Induced reproduction and reproductive characteristics of Rhinelepis aspera Agassiz, 1829 (osteichthyes: Siluriformes, Loricariidae)

Rhinelepis aspera is the largest Loricariidae species found in the São Francisco river basin where it is now rarely caught. Brooders kept in tanks were hypophysed with crude carp pituitary extract (CCPE). Approximately 82% of the females responded positive to the treatment. The egg was opaque, demersal, round, yellow and adhesive. Egg stripping was done at 212 hour-degrees (= 8.2 h) after application of the second dose of CCPE (water temperature = 25-26 ºC). Hatching of the larvae occurred at 1022 hour-degrees (= 42.2 h), after fertilization of the eggs (water temperature =24-25 ºC). Fertilization rate of the eggs was 72%. Absolute fecundity (AF), initial fertility (IF) and final fertility (FF) in relation to the females' body weight are expressed, respectively, by the equations: AF = - 33993 + 122308 Wt (r² = 0.88), IF = - 14823 + 58619 Wt (r² = 0.71) and FF = - 6553 + 29741 (r² = 0.61)

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Digenea of Hoplias intermedius and Hoplias malabaricus (Actinopterygii, Erythrinidae) from upper São Francisco River, Brazil

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612015038 ◽

2015 ◽

Vol 24 (2) ◽

pp. 129-135 ◽

Cited By ~ 7

Author(s):

Danielle Priscilla Correia Costa ◽

Cassandra Moraes Monteiro ◽

Marilia Carvalho Brasil-Sato

Keyword(s):

River Basin ◽

Feeding Habits ◽

Minas Gerais ◽

New Host ◽

Hoplias Malabaricus ◽

Parasitic Fauna ◽

Sao Francisco River ◽

São Francisco River ◽

New Location

A total of 103 specimens of Hoplias intermedius (Günther, 1864) and 86 specimens of H. malabaricus (Bloch, 1794) from the upper São Francisco River, State of Minas Gerais were collected between April 2011 and August 2013, and their parasitic fauna were investigated. Four species of Digenea were found: metacercariae of Austrodiplostomum sp., and Ithyoclinostomum sp.; and adult specimens of Phyllodistomum spatula Odhner, 1902, and Pseudosellacotyla lutzi (Freitas, 1941) Yamaguti, 1954. The prevalence of the metacercariae was higher than that of the adult digeneans of erythrinids from the upper São Francisco River as a result of piscivorous feeding habits of these adult erythrinids. The presence of metacercariae and adult digeneans indicate that they act as intermediate and definitive hosts, respectively, in their biological cycles. Hoplias intermedius is a new host for the four species of Digenea, and the São Francisco River basin is a new location for the known geographical distributions of P. spatula and P. lutzi.

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Evaluation of Eta Model Rainfall Forecasts at São Francisco River Basin in Minas Gerais, Brazil

Anuário do Instituto de Geociências - UFRJ ◽

10.11137/2015_2_15_23 ◽

2016 ◽

Vol 38 (2) ◽

pp. 15

Author(s):

R. M. G. VIEIRA ◽

C. P. DERECZYNSKI ◽

S. C. CHOU ◽

J. L. GOMES ◽

A. C. PAIVA NETO

Keyword(s):

River Basin ◽

Minas Gerais ◽

Sao Francisco River ◽

São Francisco River ◽

Eta Model

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Integrated spatiotemporal trends using TRMM 3B42 data for the Upper São Francisco River basin, Brazil

Environmental Monitoring and Assessment ◽

10.1007/s10661-018-6536-3 ◽

2018 ◽

Vol 190 (3) ◽

Cited By ~ 11

Author(s):

Celso Augusto Guimarães Santos ◽

Reginaldo Moura Brasil Neto ◽

Richarde Marques da Silva ◽

Jacqueline Sobral de Araújo Passos

Keyword(s):

River Basin ◽

Sao Francisco River ◽

Spatiotemporal Trends ◽

São Francisco River ◽

Trmm 3B42

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A poorly known case of watershed transposition between the São Francisco and upper Paraná river basins

Neotropical Ichthyology ◽

10.1590/s1679-62252005000300015 ◽

2005 ◽

Vol 3 (3) ◽

pp. 449-452 ◽

Cited By ~ 25

Author(s):

Orlando Moreira Filho ◽

Paulo Andreas Buckup

Keyword(s):

River Basin ◽

Fish Fauna ◽

Rio Grande ◽

River Basins ◽

Hydroelectric Power ◽

Sao Francisco River ◽

Parana River ◽

São Francisco River ◽

Upper Paraná River ◽

Parana Basin

During construction of the Furnas hydroelectric power dam in the upper rio Paraná basin in the early 1960s, the rio Piumhi drainage outflow was diverted into the headwaters of the São Francisco river basin. The rio Piumhi was a right bank tributary of the rio Grande, which unites with the rio Paranaíba to form the rio Paraná. The transposition allowed the entire fish fauna of the rio Piumhi and associated swamps, lakes, and tributaries to intermingle with the fish fauna of the São Francisco basin via the ribeirão Sujo, a right bank tributary of the São Francisco. The transposition of the watershed may have had a major impact on the current composition of the fish fauna of the upper rio São Francisco watershed.

