas ◽

Rio Grande ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Faunal Composition ◽

Diversity Patterns ◽

Reptile Species ◽

History Of ◽

Composition Structure

Faunistic inventories regarding natural history of amphibians and reptiles are considered scarce and very little is known about their assemblages in urban areas; the Pampas morphoclimatic domain, also known as Uruguayan Savannah or Southern Grasslands, is also poorly known regarding their faunal composition. Herein, we present a checklist of 16 amphibian and 20 reptile species recorded over a course of four years in the Instituto Federal de Educação, Ciências e Tecnologia, Câmpus Pelotas-Visconde da Graça, in Pelotas, Rio Grande do Sul, Brazil. We also present data on natural history and discuss conservation efforts to be undertaken in the area, in one of the least preserved and known Brazilian morphoclimatic domains, providing insights into urban herpetofaunal diversity patterns and showing the importance of modified areas in its conservation.

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Toxomerus duplicatus Wiedemann, 1830 (Diptera: Syrphidae) preying on Microtheca spp. (Coleoptera: Chrysomelidae) larvae

Brazilian Journal of Biology ◽

10.1590/bjb.2014.0071 ◽

2014 ◽

Vol 74 (3) ◽

pp. 656-658 ◽

Cited By ~ 1

Author(s):

VS Sturza ◽

STB Dequech ◽

M Toebe ◽

TR Silveira ◽

A Cargnelutti Filho ◽

...

Keyword(s):

Pest Management ◽

Raphanus Sativus ◽

Insect Pests ◽

Rio Grande ◽

Integrate Pest Management ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

New Information ◽

Raphanus Sativus L ◽

Santa Maria

Microtheca spp. (Coleoptera: Chrysomelidae) are insect pests primarily related to Brassicaceae crops. In the State of Rio Grande do Sul (RS), southern Brazil, they are found on forage turnip, Raphanus sativus L. var. oleiferus Metzg., which is commonly grown during fall/winter seasons. This work reports the predation of Microtheca spp. larvae by Toxomerus duplicatus Wiedemann, 1830 (Diptera: Syrphidae) larvae, on forage turnip crop, in Santa Maria, RS. This register provides new information about Microtheca spp. natural enemies in Brazil, which might be a new option for integrate pest management of these species.

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Gastrointestinal parasites and prey items from a mass stranding of false killer whales, Pseudorca crassidens, in Rio Grande do Sul, Southern Brazil

Revista Brasileira de Biologia ◽

10.1590/s0034-71082001000100008 ◽

2001 ◽

Vol 61 (1) ◽

pp. 55-61 ◽

Cited By ~ 11

Author(s):

A. L. V. ANDRADE ◽

M. C. PINEDO ◽

A. S. BARRETO

Keyword(s):

Rio Grande ◽

Gastrointestinal Parasites ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Ommastrephes Bartramii ◽

Killer Whales ◽

Food Items ◽

Pseudorca Crassidens ◽

Mass Stranding ◽

Prey Items

The gastrointestinal tract of 14 false killer whales, 6 males and 8 females, stranded in June 1995 in southern Brazil, with total standard lengths from 338 to 507 cm, were analysed for endoparasites and food items. A pregnant female had a male foetus of 77.5 cm. Parasites were found in all 14 false killer whales. The nematode Anisakis simplex (Rudolphi, 1809) was found in the stomach of 57% of the animals and the acanthocephalan Bolbosoma capitatum (Linstow, 1889) Porta, 1908 was present in the intestine of all specimens and showed densities up to 600 m-1. An unidentified cestode (Tethrabothridae) was found also in the intestines of 14% of the individuals. The high infections of B. capitatum and A. simplex were not directly related with the cause of death. In the stomachs of four females, beaks of at least eight specimens of the oceanic and epipelagic species Ommastrephes bartramii (Lesueur, 1821) were found, with mantle lengths ranging from 189.8 to 360.9 mm. The distribution of O. bartramii in the coast of Rio Grande do Sul is consistent with false killer whales feeding in continental shelf waters.

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Multiple anthelmintic resistance in Southern Brazil sheep flocks

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612017058 ◽

2017 ◽

Vol 26 (4) ◽

pp. 427-432 ◽

Cited By ~ 10

Author(s):

Plínio Aguiar de Oliveira ◽

Beatriz Riet-Correa ◽

Pablo Estima-Silva ◽

Ana Carolina Barreto Coelho ◽

Bianca Lemos dos Santos ◽

...

