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Academic literature on the topic 'Poecilia reticulata'

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Published: 4 June 2021
Last updated: 9 March 2023

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Journal articles on the topic "Poecilia reticulata"

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Abu-Almaaty, A. H., Mary Welson-Zekry, Yaseen Essa, and Yaseen Essa. "Using cytogenetic analysis RAPD in determination of genetic variations among four species of ornamental fishes of family: Poecilidae (Order: Cyprinodontiform)." Genetika 47, no. 3 (2015): 1131–48. http://dx.doi.org/10.2298/gensr1503131a.

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The karyological and molecular analysis of four fresh water fish species of Family: Poecilidae and their genetic relationships have been studied. Xiphophorus maculates and Xiphophorus hellerii have the same diploid chromosome number 2n=48, but they were different in their karyotypes. Poecilia sphenops and Poecilia reticulata have the same diploid chromosome number 2n=46 and the same fundamental number FN=46, also the same karyotype one group of acrocentric chromosomes. Nine RAPD primers, showed monomorphic bands, were used for the construction of the dendrogram and a similarity matrix. A total of 65 bands were obtained; 39 of them were monomorphic bands. Similarity values among the studied samples ranged from 21% to 38%. High similarity value was obtained between Xiphophorus maculates and Xiphophorus hellerii. (38%) and the low similarity values were obtained between Xiphophorus hellerii and Poecilia reticulata (21%). The cluster analysis clearly differentiated Xiphophorus maculates and Xiphophorus hellerii from Poecilia sphenops and Poecilia reticulata. RAPD analysis confirmed that the four species under study are genetically different from each other. These cytogenetic data obtained can be applied for further studies in cytotaxonomy and evolutionary relationships of fishes.
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BRAGANÇA, PEDRO H. N., and FELIPE P. OTTONI. "On the availability of the name Poecilia kempkesi Poeser 2013 (Cyprinodontiformes: Poeciliidae)." Zootaxa 4927, no. 2 (February 12, 2021): 294–96. http://dx.doi.org/10.11646/zootaxa.4927.2.10.

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The poeciliid species, Poecilia kempkesi Poeser, 2013, was the fourth species of the subgenus Acanthophacelus Eigenmann, 1907 to be described, based on individuals from a single urban anthropized locality close to Paramaribo, Suriname (Poeser, 2013). The description itself lacked any section clearly distinguishing the new species from the remaining species of Poecilia Bloch & Schneider 1801, and in particular from the species of the subgenus Acanthophacelus, type species Poecilia reticulata Peters, 1859. According to Article 13 of the International Code of Zoological Nomenclature (ICZN, 1999) the criteria of availability for a species-group name are:
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Cavalcanti, Luciano Pamplona de Góes, Ricardo José Soares Pontes, Ana Cláudia Ferreira Regazzi, Francisco José de Paula Júnior, Rodrigo Lins Frutuoso, Emanuel Primos Sousa, Fábio Fernandes Dantas Filho, and José Wellington de Oliveira Lima. "Competência de peixes como predadores de larvas de Aedes aegypti, em condições de laboratório." Revista de Saúde Pública 41, no. 4 (August 2007): 638–44. http://dx.doi.org/10.1590/s0034-89102006005000041.

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OBJETIVO: Avaliar a competência de peixes na predação de larvas de Aedes aegypti, em condições de laboratório. MÉTODOS: Foram testados machos e fêmeas de cinco espécies de peixe. Os testes de predação duravam cinco semanas para cada espécie. Cada ensaio compreendia quatro caixas testes e quatro caixas controles. Das caixas controle, duas tinham somente um peixe e as outras duas, apenas larvas. Cada caixa teste continha um peixe e larvas. Na primeira semana foram expostas 100 larvas em cada caixa, e a cada semana acrescentavam-se 100 larvas por caixa/dia, até se obter um máximo de 500 larvas/dia. Comprimento e peso dos peixes foram medidos semanalmente. RESULTADOS: Foram utilizadas 369.000 larvas no total. O Trichogaster trichopteros foi a única espécie em que ambos os sexos predaram 100% das larvas oferecidas. O Betta splendens deixou de predar apenas 15 larvas. Machos do Poecilia reticulata apresentaram baixa capacidade larvófaga quando comparados às fêmeas da mesma espécie. Em relação ao peso e tamanho o Betta splendens mostrou-se capaz de predar 523 larvas/grama/dia. CONCLUSÕES: Fêmeas e machos de Trichogaster trichopteros e de Astyanax fasciatus, e fêmeas de Betta splendens e de Poecillia sphenops foram os peixes que apresentaram maior competência para predar as larvas. Embora com competência menor, machos de Poecillia sphenops e fêmeas de Poecilia reticulata foram capazes de eliminar o número de larvas de Aedes aegypti que possam emergir durante 24 horas num criadouro, em condições naturais. Machos de Poecilia reticulata não foram predadores eficazes.
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Moehammadi, Noer. "PENGARUH UKURAN TUBUH IKAN POECILIA RETICULATA PADA DAYA PEMANGSAANNYA TERHADAP LARVA CULEX QUINQUIFASCIATUS." Berkala Penelitian Hayati 4, no. 2 (June 30, 1999): 105–9. http://dx.doi.org/10.23869/bphjbr.4.2.19996.