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First description of B chromosomes in the family Auchenipteridae, Parauchenipterus galeatus (Siluriformes) of the São Francisco River basin (MG, Brazil)

Micron ◽

10.1016/j.micron.2009.03.004 ◽

2009 ◽

Vol 40 (5-6) ◽

pp. 552-559 ◽

Cited By ~ 28

Author(s):

Roberto Laridondo Lui ◽

Daniel Rodrigues Blanco ◽

Vladimir Pavan Margarido ◽

Orlando Moreira Filho

Keyword(s):

River Basin ◽

B Chromosomes ◽

Sao Francisco River ◽

São Francisco River ◽

The Family

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THERMAL REQUIREMENTS OF CITRUS FRUITS GRAFTED ONTO ROOTSTOCKS IN THE LOW-MIDDLE REGION OF THE SÃO FRANCISCO RIVER BASIN

Revista Caatinga ◽

10.1590/1983-21252018v31n209rc ◽

2018 ◽

Vol 31 (2) ◽

pp. 336-343

Author(s):

FÁDIA SAMARA SANTOS NASCIMENTO ◽

VALTEMIR GONÇALVES RIBEIRO ◽

DÉBORA COSTA BASTOS ◽

JUCIENY FERREIRA DE SÁ ◽

PEDRO HENRIQUE DIAS NASCIMENTO

Keyword(s):

River Basin ◽

Titratable Acidity ◽

Soluble Solids ◽

Production Cycle ◽

Middle Region ◽

Degree Days ◽

Sao Francisco River ◽

São Francisco River ◽

D 12 ◽

Accumulated Degree Days

ABSTRACT To understand the production cycle of a particular cultivar in a given region, it is necessary to obtain information related to its phenology and the accumulated degree days. The purpose of this study was to evaluate the phenological cycle of citrus species grafted onto two rootstocks and grown in the Low-Middle Region of the São Francisco River Basin, in particular with respect to accumulated degree days. The experiment was conducted using ‘Rubi’ and ‘Pera D-12’ oranges and ‘Page’ mandarins. Two rootstocks were used, namely ‘Cravo’ and ‘Volkameriano’ lemon species that were drip irrigated in the Campo Experimental de Bebedouro, an experimental field owned by Embrapa Semiárido. ‘Page’ mandarins with ‘Cravo’ or ‘Volkameriano’ rootstocks exhibited a subperiod (0-10) of 183.32 and 181.24 days, respectively. Meanwhile, ‘Pera D-12’ and ‘Rubi’ oranges with ‘Cravo’ rootstocks had values of 249.57 and 178.58 days, respectively, while those with ‘Volkameriano’ rootstocks had values of 226.35 and 200.41 days, respectively. The accumulated degree days were measured from the initial sprouting to harvesting, which took place when the fruits presented a soluble solids/titratable acidity ratio equal to or greater than 12. ‘Page’ mandarins required 2,720 degree days, whereas ‘Pera D-12’ and ‘Rubi’ oranges required approximately 3,390 and 2,280 degree days, respectively. Finally, ‘Pera D-12’ and ‘Rubi’ oranges with either rootstock presented cycles characterized as mid-season and precocious, respectively, while ‘Page’ mandarins had precocious cycles.

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Application of Markov chains to Standardized Precipitation Index (SPI) in São Francisco River Basin

Ambiente e Agua - An Interdisciplinary Journal of Applied Science ◽

10.4136/ambi-agua.2311 ◽

2019 ◽

Vol 14 (3) ◽

pp. 1

Author(s):

Esdras Adriano Barbosa dos Santos ◽

Tatijana Stosic ◽

Ikaro Daniel de Carvalho Barreto ◽

Laélia Campos ◽

Antonio Samuel Alves da Silva

Keyword(s):

Markov Chains ◽

River Basin ◽

Arid Region ◽

Standardized Precipitation Index ◽

Precipitation Index ◽

Severe Drought ◽

Sao Francisco River ◽

São Francisco River ◽

Semi Arid Region ◽

Semi Arid

This work evaluated dry and rainy conditions in the subregions of the São Francisco River Basin (BHSF) using the Standardized Precipitation Index (SPI) and Markov chains. Each subregion of the BHSF has specific physical and climatic characteristics. The data was obtained from the National Water Agency (ANA), collected by four pluviometric stations (representative of each subregion), covering 46 years of data, from 1970 to 2015. The SPI was calculated for the time scales of six and twelve months and transition probabilities were obtained using the Markov chain. Transition matrices showed that, at both scales, if the climate conditions were severe drought or rainy, switching to another class would be unlikely in the short term. Correlating this information with the probabilities of the stationary distribution, it was possible to find the regions that are most likely to be under rainy or dry weather in the future. The recurrence times calculated for the stations that belong to the semi-arid region were smaller when compared to the value of the return period of the representative station of Upper São Francisco that has higher levels of precipitation, confirming the predisposition of the semi-arid region to present greater chances of future periods of drought.

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