Epigean and subterranean ichthyofauna from the São Domingos karst area, Upper Tocantins River basin, Central Brazil

Two cave populations of Aspidoras albater catfish with reduced eyes and pigmentation were recently found near the city of Posse, São Domingos karst area, Goiás State, representing the first known case of a troglomorphic callichthyid catfish. Cave specimens are described and compared to epigean specimens of A. albater, but morphometric differences between the epigean and the cave populations are not adequate to delimit as distinct species.

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Subterranean biodiversity in the Serra da Bodoquena karst area, Paraguay river basin, Mato Grosso do Sul, Southwestern Brazil

Biota Neotropica ◽

10.1590/1676-06032014011414 ◽

2014 ◽

Vol 14 (3) ◽

Cited By ~ 17

Author(s):

Lívia Medeiros Cordeiro ◽

Rodrigo Borghezan ◽

Eleonora Trajano

Keyword(s):

River Basin ◽

Sustainable Use ◽

Karst Area ◽

Karst Aquifers ◽

Effective Protection ◽

Mato Grosso ◽

Base Level ◽

Paraguay River ◽

Mato Grosso Do Sul ◽

Subterranean Species

We present herein a synthesis of faunistic data from caves in the Serra da Bodoquena karst area, middle Paraguay River basin, Mato Grosso do Sul State. Those include phreatic, submerged and dry caves. Emphasis is given to troglobites (exclusively subterranean species), potentially threatened due to their morphological, physiological and behavioral specializations, associated to generally small distributions. The Bodoquena karst area distinguishes as a spot of high diversity of troglobites, such as trichomycterid and heptapterid catfishes, aquatic planarians and gastropods, arachnids (Eusarcus opilionids, ctenid spiders), Polydesmida diplopods, several collembolans, some insects, and Peracarida crustaceans, which include interesting phylogenetic relicts as spelaeogriphaceans. Four geographic compartments corresponding to microbasins, seemingly with biogeographic importance for the subterranean fauna, are recognized. Phreatobic troglobites (Trichomycterus catfishes, aquatic peracarids, planarians) distribute widely across these compartments and some well beyond (the spelaeogriphacean Potiicoara brasiliensis reaches Mato Grosso state), while those living in base-level streams (Rhamdia and Ancistrus catfishes) and the terrestrial ones, that live in the vadose (aerated zone) are generally restricted to one compartment. Many subterranean ecosystems in Mato Grosso do Sul are endangered by several threats described here and urgent actions for effective protection are required to guarantee a sustainable use of the land and the karst aquifers.

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Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil

Neotropical Ichthyology ◽

10.1590/s1679-62252007000400007 ◽

2007 ◽

Vol 5 (4) ◽

pp. 479-484 ◽

Cited By ~ 4

Author(s):

Andréa L. Neuberger ◽

Elineide E. Marques ◽

Carlos S. Agostinho ◽

Rafael J. de Oliveira

Keyword(s):

River Basin ◽

Reproductive Biology ◽

Mean Value ◽

Reproductive Period ◽

Total Weight ◽

Individual Female ◽

Relative Fecundity ◽

Mean Diameter ◽

Tocantins River ◽

The Individual

In order to evaluate aspects of the reproductive biology of Rhaphiodon vulpinus in the Upper and Middle Tocantins River, samples were taken monthly from October, 1999 through September, 2001, by means of gill nets. Males, which were more abundant than females (chi2 146.87: df=1: p<0.05), matured at a smaller size. The reproductive period of the species extended essentially from November through January, with a peak of activity in November. Fecundity, with an estimated mean value of 98,185 oocytes, varied from 38,177 to 215,841 oocytes, and it did not correlate with the length of the individual female analyzed (r=0.4663: p=0.206). Relative fecundity was 130.6 oocytes/g total weight. Mature oocytes had a mean diameter of 0.98 mm, corresponding to a volume of 0.50 mm³.

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Analysis of evapotranspiration and biomass in pastures with degradation indicatives in the Upper Tocantins River Basin, in Brazilian Savanna

Revista CERES ◽

10.1590/0034-737x201663060002 ◽

2016 ◽

Vol 63 (6) ◽

pp. 754-760 ◽

Cited By ~ 4

Author(s):

Ricardo Guimarães Andrade ◽

Antônio Heriberto de Castro Teixeira ◽

Janice Freitas Leivas ◽

Sandra Furlan Nogueira

Keyword(s):

River Basin ◽

Large Scale ◽

Meteorological Data ◽

Simple Algorithm ◽

Production Potential ◽

Pasture Degradation ◽

Ndvi Time Series ◽

Tocantins River ◽

Remote Sensing Techniques ◽

Degraded Pastures

ABSTRACT The objective of this study was to apply the Simple Algorithm For Evapotranspiration Retrieving (SAFER) with MODIS images together with meteorological data to analyze evapotranspiration (ET) and biomass production (BIO) according to indicative classes of pasture degradation in Upper Tocantins River Basin. Indicative classes of degraded pastures were obtained from the NDVI time-series (2002-2012). To estimate ET and BIO in each class, MODIS images and data from meteorological stations of the year 2012 were used. The results show that compared to not-degraded pastures, ET and BIO were different in pastures with moderate to strong degradation, mainly during water stress period. Therefore, changes in energy balance partition may occur according to the degradation levels, considering that those indicatives of degradation processes were identified in 24% of the planted pasture areas. In this context, ET and BIO estimates using remote sensing techniques can be a reliable indicator of forage availability, and large-scale aspects related to the degradation of pastures. It is expected that this knowledge may contribute to initiatives of public policies aimed at controlling the loss of production potential of pasture areas in the Upper Tocantins River Basin in the state of Goiás, Brazil.

