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| SANT'ANNA,BRUNO S.; BORGES,ROBERTO P.; HATTORI,GUSTAVO Y.; PINHEIRO,MARCELO A. A.. |
| The mangrove crab Ucides cordatus is one of the most exploited crustaceans in Brazil. The present study investigated the breeding season of this species and the period of the “andada” phenomenon, when the crabs are active outside their burrows and perform agonistic behaviors. Furthermore related them to environmental factors, in a mangrove on the coast of Brazil, with inferences about management of this crab. The crabs reproduced from October through February. The “andada” occurred from November through February, with typical characteristics in the first two months, during the full and new moon periods, and was influenced positively by the air and soil temperature, luminosity, and tidal amplitude, and negatively by salinity. Based on the results of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachyura; Crab; Mangrove; Management; Reproduction. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301411 |
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| SANCHES,EDUARDO G.; OLIVEIRA,IDILI R.; SERRALHEIRO,PEDRO C. DA SILVA; CERQUEIRA,VINICIUS R.. |
| This study aimed to develop a protocol of semen cryopreservation of the mutton snapper Lutjanus analis. The interaction between three extenders ( pH 6.1; 7.8 and 8.2) , two concentrations of dimethyl sulfoxide ( DMSO, 5 and 10%) and three cooling rates ( -90; -60 and -30°C.min−1) on the sperm motility rate and motility time were analyzed by a factorial experiment. A sample of 30 fishes ( 1,261 ± 449 g) collected in the nature was kept in floating net cages. The semen was frozen by using cryogenic straws, in nitrogen vapour and transferred, later, to liquid nitrogen. Fertilization test was accomplished to evaluate the viability of the cryopreserved sperm. The highest sperm motility rate and motility time ( P < 0.05) was achieved by combining extender C (... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryoprotector; Extender; Lutjanus analis; Reproduction; Sperm. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301083 |
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| CHAVES,MARCIO F.; TENÓRIO,FERNANDA C.M.A.; SANTOS,IGOR L.V.L.; J.C.L. NETO,CLOVIS; TEXEIRA,VALERIA W.; MOURA,GERALDO J.B.; TEXEIRA,ÁLVARO A.C.. |
| ABSTRACT The objective of this study was to assess variations of the condition factor (K1) in relation to the gonadosomatic- RGS and energy reserves (hepatosomatic - RWL and liposomatic - RFB relations) of Leptodactylus macrosternum and their relationship to climate variation in the Northeast of Brazil, Caatinga area, state of Paraiba. The animals were captured fortnightly through active collecting, between January and December 2013. Significant differences were observed in the monthly variations of K1, RGS and RFB indices in male and female L. macrosternum over the months of collection. In males, K1 showed no significant relationship with the other variables. In females, RGS values only show notable correlations with RWF and K1 values. K1 values showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anurans; Fatty bodies; Northeast; Reproduction; Seasonality. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401591 |
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| Panizzi,Antônio R.; Mourão,Ana P.M.. |
| Laboratory studies were conducted on mating, ovipositional rhythm, and fecundity of the southern green stink bug, Nezara viridula (L.) fed on immature fruits of privet, Ligustrum lucidum Thunb. and soybean, Glycine max (L.) Merrill. A greater number of pairs were observed mating on privet (27 to 37 %) than on soybean (22 to 23 %). The preoviposition period was significantly shorter when females fed on privet (15.5 days) than when they fed on soybean (23.9 days). The intervals of time between the first four ovipositions, and between the 1st and the 4th oviposition were shorter on privet than on soybean (range of 1.9 to 3.3 days less on the former food). Greater percentage of females N. viridula oviposited and showed greater fecundity on privet than on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Hemiptera; Reproduction; Copulation; Fecundity; Food. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000100003 |
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| Dantas,A.; Siqueira,E.R.; Fernandes,S.; Oba,E.; Castilho,A.M.; Meirelles,P.R.L.; Sartori,M.M.P.; Santos,P.T.R.. |