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The research aimed to know the influence of Poecilia reticulata body size, in the feeding capacity on Culex quinquifasciatus larvae. The research was experimental method with Complete Random Design., each treatment with 5 replications. The taken body size of Poecilia reticulata were; 1,50 cm; 2.50 cm; and 3.50 cm. the size of fish's body was measured from the tip of snout up to the end of fin (cm). The feeding capacity was determined by subtracting the first amount of larvae which was given the rest of larvae after 24 hours. The result showed that the difference of size of Poecilia reticulate body was significantly different in the feeding capacity on Culex quinquefasciatus larvae. The fish whose body size was 1.50 cm had the lowest feeding capacity by eating 77.2 larvae for average, and the highest one was the fist which body size was 2.50 cm by eating 113.6 larvae for average, subsequently the feeding capacity decrease to the fish which body size was 3.50 cm because of eating 100,6 larvae for 24 hours.
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Gómez, Sergio, and Ricardo Ferriz. "Aquatics capacity in Poecilia reticulata (Pisces: Cyprinodontiformes)." Revista del Museo Argentino de Ciencias Naturales 4 (2002): 181–85. http://dx.doi.org/10.22179/revmacn.4.10.

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Akbar, Herizul. "Penambahan vitamin E pada pakan terhadap pemijahan dan pembesaran ikan gupi (Poecilia reticulata)." Arwana: Jurnal Ilmiah Program Studi Perairan 4, no. 1 (May 29, 2022): 27–33. http://dx.doi.org/10.51179/jipsbp.v4i1.1160.

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Penelitian ini dilakukan untuk mengetahui pengaruh pemberian jenis pakan komersial berbeda dengan penambahan vitamin E terhadap pemijahan dan pembesaran ikan gupi (Poecilia reticulata). Metode penelitian ini menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan 4 perlakuan dan 3 pengulangan. Hasil penelitian didapatkan bahwa benih ikan gupi secara keseluruhan sebanyak 266 ekor dari 9 pasang indukan. Abnormalitas didapatkan sebesar 3% dengan jumlah benih sebanyak 266 ekor dan benih yang abnormal sebanyak 8 ekor. Kelangsungan hidup benih ikan gupi (Poecilia reticulata) diperoleh sebesar 100% dengan jumlah benih yang hidup sebanyak 266 ekor. Pertumbuhan mutlak benih ikan gupi (didapatkan rata-rata peningkatan bobot sebesar 0,75 gram. Pertumbuhan panjang mutlak benih ikan gupi (Poecilia reticulata) pada 3 perlakuan didapatkan rata-rata peningkatan panjang sebesar 0,57 cm.
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Hariyanto, Sucipto, Hasan Adro’i, Mahrus Ali, and Bambang Irawan. "DNA Barcoding: A Study of Guppy Fish (Poecilia reticulata) in East Java, Indonesia." Biosaintifika: Journal of Biology & Biology Education 11, no. 2 (August 3, 2019): 272–78. http://dx.doi.org/10.15294/biosaintifika.v11i2.20222.

