Consulta: subjectFacets:"Life history"
Registros recuperados: 45
Data/hora: 01/06/2024 00:58:27

Bioecología del barrenador grande de la semilla de aguacate Heilipus lauri Boheman (Coleoptera: Curculionidae) en la región central de México
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Castañeda Vildózola, Alvaro.
A pesar de que Heilipus lauri Boheman (Coleoptera: Curculionidae) es una plaga que  puede repercutir negativamente en la comercialización exterior del aguacate  cultivado en México, se carece de información científica básica y aplicada sobre este  insecto. La existente es muy superficial e imprecisa que no puede sustentar aspectos  relacionados con su morfología, biología y distribución en nuestro país.  Considerando lo anterior se propone generar información básica que pueda ser  utilizada como referencia dentro de programas de manejo y/o erradicación dentro de  áreas que reportan la presencia de este insecto. La presente investigación  comprendió la descripción morfológica, aspectos biológicos como instares larvarios,  fecundidad, fertilidad y...
Tipo: Tesis
Palavras-chave: Persea americana; Picudos; Ciclo de vida; Fecundidad; Distribución; Doctorado; Entomología y Acarología; Persea americana; Weevils; Life history; Fecundity; Distribution.
Ano: 2008
URL: http://hdl.handle.net/10521/1406

Scaling of Natal Dispersal Distances in Terrestrial Birds and Mammals
Provedor de dados: Ecology and Society
Autores: Sutherland, Glenn D; University of British Columbia; gsland@interchg.ubc.ca; Harestad, Alton S; Simon Fraser University; harestad@sfu.ca; Price, Karen; Simon Fraser University; kprice@futurenet.ca; Lertzman, Ken; Simon Fraser University; lertzman@sfu.ca.
Natal dispersal is a process that is critical in the spatial dynamics of populations, including population spread, recolonization, and gene flow. It is a central focus of conservation issues for many vertebrate species. Using data for 77 bird and 68 mammal species, we tested whether median and maximum natal dispersal distances were correlated with body mass, diet type, social system, taxonomic family, and migratory status. Body mass and diet type were found to predict both median and maximum natal dispersal distances in mammals: large species dispersed farther than small ones, and carnivorous species dispersed farther than herbivores and omnivores. Similar relationships occurred for carnivorous bird species, but not for herbivorous or omnivorous ones....
Tipo: Peer-Reviewed Reports
Palavras-chave: Allometric scaling; Birds; Body mass; Comparative analysis; Connectedness; Diet type; Habitat alterations; Life history; Mammals; Movements; Natal dispersal distances; Probability density function.
Ano: 2000

Clutch size in the small-sized lizard Eurolophosaurus nanuzae (Tropiduridae): does it vary along the geographic distribution of the species?
Provedor de dados: Iheringia Série Zoologia
Autores: Galdino,Conrado A. B; Sluys,Monique Van.
We studied life history traits of females of the lizard Eurolophosaurus nanuzae (Rodrigues, 1981), an endemic species of rock outcrop habitats in southeastern Brazil. During October 2002 and 2003 we sampled three populations in sites that encompass the meridional portion of the geographic range of the species. Clutch size varied from one to three eggs, with most females carrying two eggs. Clutch size did not vary among populations, but was correlated to female body size. Only larger females produced clutches of three eggs. Females of the small-sized E. nanuzae produce eggs as large as those of medium-sized tropidurids, thus investing a considerable amount of energy to produce clutches resulting in high values of relative clutch mass.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Life history; Interpopulational variation; Squamata.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000100008

Can stochastic variations in recruitment induce long-term fluctuations in the carrying capacity?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc.
Long-term fluctuations in fish abundance are generally attributed to low frequency processes, such as human exploitation and/or environmental and climatic changes. Based on recent studies and simple simulations, this manuscript shows how long-term fluctuations in the carrying capacity and/or spawning stock biomass of a long-live species, such as the Atlantic bluefin tuna, may simply arise from stochastic variations in the recruitment. The implications of such a feature are discussed and compared among different Atlantic tunas and tuna-like species.
Tipo: Text
Palavras-chave: Long-term fluctuations; Recruitment; Atlantic tunas; Stochastic variations; Life history; Lifespan; Spawning stock biomass.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00194/30499/28909.pdf

Integrative taxonomy revisits the ontogeny and trophic niches of   Rimicaris   vent shrimps
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Methou, Pierre; Michel, Loic; Segonzac, Michel; Cambon-bonavita, Marie-anne; Pradillon, Florence.
Among hydrothermal vent species, Rimicaris exoculata is one of the most emblematic, hosting abundant and diverse ectosymbioses that provide most of its nutrition. Rimicaris exoculata co-occurs in dense aggregates with the much less abundant Rimicaris chacei in many Mid-Atlantic Ridge vent fields. This second shrimp also houses ectosymbiotic microorganisms but has a mixotrophic diet. Recent observations have suggested potential misidentifications between these species at their juvenile stages, which could have led to misinterpretations of their early-life ecology. Here, we confirm erroneous identification of the earliest stages and propose a new set of morphological characters unambiguously identifying juveniles of each species. On the basis of this...
Tipo: Text
Palavras-chave: Hydrothermal vents; Stable isotopes; Taxonomy; Crustaceans; Life history; Trophic shift.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75227/75368.pdf

