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Registros recuperados: 18
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A new device to autonomously feed individualized mantids on extended periods of time Rev. Bras. entomol.
Scherrer,Marcus V.; Aguiar,Alexandre P..
ABSTRACT Mantises can live for many months, are naturally voracious, and feed invariably on live prey. Many species have a propensity for cannibalism and cannot be kept together for most of their life cycle, which makes large-scale rearing typically time-consuming, thus easily becoming prohibitive. This is particularly true for early instars, because they are the most abundant stage of a developmental cohort. Such limitation hinders research on Mantodea which depend on live individuals, such as behavior, physiology, ontogeny, and others. In this work, a simple, low-maintenance “self-service” device is described, which is greatly effective in reducing the time needed for keeping live, individual, small to medium-sized mantises. Trial and error usage and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mantodea; Praying mantis; Rearing; Captive breeding; Cannibalism.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000400316
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Alimentación de Merluccius hubbsi e impacto del canibalismo en la región comprendida entre 34°50'-47°s del Atlántico Sudoccidental. OceanDocs
Sánchez, M.F.; Garcia de la Rosa, S.B..
Feeding of Argentine hake during winter 1994, between 50 and 370 m of depth, in the studied area (34°50'-47°S), is based on the consumption of zooplanktonic crustaceans, fishes and cephalopods. Maximum feeding incidence is found at 36°-40°S (51. ), in sea layer of 80-130 m deep (62. ) and between 8:00-10:00 hours (36,6. ). Cluster analysis shows five spatial groups, with similar length distributions and characteristic principal prey items combination. The males of all sizes show a trend to feed on euphausids and hiperiids amphipods. The females eat more quantities of hake, short fin squid and other fishes. There is a change in diet related with predator size, from 47 cm TL onwards for males, and from 53 cm TL for females. This change consists in a decrease...
Tipo: Journal Contribution Palavras-chave: Feeding; Cannibalism; Food organisms; Prey selection; Feeding; Cannibalism; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_9580.
Ano: 1999 URL: http://hdl.handle.net/1834/1874
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Cannibalism studies on eggs and newly hatched caterpillars in a wild population of Ascia monuste (Godart) (Lepidoptera, Pieridae) Rev. Bras. entomol.
Zago-Braga,Rosana C.; Zucoloto,Fernando S..
Ascia monuste (Godart), also known as cabbage caterpillar, is considered herbivorous and specialist in Brassicaceae; however, it performs cannibalism. Experiments carried out in this work aimed to quantify the cannibalism occurrence in A. monuste, to verify whether cannibalism interferes in the species performance and to check whether cannibalism is influenced by the population size. The parameters used in order to evaluate the performance were time of development, adults weight and size, fecundity, oviposition and survival rate. Cannibalism occurred in all larval instars. There was a tendency to increase the cannibalism practice as the number of co-specific increased (potential preys). Cannibalism was more intense in larvae at the end of larval...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascia monuste; Brassica oleracea; Cannibalism; Kale caterpillar; Population control.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000300019
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Coexistence of surface and cave amphipods in an ecotone environment Naturalis
Luštrik, R.; Turjak, M.; Kralj-Fišer, S.; Fišer, C..
Interspecific interactions between surface and subterranean species may be a key determinant for species distributions. Until now, the existence of competition (including predation) between these groups has not been tested. To assess the coexistence and potential role of interspecific interactions between surface Gammarus fossarum and subterranean Niphargus timavi, and to determine their micro distributions, we conducted a series of field and laboratory observations. We aimed to determine: (1) species substrate preference, (2) whether the presence of G. fossarum influences the habitat choice of N. timavi, and (3) possible predation effects on micro habitat choice of small juveniles. Throughout a small river in SW Slovenia, N. timavi was predominantly found...
Tipo: Article / Letter to the editor Palavras-chave: Amphipoda; Cannibalism; Competition; Ecotone; Microhabitat preference; Predation; 42.74.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/377199
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Consideraciones sobre la alimentación de la caballa con especial enfasis en la depredación de huevos y larvas de peces OceanDocs
Pájaro, M..
Adult and juvenile fish inter and intraspecific predation may be an important source on these first development stages. In this work, adult and juvenile mackerel samples from two areas of Buenos Aires province, one south of Cape San Antonio and the other near Mar del Plata city were analyzed. An important anchovy postlarvae ingestion in both regions considered was observed. A high number of mackerel eggs in the stomach contents from adults was identified. This evidence of cannibalistic behaviour in the argentine mackerel is the first of its kind made in this species and allows to suggest that embryo mortality due to cannibalism might constitute and important percentage of the total embryonic mortality.
