In crossmodal identification, a subject token identifies an item perceived in one sensory modality with an item perceived in another sensory modality. Does crossmodal identification always occur in cognition, or does crossmodal identification sometimes take place in perception? This paper argues that crossmodal identification occurs in cognition, and not in perception. Nevertheless, multisensory perception is not unalive to crossmodal identity. Experimental evidence demonstrates that perception is differentially sensitive to the identity of individuals presented to distinct senses. Such sensitivity enhances recognition (...) and improves action. This approach relies on distinguishing crossmodal identification from perceiving crossmodal identity. Perception registers crossmodal identity, but crossmodal identification as such belongs to thought. (shrink)

We can discern two opposing viewpoints regarding synesthesia. According to the first, it is an oddity, an outlier, or a disordered condition. According to the second, synesthesia is pervasive, driving creativity, metaphor, or language itself. Which is it? Ultimately, I favor the first perspective, according to which cross-sensory synesthesia is an outlying condition. But the second perspective is not wholly misguided. My discussion has three lessons. First, synesthesia is just one of a variety of effects in which one sense modality (...) causally impacts and reshapes experience associated with another. These effects are utterly common. However, due to their unfamiliarity, and to their conflict with a widespread conception of the role of the senses in perception and perceptual experience, until recently they have been surprising. Second, synesthesia nevertheless must be distinguished from other inter-modal effects that lead to misperception, such as crossmodal illusions. Third, synesthesia also may be distinguished from the potentially much broader class of synesthetic effects, which could be common across the population and within individuals. (shrink)

Perceptual malleability and diversity can stem from perceptual learning, expertise, genetics, disease, or accident. Perceptual malleability and diversity force us to reject the claim that perceptual capacities, perceptual experience, and perceptual content are universal across subjects and times. And it casts doubt on the presumption of a universal human perceptual nature. However, it does not directly challenge perceptual objectivity, understood as the claim that one can perceive a world of things and features that are independent from oneself and one's experiences (...) and that could be perceived by other subjects. (shrink)

This paper presents an account of the senses and what differentiates them that is compatible with richly multisensory perception and consciousness. According to this proposal, senses are ways of perceiving. Each sense is a subfaculty that comprises a collection of perceptual capacities. What each sense shares and what differentiates one sense from another is the manner in which those capacities are exercised. Each way of perceiving involves a distinct type of information gathering, individuated by the information it functions to extract (...) and the medium from which it does so. This approach distinguishes the project of characterizing and differentiating senses from that of attributing experiences to sensory modalities. Perceptual experiences are episodes in which perceptual capacities are exer- cised. Conscious perceptual episodes may be ascribed to distinct sensory modalities, according to the manners in which perceptual capacities are deployed on an occasion. According to this account, senses are not exclusive. First, their capacities may overlap. Second, perceptual episodes, including conscious experiences, may belong to multiple senses. Indeed, some episodes require the joint use of several senses. In this account, subjects have only limited first-person knowledge of the senses they employ. (shrink)

It is tempting to think that one’s perceptual evidence comprises just what issues from perceiving with each of the respective sensory modalities. However, empirical, rational, and phenomenological considerations show that one’s perceptual evidence can outstrip what one possesses due to perceiving with each separate sense. Some novel perceptual evidence stems from the coordinated use of multiple senses. This paper argues that some perceptual evidence in this respect is distinctively multisensory.

Casey O’Callaghan has argued that rather than hearing meanings, we hear phonemes. In this note I argue that valuable though they are in an account of speech perception – depending on how we define ‘hearing’ – phonemes either don’t explain enough or they go too far. So, they are not the right tool for his criticism of the semantic perceptual account (SPA).