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Poecilia reticulata is a freshwater fish from the northeastern part of South America and spread widely to various countries in Asia and other continents. However, research about P. reticulate is limited even though it is a well-known fish species in Indonesia. The purpose of study was to identify the fish species of P. reticulata through DNA barcoding using the COI gene to determine the phylogenetic relationships among fish populations in East Java, Indonesia. In a present study, there were eight samples of P. reticulata from four different freshwater locations in East Java. Extraction, amplification, and sequencing of DNA samples were conducted to obtain the genetic data and construct a phylogenetic tree based on DNA sequences. The COI gene is the most popular markers to study genetic populations and phylogeography among the animal kingdom. Our phylogenetic reconstruction showed a clear that there were two groups of P. reticulata. The first group was obtain through species from East Java, Sukabumi, West Java (KU692776.1), Dominican Republic, Pandeglang, Banten and Myanmar. The second group was P. reticulata from southern Africa, Brazil, and Sukabumi, West Java (KU692775.1). The result of this study indicate that the guppy fish in East Java identic with P. reticulata from West Java (KU692776.1), which a widely used in classification based on evolutionary relationships. The findings of this study have important implication for the development of advance research about adaptation, phylogeny, and evolution of fish, especially of guppy fish.
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Imai, Soichi, Sayaka Tsurimaki, Eiko Goto, Kunika Wakita, and Kishio Hatai. "Tetrahymena Infection in Guppy, Poecilia reticulata." Fish Pathology 35, no. 2 (2000): 67–72. http://dx.doi.org/10.3147/jsfp.35.67.

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Ludlow, A. M., and A. E. Magurran. "Gametic isolation in guppies (Poecilia reticulata)." Proceedings of the Royal Society B: Biological Sciences 273, no. 1600 (July 5, 2006): 2477–82. http://dx.doi.org/10.1098/rspb.2006.3605.

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Martins, ML, N. Marchiori, K. Roumbedakis, and F. Lami. "Trichodina nobilis Chen, 1963 and Trichodina reticulata Hirschmann et Partsch, 1955 from ornamental freshwater fishes in Brazil." Brazilian Journal of Biology 72, no. 2 (May 2012): 281–86. http://dx.doi.org/10.1590/s1519-69842012000200008.

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In the present work Trichodina reticulata and T. nobilis (Ciliophora: Trichodinidae) are morphologically characterised from ornamental freshwater fish culture in the State of Santa Catarina, Brazil. The prevalence of infection and a list of comparative measurements are discussed. We examined "southern platyfish" Xiphophorus maculatus (n = 35), "goldfish" Carassius auratus (n = 31), "guppy" Poecilia reticulata (n = 20), "sailfin molly" Poecilia latipinna (n = 6), "beta" Betta splendens (n = 2) and "spotted headstander" Chilodus punctatus (n = 1). After being anesthetised in a benzocaine solution, fishes were examined for parasitological evaluation. A total of 51.57% fishes were parasitised by Trichodina spp. Carassius auratus was the most parasitised species, followed by X. maculatus and P. reticulata. Beta splendens, C. punctatus and P. latipinna were not parasitised by any trichodinid species. Two species of Trichodina were collected from the skin of fish: T. nobilis was found in C. auratus, P. reticulata and X. maculatus and T. reticulata was only observed in C. auratus. The importance of adequate handling in ornamental fish culture are also discussed.
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Dissertations / Theses on the topic "Poecilia reticulata"

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Thomas, Philip Richard. "Group-living in the guppy Poecilia reticulata." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485597.