Variation in the link between oxygen consumption and ATP production, and its relevance for animal performance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Salin, Karine; Auer, Sonya K.; Rey, Benjamin; Selman, Colin; Metcalfe, Neil B.
It is often assumed that an animal's metabolic rate can be estimated through measuring the whole-organism oxygen consumption rate. However, oxygen consumption alone is unlikely to be a sufficient marker of energy metabolism in many situations. This is due to the inherent variability in the link between oxidation and phosphorylation; that is, the amount of adenosine triphosphate (ATP) generated per molecule of oxygen consumed by mitochondria (P/O ratio). In this article, we describe how the P/O ratio can vary within and among individuals, and in response to a number of environmental parameters, including diet and temperature. As the P/O ratio affects the efficiency of cellular energy production, its variability may have significant consequences for animal...
Tipo: Text
Palavras-chave: Mitochondrial coupling efficiency; Life history; Oxidative stress; Reactive oxygen species; Trade-off; Uncoupling.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00414/52509/53322.pdf

Maternal oxidative stress and reproduction: testing the constraint, cost and shielding hypotheses in a wild mammal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Viblanc, Vincent A.; Schull, Quentin; Roth, Jeffrey D.; Rabdeau, Juliette; Saraux, Claire; Uhlrich, Pierre; Criscuolo, François; Dobson, F. Stephen.
1.Oxidative stress has been proposed as a central causal mechanism underlying the life history trade-off between current and future reproduction and survival in wild animals. 2.Whereas mixed evidence suggests that maternal oxidative stress may act both as a constraint and a cost to reproduction, some studies have reported a lack of association between reproduction and maternal oxidative stress. 3.The oxidative shielding hypothesis offers an alternative explanation, suggesting that mothers may pre-emptively mitigate the oxidative costs of reproduction by increasing antioxidant defences prior to reproduction. 4.We tested the oxidative constraint, cost, and shielding hypotheses using a longitudinal field study of oxidative stress levels in a species that...
Tipo: Text
Palavras-chave: Antioxidant; Body condition; Cost of reproduction; Life history; Mammal; Mitochondria; Trade-off.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52679/53542.pdf

Population structure and spread of the Polychaete Diopatra biscayensis along the French Atlantic Coast: Human-assisted transport by-passes larval dispersal
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Woodin, Sarah Ann; Wethey, David S.; Dubois, Stanislas F.
Intertidal populations of the ecosystem engineering polychaete, Diopatra biscayensis, were analyzed on the French Atlantic coast for three years with individual size estimated from tube-cap aperture. All but the northernmost population along the Bay of Biscay have yearly recruitment. Individuals live 3-5 years and are likely reproductive as one year olds. Simulations indicate dispersal distances are &lt; 50 km; yet, populations also exist within the Normano-Breton Gulf in the western English Channel, more than 450 km from the northernmost Bay of Biscay population at La Trinité-sur-Mer. Three of the four populations in the Normano-Breton Gulf have no young of the year, but are near to active mussel culture where mussel seed is transported on ropes from...
Tipo: Text
Palavras-chave: Diopatra biscayensis; Ecosystem engineer; Larval dispersal; Aquaculture; Life history; Human-assisted-transport; Connectivity.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00190/30128/28590.pdf

Does the concept of spawning per recruit make sense?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rochet, Marie-joelle.
Density dependence means that exploited fish populations exhibit earlier maturity, a faster growth rate, increased fecundity and reduced egg size. Here, the consequences of these effects on population dynamics, the estimation of spawning biomass per recruit and associated biological reference points are examined by a simulation model. The model is a self-regenerating model in which the population parameters (age at maturity, growth, fecundity, egg size) vary according to three classes of population abundance. Early life stages are characterized by a size-dependent growth and mortality model. It is concluded that spawning per recruit is an ambiguous concept because, if density dependence occurs in the adult population, the spawning biomass of a cohort is...
Tipo: Text
Palavras-chave: Teleost fishes; Population dynamics; Life history; Density dependence; Biological reference points.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-485.pdf

Biologie et pêche traditionnelle des crevettes pénéides dans l'embouchure d'un fleuve en milieur semi-aride (sud-ouest de Madagascar)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laroche, Jean; Benoely,; Siaviri, A.
Traditional fishing using beach seines was studied over a period of one year at the mouth of the Onilahy river. The catches/efforts were recorded on a daily basis, biological sampling and the measurement of hydrological parameters being carried out twice a month. The moderate variations of salinity and temperature (14 &lt; salinity &lt; 35; 25 degrees C &lt; temperature &lt; 30 degrees C) which were observed in the estuary can be explained by the semiarid climate of the area. Four species of penaeid shrimps are to be found on the Onilahy: Metapenaeus monoceros, Panaeus indicus, Penaeus monodon and Penaeus japonicus, which were mainly caught at the subadult/adult stage with a Carapace length between 10 and 50 mm. The presence of these important sizes at the...
Tipo: Text
Palavras-chave: Pêche; Estuaire; Dynamique population; Croissance; Taille corporelle; Cycle évolutif; Zone semi aride; Madagascar; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Metapenaeus monoceros; Rivière Onilahy; Afrique; Milieu saumâtre; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata; Fishing; Estuaries; Population dynamics; Growth; Body size; Life history; Semi arid zone; Malagasy Republic; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Africa; Brackish water environment; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20828/42822.pdf