Keyword(s):

Anthelmintic Resistance ◽

Rio Grande ◽

Gastrointestinal Parasites ◽

Southern Region ◽

Parasitic Infections ◽

Southern Brazil ◽

Parasite Control ◽

Rio Grande Do Sul ◽

Parasitic Resistance ◽

The Common

Abstract Gastrointestinal parasites represent an important cause of reduced productivity of sheep worldwide. As anthelmintic are still the main control tool for these parasites, this work evaluated the efficacy of commercially available active principles in 22 sheep flocks in the southern region of Rio Grande do Sul, Brazil. In each farm 10 sheep were randomly distributed in seven groups with the following treatments: abamectin; albendazole; closantel; levamisole; monepantel; trichlorphon and no anthelmintic (control). All flocks showed resistance to at least three anthelmintics and in 20 farms only two products demonstrated efficacy for parasitic control. In two farms, there was no susceptibility to the six active principles tested. The results of this study provide evidence that the common commercially available anthelmintic are not assuring effective chemical control of gastrointestinal parasitic infections in ovine flocks in the southern region of Rio Grande do Sul. Monepantel, the newest introduced drug in the Brazilian market was not effective in 18% of the flocks tested, confirming that the parasitic resistance can be established quickly after the introduction of new molecules mainly when alternative program of parasite control is not performed.

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On the fossil Remains of Panochthus Burmeister, 1866 (Xenarthra, Cingulata, Glyptodontidae) from the Pleistocene of southern Brazil

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201520140012 ◽

2015 ◽

Vol 87 (1) ◽

pp. 15-27 ◽

Cited By ~ 2

Author(s):

José D. Ferreira ◽

Martín Zamorano ◽

Ana Maria Ribeiro

Keyword(s):

South America ◽

Rio Grande ◽

Species Level ◽

External Morphology ◽

Latitudinal Distribution ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Diagnostic Features ◽

New Material

The genus Panochthus represents the last lineage of "Panochthini" recorded in the Pleistocene. This genus has a wide latitudinal distribution in South America, and in Brazil it occurs in the southern and northeastern regions. In this paper we describe new material (isolated osteoderms and caudal tube fragments) assigned to Panochthus from the state of Rio Grande do Sul (southern Brazil) and discuss some taxonomic issues related to Panochthus tuberculatus and Panochthus greslebini based on this material . The occurrence of P. greslebini is the first for outside the Brazilian Intertropical Region. In addition, we describe new diagnostic features to differentiate the osteoderms of P. greslebini and P. tuberculatus. Unfortunately, it was not possible to identify some osteoderms at the species level. Interestingly, they showed four distinct morphotypes characterized by their external morphology, and thus were attributed to Panochthus sp. Lastly, we conclude that in addition to P.tuberculatus registered to southern Brazil, there is another species of the genus, assignable to P. cf. P. greslebini. Our analysis reinforce the reliability of caudal tube characters for the classification of species of Panochthus.

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Freshwater temperature in the state of Rio Grande do Sul, Southern Brazil, and its implication for fish culture

Neotropical Ichthyology ◽

10.1590/s1679-62252008000200016 ◽

2008 ◽

Vol 6 (2) ◽

pp. 275-281 ◽

Cited By ~ 18

Author(s):

Luciano de Oliveira Garcia ◽

Carlos Eduardo Copatti ◽

Flávio Wachholz ◽

Waterloo Pereira Filho ◽

Bernardo Baldisserotto

Keyword(s):

Water Temperature ◽

Fish Species ◽

Native Species ◽

Amazon Basin ◽

Rio Grande ◽

The State ◽

Tropical Species ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Lower Growth

In this study we verified data of water temperatures collected by CORSAN-RS from 1996 to 2004 in several cities of the state of Rio Grande do Sul, southern Brazil, and analyzed the possibility of raising the most cultivated fish species in Brazil. The water temperature from 1996 to 2004 was 16 to 28ºC in summer, 17 to 23ºC in fall, 14 to 17ºC (down to 9ºC in the coldest months) in winter and 14 to 21ºC in spring. Native species of this state, such as silver catfish (Rhamdia quelen), traíra (Hoplias malabaricus), dorado (Salminus brasiliensis), pintado (Pimelodus maculatus), as well as carps (family Cyprinidae), are resistant to the low winter temperatures. These species have a lower growth rate in coldest months (winter/spring) but a good development in warmer months (summer/fall), reaching a satisfactory performance throughout the year. In the periods of more intense cold, mortality of some introduced species, such as surubim from Amazon Basin (Pseudoplatystoma sp.), pirapitinga (Piaractus brachypomus), pirarucu (Arapaimas gigas), pacu (Piaractus mesopotamicus), tambaqui (Colossoma macropomum) and Nile tilapia (Oreochromis niloticus) may occur. In addition, as most tropical species have a thermal range for growth and reproduction between 20 to 28ºC, some species may have poor development even in fall. Therefore, water temperature in this state should be considered in the choice of fish species to be cultivated.

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