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The guppy Poecilia reticulata has proven a model species for behavioural ecology; in this thesis, its patterns of group-living were examined in a variety of contexts. These fish engage in inspection, the risky approaching of a predator to gain information on the threat posed. To lessen this risk, guppies may cooperate by approaching together, taking it in turns to advance. The temptation is for fish to defect by holding back and observing the inspection of others, gaining information at their partner's expense. Theory predicts that individuals should associate with those that have been previously cooperative in order to avoid being defected against. To test this, I quantified the social networks of wild-caught female shoals of guppies and then exposed them to a pike cichlid predator Crenicichla frenata. Guppies that inspected together frequently were both more cooperative and more associated in the network than infrequently inspecting partners. Simulating defection by preventing some fish inspecting. in similar female shoals, I found, contrary to predictions, that there was no change in the preference of others. to partner with them afterwards. Guppies appear to assort with respect to cooperation but not reassort in response to defection. Additional experiments found that the number of fish, and thus the number of partners to choose from, did not change how cooperative fish were during inspection, perhaps because of consistent partner choice. I then examined if these stable partnerships observed in the laboratory occurred in the much larger social networks seen in the wild. I found that female guppies of similar inspection tendencies interacted more often than predicted by random models. If guppies prefer shoaling with particular individuals over others, they may learn preferentially from others also. Testing shoals of domestic female guppies in a novel foraging task, naIve guppies performed the task fas~er when a trained fish was highly connected to them in their social network. However, if there were two trained fish with conflicting tasks, then they performed the task of the less connected fish faster. The network position of trained fish appears to impact upon the potential for social learning of naIve fish but other factors, e.g. the competitive ability of the trained fish, may influence how naIve fish act on that information. Thus we see that the benefits to a fish of shoaling with others depend upon the shoaling partners chosen and that guppies exercise this choice with care in a number of contexts.
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Gasparini, Clelia. "Sexual conflict in the guppy, Poecilia reticulata." Doctoral thesis, Università degli studi di Padova, 2009. http://hdl.handle.net/11577/3426132.