Comparison in waterborne Cu, Ni and Pb bioaccumulation kinetics between different gammarid species and populations: Natural variability and influence of metal exposure history
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Urien, N.; Farfarana, A.; Uher, E.; Fechner, Lise; Chaumot, A.; Geffard, O.; Lebrun, J. D.
Kinetic parameters (uptake from solution and elimination rate constants) of Cu, Ni and Pb bioaccumulation were determined from two Gammarus pulex and three Gammarus fossrum wild populations collected from reference sites throughout France in order to assess the inter-species and the natural inter-population variability of metal bioaccumulation kinetics in that sentinel organism. For that, each population was independently exposed for seven days to either 2.5 mu g L-1 Cu (39.3 nM), 40 mu g L-1 Ni (681 nM) or 10 mu g L-1 Pb (48.3 nM) in laboratory controlled conditions, and then placed in unexposed microcosms for a 7-day depuration period. In the same way, the possible influence of metal exposure history on subsequent metal bioaccumulation kinetics was...
Tipo: Text
Palavras-chave: Amphipods; Trace metals; Life history; Kinetic parameters; Inter-population variability.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00417/52840/54270.pdf

Functional reorganization of marine fish nurseries under climate warming
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mclean, Matthew J.; Mouillot, David; Goascoz, Nicolas; Schlaich, Ivan; Auber, Arnaud.
While climate change is rapidly impacting marine species and ecosystems worldwide, the effects of climate warming on coastal fish nurseries have received little attention despite nurseries’ fundamental roles in recruitment and population replenishment. Here, we used a 26‐year time series (1987–2012) of fish monitoring in the Bay of Somme, a nursery in the Eastern English Channel (EEC), to examine the impacts of environmental and human drivers on the spatial and temporal dynamics of fish functional structure during a warming phase of the Atlantic Multidecadal Oscillation (AMO). We found that the nursery was initially dominated by fishes with r‐selected life‐history traits such as low trophic level, low age and size at maturity, and small offspring, which...
Tipo: Text
Palavras-chave: Atlantic Multidecadal Oscillation; Climate change; Ecosystem function; English Channel; Fisheries; Functional traits; Life history; Recruitment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00471/58276/60818.pdf

Social parasitism in mammals with particular reference to neotropical primates
Provedor de dados: Mastozoología Neotropical
Autores: Jones,Clara B.
Organisms often respond in ways that appear to benefit others rather than themselves. This phenomenon is consistent with the views of Darwin (1859) and Dawkins (1999) that individuals may exploit the responses of others. This phenomenon, "social parasitism", has been extensively investigated in social insects, particularly, ants. Other empirical studies have demonstrated social parasitism in fish, birds, and mammals. This paper reviews several possible examples of mammalian social parasitism, with an emphasis upon intraspecific social parasitism (ISP) in Neotropical primates. Social parasitism is discussed as a life history feature of long-lived, social organisms such as many primates, including humans. A simple mathematical model, applied to social...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Social parasitism; Phenotypic manipulation; Neotropical primates; Life history; Social evolution.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832005000100003

Natural history and distribution of Agalychnis craspedopus (Funkhouser, 1957) (Amphibia: Anura: Hylidae)
Provedor de dados: Naturalis Digital Academic Repository
Autores: Hoogmoed, M.S.; Cadle, J.E.
Aspects of reproductive behaviour, calls, clutch sizes, and larval morphology are described for Agalychnis craspedopus (Funkhouser, 1957). New distributional records extend the range of this species to southern Amazonian Peru. In most respects reproductive behaviour of A. craspedopus is similar to that of other phyllomedusine frogs. In southern Peru clutches were suspended above water-filled hollow cavities in logs, but in Ecuador tadpoles were found in a pool on the ground with no directlyoverhanging vegetation. Agalychnis craspedopus lays small clutches (mean = 17 eggs) with large eggs. Breeding possibly takes place throughout some years in southern Peru, but this undoubtedly varies depending on rainfall. Some aspects of reproductive biology, and tadpole...
Tipo: Article / Letter to the editor
Palavras-chave: Amphibia; Anura; Hylidae; Phyllomedusine; Agalychnis craspedopus; Life history; Distribution; Amazonian lowlands; Neotropics; 42.82.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/318246

Immature stages of Adelpha malea goyama Schaus (Lepidoptera: Nymphalidae, Limenitidinae)
Provedor de dados: Neotropical Entomology
Autores: Freitas,André V.L.
The immature stages of Adelpha malea goyama Schaus are described from the Estação Ecológica do Caiuá, Paraná State, Brazil. The species uses the native liana Arrabidaea mutabilis Bur. &amp;amp; K. Schum. (Bignoniaceae) as larval hostplant in the study site. Isolated eggs are laid on leaf tips, and are similar in shape to those described for other species of Adelpha Hübner. Larvae pass through five stadia during 21 days, and first to third instars construct frass chains. Later instars rest on the upper leaf surface, and their body is covered by rigid branched scoli. The general profile of the pupa is elongated, with short head horns projecting laterally and with segment A2 projecting and curved anteriorly. Comparisons with closely related species of Adelpha...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arrabidaea; Bignoniaceae; Butterfly; Life history; Atlantic Forest.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000500008

Immature stages of the butterfly Magneuptychia libye (L.) (Lepidoptera: Nymphalidae, Satyrinae)
Provedor de dados: Neotropical Entomology
Autores: Kaminski,Lucas A.; Freitas,André V.L.
The immature stages of the butterfly Magneuptychia libye (L.) are described, and their morphology is compared with other Neotropical Satyrinae.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euptychiina; Poaceae; Life history.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000200010

A new species of Moneuptychia Forster (Lepidoptera: Satyrinae, Euptychiina) from the highlands of Southeastern Brazil
Provedor de dados: Neotropical Entomology
Autores: Freitas,André V.L.
This paper describes a new species of Moneuptychia Forster from the summits of the Mantiqueira and Espinhaço mountain ranges in southeastern Brazil, details the morphology of adults and immatures of this species, and discusses the definition of the genus Moneuptychia.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Butterfly; Life history; Paramos.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000600014

