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| Registros recuperados: 2.277 | |
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| Keausei,Lígia; Gomes,Norma; Leyser,Karin L.. |
| Chrysemys dorbigni is a common diurnal turtle in the Taim Ecological Station. Though females may choose nesting sites in the same area they do it isolately, not in groups. Data on female nesting site selection, building of nest and egg laying are given. Under laboratory and field conditions development was followed from the egg stage to the emergence of hatchlings and growth of juveniles. One to 16 eggs are laid per clutch. Nesting activity is coincident with periods of higher temperatures in the field. Abiotic conditions and incidence of predation have been considered to estimate the success of clutches. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000100012 |
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| Coelho,Petrônio Alves; Torres,Maria Fernanda A.. |
| Proper site selection is fundamental in the success of any aquiculture enterprise. To identify suitable areas for freshwater prawn culture in Pernambuco, factors like elevation, relief, soil and climate were considered, in accordance with the species biology and pond construction. According to the established criteria, suitable, unsuitable and unfavorable areas, with some restrictions, were recognized. Suitable areas for freshwater prawn culture in Pernambuco are about 835 km², representing 0.85% of the total area of the State. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000300003 |
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| Lizaso,Nélida M.. |
| Ectoparasitic mites on Brazilian non-poisonous snakes, collected from March 1976 to December 1979, are herein reported. A systematic study of the Ixodorhynchidae, which include exclusively parasites of snakes is given, including all immature forms. Two new genera are described: Ophiogongylus gen.n. with two species: Ophiogongylus rotundus sp.n. and Ophiogongylus breviscutum sp.n. and Chironobius gen.n. with two species: Chironobius alvus sp.n. and Chironobius nordestinus sp.n. Ixobioides brachispinosus sp.n. and the male of Ixobioides fonsecae (Fain) are also described. Immature forms, hosts relations and geographical distribution are given for the species. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000300009 |
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| Redford,Kent H.. |
| Elaterid beetle larvae. Pyrearinus termitilluminans (sp.n., Costa, 1982.) live in termite mounds in central Brazil. Each larva produces light in the segment immediately behind its head. Larvae were observed to luminesce only during the first weeks of the rainy season, the same times as the ant and termite alate flights. Alates, apparently attracted to P. termitilluminans larval lights, serve as an important food source for the larvae. The prey-catching and food-storing behavior and the phenomenon of bioluminescence are apparently an evolutionary response by P. termitilluminans larvae to a short, rich pulse of food. Prey attraction as a probable cause for luminescence has been suggested only twice before. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000100004 |
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| Barreto,Aline Do Vale; Soares,Cileide Maria Acioli. |
| Studies on production of post-larvae of the prawn Macrobrachium amazonicum under controlled laboratory conditions were developed at the Departamento de Oceanografia da Universidade Federal de Pernambuco, from September 1980 to February 1982. Experiments were undertaken in aquaria and tanks where the salinity and density of the populations had been changed. The best production was obtained with salinity 14/00 with a density of 38 larvae per litre. The food provided for larvae was crushed fish and nauplii of Artemia salina. Out of 13 experiments a total of 20,000 post-larvae of Macrobrachium amazonicum were obtained. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000100008 |
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| Amorim,Dalton de Souza. |
| The problem of transposition without distortion of the phylogenetic information of cladograms and trees to a classification has elicited several suggestions from many authors. Both the subordination and sequencing methods have limitations which add up to those intrinsic of the Linnaean system. Conventions were made by Patterson & Rosen (1977) and Wiley (1979) to solve the problems of fossils in classification, of placing groups of uncertain position, of distinguishing tricotomies from sequencing, and of including the ancestral with recent and other fossil groups in the classification. The impossibility of naming inclusive taxa has been a major problem in the sequenced system. Herewith a method is proposed to refer to these groups without increasing... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000100001 |
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| Britski,Heraldo A.; Ortega,Hernan. |
| Trichogenes longipinnis, a new genus and species, is described from small litoranean rivers of Southeastern Brazil. The new genus was included in the Trichomycterinae, but when compared with two other genera of the subfamily (Trichomycterus and Hatcheria) revealed significant differences. Trichogenes can be characterized as follows: (1) opercle with two patches of spines; spines present on the interopercle also; (2) nasal barbel present; two barbels at the angle of the mouth; no mental barbels; (3) orbit with a free margin; (4) gill-membranes free from the isthmus; (5) first ray of the pectoral fin not pungent; (6) dorsal fin short (9 rays), nearer the caudal fin base than the tip of the snout; (7) origin of the ventral in front of the middle of the body;... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000300011 |
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| Coelho,Petrônio Alves; Ramos-'Porto,Marilena; Barreto,Aline do Vale; Costa,Vandete Elias da. |
| Prawn growth in intensive culture ponds depends upon the cultured species and internal (nutrition state) and external (pond condition) factors. To obtain growth taxa in aquaculture for the "canela" prawn (Macrobrachium amazonicum), experiments were carried out at Amapá and Pernambuco, Brazil. The initial prawn population of Amapá ponds carne from different places of the Amazon river, while those from Pernambuco from hatcheries of the Departamento de Oceanografia da Universidade Federal de Pernambuco. Physico-chemical and biological analyses of the water were made at the same time. The growth rate was estimated through collections of samples of about 10% of the initial population, with measures of the orbital length of each individual. Ponds' harvests were... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1982 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751982000100007 |
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| Registros recuperados: 2.277 | |
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