Maturation and growth curves of Macrobrachium Carcinus (Linnaeus) (Crustacea, Decapoda, Palaemonidae) from Ribeira de Iguape River, southern Brazil

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Reproductive indices in natural nests of giant Amazon river turtles Podocnemis expansa (Schweigger, 1812) (Testudines, Podocnemididae) in the Environmental Protection Area Meanders of the Araguaia river

Realizou-se a contagem dos ovos n��o eclodidos, dos filhotes vivos e mortos de Podocnemis expansa oriundos de 327 ninhos naturais, localizados nas praias da ��rea de Prote����o Ambiental (APA) - Meandros do Rio Araguaia, onde se determinou a porcentagem de eclos��o dos ovos (94,63%); n��o eclos��o (5,37%); sobreviv��ncia (94,24%) e mortalidade dos filhotes (5,76%), e a m��dia de filhotes mortos durante os 15 dias no ber����rio (0,97%). A m��dia do total de filhotes por ninho foi determinada pela soma do n��mero de filhotes vivos e mortos divididos pelo total de ninhos, enquanto que a m��dia do total de ovos por ninho foi determinada pela soma do n��mero de filhotes vivos, mortos e ovos n��o eclodidos divididos pelo total de ninhos. Com isso, obtiveram-se os valores m��dios do n��mero de filhotes vivos (88,98 �� 23,94); mortos (0,37 �� 0,93); ovos n��o eclodidos (5,07 �� 9,57), e total de ovos (94,42 �� 21,30). A efici��ncia reprodutiva da popula����o selvagem de P. expansa pode ser afetada por muitos fatores ambientais, como temperatura, umidade e precipita����o. Al��m disso, fatores influenciados pelo homem, como a presen��a de produtos qu��micos na ��gua e a possibilidade de doen��as infecciosas, tamb��m t��m impacto significativo. Os dados dos ��ndices reprodutivos obtidos neste estudo s��o indispens��veis para futuras investiga����es de anomalias de incuba����o.

Histopathology of gills of Piaractus mesopotamicus (Holmberg, 1887) and Prochilodus lineatus (Valenciennes, 1836) infested by monogenean and myxosporea, caugth in Aquidauana River, State of Mato Grosso do Sul, Brazil

Realizou-se an��lise histol��gica de br��nquias de 15 esp��cimes de Piaractus mesopotamicus e 19 Prochilodus lineatus coletados de abril a novembro de 2004, no Rio Aquidauana, MS, com intuito de contribuir com achados anatomopatol��gicos em br��nquias dessas esp��cies de peixes de ��gua doce. Amostras de br��nquias foram fixadas em formalina 10%, tamponadas e processadas conforme rotina histol��gica. em P. mesopotamicus observou-se presen��a de monog��nea e cistos de mixospor��dio da esp��cie Henneguya piaractus, com localiza����o intralamelar em v��rios est��gios de desenvolvimento, localizados em todas as regi��es (basal, mediana ou distal) das lamelas. Cistos intraepiteliais causaram dilata����o e deforma����o das lamelas vizinhas. em br��nquias de P. lineatus, observou-se presen��a de monog��nea. Nas duas esp��cies de hospedeiro foram registradas hiperplasia do epit��lio branquial e desorganiza����o estrutural das lamelas em extensas regi��es, altera����es que causaram a fus��o lamelar. em poucos casos registrou-se presen��a de c��lulas inflamat��rias mononucleares e focos hemorr��gicos na regi��o distal das lamelas.

