The response of rainbow trout (Salmo gairdneri) to lures was investigated in trolling experiments at Loon Lake, British Columbia. The "action" of a lure was found to be an important parameter in determining its efficiency: of four actions tested, the flatfish caught the greatest number of fish. Although the color of lure was not significant, red lures were more efficient than yellow, green, and blue, and more efficient than various color patterns of red and white. The presence of a dodger with lures did not affect their efficiency, but larger fish were caught. No size selection occurred with either colors or actions of lures. In laboratory feeding experiments using dyed trout eggs as food, red was selected first or second more often than yellow, green, or blue. The color of background against which the fish were fed, and individual differences among fish caused significant changes in the preference shown for various colors of food. Combining two colors also affected the selection intensity, depending upon the contrast between the two colors. Preferences for different colors of food were not influenced by the hunger level of the fish, measured in terms of the quantity of food in the fish's gut. In the course of the experiments it was incidentally observed: (1) that rainbow trout possess a striking ability to match the hue of their skin (mainly in the dorsal region) to that of the background in which they are kept; (Z) the color of background affects the activity level of rainbow trout: yellow produces the highest level of activity and green the lowest. / Science, Faculty of / Zoology, Department of / Graduate

A total of 192 largemouth bass were caught at Lake Ray Roberts, Texas (1995) to investigate five controversial bass angling techniques relative to hooking mortality. The bait types were Texas-rigged scented and non-scented plastic worms, Carolina-rigged scented and non-scented plastic worms, and live golden shiners. Overall hooking mortality was 21.87% and mortality was dependent upon bait type. Highest mortality resulted from the Texas-rigged scented lures, while the lowest mortality was generated by live golden shiners. A creel survey indicated that few anglers were having success with the investigated baits. Factors that had a confirmed effect on hooking mortality were hooking location and water temperature. Hooking mortality was not excessive compared to other similar studies.

The Puerto Rican Nightjar Caprimulgus noctitherus is an endangered species found in forest of southern Puerto Rico. I documented density of nightjars in Guánica Forest, the region of Guayanilla-Peñuelas, and Susúa Forest. The geographic range of the species was expanded because of this study and presence documented in a number of new localities. Stand level habitat model indicated forest type and midstory visual obscurity best predicted nightjar habitat. Landscape model predicted considerably more suitable nightjar habitat exists than had been previously estimated (> 30%) and highlighted several areas of importance for the species. I evaluated nightjar population estimation techniques and found use of point transects with lures (playback) and moon phase covariates generated best estimates. My results highlighted several sites currently under private ownership that should be protected or acquired. Establishment of new protected areas for the nightjar represents highest priority for conservation and eventual delisting of the species.

Made available in DSpace on 2016-12-08T16:44:41Z (GMT). No. of bitstreams: 1 PGPV12MA099.pdf: 1026423 bytes, checksum: 9953859704cc50eabc5e4ee44d896b54 (MD5) Previous issue date: 2012-08-30 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / During all the crop cycle the apple tree (Malus domestica), is damaged by a group of Lepidoptera insect species identified as "big caterpillars" of the families Noctuidae and Geometridae. The big caterpilars would cause losses to the apple production by damaging leaves and fruits. Due the economic importance, mainly for the regions of southern Brazil, there is a need to protect the apple plants against the attack of the main pests and establishment of monitoring forms to avoid the increasing population of pests in commercial orchards. Thus, the present study aimed to monitor in the field the phase of eggs, larvae and adults of the Physocleora dimidiaria, Pseudoplusia includens and Peridroma saucia species and assess the fruit damage caused by these species. In randomized block design with four replications was tested the following floral attractives: T1 - Attractive 1; T2 - Attractive 2; T3 - Attractive 3; T4 - Attractive 4; T5 - Attractive 5 and T - Control (without attractive substance). The tested substances were delivered in one mL eppendorfes tubes closed with cotton and fixed on the sticky bottoms of delta traps hung at 1.65 m from the ground. The substances were replaced every 45 days. Weekly recordings of moths catches were done to obtain the adults population. For