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| Carlos,Jaqueline; Matta,Sérgio Luis Pinto da. |
| The aim of this work was to study the testicular morphometry of captivity-bred adult bullfrogs. Fifteen young adult male were studied, in the rainy season and a lengthy photoperiod. The GSI was established at 0.15%. The nuclear diameter of germinative and Leydig cells, the nucleolus diameter of Sertoli cells and the area of cysts and tubules were determined and the mean number of ISPC, IISPC and SPT per cyst and the mean number of cysts per tubule was estimated. The nucleoplasmatic proportion of the nucleus of the Leydig cell was 76.22%, indicating less cytoplasmic activity. Eight generations of spermatogonia were found. The spermatogenesis efficiency in meiosis and in mitosis was 63 and 49%, respectively. The spermatogenesis of bullfrog fited in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spermatogenesis; Sertoli; Leydig; GSI. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600018 |
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| Al-Deghayem,Waleed A.; Al-Balawi,Hamoud F.; Kandeal,Saleh A.; Suliman,El Amin M.. |
| ABSTRACT The purpose of the current study was to examine the effects of different feeds/nutrients and temperature on the gonadal development of Clarias gariepinus. The gonadosomatic index (GSI) and blood parameters including red blood cell count (RBCs), white blood cell count (WBCs), hemoglobin (Hgb) level, hematocrit (HCT), platelets (PLT) and mean corpuscular volume (MCV) were investigated. Four types of fish feed of 36% protein content [D1(fish meal), D2 (soybean meal), D3 (peameal) and D4 (commercial tilapia feed)] and 3 different levels of temperature (T1(24℃), T2(28℃) and T3(32℃) were tried in this study for a duration of 4 months. The mean values were as follows: female GSI (14.68 ± 4.86), male GSI (0.70 ± 0.32), RBCs x 106(2.45± 0.64), WBCs x... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feed; Temperature; Clarias gariepinus; Hematology; GSI. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100404 |
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| Fontoura,Nelson Ferreira; Ceni,Gianfranco; Braun,Aloisio Sirangelo; Marques,Camilla da Silva. |
| ABSTRACT This contribution records the reproductive periods of ten dominant freshwater fish species from the Patos Lagoon and Guaíba Lake (Astyanax fasciatus, Cyphocharax voga, Hoplias malabaricus, Oligosarcus jenynsii, Oligosarcus robustus, Hoplosternum littorale, Loricariichthys anus, Parapimelodus nigribarbis, Trachelyopterus lucenai, Pachyurus bonariensis). Data were derived from monthly samples in Casamento Lake (northern Patos Lagoon; Nov. 2002 to Apr. 2004) and Guaíba Lake (Jun. 2005 to May 2006). The reproductive period was determined according to the monthly variation of the gonadosomatic index (GSI). Fish reproduction was identified during all months of the year. Oligosarcus jenynsii started reproduction in winter, but extended spawning to spring... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GSI; Maturation; Maturity Criteria; Reproductive Cycle. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200210 |
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| BARROSO,NATÁLIA DOS SANTOS; SOUZA,MANUELA OLIVEIRA DE; RODRIGUES,LAURA CAROLINA DA SILVA; PELACANI,CLAUDINÉIA REGINA. |
| ABSTRACT Physalis is represented by species that produce fruits with relevant potential for national and international marketing. The species are normally grown from seeds, so maturation studies are important to assist the point of harvest, as well as seeds with a high physiological potential, since the fruits remain enclosed within a cup throughout their development. Despite the nutraceutical importance of fruits and medicinal potential of many species of Physalisinformation on the physiological seeds quality are scarce. This study aimed to monitor the physical and physiological changes of maturation and the viability of seeds during fruit development stages. The fruits of P. ixocarpa were collected in 15, 25, 35, 45, 55 days after anthesis (DAA). Length,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sowing; Point of harvest; Seeds weight; GSI. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000300301 |
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