Tipo: Journal Contribution Palavras-chave: Feeding; Cannibalism; Fish larvae; Fish eggs; Feeding; Cannibalism; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_9580; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1993 URL: http://hdl.handle.net/1834/2569
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Diet and potential feeding overlap between Trichiurus lepturus (Osteichthyes: Perciformes) and Pontoporia blainvillei (Mammalia: Cetacea) in Northern Rio de Janeiro, Brazil Rev. Bras. Zool.
Bittar,Vanessa T.; Di Beneditto,Ana Paula M..
This study describes the diet and assesses potential overlap in the feeding habits of Trichiurus lepturus Linnaeus, 1758 and Pontoporia blainvilleiGervais & D'Orbigny, 1844 in northern Rio de Janeiro, southeastern Brazil. Fishes were numerically dominant in both diets, followed by cephalopods for P. blainvillei and crustaceans for T. lepturus. Both predators move along similar coastal feeding areas in northern Rio de Janeiro, but our results indicate differences in their resource exploitation, what allows for their coexistence.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cannibalism; Diet; Feeding; Food habits; Predators.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200023
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Effects of sex, host-plant deprivation and presence of conspecific immatures on the cannibalistic behavior of wild Ascia monuste orseis (Godart) (Lepidoptera, Pieridae) Rev. Bras. entomol.
Santana,Alessandra F. K.; Zago,Rosana C.; Zucoloto,Fernando S..
Effects of sex, host-plant deprivation and presence of conspecific immatures on the cannibalistic behavior of wild Ascia monuste orseis (Godart) (Lepidoptera, Pieridae). The specialist cabbage caterpillar Ascia monuste orseis (Lepidoptera, Pieridae) feeds on plants of the Brassicaceae family, but may eventually ingest conspecific eggs and larvae during the larval stage. The present study examines feeding behavior of 4th and 5th instar cabbage caterpillars in relation to sex, host-plant deprivation and presence of conspecifics. We recorded number of egg ingested per larvae, developmental indices and duration of feeding, exploratory and resting behavior. Kale deprived caterpillars presented high rates of cannibalism, development delay and decreased...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brassicaceae; Cannibalism; Feeding; Herbivorous insects.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000100015
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El canibalismo como mecanismo regulador denso-dependiente de mortalidad natural en la anchoíta argentina Engraulis anchoita. Su relación con las estrategias reproductivas de la especie. OceanDocs
Pájaro, M..
Cannibalism is not an abnormal behaviour and it can be observed in a wide number of animals. In Pisces, cannibalism may be the result of endogenous intraspecific factors (nutritional state, size, age, state of development) or exogenous intraspecific factors (food, density, light). Nevertheless, external fertilization and the high fecundity of teleost fish tend to increase egg cannibalism, in particular among filter feeding fishes such as anchovies. In the present work, two important Argentine anchovy Engraulis anchoita stocks were studied. The first is to the north of 41°S, and spawns during spring on the coastal and shelf waters of Buenos Aires Province,Argentina, and Uruguay. The second one inhabits the Patagonian region, from 41°S to 47°S. It spawns...
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Cannibalism; Natural mortality; Fish larvae; Fish eggs; Spawning seasons; Stocks; Food preferences; Reproduction; Stocks; Food preferences; Feeding behaviour; Cannibalism; Fish larvae; Reproduction; Http://aims.fao.org/aos/agrovoc/c_28772; Http://aims.fao.org/aos/agrovoc/c_3024; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_9580; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1998 URL: http://hdl.handle.net/1834/1476
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Electrolocation-communication discharges of the fish Gymnotus carapo L. (Gymnotidae: Gymnotiformes) during behavioral sleep BJMBR
Stopa,R.M.; Hoshino,K..
Technical problems have hampered the study of sleep in teleosts. The electrical discharges of Gymnotus carapo L. (Gymnotidae: Gymnotiformes) were monitored to evaluate their ease and reliability as parameters to study sleep. The discharges were detected by electrodes immersed in a glass aquarium and were recorded on a conventional polygraph. G. carapo showed conspicuous signs of behavioral sleep. During these periods, opercular beat rates were counted, electric discharges recorded, and the "sharp discharge increase" (SDI) of the orienting reflex was investigated. All 20 animals monitored maintained electrical discharges during behavioral sleep. The discharge frequencies during sleep (50.3 ± 10.4 Hz) were not significantly different from those observed when...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Sleep; Fish; Electric discharges; Cannibalism; Antipredation mechanism.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000008
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Feed training of giant trahira fingerlings fed diets containing different levels of vitamin C R. Bras. Zootec.