monitoring caterpillars in the rows vegetation it was used a sweeping net by sweeping motions starting 5 meters forward and backward from sampled plants with traps. The occurrences of postures (eggs) and caterpillars were also evaluated in the apple plants located at the left, right and in front of the trapped plant itself. All the collected material were stored in plastic containers and sent to the Entomology Laboratory of EEFCT for screening. For the fruit damage assessment 2400 fruits were harvested and visually evaluated for external damages caused by big caterpillars . All data were submitted to the transformation of √ x +1 and the Duncan test at 5% level of probability. The results showed that the species P. dimidiaria were present during all apple grow season both as adult (288 moths) and as caterpillar phase, present in sprouts plants (24) and in the rows vegetation (12 larvae) of the orchard. The species P. includens was present in some plants as caterpillar phase (10 larvae) and as moths were captured in traps (175 adults) and its population ranging from one season to another. Postures of P. saucia (65) were found in apple plants, but none of them hatched, only 7 adults of this species were captured and no caterpillar was found on apple trees. The damage caused by species of "big caterpillars" in this study were 1.54% in the first and 2.5% in the second apple crop seasons. In general the floral attractive captured 649 and 671 adults of the three moths species in the first and second harvest, respectively / Durante todo o ciclo de cultivo a macieira (Malus domestica) é atacada por um conjunto de espécies de insetos da Ordem Lepidoptera, definidas como "grandes lagartas" pertencentes as famílias Noctuidae e Geometridae, responsáveis por danos como desfolha e perfurações em frutos, causando perdas de produção. Devido a importância econômica da macieira, principalmente para as regiões produtoras do Sul do Brasil, há a necessidade de proteger as plantas contra o ataque das principais pragas e estabelecer formas de monitoramento para evitar o aumento da população das pragas em pomares comerciais. Assim, o presente trabalho teve por objetivo monitorar o comportamento das fases de postura, de lagarta e de adultos das espécies Physocleora dimidiaria, Pseudoplusia includens e Peridroma saucia, bem como avaliar os danos causados por estas espécies. Em delineamento de blocos casualisados com quatro repetições foi testado a campo os seguintes atrativos florais: T1 Atrativo 1; T2 Atrativo 2; T3 Atrativo 3; T4 Atrativo 4; T5 Atrativo 5 e T Testemunha (sem substância atrativa). Um mL de cada atrativo foi colocado em tubos eppendorfes vedados com algodão e fixados no piso colante de armadilhas tipo Delta presas a planta a 1,65 m do solo e trocados a cada 45 dias. As armadilhas foram monitoradas semanalmente coletando-se as mariposas capturadas para obter-se a flutuação populacional de adultos. Para o monitoramento de lagartas nas entre linhas foi utilizada rede de varredura partindo 5 metros a frente e 5 metros para trás das plantas com armadilhas. Foram vistoriadas as plantas de macieira localizadas a esquerda, a direita e a frente e a própria planta com armadilha em busca de posturas e lagartas. Todos os indivíduos coletados foram acondicionados em potes plásticos e encaminhados para triagem no laboratório de Entomologia da EEFCT. Para avaliação de danos, 2400 frutos foram colhidos e avaliados visualmente. Todos os dados foram submetidos a transformação de √x+1 e ao teste de Duncan a nível de 5 % de probabilidade. Os resultados mostraram que a espécie P. dimidiaria está presente durante todos os estádios fenológicos da macieira tanto na fase de adulto (288 mariposas) como na fase de lagarta, presente nos rebrotes das plantas (24) e na vegetação (12) das entre linhas do pomar. A espécie P. includens esteve presente em algumas plantas na fase de lagarta (10 indivíduos) e quando mariposa foi capturada em armadilhas (175 adultos), oscilando sua população de uma safra para outra. Posturas de P. saucia (65) foram encontradas em plantas de macieira, porém nenhum ovo eclodiu, somente 7 adultos desta espécie foram capturados e nenhuma lagarta foi encontrada nas macieiras. Os danos causados pelas espécies de grandes lagartas neste estudo foram de 1,54 % na primeira safra e de 2,5 % na segunda. Em geral os atrativos florais capturaram 649 e 671 adultos das três espécies de mariposas na primeira e segunda safra, respectivamente