I offer an account of the experience of acting that demonstrates how agentive aspects of experience associated with the execution of intentions are richly integrated with perceptual aspects associated with parts of action taking place in the publicly observable world. On the view I elucidate, the experience of acting is often both an engagement with the world and a type of intimate acquaintance with it. In conscious action the agent consciously intervenes in the world and consciously experiences the world she (...) is changing. In section one, I discuss extant accounts of the experience of acting, noting deficiencies. In sections two and three, I develop my own account, drawing on Casey O’Callaghan’s work on multi-modal perception. In the conclusion, I discuss ramifications for psychology and philosophy. (shrink)

Is the flavor of mint reducible to the minty smell, the taste, and the menthol-like coolness on the roof of one’s mouth, or does it include something over and above these—something not properly associated with any one of the contributing senses? More generally, are there features of perceptual experiences—so-called novel features—that are not associated with any of our senses taken singly? This question has received a lot of attention of late. Yet surprisingly little attention has been paid to the question (...) of what it means to say that a feature is associated with a sensory modality in the first place. Indeed, there is only one fully developed proposal in the literature, due to Casey O’Callaghan. I argue that this proposal is too permissive to inform the debate over novel features. I go on to argue that all attempts to formulate a better proposal along these lines fail. The corollary of my arguments is that the question of the existence of novel features is poorly formed. Furthermore, the problem generalizes, with the result that we should not rely on our pre-theoretical notions of the senses as the basis of theorizing about the features of perceptual experiences. (shrink)

Suppose that you are at a live jazz show. The drummer begins a solo. You see the cymbal jolt and you hear the clang. But in addition seeing the cymbal jolt and hearing the clang, you are also aware that the jolt and the clang are part of the same event. Casey O’Callaghan (forthcoming) calls this awareness “intermodal feature binding awareness.” Psychologists have long assumed that multimodal perceptions such as this one are the result of a subpersonal feature binding (...) mechanism (see Vatakis and Spence, 2007, Kubovy and Schutz, 2010, Pourtois et al., 2000, and Navarra et al., 2012). I present new evidence against this. I argue that there is no automatic feature binding mechanism that couples features like the jolt and the clang together. Instead, when you experience the jolt and the clang as part of the same event, this is the result of an associative learning process. The cymbal’s jolt and the clang are best understood as a single learned perceptual unit, rather than as automatically bound. I outline the specific learning process in perception called “unitization,” whereby we come to “chunk” the world into multimodal units. Unitization has never before been applied to multimodal cases. Yet I argue that this learning process can do the same work that intermodal binding would do, and that this issue has important philosophical implications. Specifically, whether we take multimodal cases to involve a binding mechanism or an associative process will have impact on philosophical issues from Molyneux’s question to the question of how active or passive we consider perception to be. (shrink)

Intellectual humility can be broadly construed as being conscious of the limits of one’s existing knowledge and capable to acquire more knowledge, which makes it a key virtue of the information age. However, the claim “I am (intellectually) humble” seems paradoxical in that someone who has the disposition in question would not typically volunteer it. There is an explanatory gap between the meaning of the sentence and the meaning the speaker ex- presses by uttering it. We therefore suggest analyzing intellectual (...) humility semantically, using a psycholexical approach that focuses on both synonyms and antonyms of ‘intellectual humili- ty’. We present a thesaurus-based methodology to map the semantic space of intellectual hu- mility and the vices it opposes as a heuristic to support philosophical and psychological anal- ysis of this disposition. We performed the mapping both in English and German in order to test for possible cultural differences in the understanding of intellectual humility. In both lan- guages, we find basically the same three semantic dimensions of intellectual humility (sensi- bility, discreetness, and knowledge dimensions) as well as three dimensions of its related vic- es (self-overrating, other-underrating and dogmatism dimensions). The resulting semantic clusters were validated in an empirical study with English (n=276) and German (n=406) par- ticipants. We find medium to high correlations (0.54-0.72) between thesaurus similarity and perceived similarity, and we can validate the labels of the three dimensions identified in the study. But we also find indications of the limitations of the thesaurus methodology in terms of cluster plausibility. We conclude by discussing the importance of these findings for construct- ing psychometric scales for intellectual humility. (shrink)