Kasai,Rodrigo Yutaka Dichoff; Salaro,Ana Lúcia; Zuanon,Jener Alexandre Sampaio; Sabarense,Céphora Maria; Tavares,Mateus Moraes; Campelo,Daniel Abreu Vasconcelos.
The objective of this work was to evaluate suplemenation of vitamin C during feed training of giant trahira fingerlings. An experiment was established in a complete random design with seven treatments (0.0, 17.5, 52.5, 87.5, 122.5, 175.0 and 350.0 mg vitamin C/kg diet) and four repetitions. Giant trahira fingerlings (2.8 ± 0.2 cm) were distributed in 6-L aquaria at the density of 6 fish/L. A basal diet was formulated with 44.0% of crude protein and vitamin C and bovine heart were added in it daily. After 20 days, biometry of fish for evaluation of weight and length gains, rates of survival and cannibalism and uniformity of final length and for macroscopic observations of clinical signs of deficiency or excess of vitamin was carried out. After biometry...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cannibalism; Carnivorous fish; Hoplias lacerdae; Length uniformity; Lipid profile.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300001
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Feed training of juvenile giant trahira under different light intensities R. Bras. Zootec.
Salaro,Ana Lúcia; Tavares,Mateus Moraes; Chaves,William; Campelo,Daniel Abreu Vasconcelos; Zuanon,Jener Alexandre Sampaio; Luz,Ronald Kennedy.
The aim of this study was to evaluate the influence of light intensity on the feed training of juvenile giant trahiras (Hoplias lacerdae). A completely randomized design with four light treatments and three replicates was used, and the following light intensities were tested: 204.9; 177.58; 54.64 and 0.00 lux. Juvenile giant trahiras (length = 3.0 ± 0.4 cm and weight = 0.5 ± 0.05 g) were stocked at 6 fish L-1 in 12 rectangular tanks (24 × 20 × 14 cm) containing six liters of water, and subjected to feed training to accept dry diets. At the end of the experiment (21 days), weight gain, length gain, survival, cannibalism, and mortality rates were evaluated. Data were subjected to regression analysis at 5% probability. Different light intensities did not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cannibalism; Carnivorous fish; Feed training; Hoplias lacerdae; Light.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100002
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Feeding dynamics of Cichla kelberi Kullander & Ferreira, 2006 introduced into an artificial lake in southeastern Brazil Neotropical Ichthyology
Villares Junior,Gilberto Aparecido; Gomiero,Leandro Muller.
The objective of this study was to characterize the seasonally of the diet of Cichla kelberi in an artificial lake in Leme-SP, determining the food items and their relation to the sex and gonadal maturity of the fish sampled. The diet of C. kelberi presents a dynamic in three different periods: winter months were characterized by low feeding activity and a high concentration of undetermined fish; increase in feeding activity occurred in the spring, with Tilapia sp. being the dominant food item; and a high rate of cannibalism was observed in the summer and early fall. The plasticity in the composition of the diet was marked by quantity of prey available during the different periods of the year, and the reproductive period.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Seasonality; Cannibalism; Predation; Competition.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400011
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Genetic parameters for social effects on survival in cannibalistic layers: Combining survival analysis and a linear animal model Inra
Ellen, E.D.; Ducrocq, V.; Ducro, B.J.; Veerkamp, R.F.; Bijma, P..
Background: Mortality due to cannibalism in laying hens is a difficult trait to improve genetically, becausecensoring is high (animals still alive at the end of the testing period) and it may depend on both the individualitself and the behaviour of its group members, so-called associative effects (social interactions). To analyse survivaldata, survival analysis can be used. However, it is not possible to include associative effects in the current softwarefor survival analysis. A solution could be to combine survival analysis and a linear animal model includingassociative effects. This paper presents a two-step approach (2STEP), combining survival analysis and a linear animalmodel including associative effects (LAM).Methods: Data of three purebred White...
Tipo: Journal Article Palavras-chave:  laying hens; Mortality; Cannibalism; Survival analysis; Genetic parameters.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201161f841a0&uri=/notices/prodinra1/2011/04/
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Intraspecific interactions in the mangrove crab Ucides cordatus (Decapoda: Ocypodidae) during the metamorphosis and post-metamorphosis periods under laboratory conditions Rev. Bras. Zool.
Ventura,Robson; Silva,Ubiratã A. T. da; Ostrensky,Antonio; Cottens,Kelly.
