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| Maia,Bruno Pereira; Ribeiro,Sandra Maria Franco; Bizzotto,Paula Maciel; Vono,Volney; Godinho,Hugo Pereira. |
| The catfish yellow-mandi, Pimelodus maculatus, is a valuable sporting and commercial fish of inland waters of Southeast Brazil including Igarapava Reservoir. It is a short-distance migrant that needs shorter stretches of free-flowing river to spawn compared to other Neotropical migrants. Igarapava Reservoir is one the 13 hydroelectric reservoirs, arranged in a cascade fashion, impounding the 1,300 km-long Grande River, SE Brazil. In this paper, we examined reproductive features and recruitment of the yellow-mandi in Igarapava Reservoir. We also evaluated the role of the Igarapava Fish Ladder (IFL) built around Igarapava Dam on the sustainability of its fisheries. Female adult yellow-mandis that were gill netted (nets of 8-20 cm stretch-mesh) during the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reservoir fisheries; Igarapava fish ladder; Stages of gonadal maturation; Fecundity. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200008 |
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| Godinho,Alexandre Lima; Godinho,Hugo Pereira. |
| ABSTRACT Pirá, Conorhynchos conirostris (Valenciennes, 1840), a large migratory catfish endemic to the São Francisco River (SFR), is listed as threatened in the red lists of both Brazil and the state of Minas Gerais. Although fishing for pirá has been prohibited, it is still an important fishery resource, particularly in the middle SFR. We used historical and current occurrence and abundance data regarding pirá to determine if it meets the IUCN criteria of a threatened species. Pirá occurs in the main course of the SFR as well as in its major tributaries. Unlike the most well-known migratory fishes of the SFR, pirá does not use floodplain lakes as nurseries. In the first half of the 20th century, pirá occurred from the upper to the lower SFR. Currently, it... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: IUCN; Red list; São Francisco River; Threatened fish. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100221 |
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| Mello,Gabriel Caetano Guimarães de; Santos,José Enemir dos; Guimarães-Cruz,Rodrigo José; Godinho,Alexandre Lima; Godinho,Hugo Pereira. |
| ABSTRACT We investigated the early life growth pattern of pacamã, Lophiosilurus alexandri , a catfish endemic to the rio São Francisco basin, Brazil. Pacamã larvae were kept in a galvanized trough for 29 days after hatching. We collected approximately 10 larvae daily (total number = 285). We obtained from each specimen the total length (independent variable) and 11 other body measurements (dependent variables). We performed linear regressions on the log-transformed data to determine the growth pattern of the body measurements and the respective inflexion point on the growth curves. Except for trunk length, trunk width and yolk sac volume, the remaining body measurements showed a positive allometric growth coefficient up to the respective IP followed by a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Early life; Fish rearing; Larval development; Pacamã; Rio São Francisco. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400677 |
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| Pompeu,Paulo dos Santos; Godinho,Hugo Pereira. |
| In the Neotropics, a large proportion of fish communities of large rivers use floodplain as habitats for feeding, reproduction, and refuge. An evaluation was made of the effects of extended dry periods on the species richness, abundance and local extinction of fish species in three marginal lagoons in the middle São Francisco River, southeastern Brazil. The studied lagoons fail to receive river floods during the study period (1994-1996). A gradual reduction in richness and abundance was observed in all lagoons. Migratory fish species had the highest probability to become extinct in the two lagoons that remained with large water volume. Species tolerant to low levels of dissolved oxygen had the lowest probability of local extinction in the lagoon showing an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floodplain; Migratory fish; Extended drought; Hypoxia. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000400006 |
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| Godinho,Hugo Pereira; Amorim,Vanessa Márcia da Cunha; Peixoto,Marco Túlio Diniz. |
| Realizaram-se experimentos relativos a crioprotetores, diluentes e soluções ativadoras pós-descongelamento com o sêmen de tilápia-nilótica Oreochromis niloticus, var. Chitralada. Utilizaram-se soluções crioprotetoras contendo DMSO ou metanol, em várias concentrações. O sêmen diluído na solução crioprotetora foi envazado em palhetas de 0,5 mL, congelado em botijão de vapor de nitrogênio líquido e, então, armazenado em nitrogênio líquido. A motilidade espermática do sêmen descongelado foi avaliada em soluções ativadoras de NaHCO3 119mM, NaCl 25 mM e água destilada. As taxas de motilidade espermática pós-descongelamento obtidas com sêmen criopreservado com metanol (concentração final = 7,5-12 %) foram de 31-46% e quando o crioprotetor utilizado foi o DMSO... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Criopreservação do sêmen; Crioprotetores; Taxa de diluição do sêmen; Taxa de motilidade espermática; Tilápia-nilótica. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982003000700001 |
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| Santos,José Enemir dos; Godinho,Hugo Pereira. |
| The larval ontogeny and swimming behavior of the characid fish Salminus brasiliensis (Cuvier, 1816) were studied under experimental laboratory conditions, from hatching to yolk absorption. At day 1, the larvae were transparent, with sparse dendrite chromatophores and a well-developed adhesive organ on the head. The retinal epithelial cells were initiating pigmentation. The branchial arches were at the initial phase of differentiation. The larvae were able to perform only vertical displacements and, when resting on the tank bottom, remained in lateral decumbency, in groups of 3 to 15 larvae. On day 2, the mouth was open, with conical teeth, and the digestive tube presented lumen and folded mucosa. The gaseous bladder and pectoral fins also were in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salminus brasiliensis; Larval ontogenic events; Larval swimming behavior. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100015 |
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| Sato,Yoshimi; Fenerich-Verani,Nelsy; Verani,José Roberto; Godinho,Hugo Pereira; Sampaio,Edson Vieira. |
| Pimelodus maculatus Lacepede, 1803 is an important fish of the Säo Francisco river basin, where it is economically significant in both professional and sports fisheries. The fish, maintained in captivity, was subjected to hypophysation with crude caip pituitary extract. Approximately 70% of the females treated spawned viable eggs. The eggs were opaque, demersal, yellow and free. Egg stripping was performed at 213 hour-degrees (duration = 8.3 h) after the second dose injection, at water temperature of 25-26ºC. Hatching occurred at 394 hour-degrees (duration = 16.3 h) after egg fertilization, at water temperature of 24-25ºC. Egg fertilization rate was 64.8%. The relationship between absolute fecundity (AF), initial fertility (IF) and final fertility (FF) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siluriformes; Pimelodus maculatus; Yellow-mandi catfish; Reproduction. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000400006 |
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| Sato,Yoshimi; Fenerich-Verani,Nelsy; Verani,José Roberto; Godinho,Hugo Pereira; Sampaio,Edson Vieira. |
| 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,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hypophysation; Rhinelepis aspera; Siluriformes; São Francisco River. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000300006 |
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