A new genus and species of Euptychiina (Lepidoptera: Nymphalidae: Satyrinae) from southern Brazil
Provedor de dados: Neotropical Entomology
Autores: Freitas,AVL; Mielke,OHH; Moser,A; Silva-Brandão,KL; Iserhard,CA.
This paper describes a new genus and a new species of Euptychiina from open grassland habitats (campos de cima da serra) in southern Brazil. The systematic position of this new taxon is discussed based on morphological and molecular data, and it is considered sister to Taydebis Freitas. Since the campos vegetation is considered endangered due to anthropogenic activities, this butterfly species deserves attention and should be included in future conservation plans for this biome.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Butterfly; Open grassland habitat; Life history.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000200012

Growth of the Silverside Atherinella brasiliensis in Tramandaí Estuary, Southern Brazil (Actinopterygii: Atherinopsidae)
Provedor de dados: Neotropical Ichthyology
Autores: Bervian,Giovana; Fontoura,Nelson F.
The growth of Atherinella brasiliensis (Quoy &amp;amp; Gaimard, 1824) was studied through monthly samples taken at Tramandaí Lagoon, Imbé County, Rio Grande do Sul, Brazil. Animals were captured using a beach seine net. Length-weight relationships and age- growth curves for males and females were adjusted. The growth parameters of the von Bertalanffy growth formulae are Linf=16.0 and k=0.883 for males and Linf=17.0 and k=0.825 for females. First reproduction occurred one year after recruitment. Once reaching maturity, adults of A. brasiliensis reproduced once more in the next spring with two-year-olds and disappeared soon after from size frequency distributions. A few captured animals showed a size compatible with an age of three years.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atherinidae; Longevity; Life cycle; Life history.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000400008

Breeding, growth and exploitation of Brachyplatystoma rousseauxii Castelnau, 1855 in the Caqueta River, Colombia
Provedor de dados: Neotropical Ichthyology
Autores: Córdoba,Edwin Agudelo; León,Ángela Viviana Joven; Bonilla-Castillo,César Augusto; Petrere Junior,Miguel; Peláez,Marlón; Duponchelle,Fabrice.
The main life history traits of the large Amazonian migratory catfish Brachyplatystoma rousseauxii were determined in the Caqueta River, Colombia. The breeding season occurred during the rising and falling water periods. The size at first sexual maturity was significantly larger for females (88.5 cm Ls) than males (81.7 cm). Both males and females reproduce for the first time between their third and fourth year. The growth characteristics were estimated using length frequency analyses. Females grew systematically larger than males, the difference being about 9% after the first year and increasing to 12% for ten years old individuals. Mortality estimates, calculated from different models, some taking into account the effect of body size, ranged from 0.32 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Dorado; Life history; Migratory catfish; Pimelodidae.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300637

Seasonal and spatial distributions in relation to reproduction of blowflies (Diptera, Calliphoridae) in Hokkaido, Japan
Provedor de dados: Obihiro University of Agriculture and Veterinary Medicine Academic Repository (OAK)
Autores: IWASA, Mitsuhiro; MATSUSHIMA, Kana; INOUE, Ayako; 岩佐, 光啓.
Seasonal and spatial distributions of blowflies in relation to reproduction were investigated by baited traps in eight sites from lowland to high mountainous areas in Hokkaido, Japan. A total of 6,571 blowflies consisting of seven species in three genera was collected. The most predominant species was Calliphora vomitoria (Linnaeus) (5,946 flies, 90.5%), followed by C. nigribarbis Vollenhoven (537 flies, 8.2%). The remaining five species (Triceratopyga calliphoroides Rohdendorf, C. vicina Robineau-Desvoidy, C. loewi Enderlein, C. subalpina (Ringdahl), and Aldrichina grahami (Aldrich) were few in numbers. Calliphora vomitoria had the highest peak in autumn (October) in lowland to upland areas (70 m, 400 m, and 500 m), and it was also abundant from July to...
Palavras-chave: Blowflies; Distribution; Emergence; Hokkaido; Life history; Reproduction.
Ano: 2012
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3843

Distribución, abundancia y estacionalidad de Liriope tetraphylla (Hidromedusa, Trachymedusae) en el Océano Atlántico Sudoccidental y su rol ecológico en el estuario del Río de la Plata
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Gaitán, E.N.
In zones of high productivity and/or in shallow waters (frontal or upwellings areas, bays and estuaries) the hydromedusae can reach exceptional abundances, denominated 'blooms'. Occasionally, these exceptional abundances are originated from some few individuals that constitute a 'seed population', which is retained in particular places while the environmental conditions are adverse. Liriope tetraphylla is a holoplanktonic and oceanic hydromedusae that often is found forming dense aggregations, which are developed mainly in the Buenos Aires coast during the summer in Argentinian waters (SW Atlantic). The temporal-space distribution and the abundance of L. Tetraphylla in the Subantarctic region were analyzed, with 1458 samples embracing the Argentinian and...
Tipo: Theses and Dissertations
Palavras-chave: Ecological aggregations; Geographical distribution; Abundance; Seasonal variations; Life history.
Ano: 2004
URL: http://hdl.handle.net/1834/5029