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Sexual conflict is a widespread phenomenon in nature and it occurs over a wide range of decisions involving female-male interactions. This conflict drives the evolution of sexually antagonistic traits. Under a sexual conflict scenario, a trait that is beneficial to one sex is detrimental to the other driving the evolution of counteradaptation in a sort of ‘arm race’. In this process every evolutionary change in one sex is followed by a change in the opposite sex in order to minimize costs associated to the former. Mating frequency is one of the aspects of reproduction that could especially fuel sexual conflict and consequently sexually antagonistic coevolution because generally males have an optimal mating rate higher than females. My PhD thesis is aimed to study different aspects of sexual conflict using a small livebearing fish, Poecilia reticulata, as a model system. This species is particularly suitable for this purpose since sexual conflict is evident over mating rate, as revealed doubtless from the presence of high level of sexual harassment. I divided my researches into two main trends. First, I investigated costs and benefits of sexual conflict. Second, I focused on sexually antagonistic coevolution. Costs and benefits of sexual conflict. Estimate costs and benefits of sexual conflict shed new light on the evolution of female resistance that is assumed to evolve to minimize the costs associated to superfluous matings. However, a recent hypothesis argues that female resistance evolves as a way to screen the more successful male and therefore operate via indirect benefits mechanism. Results from a study of the effects of sexual harassment on female’s lifetime fecundity and on offspring’s quality revealed that do not support this latter hypothesis. I demonstrated only costs of sexual harassment on offspring both in daughters and in sons. Moreover, study on heritability of males’ traits influencing reproductive success both at pre- and postcopulatory level revealed scarce sire heritability that instead is a fundamental assumption of the hypothesis. The low heritability for males’ traits may be explained by adaptive phenotypic plasticity that has been investigated for sperm velocity. This demonstrated an adjustment in sperm velocity by males according to mating opportunities. Sexually antagonistic coevolution. My study of sexually antagonistic coevolution focuses on genitalia (male gonopodium and female oviduct). Gonopodial shape and dimension result important factors in determining the outcome of both consensual and coercive mating. Gonopodial length and shape resulted to be under sexual selection by female premating choice, with females mate more quickly with males possessing longer gonopodia with an enlarged shape. Gonopodium tip shape is revealed to be important in sperm transfer both in consensual and in forced matings. Another experiment demonstrated that females from low conflict population have minor control over sperm transfer in forced copulations by high conflict population males than relative counterparts. This result highlights the importance of male-female antagonistic coevolution in a sexual conflict scenario. An intraspecific study at population level corroborates this conclusion by providing evidence for a coevolutionary pattern between male and female concerning genitalia morphology. For this reason, genitalia might be the result of an evolutionary arm race between males and females in the struggle for control over mating rate and insemination success.
Il conflitto sessuale è un fenomeno ubiquitario in natura e interessa molte delle interazioni maschio-femmina portando alla evoluzione di caratteristiche sessuali antagonistiche. Per definizione, nel conflitto sessuale una caratteristica che avvantaggia un sesso comporta dei costi per l’altro sesso, per cui di conseguenza in quest’ultimo viene favorita la comparsa di controadattamenti in una sorta di ‘corsa agli armamenti’, in cui ogni cambiamento evoluzionistico che appare in un sesso è seguito da un cambiamento nell’altro sesso volto a minimizzarne i costi. La frequenza degli accoppiamenti è uno degli aspetti cruciali in cui il conflitto sessuale si manifesta e porta alla selezione sessuale antagonistica perché in generale i maschi hanno una frequenza ottimale di accoppiamenti che è maggiore di quella delle femmine. La mia tesi di dottorato ha avuto lo scopo di studiare alcuni aspetti del conflitto sessuale utilizzando Poecilia reticulata come modello di studio. Questa specie è particolarmente adatta per lo studio di queste tematiche, dal momento che è evidente la presenza del conflitto sessuale per quanto riguarda il numero di accoppiamenti, come si evince chiaramente dall’alto livello di sexual harassment (i continui tentativi di copula da parte dei maschi) subito dalle femmine. Le ricerche che ho effettuato per la mia tesi di dottorato si possono suddividere in due filoni. Primo: costi e benefici del conflitto sessuale. Secondo: coevoluzione sessuale antagonistica. Costi e benefici del conflitto sessuale. Studiare costi e benefici legati al conflitto sessuale è importante per capire l’evoluzione della resistenza femminile che si assume si sia evoluta con lo scopo di ridurre i costi legati agli accoppiamenti superflui. Di recente tuttavia si è avanzata l’ipotesi che la resistenza evolva attraverso il meccanismo dei benefici indiretti ottenuti selezionando i maschi più persistenti. Il primo lavoro ha riguardato lo studio degli effetti del sexual harassment sulla fecondità life-time delle femmine, ma anche degli effetti sulla prole. I risultati indicano che il costo del sexual harassment è visibile sulla prole, sia nei maschi che nelle femmine. Questi risultati non supportano perciò l’ipotesi che la resistenza femminile evolva attraverso l’acquisizione di benefici indiretti. Inoltre lo studio sull’ereditabilità di tratti maschili legati al successo riproduttivo ha dimostrato che tali caratteristiche sono poco ereditabili per via paterna, presupposto essenziale per questa ipotesi. La plasticità adattativa dei caratteri ne può spiegare la scarsa ereditabilità paterna riscontrata. Ho testato questa possibilità per un tratto legato al successo riproduttivo, la velocità spermatica, a seconda delle opportunità di accoppiamento percepite dal maschio. Si è dimostrato che i maschi sono in grado di modulare la velocità spermatica, confermando perciò la possibilità di un certo grado di plasticità che può spiegare i bassi valori di ereditabilità. Coevoluzione sessuale antagonistica. Lo studio della coevoluzione sessuale antagonistica si è concentrato sulla morfologia dei genitali, sia maschili che femminili. I risultati indicano che la morfologia dell’organo copulatore influenza il successo nel maschio sia negli accoppiamenti cooperativi che in quelli forzati. In particolare la dimensione e la forma generale dell’organo copulatore sono sessualmente selezionati attraverso la scelta femminile, e le femmine si accoppiano più velocemente con maschi dotati di gonopodi più lunghi e di forma allargata. Anche la forma della parte più distale del gonopodio risulta importante nel determinare il trasferimento degli spermi. La coevoluzione sessuale antagonistica prevede che quando una caratteristica modellata dal conflitto sessuale differisce tra popolazioni diverse, le femmine siano più resistenti ai maschi della propria popolazione, con cui si sono coevolute, rispetto a quelli di popolazioni diverse contro cui esse non hanno gli adattamenti necessari per resistere ad accoppiamenti non voluti. Questa previsione è stata confermata attraverso uno studio su maschi e femmine di popolazioni a diverso conflitto sessuale, in cui è stato dimostrato che femmine poste con maschi provenienti da una popolazione con un maggiore grado di conflitto sessuale hanno un minor controllo sul trasferimento degli spermi, rispetto a femmine che hanno avuto la possibilità di coevolvere con tali maschi. Infine uno studio comparativo fra popolazioni diverse indica l’esistenza di coevoluzione tra genitali maschili e femminili, che varia a seconda del grado di conflitto sessuale a cui le popolazioni sono soggette. Per cui l’evoluzione dei genitali sembra essere il risultato di una corsa agli armamenti tra maschi e femmine per il controllo della frequenza degli accoppiamenti e del successo di inseminazione.
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Mathisen, Maria Kristin. "Benefits of Multiple Mating in guppy (Poecilia reticulata)." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21411.