Haematological and gill responses in parasitized tilapia from valley of Tijucas River, SC, Brazil

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Suckling and allosuckling in river buffalo calves and its relation with weight gain

The aim of the present study was to investigate if river buffalo calves (Bubalus bubalis) have equal access to all cows and if milk is thus equally available to all of them. We recorded suckling/allosuckling behaviour and weight gain (WG) of 29 calves (14 males and 15 females), with special consideration to their sex, birth order (BO) and age. Cows' nursing behaviour and milli production (MP) were also considered. While males tended to be born earlier than females during this study, this was not the trend in the overall herd records. The cows' MP was not effected by the calves' sex. However, bull-calves presented greater mean WG, and mean times spent in individual filial (IF) and in communal nonfilial (CNF) suckling than heifer-calves, which showed greater communal filial (CF) suckling than the former during the first 4 months of life. The WG was associated with IF for bull-calves (r = 0.680 and 0.765, respectively, for the periods from birth to 4th and 8th months of age), and to CNF for heifer-calves (r = 0.628, for the period from birth to 8th month). Results from multiple regression analysis showed independent effects of each suckling category on the calf WG, and such effects were variable according to the calf's sex. BO was negatively correlated to calves' WG (bull-calves: r(s) = - 0.873 and - 0.799, from birth to 4th and gth months, respectively; heifer-calves: r(s) = - 0.531 from birth to 4th month). Specifically for bull-calves, there was a positive correlation between BO and MP (r(s) = 0.528 and 0.633, from birth to 4th and 8th months of age, respectively). The correlation between BO and IF was negative in both sexes, indicating that calves that were born early had more opportunities to suckle individually from their mothers. For heifer-calves, BO was positively correlated with CF (two periods), and negatively with CNF (from birth to 8th month of age), suggesting that heifer-calves were most often accompanied by other calves during suckling when they were born later. The data taken together indicate that sex and/or BO influenced decisively social interactions during suckling, promoting differential development among the calves. In animal husbandry, if a homogenous WG is desired, these factors have to be taken into consideration. (C) 2000 Elsevier B.V. B.V. All rights reserved.

PCJ River Basins' Water Availability Caused by Water Diversion Scenarios to Supply Metropolitan Areas of So Paulo

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Histoarchitectural Features of the Hepatopancreas of the Amazon River Prawn Macrobrachium amazonicum

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Effect of polyunsaturated fatty acids on the fecundity of the Amazon river prawn Macrobrachium amazonicum (Heller, 1862)

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Banana Peel Applied to the Solid Phase Extraction of Copper and Lead from River Water: Preconcentration of Metal Ions with a Fruit Waste

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

EVALUATION of HEAVY METAL AVAILABILITY IN CONTAMINATED SEDIMENTS FROM THE ILHA SOLTEIRA HYDROELECTRIC DAM on THE PARANA RIVER AT ILHA SOLTEIRA, SP, BRAZIL

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Sediment grain size distribution and heavy metals determination in a dam on the Parana River at Ilha Solteira, Brazil

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Synthesis, characterization, and application of modified silica in the removal and preconcentration of lead ions from natural river water

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Twelve loci from HSA10, HSA11 and HSA20 were comparatively FISH-mapped on river buffalo and sheep chromosomes

Ten type I loci from HSA 10 (IL2RA and VIM), HSA11 (HBB and FSHB) and HSA20 (THBD, AVP/OXT, GNAS1, HCK and TOP1) and two domestic cattle type II loci (CSSM30 and BL42) were FISH mapped to R-banded river buffalo (BBU) and sheep (OAR) chromosomes. IL2RA (HSA 10) maps on BBU 14q13 and OAR13q13, VIM (HSA 10) maps on BBU14q15 and OAR13q15, HBB (HSA11) maps on BBU16q25 and OAR15q23, FSHB (HSA11) maps on BBU16q28 and OAR15q26. THBD (HSA20) maps on BBU 14q15 and OAR13q15 while AVP/OXT. GNAS1, HCK, and TOP I (HSA20) as well as CSSM30 and BL42 map on the same large band of BBU 14q22 and OAR13q22. All loci were mapped on the same homologous chromosomes and chromosome bands of the two species, and these results agree with those earlier reported in cattle homologous chromosomes 15 and 13. respectively, confirming the high degree of both banding and physical map similarities among the bovid species. Indirect comparisons between physical maps achieved on bovid chromosomes and those reported on HSA10, HSA11 and HSA20 were performed. Copyright (C) 2001 S. Karger AG, Basel.

Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paran�� River basin, Brazil

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)