Estrategia reproductiva de la saraca, Brazilian menhaden, Brevoortia aurea (Pisces: Clupeidae), en el estuario del Río de la Plata
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Acha, E.M.
The Brazilian menhaden, Brevoortia aurea, is the only species of genus Brevoortia in South American Atlantic waters, being abundant in the Rio de la Plata estuary.  The temporal and spatial reproductive pattern of this menhaden was analyzed in relation to the major hydrographic features of the region, and the reproductive biology was studied by using histological analysis of ovaries. B.aurea is a multiple spawner with indeterminate annual fecundity. Daily spawning activity was mostly in the afternoon (15:00 - 16:00),based on the incidence of females with both hydrated oocytes and postovulatory follicles. Spawning frequency, determined using the percentage of females with postovulatory follicles, was about 12.  during November.  At this frequency, each...
Tipo: Theses and Dissertations
Palavras-chave: Reproduction; Fecundity; Ovaries; Fish larvae; Eggs; Life history; Brackishwater fish; Spawning grounds; Spawning seasons; Estuaries; Estuaries; Ovaries; Eggs; Life history; Spawning grounds; Reproduction; Fecundity; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_12170; Http://aims.fao.org/aos/agrovoc/c_7277; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1999
URL: http://hdl.handle.net/1834/1458

Moluscos bivalvos y gasteropodos
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Lasta, M.L.; Ciocco, N.F.; Bremec, C.; Roux, A.
The main life history characteristics, ecology and fishing interest of bivalve and gastropod species from the Argentine Sea are described. Exploited bivalve species are: mussel Mytilus edulis platensis, cholga Aulacomya ater, tehuelche scallop Aequipecten tehuelchus, Patagonian scallop Zygochlamys patagonica. Bivalve species irregularly exploited are: yellow clam Mesodesma mactroides, purple clam Amiantis purpurata, hard shell clam Ameghinomya antiqua and wedge shell Donax hanleyanus. It is also presented information on species of potential interest: clams Eurhomalea exhalbida and Pitar rostratus, half naked pen shell Atrina seminuda, 'geoduck' Panopea abbreviata, razor shells Solen tehuelchus, Ensis macha, Tagelus plebeius, and flat oyster Ostrea...
Tipo: Book Section
Palavras-chave: Marine molluscs; Potential resources; Life history; Ecology; Geographical distribution; Literature reviews; Life history; Ecology; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_12170; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 1998
URL: http://hdl.handle.net/1834/2582

Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo?
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Schiariti, A.
In this Thesis we presented the first steps in the study of the life history and population dynamics of Lychnorhiza lucerna as well as the possibilities of development of its fishery in Argentina. L. lucerna presented a metagenetic life cycle characteristic of most scyphozoans. Polyps reproduced asexually by the production of podocysts and polidisk strobilation. The combination of both types of asexual reproduction resulted in a high strobilation rates indicating that the abundance of medusae would strongly depend on polyps abundance and reproduction. The absence of ephyrae in the Río de la Plata estuary suggest that L. lucerna doest not complete its life cycle locally but medusae would be produced by polyps located northwards along the Uruguayan or...
Tipo: Theses and Dissertations
Palavras-chave: Life cycle; Life history; Population dynamics; Reproductive cycle; Biomass; Estuarine fisheries; Life history; Biomass; Estuarine fisheries; Life cycle; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_12170; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2674; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2008
URL: http://hdl.handle.net/1834/3109

Early Iron Working People's Adaptation to the Nearshore and Offshore Island Environment
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Chami, F.
Tanzanian researchers of the on-going SAREC/Sida-sponsored project on Human Responses and Contribution to Environmental Change (HRAC) have focused their research on a narrow strip of the central coast of Tanzania. The area under investigation is specifically between Kisiju to the north and the Rufiji Delta to the south. Survey work was also extended to the off-shore islands including Kwale, Koma and Mafia. The preliminary intention was to look for sites that could provide light to the whole question of environmental change and its human contribution.
Tipo: Journal Contribution
Palavras-chave: Environments; Life history.
Ano: 1998
URL: http://hdl.handle.net/1834/278

Microestructura de los otolitos Sagittae de larvas y juveniles de Merluccius hubbsi (Marini 1933): análisis comparativo entre las áreas de distribución bonaerense y norpatagónica
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Buratti, C.C.
The life history of numerous aquatic organisms involves a pelagic larval stage, followed by a shift to a demersal or benthic existence (settlement) in the juvenile and adult stage. This transition and ecological, physiological and morphological changes frequently remain recorded like checks or marks in fish otoliths. As a contribution to the knowledge of hake (Merluccius hubbsi)life history, sagittae otoliths of larvae and juveniles with total length between 19 and 190 mm inhabiting North Patagonian and Bonaerensis waters in the Argentine sea (SW Atlantic)were analyzed. Using an image analysis system, otoliths microstructure was described and comparisons between left and right otoliths and between study areas in the following variables were realized:...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Juveniles; Otolith reading; Otoliths; Larval settlement; Life history; Otoliths; Life history; Fish larvae; Juveniles.
Ano: 2003
URL: http://hdl.handle.net/1834/3108

Critique of some practices in life-history studies, with special references to harpacticoid copepods
Provedor de dados: Open Marine Archive
Autores: Bergmans, M.
Published studies on the demography and reproductive strategies of harpacticoid copepods are examined critically. At the technical level, the popular approximation &lt;i&gt;r&lt;/i&gt; = ln R&lt;sub&gt;0&lt;/sub&gt;/T&lt;sub&gt;c&lt;/sub&gt; is shown to be inappropriate as an estimate of the intrinsic rate of increase of harpacticoids. It leads to a systematic underestimation, by 8-29%, for life histories typical of fast-breeding species. Various &lt;i&gt;ad hoc&lt;/i&gt; variants of &lt;i&gt;r&lt;/i&gt; and &lt;i&gt;R&lt;sub&gt;0&lt;/sub&gt;&lt;/i&gt; calculations occurring in the literature are also criticized. At the conceptual level, a more discriminating approach to life-history characteristics is necessary; this applies both to the assessment of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Life history; Copepoda [copepods].
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3311