Os agroecossistemas consistem em complexas relações tróficas entre plantas, herbívoros, e seus inimigos naturais. Sabe-se que a maioria das plantas é capaz de produzir compostos voláteis, utilizados como sinais químicos por diferentes grupos de insetos. Esses voláteis podem ser produzidos de forma constitutiva em plantas sadias, ou seja, sem indução. Por outro lado, a produção de voláteis induzidos se dá a partir do contato de secreções liberadas pelo fitófago com injurias ocasionadas pela alimentação ou oviposição no tecido vegetal. Para os fitófagos esses voláteis podem sinalizar a presença da planta hospedeira, bem como a presença de coespecíficos e do parceiro sexual. Já para os inimigos naturais, predadores e parasitóides, os voláteis induzidos podem sinalizar a presença do inseto fitófago (presa/ hospedeiro) na planta. Nesse contexto as respostas comportamentais de Diaphorina citri Kuwayama (Hemiptera: Psyllidae), aos voláteis de plantas de murta, Murraya paniculata (L.) Jack (Rutaceae), infestadas ou não por coespecíficos, foram estudadas. Também foram investigadas as respostas dos psilídeos aos voláteis de plantas de Citrus sinensis (L.) Osbeck (Rutaceae) infectadas por bactérias causadoras do Huanglongbing ou HLB, uma das mais sérias doenças dos citros. Nos bioensaios visando compostos repelentes a D. citri, foram testados os voláteis de plantas de goiaba, Psidium guajava L.(Myrtaceae) e sua interferência na localização de plantas de Citrus limonia (L.) Osbeck (Rutaceae) pelos psilídeos. As respostas comportamentais foram mensuradas em olfatômetro Y e de quatro vias. Antes de estabelecer os bioensaios de olfatometria foram realizados estudos do comportamento sexual de D. citri. Os resultados obtidos evidenciaram que o início da atividade sexual de D. citri ocorreu entre o segundo e terceiro dia após a emergência, e que os psilídeos foram mais ativos durante a fotofase. Quanto às influências dos voláteis de plantas, machos e fêmeas de D. citri responderam diferentemente aos mesmos estímulos olfativos. Assim, os machos foram atraídos apenas aos odores associados às fêmeas. Já as fêmeas, foram atraídas aos odores das plantas, porém, evitando os odores associados aos machos, inclusive de plantas previamente infestadas por estes. Verificou-se também, que os adultos de D. citri distinguiram os voláteis de citros com HLB dos voláteis de plantas saudáveis. Sendo assim, ficou nítida a atratividade dos voláteis de plantas infectadas, tanto aos psilídeos machos quanto às fêmeas. Na busca por compostos repelentes, também foi possível demonstrar que os voláteis de P. guajava não somente dificultou à localização de plantas de C. limonia por D. citri, como também repeliram os psilídeos. As descobertas aqui apresentadas poderão auxiliar a elaboração de novas táticas para o manejo comportamental de D. citri. / The agro-ecosystems consist of complex trophic relationships between plants, herbivores and their natural enemies. It is known that the majority of plants can produce volatiles compounds used as chemical signals by different groups of insects. These compounds can be produced constitutively in healthy plants, i.e., without induction. In other hand, the production of induced volatiles occurs from the contact of secretions released by phytophagous with injuries caused by feeding or oviposition in plant tissue. For phytophagous, these volatile compounds may signal the presence of the host plant, as well as the presence of conspecifics and the sexual partner. Although, natural enemies, predators and parasitoids, the induced volatiles can signal the presence of phytophagous insects (prey / host) in the plant. In this context, the behavioral responses of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) to plant volatiles of jasmine, Murraya paniculata (L.) Jack (Rutaceae) infested or not by conspecifics, were studied. It was also investigated the responses of psyllids to volatiles of Citrus sinensis infected by bacteria that cause the huanglongbing or HLB, one of the most serious diseases of citrus. Given the studies that aim to identify repellent compounds to D. citri, it was tested plant volatiles of guava, Psidium guajava L. (Myrtaceae) and their impact on plant location of Citrus limonia (L.) Osbeck (Rutaceae) by psyllids. Behavioral responses were measured by Y-tube and four-way olfactometers. Before establishing the olfactometry assays, studies of D. citri sexual behavior were performed. The obtained results showed that the beginning of D. citri sexual activities occurred between the second and third days after emergence, and the psyllids were more active during the photophase. In regard to the effects of plant volatiles, males and females of D. citri differently responded to the same olfactory stimuli. Thus, males were attracted only to odors associated with females. Females were attracted to plant odors, although they avoided odors associated with males, including plants previously infested by them. It was also verified that D. citri adults distinguished volatiles citrus with HLB from volatiles released by healthy plants. Given that, it was clear that volatiles from infected plants were attractive to both males and females psyllids. In search of repellent compounds, also was possible demonstrated that P. guajava volatiles not only hindered the location of plants of C. limonia by D. citri, but also provided repellent effect to psyllids. The findings presented here may help the development of new tactics for the behavioral management of D. citri.