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Croft, Darren P. "The social organisation of the guppy (Poecilia reticulata)." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396602.

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Serena, Giovanna. "Aspetti cognitivi della scelta sessuale in Poecilia reticulata." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3425817.

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It is traditionally assumed by models of decision making that, when alternative options are evaluated, the value assigned to each option is absolute and independent on the others available, implying that choice is rational. In contrast, rationality of choice is frequently violated, and such irrationality seems to be the result of use of simple heuristics that enable us to choose quickly between options differing in multiple attributes (comparative evaluation). Over the past three decades, there has been much work on ways that people use simple heuristics in problem-solving tasks. Animals, however, also need to make choices in complex decision environments, facing constrains in time, energy and computational-cognitive capacity. Recent studies have found biases in animal behaviour that are similar to the kinds reported in humans, indicating that similar heuristic strategies are used in different species in solving similar problems. It has been suggested that decision heuristics based on comparative evaluation might operate as mate choice mechanisms. In many species, females base their mate choice on the simultaneous evaluation of multiple signals. Females are often faced with a simultaneous choice between two or more males, and it is possible for them to make comparisons among those males. Mate choice is a complex cognitive process that involves the evaluation of multiple stimuli integrated into a behavioral decision. Yet the cognitive processes whereby prospective mates are evaluated have been ignored, with a few exceptions. The aim of this study was to investigate how animals search for and evaluate prospective mates throwing light on the cognitive mechanisms underlying mate choice. In the first part I analyzed how female guppies (Poecilia reticulata), a freshwater fish widely used in sexual selection studies, made mating decisions when combining different male attributes. The results show that the mating system of P. reticulata may facilitate comparative mate evaluation and suggest that it may have profound effects on male mating strategy. For example, the attractiveness of a male will depend on the context in which he is compared and males are therefore expected to choose the more favorable context in which to court the female. Moreover, I tested the prediction that males may exploit female cognitive constraints of comparative evaluation adjusting their mating strategy on the base of the relative quality of their competitors. The results indicate that male guppies actively select the most favourable social context in which their attractiveness will be maximized relative to that of surrounding males. It remains still unknown whether the rationality of choice may influence the strategies adopted by males as well.
Molti modelli economici presuppongono che, nello scegliere tra diverse opzioni, gli esseri umani si comportino in modo razionale. Tuttavia la realtà risulta essere più complessa e spesso nel valutare diverse opzioni si ricorre ad euristiche basate sulla valutazione comparativa che, contrariamente a quanto atteso, possono portare a decisioni irrazionali. Gli studiosi di etologia, negli ultimi anni, si sono chiesti se anche gli animali, di fronte a più opzioni che variano per due o più caratteri non correlati tra loro, adottino una valutazione comparativa e siano quindi soggetti agli stessi limiti di razionalità degli esseri umani dimostrando di utilizzare strategie di scelta simili. Nella scelta del partner sessuale un animale spesso si trova a scegliere tra diverse opzioni -i potenziali partner- che possono differire per due o più caratteri e la scelta deve essere effettuata in modo rapido ed efficiente. Si può ipotizzare quindi che una valutazione di tipo comparativo possa essersi evoluta anche nel contesto della scelta sessuale. Tuttavia la ricerca fino ad ora in questo campo si è occupata quasi esclusivamente di identificare quali caratteri maschili vengano preferiti dalle femmine e i vantaggi selettivi che comportano mentre i meccanismi cognitivi implicati nella scelta e gli effetti dei limiti cognitivi sulla fitness dei maschi e delle femmine stesse sono stati finora sostanzialmente ignorati, con pochissime eccezioni. La presente ricerca si proponeva di indagare se nell’ambito della scelta del partner sessuale, i limiti cognitivi che guidano la scelta in Poecilia reticulata, un piccolo pesce di acqua dolce, siano gli stessi osservati nella nostra specie. I risultati suggeriscono che le femmine opererebbero una scelta non razionale in accordo con quanto ci si attende dall’utilizzo di strategie di tipo comparativo. Inoltre in risposta al comportamento di scelta femminile è stato osservato che i maschi sembrerebbero a loro volta in grado di modificare la loro strategia corteggiando la femmina in prossimità di quei maschi rispetto ai quali, se confrontati, risulterebbero più attraenti per assicurarsi un aumento del successo riproduttivo. Ulteriori studi saranno necessari per comprendere se vi siano dei criteri di razionalità anche nella scelta maschile.
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Barbosa, Miguel. "Female mating decisions in the Trinidadian guppy, Poecilia reticulata." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/767.