Studies of the life-history and energetics of marine and brackish-water nematodes: 2. Production, respiration and food uptake by &lt;i&gt;Monhystera disjuncta&lt;/i&gt;
Provedor de dados: Open Marine Archive
Autores: Herman, P.M.J.; Vranken, G.
An energy budget was constructed for the marine nematode &lt;i&gt;Monhystera disjuncta&lt;/i&gt;. Respiration was measured with a modified Cartesian diver technique, in which the nematodes were kept in agar inside the diver 'head'. The relationship between respiration and body weight was: R=1.53 W&lt;sup&gt;0.75&lt;/sup&gt;. Body growth was exponential during the juvenile phase, with a growth rate equal to 0.61 d&lt;sup&gt;-1&lt;/sup&gt;. After maturation the growth rate fell to 0,17 d&lt;sup&gt;-1&lt;/sup&gt;. Food uptake was measured in experiments with radiolabeled bacteria. In one series of experiments the accumulation of radiolabel in the nematodes was followed. In a second series the decrease in labeling was followed when pre-labeled nematodes fed on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergetics; Brackishwater environment; Energy budget; Energy flow; Feeding; Life history; Meiobenthos; Respiration; Monhystera disjuncta; Nematoda [Nematodes].
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3146

Kennen Sie die Lebensgeschichte von &lt;i&gt;Artemia salina&lt;/i&gt;?
Provedor de dados: Open Marine Archive
Autores: Sorgeloos, P.; Persoone, G.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Life history; Artemia salina.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3437

Studies of the life-history and energetics of marine and brackish-water nematodes: 1. Demography of &lt;i&gt;Monhystera disjuncta&lt;/i&gt; at different temperature and feeding conditions
Provedor de dados: Open Marine Archive
Autores: Vranken, G.; Herman, P.M.J.; Heip, C.H.R.
Aspects of the demography of &lt;i&gt;Monhystera disjuncta&lt;/i&gt; were investigated at different feeding conditions (monoxenic cultures with different bacterial strains, and different densities in the feeding suspension with one strain). Embryonic development time, minimum generation time, egg deposition rate and adult longevity depend on temperature, quality and quantity of food offered. Body mass at maturity is an allometric function of food density. It is shown that a previously inferred selectivity in food uptake is an artifact of culture conditions. pH buffering and addition of sterols permit culture of the species on a wide variety of bacterial strains. &lt;i&gt;M. disjuncta&lt;/i&gt; is less well adapted to take advantage of high food density...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergetics; Brackishwater environment; Cultured organisms; Feeding; Life history; Marine environment; Meiobenthos; Temperature effects; Water temperature; Monhystera disjuncta.
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3159

The multifunctionality of agriculture and risk management as seen by Hungarian farmers involved in diversified farming
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Petrics,   Hajnalka; Feher,   Alajos.
Studying the multifunctional nature of agriculture requires a multi-level, multi-dimensional and multi-actor approach. In any given country analysis starts at the national economy level then descends to the farm and farm household level. In our study we analysed the life histories of nineteen non-representatively selected Hungarian family farms. In doing so, we determined that, to understand new initiatives undertaken by farmers, it was better to examine their motivation than merely examining the initiatives themselves. At the farm household level, multifunctionality is strongly related to achieving livelihood strategies and constitutes a possible risk management solution. The analysis has revealed farmers’ motivations for undertaking multifunctional...
Tipo: Journal Article
Palavras-chave: Multifunctional agriculture; Rural economy; Risk management; Farmers’ motivation; Life history; Agricultural and Food Policy; Community/Rural/Urban Development; Institutional and Behavioral Economics; Risk and Uncertainty.
Ano: 2009
URL: http://purl.umn.edu/49196

Histórico de vida de espécimens selvagens e variantes cromáticas de Gracilaria birdiae (Gracilariales, Rhodophyta)
Provedor de dados: Revista Brasileira de Botânica
Autores: VIVIANE L.,COSTA; PLASTINO,ESTELA M.
(Gracilariales, Rhodophyta) é uma macroalga marinha de coloração vermelha (vm) comum na costa Nordeste do Brasil e amplamente coletada para a extração de ágar. O objetivo deste estudo foi completar o histórico de vida de espécimens selvagens (coloração vermelha) e variantes cromáticas. Duas variantes foram isoladas, além dos espécimens selvagens coletados na praia de Paracuru, Ceará: i, marrom-esverdeada (me), encontrada em uma população natural da praia de Paracuru; e ii, verde (vd), obtida espontaneamente in vitro a partir de um ramo tetrasporofítico. As condições gerais de cultivo tanto para gametófitos quanto para tetrasporófitos foram: meio de cultura von Stosch 25%; fotoperíodo 14L:10E (luz: escuro); irradiância 100 µm.m-2.s-1 e aeração a cada 30...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gracilaria; Life history; Chromatic variants; Reproduction.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000500003

Mimosa splendida Barneby (Mimosoideae, Leguminosae) rediscovered in Central Brazil: preliminary studies for conservation of a rare species
Provedor de dados: Revista Brasileira de Botânica
Autores: Simon,Marcelo F.; Amaral,Marina F.
The poorly known Mimosa splendida Barneby has been rediscovered in the Chapada dos Veadeiros, Brazil, 105 years after its single record in 1895. Data on its habitat description, demography, reproductive parameters, and geographic range are presented. Preliminary results suggest that the rarity of M. splendida in herbarium collections is associated with a narrow geographic range, and a specialized habitat preference on rocky slopes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Chapada dos Veadeiros; Demography; Endemism; Life history.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000100010