Current efforts for restocking natural populations of the mangrove crab Ucides cordatus (Linnaeus, 1763) in Brazil have focused on developing a methodology for stimulating the metamorphosis of U. cordatus larvae at a large scale. The aim of the present study was to compare the mortality rates both in individual and mass conditions, during the induction of metamorphosis of megalopa to juvenile in U. cordatus, without the use of mangrove sediment as substrate. Furthermore, the importance of intraspecific antagonistic behavior on survivorship rates during early post-metamorphosis period was investigated. Metamorphosis was induced by the use of water conditioned with conspecific adults (30 indiv. 100 L-1 for 24 hours). In the first assay, megalopae were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cannibalism; Juvenile; Megalopa; Nursery.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100001
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Ontogenetic and spatial variation in the diet of hake (Merluccius merluccius) in the Bay of Biscay and the Celtic Sea ArchiMer
Mahe, Kelig; Amara, R; Bryckaert, T; Kacher, M; Brylinski, J.
Analysis of the diet of trawl-caught hake (Merluccius merluccius) from three locations in the Bay of Biscay and the Celtic Sea in autumn 2001 showed that small hake fed almost exclusively on crustaceans (mainly euphausiids), but that there was a significant shift towards a fully piscivorous diet in hake > 23 cm. A change in fish prey was also size-dependent, because smaller hake (< 30 cm) preyed on small pelagic fish (3-12 cm), such as horse mackerel, anchovy, and pilchard, and larger hake on larger demersal prey (12-23 cm), such as blue whiting. There was a significant positive relationship between hake and fish prey length. In terms of fish prey selectivity, hake exhibited particular preference for small pelagic prey (anchovy, pilchard, and...
Tipo: Text Palavras-chave: Spatial variations; Prey selectivity; Northeast Atlantic; European hake; Diet; Cannibalism.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3849.pdf
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Reproductive ecology and behavior of Thoropa miliaris (Spix, 1824) (Anura, Leptodactylidae, Telmatobiinae) Biota Neotropica
Giaretta,Ariovaldo Antonio; Facure,Kátia Gomes.
Thoropa species are distributed in southern and southeastern Brazil and have semiterrestrial tadpoles on rocky environments. Herein, we provide further data on reproduction, paternal care and tadpole cannibalism in T. miliaris. Guarding males were tested for disturbances in their egg masses. Egg masses were laid in stripes of wet rock; eggs were in a single layer and were adhered to the rock surface, roots, and to one another. The tadpoles hatched between four and six days. The egg number in two egg masses was 750 and 1190; eggs were gray and the yolk were about 1.7 mm in diameter; 2.3 mm with the jelly capsule. Aggressive interactions were observed between males. Males remained with their egg masses during the night and reacted aggressively to the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thoropa miliaris; Parental care; Reproduction; Cannibalism; Atlantic forest; Brazil.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032004000200008
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Survival of Ucides cordatus (Decapoda: Ocypodidae) megalopae during transport under different conditions of density and duration Rev. Bras. Zool.
Ventura,Robson; Silva,Ubiratã A. T. da; Ostrensky,Antonio; Cottens,Kelly; Perbiche-Neves,Gilmar.
Target areas for Ucides cordatus (Linnaeus, 1763) restocking programs are often located far from the laboratory where larval rearing is developed. During translocation, the larvae are submitted to highly stressful conditions due to handling, packing, and transport activities. The aim of the present study was to assess the mortality rates of U. cordatus megalopae caused by different transportation procedures. Megalopae at loading densities of 50, 150, and 300 ind.L-1 were packed in double polyethylene 12 x 25 cm plastic bags with 200 ml of marine water at salinity 30. The bags were filled with oxygen at a proportion of 1:2 parts of water and sealed tightly. The trepidations during transport were simulated by the use of a shaker device (800...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cannibalism; Larvae; Mangrove crab; Stress; Transport.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600001
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Young didelphid consumption by Micoureus paraguayanus (Didelphimorphia: Didelphidae) in southeastern Brazil Mastozool. neotrop.
Pires,Mathias M.; Martins,Eduardo G.; Cruz,Leonardo D.; Fernandes,Fernanda R.; Carvalho,Rute B. G. Clemente-; Silva,Maria Nazareth F.; Reis,Sérgio F. dos.
In a study aiming to describe the diet of Micoureus paraguayanus in a southeastern Brazilian Cerrado (savannah-like) remnant, we found young didelphid remains in fecal samples from live-trapped adults. These findings uncovered either events of scavenging on dead young didelphids or infanticide adding to the knowledge on the dietary breadth and behavioral ecology of M. paraguayanus.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cannibalism; Cerrado; Didelphid; Infanticide.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832010000100023
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