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Lopez, Silvia. "Parasite mediated sexual selection in the guppy (Poecilia reticulata)." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300130.

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Archard, Gabrielle Ann. "Context-dependent mating behaviour in the guppy, Poecilia reticulata." Thesis, University of Bristol, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437271.

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Shohet, Adam Joseph. "Mate choice and sexual selection in the guppy, Poecilia reticulata." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269307.

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Smith, Elizabeth Jane. "Ultraviolet vision and mate choice in the guppy, Poecilia reticulata." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390642.

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Books on the topic "Poecilia reticulata"

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Rokade, Pramod Baburao. Impacts of Tannery Operations on Guppy, Poecilia reticulata. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1.

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Rokade, Pramod Baburao Baburao. Impacts of Tannery Operations on Guppy, Poecilia reticulata. Springer, 2017.

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Cheng, Yun Yun. Sexual selection and the evolution of genitalia in the guppy (Poecilia reticulata). 2004.

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Book chapters on the topic "Poecilia reticulata"

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Rokade, Pramod Baburao. "Introduction." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 1–8. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_1.

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Rokade, Pramod Baburao. "Summary." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 43–44. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_10.

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Rokade, Pramod Baburao. "Conclusions." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 45. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_11.

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Rokade, Pramod Baburao. "Methodology." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 9–16. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_2.

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Rokade, Pramod Baburao. "Structure and Morphology of Testis in Control Group." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 17–20. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_3.

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Rokade, Pramod Baburao. "Structure and Morphology of Ovary in Control Group." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 21–23. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_4.

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Rokade, Pramod Baburao. "Structure and Morphology of Pituitary Gland in Control Group." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 25–28. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_5.

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Rokade, Pramod Baburao. "Effect of Tannery Effluent on Behavior of Fishes." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 29–31. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_6.

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Rokade, Pramod Baburao. "Effect of Tannery Operations on Testis." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 33–36. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_7.

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Rokade, Pramod Baburao. "Effect of Tannery Operations on Ovary." In Impacts of Tannery Operations on Guppy, Poecilia reticulata, 37–39. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_8.

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Conference papers on the topic "Poecilia reticulata"

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Marques, Estêvão Lengruber Rodrigues, Jandyr de Almeida Rodrigues, and Marcos Paulo Machado Thomé. "ALTERNATIVA AGROECOLÓGICA AO MANEJO ALIMENTAR DE Poecilia reticulata (PETERS, 1859) (CIPRINODONTIFORMES:POECILIDAE." In Simpósio de Saúde e Meio Ambiente. Congresse.me, 2022. http://dx.doi.org/10.54265/suef9793.

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Aguiar, Luiz H. M., Alexandre Zaghetto, Cauê Zaghetto, Celia Ghedini Ralha, and Flávio De Barros Vidal. "Demiourgos: Simulação Baseada em Agentes para Análise da Evolução de Camuflagem em Seres Vivos." In XII Simpósio Brasileiro de Sistemas de Informação. Sociedade Brasileira de Computação, 2016. http://dx.doi.org/10.5753/sbsi.2016.5950.

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O presente trabalho apresenta a modelagem e a implementação de um simulador baseado em agentes, aqui denominado Demiourgos, que permite observar o processo de evolução da camuflagem de organismos virtuais na presença de seus predadores. O estudo de caso desenvolvido foi inspirado na pesquisa de John A. Endler, onde foi observado como a seleção natural induz mudanças no padrão de cores nos peixes lebistes (Poecilia reticulata). O comportamento dos agentes foi modelado a partir de pesquisa por observação. Os resultados preliminares mostram que o modelo de agente proposto atinge níveis satisfatórios quando comparado ao trabalho utilizado como referência. A ferramenta de simulação pode principalmente ser utilizada por pesquisadores que precisam trabalhar com diversas variáveis para compreensão de modelos complexos de interação entre seres vivos, podendo auxiliar na tomada de decisão sobre problemas de conservação de espécies.
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Marushchak, Oleksii, Oksana Nekrasova, Volodymyr Tytar, Mihails Pupins, Andris Čeirāns, and Arturs Skute. "Distribution of Viviparous American Fish Species in Eastern Europe on the Example of Gambusia Holbrooki Girarg, 1859 and Poecilia Reticulata Peters, 1859 in the Context of Global Climate Change <sup>†</sup>." In 1st International Electronic Conference on Biological Diversity, Ecology and Evolution. Basel, Switzerland: MDPI, 2021. http://dx.doi.org/10.3390/bdee2021-09398.