Life cycle of Poratia salvator (Diplopoda: Polydesmida: Pyrgodesmidae)
Provedor de dados: Revista Brasileira de Zoologia
Autores: Pinheiro,Tamaris G.; Marques,Marinêz I.; Battirola,Leandro D.
Even though millipedes display high plasticity in their reproductive strategies, they are poorly studied in the tropical region. The present study describes the biological cycle and reports the parthenogenetic reproduction of Poratia salvator Golovatch &amp;amp; Sierwald, 2000 under environmental conditions. Collections were carried out in Pantanal of Mato Grosso and in Várzea Grande, state of Mato Grosso, Brazil. The individuals were kept at room temperature in individual plastic pots. All 18 females used in the experiment reproduced parthenogenetically, resulting in a total of 699 young individuals. Of these, 18% survived until the adult phase. The lowest survival rate of P. salvator was recorded for the first developmental stage (46%). The mean duration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Life history; Mato Grosso; Millipedes; Parthenogenesis; Reproduction.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400010

Biologia e tabela de vida de Tetranychus desertorum (Acari: Tetranychidae) sobre folhas de feijão (Phaseolus vulgaris)
Provedor de dados: Revista Brasileira de Zoologia
Autores: Rivero,Edgar; Vásquez,Carlos.
Biological aspects and life table of the red spider mite, Tetranychus desertorum Banks, 1900, were studied on leaf discs of kidney bean (Phaseolus vulgaris Linnaeus) cultivar "Tacarigua" under laboratory conditions (28 ± 2ºC, 70 ± 10% R.H. and 12:12h). Our results showed that total developmental time was 6.8 days for females, with partial duration of immature stages corresponding to 3.8, 1.4, 1.0 and 0.7 for egg, larva, protonymph and deutonymph, respectively. Preoviposition, oviposition and postoviposition periods were 1.1, 8.4 and 1.3 days, respectively; and the higher mean fecundity (6.93 eggs/female/day) was observed on day 4. Female mean longevity was 10 days. The life table parameters recorded were: net reproduction rate (Ro) = 41.10 individuals;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fecundity; Life history; Red spider mite; Tetranychid.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100007

Length-based estimates of growth parameters and mortality rates of fish populations from a coastal zone in the Southeastern Brazil
Provedor de dados: Revista Brasileira de Zoologia
Autores: Costa,Marcus Rodrigues da; Tubino,Rafael de Almeida; Monteiro-Neto,Cassiano.
ABSTRACT Small-scale fisheries in Brazil contribute to a significant share of total fish production, accessing a large variety of species. Life history parameters from these resources are important for their management and conservation, based on primary data. The objective of this article is to generate growth parameters and mortality rates of ten fish populations from a coastal zone in Southeastern Brazil. Monthly samples were taken between January 2011 and November 2014 from landings of the beach-seine fishery in an area adjacent to the entrance of the Guanabara Bay. All fishes were measured (total length) and weighed. The length-weight relationships (LWR) were estimated by linear regression analysis on log-transformed data of the equation: W = aL  b ....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyofauna; Length-weight relationships; Life history; Shallow waters; Small-scale fisheries.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100343

Breeding biology of Tyrannus melancholicus (Aves: Tyrannidae) in a restinga reserve of southeastern Brazil
Provedor de dados: Revista Brasileira de Zoologia
Autores: Daros,Hermes; Dutra,William Barbosa; Duca,Charles.
ABSTRACT Existing knowledge of the breeding success and life history characteristics of most Neotropical bird species is scarce. Here, we help fill this gap by analyzing aspects of the breeding biology of the Tropical Kingbird Tyrannus melancholicus (Vieillot, 1819), which is a good model for this kind of study as it is a common species occurring in various environments, including urban areas, but little is known about its life history. We provide results concerning the breeding period, clutch size, incubation and nestling periods, description of nests, eggs and nestlings, and the plants used for nest sites by this species. Fifty-four nests were monitored over two seasons (2012-2014) in a protected area in southeastern Brazil. Nesting began at the end of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Breeding season; Clutch size; Life history; Tropical Kingbird.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100308

Latitudinal disparity in the reproductive cycle of sharpnose shark, Rhizoprionodon lalandii (Elasmobranchii: Carcharhinidae), in Atlantic waters off South America
Provedor de dados: Revista Brasileira de Zoologia
Autores: Macedo,Morgana M.; Sousa,Marcia F.; Batista,Vandick S.
Geographical variation in biophysical conditions may strongly influence the life history characteristics of widely distributed species, such as the Brazilian sharpnose shark, Rhizoprionodon lalandii (Müller &amp;amp; Henle, 1839). Here, we use original and secondary data of reproductive traits of R. lalandii to identify population differences among northern/northeastern and southern Atlantic waters of South America. In the southeast region, birth occurs between December and March, and the young become frequent along the coast between April and September. Mating occurs mainly between March and June, when females with bite marks are common. Females in early pregnancy occur between March and September. The reproductive cycle of R. lalandii in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal waters; Life history; Reproductive traits; Northeastern Brazil.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000500004