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Reproductive behavior, development and eye regression in the cave armored catfish, Ancistrus cryptophthalmus Reis, 1987 (Siluriformes: Loricariidae), breed in laboratory

Neotropical Ichthyology ◽

10.1590/s1679-62252009000300016 ◽

2009 ◽

Vol 7 (3) ◽

pp. 479-490 ◽

Cited By ~ 7

Author(s):

Sandro Secutti ◽

Eleonora Trajano

Keyword(s):

Reproductive Behavior ◽

Body Shape ◽

Life Cycles ◽

Body Growth ◽

Karst Area ◽

Comparable Data ◽

Central Brazil ◽

Behavior Development ◽

Slow Development ◽

Cave Environment

The troglobitic armored catfish, Ancistrus cryptophthalmus (Loricariidae, Ancistrinae) is known from four caves in the São Domingos karst area, upper rio Tocantins basin, Central Brazil. These populations differ in general body shape and degree of reduction of eyes and of pigmentation. The small Passa Três population (around 1,000 individuals) presents the most reduced eyes, which are not externally visible in adults. A small group of Passa Três catfish, one male and three females, reproduced spontaneously thrice in laboratory, at the end of summertime in 2000, 2003 and 2004. Herein we describe the reproductive behavior during the 2003 event, as well as the early development of the 2003 and 2004 offsprings, with focus on body growth and ontogenetic regression of eyes. The parental care by the male, which includes defense of the rock shelter where the egg clutch is laid, cleaning and oxygenation of eggs, is typical of many loricariids. On the other hand, the slow development, including delayed eye degeneration, low body growth rates and high estimated longevity (15 years or more) are characteristic of precocial, or K-selected, life cycles. In the absence of comparable data for close epigean relatives (Ancistrus spp.), it is not possible to establish whether these features are an autapomorphic specialization of the troglobitic A. cryptophthalmus or a plesiomorphic trait already present in the epigean ancestor, possibly favoring the adoption of the life in the food-poor cave environment. We briefly discuss the current hypotheses on eye regression in troglobitic vertebrates.

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An important site for conservation of bats in Brazil: Passa Três cave, São Domingos karst area, with an updated checklist for Distrito Federal (DF) and Goiás state

Subterranean Biology ◽

10.3897/subtbiol.28.31801 ◽

2018 ◽

Vol 28 ◽

pp. 39-51 ◽

Cited By ~ 2

Author(s):

Maria Elina Bichuette ◽

Eliana do Amaral Gimenez ◽

Ives Simões Arnone ◽

Eleonora Trajano

Keyword(s):

Rare Species ◽

Abundant Species ◽

Karst Area ◽

Central Brazil ◽

Distrito Federal ◽

Threatened Fauna ◽

Important Site

A checklist of bats from Distrito Federal (DF) and Goiás state (GO) and, particularly a single cave (Passa Três cave), located in São Domingos karst area (GO), central Brazil, is presented. Data is based on literature and surveys carried out during 2,000 years. In total, 66 species were recorded, with 30 using caves as shelters. Passa Três cave harbors nine Phyllostomidae species; the most abundant species werePlatyrrhinuslineatus, Lonchorhinaaurita,DesmodusrotundusandCarolliaperspicillata; and the less abundantsTrachopscirrhosus,AnouracaudiferandGlossophagasoricina. Besides, the cave is shelter of two threatened bats -Lonchophylladekeyseri(Endangered category) andLonchorhinaaurita(Vulnerable category), included at Brazilian List of Threatened Fauna, and of a rare species,Lionycterisspurrelli. Passa Três cave shows enough attributes to be considered as a SICOM (Sites of Importance for Conservation of Bats), which would ensure its protection.

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A new species of the Ololygon catharinae species group (Anura: Hylidae) from the Cerrado biome, State of Goiás, Central Brazil

Zootaxa ◽

10.11646/zootaxa.4425.2.5 ◽

2018 ◽

Vol 4425 (2) ◽

pp. 283 ◽

Cited By ~ 2

Author(s):

SHEILA PEREIRA DE ANDRADE ◽

DANUSY LOPES SANTOS ◽

CEZAR FILHO ROCHA ◽

JOSÉ P. JR. POMBAL ◽

WILIAN VAZ-SILVA

Keyword(s):

New Species ◽

River Basin ◽

Dorsal View ◽

Species Group ◽

Dry Forest ◽

Medium Size ◽

Morphological Attributes ◽

Cerrado Biome ◽

Central Brazil ◽

A New Species

We describe a new species of Ololygon from the Cerrado biome, Central Brazil. The new species is assigned to the Ololygon catharinae species group based in morphological attributes. Ololygon goya sp. nov. in known only from type locality—Sítio d’Abadia municipality, State of Goiás—and associated with riparian environments connected to seasonal dry forest on the banks of the Corrente river, a tributary of the Paranã river basin. The new species is characterized by the combination of the following characters: medium size (24.4–38.8 mm SVL); snout subovoid in dorsal view; canthus rostralis well defined; males with hypertrophied forearms and nuptial pads; inguinal region and hidden surfaces of thigh with irregular dark brown spots on pale yellowish background. We also describe the external morphology and oral morphology of tadpoles, and the advertisement calls of the new species.

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