Os agroecossistemas consistem em complexas relações tróficas entre plantas, herbívoros, e seus inimigos naturais. Sabe-se que a maioria das plantas é capaz de produzir compostos voláteis, utilizados como sinais químicos por diferentes grupos de insetos. Esses voláteis podem ser produzidos de forma constitutiva em plantas sadias, ou seja, sem indução. Por outro lado, a produção de voláteis induzidos se dá a partir do contato de secreções liberadas pelo fitófago com injurias ocasionadas pela alimentação ou oviposição no tecido vegetal. Para os fitófagos esses voláteis podem sinalizar a presença da planta hospedeira, bem como a presença de coespecíficos e do parceiro sexual. Já para os inimigos naturais, predadores e parasitóides, os voláteis induzidos podem sinalizar a presença do inseto fitófago (presa/ hospedeiro) na planta. Nesse contexto as respostas comportamentais de Diaphorina citri Kuwayama (Hemiptera: Psyllidae), aos voláteis de plantas de murta, Murraya paniculata (L.) Jack (Rutaceae), infestadas ou não por coespecíficos, foram estudadas. Também foram investigadas as respostas dos psilídeos aos voláteis de plantas de Citrus sinensis (L.) Osbeck (Rutaceae) infectadas por bactérias causadoras do Huanglongbing ou HLB, uma das mais sérias doenças dos citros. Nos bioensaios visando compostos repelentes a D. citri, foram testados os voláteis de plantas de goiaba, Psidium guajava L.(Myrtaceae) e sua interferência na localização de plantas de Citrus limonia (L.) Osbeck (Rutaceae) pelos psilídeos. As respostas comportamentais foram mensuradas em olfatômetro Y e de quatro vias. Antes de estabelecer os bioensaios de olfatometria foram realizados estudos do comportamento sexual de D. citri. Os resultados obtidos evidenciaram que o início da atividade sexual de D. citri ocorreu entre o segundo e terceiro dia após a emergência, e que os psilídeos foram mais ativos durante a fotofase. Quanto às influências dos voláteis de plantas, machos e fêmeas de D. citri responderam diferentemente aos mesmos estímulos olfativos. Assim, os machos foram atraídos apenas aos odores associados às fêmeas. Já as fêmeas, foram atraídas aos odores das plantas, porém, evitando os odores associados aos machos, inclusive de plantas previamente infestadas por estes. Verificou-se também, que os adultos de D. citri distinguiram os voláteis de citros com HLB dos voláteis de plantas saudáveis. Sendo assim, ficou nítida a atratividade dos voláteis de plantas infectadas, tanto aos psilídeos machos quanto às fêmeas. Na busca por compostos repelentes, também foi possível demonstrar que os voláteis de P. guajava não somente dificultou à localização de plantas de C. limonia por D. citri, como também repeliram os psilídeos. As descobertas aqui apresentadas poderão auxiliar a elaboração de novas táticas para o manejo comportamental de D. citri. / The agro-ecosystems consist of complex trophic relationships between plants, herbivores and their natural enemies. It is known that the majority of plants can produce volatiles compounds used as chemical signals by different groups of insects. These compounds can be produced constitutively in healthy plants, i.e., without induction. In other hand, the production of induced volatiles occurs from the contact of secretions released by phytophagous with injuries caused by feeding or oviposition in plant tissue. For phytophagous, these volatile compounds may signal the presence of the host plant, as well as the presence of conspecifics and the sexual partner. Although, natural enemies, predators and parasitoids, the induced volatiles can signal the presence of phytophagous insects (prey / host) in the plant. In this context, the behavioral responses of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) to plant volatiles of jasmine, Murraya paniculata (L.) Jack (Rutaceae) infested or not by conspecifics, were studied. It was also investigated the responses of psyllids to volatiles of Citrus sinensis infected by bacteria that cause the huanglongbing or HLB, one of the most serious diseases of citrus. Given the studies that aim to identify repellent compounds to D. citri, it was tested plant volatiles of guava, Psidium guajava L. (Myrtaceae) and their impact on plant location of Citrus limonia (L.) Osbeck (Rutaceae) by psyllids. Behavioral responses were measured by Y-tube and four-way olfactometers. Before establishing the olfactometry assays, studies of D. citri sexual behavior were performed. The obtained results showed that the beginning of D. citri sexual activities occurred between the second and third days after emergence, and the psyllids were more active during the photophase. In regard to the effects of plant volatiles, males and females of D. citri differently responded to the same olfactory stimuli. Thus, males were attracted only to odors associated with females. Females were attracted to plant odors, although they avoided odors associated with males, including plants previously infested by them. It was also verified that D. citri adults distinguished volatiles citrus with HLB from volatiles released by healthy plants. Given that, it was clear that volatiles from infected plants were attractive to both males and females psyllids. In search of repellent compounds, also was possible demonstrated that P. guajava volatiles not only hindered the location of plants of C. limonia by D. citri, but also provided repellent effect to psyllids. The findings presented here may help the development of new tactics for the behavioral management of D. citri.

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