Development of Myrmeleon brasiliensis (Navás) (Neuroptera, Myrmeleontidae), in laboratory, with different natural diets
Provedor de dados: Zoologia
Autores: Missirian,Giani L. B.; Uchôa-Fernandes,Manoel A.; Fischer,Erich.
Antlions larvae are sit-and-wait predators that capture arthropod prey in conical sand pits. The aim of this paper were to determine the effect of different natural diets [leaf-cutting ants (Atta spp.), fruit fly larvae (Anastrepha spp. and Ceratitis capitata) and mixed diet (Atta spp. plus fruit fly larvae)] on the development of larvae and pupae of M. brasiliensis (Navás, 1914) and to estimate the number and size of prey caught in each instar and on each kind of diet. The average duration (days) of the second and third instars of M. brasiliensis was longer when larvae of antlion were fed with leaf-cutting ants. The diets did not affect the duration of the pupal stage nor the pupae size. The different diets did not affect the mean width of head capsule...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antlion; Life history; Predation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400009

Disease, food and reproduction of the maned wolf: Chrysocyon Brachyurus (Illiger) (Carnivora, Canidae) in southeast Brazil
Provedor de dados: Zoologia
Autores: Carvalho,Cory T. de; Vasconcellos,Luiz E. M.
The most frequent endoparasite of the Maned wolf - Chrysocyon brachyurus (Illiger, 1815) is the giant kidney-worm. Dioctophyma renale (Goeze, 1782). It has heen responsible for the majority of deaths of captive animals. Twenty-six marked wolves have been followed in the field with ear-tags and radio-collar tagged (Tab. II) to investigate their interactions with the environment, their diurnal shelters, movements and habits, and their delivery sites. Ten years of life history data have heen gathered. They are territorial and monogamous, and give birth to two or three young once a year, after a 63 days gestation, on average. Maned wolves inhabit the open areas and have omnivorous feeding habits.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maned wolf; C. brachyurus; Life history; Disease; Food; Reproduction.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000300018

Reproductive phenological pattern of Calotropis procera (Apocynaceae), an invasive species in Brazil: annual in native areas; continuous in invaded areas of caatinga
Provedor de dados: Acta Botanica Brasilica
Autores: Sobrinho,Mellissa Sousa; Tabatinga,George Machado; Machado,Isabel Cristina; Lopes,Ariadna Valentina.
In this study, we evaluated the phenological patterns (vegetative and reproductive) of Calotropis procera (Apocynaceae-Asclepiadoideae) in Brazil, comparing its phenology in an area where it is invasive with that observed in areas to which it is native. Phenological observations were carried out over a 24-month period at sites in and around areas of caatinga (shrublands). We estimated the relative frequency of each phenophase, and we documented a dramatic difference between phenophases in terms of the pattern of reproductive phenology . The pattern of continuous flowering and fruiting observed in the invaded area strongly diverges from the 2- to 6-month flowering and fruiting period of the annual pattern. The continuous pattern of reproduction seems to...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Asclepiadoideae; Flowering; Fruiting; Life history; Phenological plasticity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200018

Survival and growth of tree seedlings as a function of seed size in a gallery forest under restoration
Provedor de dados: Acta Botanica Brasilica
Autores: Macera,Leonardo Gallo; Pereira,Silvia Rahe; Souza,Andréa Lúcia Teixeira de.
ABSTRACT Seed size is commonly related to higher rates of emergence and survival, and biomass of seedlings when introduced by direct seeding. However, few studies have evaluated whether this relationship persists when species are reintroduced as seedlings or if this effect persists after seed reserves decline. This study evaluated the effect of seed size (mass) on the probability of survival and growth of seedlings of nine native tree species introduced into a pasture area, which was originally a gallery forest in the state of São Paulo in Southeastern Brazil. The experiment occurred over the course of 24 months, in which was divided into three separate time intervals: 14 to 61 days, 61 days to 12 months, and 12 to 24 months. Seedling survival in the field...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional trait; Life history; Nursery-raised seedling planting; Pioneering species; Species reintroduction.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400539

Reproduction of a whiptail lizard (Ameivula ocellifera, Teiidae) from a coastal area in northeastern Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: ZANCHI-SILVA,DJAN; BORGES-NOJOSA,DIVA M.; GALDINO,CONRADO A.B.
The reproductive ecology of Ameivula ocellifera was studied from September 2009 to August 2010 in a coastal area of the state of Ceará, Brazil. Females reproduced continuously throughout the year, with a peak at the end of the rainy season. Even though there was a predominance of pre-reproductive individuals in the sample, gonadal activity of males peaked synchronously to female reproduction. Mean clutch size was 1.98 ± 0.56 and positively associated with female body size, while mean egg volume was 510.54 ± 84.29 mm3 and unrelated to female body size. We did not find any association between clutch size and average egg volume.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ameivula; Cnemidophorus; Life history; Reproductive cycle.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301263

Reproduction and growth in a Neotropical arboreal mouse: Oecomys rutilus (Sigmodontinae: Cricetidae) in French Guiana
Provedor de dados: Biota Neotropica
Autores: Catzeflis,François.
Abstract: Postnatal growth and development of the small Neotropical mouse Oecomys rutilus (Sigmodontinae: Cricetidae) were investigated from birth to day 143, in the laboratory. Morphometric measurements at age of 3 days, of both sexes combined, revealed body weight to be 3.4 ± 0.3 g, mean tail length as 27.4 ± 1.1 mm, and mean hind foot length as 9.3 ± 0.7 mm. Body weight was found to increase steadily until at least 69 days, whereas the instantaneous growth rates of other measurements declined earlier: the daily growth of hind foot length declined to a minimum at age of 24 days, and the growth of tail and of ear declined by the age of 33 days. Average litter size for 12 captive births was 2.5, ranging from 2 to 3. The preserved eye crystalline lens was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Gompertz model; Rodents; Eye-lens weight; Life history.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200207