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MARQUES, Luka, Ana Carolina PRADO-VALLADARES, and Érica Maria Pellegrini CARAMASCHI. "Primeiro inventário e estrutura taxonômica de peixes e crustáceos nos riachos da Serra da Carioca." In I Simpósio de bolsistas da FIPERJ. Fundação Instituto de Pesca do Estado do Rio de Janeiro - FIPERJ, 2022. http://dx.doi.org/10.57068/simposio.fiperj.354.

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O Parque Nacional da Tijuca (PNT) é uma Unidade de Conservação (UC) que abrange uma das maiores florestas urbanas reflorestadas do mundo e abriga as nascentes de 3 das principais micro-bacias do município do Rio de Janeiro. O presente projeto trata da caracterização taxonômica da sua ictiofauna e carcinofauna (camarões e caranguejos) no setor Serra da Carioca. Os organismos alvo foram coletados por meio de dois esforços: pesca de esforço e pesca elétrica e identificados ao menor nível taxonômico possível, medidos e pesados. Sendo assim, o objetivo deste trabalho é verificar se existe uma diferença significativa na composição das comunidades dos trechos inferiores e superiores de um mesmo riacho e entre bacias, verificando se há um gradiente altitudinal por trás disso. Para tal, utilizamos a composição de espécies alfa; beta, e os índices de diversidade de Shannon, Margalef e Simpson e Equabilidade. Foram coletados 3401 indivíduos pertencentes a 5 ordens, 6 famílias, 8 gêneros e 8 espécies. Em geral, os pontos da Bacia da Zona Sul apresentaram valor de Shannon = 0, e consequentemente, um baixíssimo grau de incerteza em relação à espécie a ser coletada. Entretanto, as Bacias da Baía de Guanabara e de Jacarepaguá apresentaram valores variando de 0 a 0,71, indicando possíveis diferenças entre as bacias. O índice de Simpson apresentou alta dominância na bacia da Zona Sul, enquanto que outros setores apresentaram valores variando entre 0 a 0,64. O padrão de maior abundância e diversidade de espécies em trechos mais inferiores do riacho se manteve em praticamente todos os pontos, exceto no Rio Carioca, onde o padrão é reverso e foram contabilizados zero indivíduos no trecho inferior. A riqueza total no setor somou 6 espécies, sendo peixes: Gymnotus pantherinus, Phalloceros harpagos, Trichomycterus sp1. e Poecilia reticulata, não-nativa; e crustáceos: o camarão, Macrobrachium potiuna.; e o caranguejo, Trichodactylus fluviatilis. Nas 3 microbacias, sua diversidade gama foi: Bacia da Baía de Guanabara (5 espécies), Bacia de Jacarepaguá (4 espécies) e Bacia da Zona Sul (5 espécies). Entre as demais microbacias a diversidade Beta variou de 0,2 a 1,0, sugerindo que há diferenças entre essas comunidades. Por fim, levando em conta proximidade urbana com esses riachos e os pontos de captações de água realizadas por moradores ou pela empresa Águas do Rio, sugerimos diante do nosso conjunto de dados uma reformulação das políticas de uso dos riachos desse setor.
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Adro’i, Hasan, Sucipto Hariyanto, Mahrus Ali, and Bambang Irawan. "Phenotype variation of guppy fish (Poecilia reticulate W. Peters, 1859) population from different quality of aquatic environments in Surabaya, Indonesia." In INVENTING PROSPEROUS FUTURE THROUGH BIOLOGICAL RESEARCH AND TROPICAL BIODIVERSITY MANAGEMENT: Proceedings of the 5th International Conference on Biological Science. Author(s), 2018. http://dx.doi.org/10.1063/1.5050124.

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