| The objective of the study was to evaluate body growth and age at onset of puberty on lambs fed two specific diets for low and high growth rates. A herd of 20 Brazilian Bergamasca lambs was divided in two groups (n= 10) and kept confined throughout the experimental period, two animals of the same treatment/pen. Two phases were established: Phase 1, from 90 days of age until the onset of puberty; and Phase 2, from puberty onset up to 1 year old. For Phase 1, two distinct diets were formulated, being: Treatment A, which was formulated to obtain an average daily gain of approximately 150g; and Treatment B, for an average daily gain of about 250g. In Phase 2, a balanced, equal diet was provided to both groups. Every 14 days, the animals were weighed and given... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrition; Performance; Reproduction; Growth hormone; Sheep. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100022 |
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| Andrade,E.S.; Felizardo,V.O.; Murgas,L.D.S.; Drumond,M.M.; Zangerônimo,M.G.; Costa,S.F.. |
| This study evaluated the reproductive dynamics and gonadal morphology of piaparas (Leporinus obtusidens) captured downstream from the Funil Hydroelectric Power Station. The 107 piaparas evaluated were captured monthly from Sep 2006 to Aug 2007. The data were stratified among the seasons to evaluate gonad maturation and the reproductive period was determined by assessing the gonadosomatic index, hepatosomatic index, abdominal fat index (AFI), weight:length ratio, condition factor and sexual proportion. The reproductive period lasted from winter to summer (Jul-Mar) in females and from spring to autumn (Sept-Jun) in males. AFI was high during and after the reproductive period in females and only during the reproductive period in males. The highest HIS values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Reproduction; Piracema; Histology; Gonad. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000500021 |
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| Rezende,R.S.; Eurides,D.; Barbosa,C.P.; Lacerda,M.S.; Sampaio,R.L.; Gomes,A.L.. |
| ABSTRACT The aim of this study was to evaluate the effectiveness of a GnRH synthetic analog, as an estrous inducer in female dogs when administered during the anestrous phase, and to evaluate the pregnancy rate achieved through natural copulation. For this purpose, ten female dogs of different breeds were used. The subjects received buserelin by intramuscular injections at a dose of 2,1mcg when female dogs weighed up to 10kg (Group 1) and of 4,2mcg when the dogs weighed above 10kg (Group 2). Of the ten subjects, only three presented estrus after a single injection of buserelin: two dogs from Group 1 and one dog from Group 2 on average 7±1.29 days. The remaining seven dogs were given a second dose of buserelin, equal to the first administration. Of these,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dogs; Reproduction; Hormone; Cytology; Cycle. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000300656 |
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| Pandolfi,Matías; Cánepa,Maximiliano M.; Meijide,Fernando J.; Alonso,Felipe; Rey Vázquez,Graciela; Maggese,M. Cristina; Vissio,Paula G.. |
| Many characteristics of the South American teleost fish Cichlasoma dimerus (body size, easy breeding, undemanding maintenance) make it amenable to laboratory studies. In the last years, many of the fundamental aspects of its reproductive and developmental biology have been addressed in our laboratory. Rather recently, the immunohistochemical localization of pituitary hormones involved in reproduction and in background color adaptation has been described in both adult and developing individuals, and the role of FSH in ovarian differentiation has been established. These findings have been correlated with mapping of some of their brain-derived controlling hormones. The latter include brain-derived gonadotropins which were shown to be active in vitro in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproduction; Early development; Neuroendocrinology; Brain; Pituitary; Teleosts. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000100001 |
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| ZANUNCIO,TERESINHA V; ZANUNCIO,JOSÉ C; SERRÃO,JOSÉ E; MEDEIROS,RÔMULO S; PINON,TOBÍAS BM; SEDIYAMA,CAMILLA AZ. |
| The stinkbug Supputius cincticeps (Stål) (Heteroptera: Pentatomidae) can be found in agricultural and forest ecosystems feeding primarily on larvae of Coleoptera and Lepidoptera, where it can be exposed to insecticide applications. This study therefore aimed to evaluate the reproductive potential of'S. cincticeps after exposition to sublethal doses of permethrin (5.74 x 10-3, 5.74 x 10-2, 5.74 x 10-1, 5.74 and 57.44 ppb) through the use of a fertility life table. The development cycle of this predator was determined in order to calculate its net reproductive rate (R0), the infinitesimal (r m) and finite (λ) rates of increase in addition to mean generation time (T). The net reproductive (18.31), infinitesimal (r m) (0.050) and finite (λ)... |
| Tipo: Journal article |
Palavras-chave: Asopinae; Biological control; Pyrethroids; Reproduction. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100005 |
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