Do we perceptually experience meanings? For example, when we hear an utterance of a sentence like ‘Bertrand is British’ do we hear its meaning in the sense of being auditorily aware of it? Several philosophers like Tim Bayne and Susanna Siegel have suggested that we do (Bayne 2009: 390, Siegel 2006: 490-491, 2011: 99-100). They argue roughly as follows: 1) experiencing speech/writing in a language you are incompetent in is phenomenally different from experiencing speech/writing you are competent in; 2) this (...) contrast is best explained by the fact that we experience meanings in the latter case, but not the former. In contrast, in an important recent discussion Casey O’Callaghan has argued that we do not (O’Callaghan 2011). He responds to the above contrast argument by claiming that this phenomenal contrast is instead best explained by the fact that we hear language-specific phonological properties in the latter case, but not in the former. In this paper I argue that O’Callaghan’s response to the popular contrast argument is too limited in scope, provide a more general response, and present a new case against experiencing meanings. (shrink)

According to perceptualism, fluent comprehension of speech is a perceptual achievement, in as much as it is akin to such high-level perceptual states as the perception of objects as cups or trees, or of people as happy or sad. According to liberalism, grasp of meaning is partially constitutive of the phenomenology of fluent comprehension. I here defend an influential line of argument for liberal perceptualism, resting on phenomenal contrasts in our comprehension of speech, due to Susanna Siegel and Tim Bayne, (...) against objections from Casey O'Callaghan and Indrek Reiland. I concentrate on the contrast between the putative immediacy of meaning-assignment in fluent comprehension, as compared with other, less ordinary, perhaps translation-based ways of getting at the meaning of speech. I argue this putative immediacy is difficult to capture on a non-perceptual view (whether liberal or non-liberal), and that the immediacy in question has much in common with that which applies in other, less controversial cases of high-level perception. (shrink)

This article offers a reply to commentaries from Amy Kind, Casey O’Callaghan, and Wayne Wu. It features a defense and further analysis of perceptual malleability, as defended in _Thinking and Perceiving_. In turn, it considers the consequences of malleability for attention and the cognitive penetrability of perception, imagination and perceptual skills, and perceptual content and objectivity.

The hard problem of consciousness is the problem of explaining how and why physical processes give rise to consciousness (Chalmers 1995). Regardless of many attempts to solve the problem, there is still no commonly agreed solution. It is thus very likely that some radically new ideas are required if we are to make any progress. In this paper we turn to quantum theory to find out whether it has anything to offer in our attempts to understand the place of mind (...) and conscious experience in nature. In particular we will be focusing on the ontological interpretation of quantum theory proposed by Bohm and Hiley (1987, 1993), its further development by Hiley (Hiley and Callaghan 2012; Hiley, Dennis and de Gosson 2021), and its philosophical interpretation by Pylkkänen (2007, 2020). The ontological interpretation makes the radical proposal that quantum reality includes a new type of potential energy which contains active information. This proposal, if correct, constitutes a major change in our notion of matter. We are used to having in physics only mechanical concepts, such as position, momentum and force. Our intuition that it is not possible to understand how and why physical processes can give rise to consciousness is partly the result of our assuming that physical processes (including neurophysiological processes) are always mechanical. If, however, we are willing to change our view of physical reality by allowing non-mechanical, organic and holistic concepts such as active information to play a fundamental role, this, we argue, makes it possible to understand the relationship between physical and mental processes in a new way. It might even be a step toward solving the hard problem. (shrink)

This paper addresses the problem of sound individuation (SI) and its connection to sound ontology (SO). It is argued that the problems of SI, such as aspatiality, extreme individuation, indexical perplexity and duration puzzles are due to SO’s uncertainties. Besides, I describe the views in SO, including the wave view (WV), the property view (PV), and the event view (EV), as Casey O’Callaghan defends it. According to O’Callaghan, EV offers clear standards to individuate sounds. However, this claim is (...) countered by the consideration that any view could also defend the standards in SO, and thus, EV does not solve any of the problems mentioned above. As a way of showing the difficulties inherited by sound’s inner ontology, the problem of its linguistic representation is also addressed. The problem of SI can be developed within the frame of the philosophy of language and, specifically, regarding the discussion about mass vs count-­sortal terms. Is the term sound a mass or a count­-sortal? It is shown that, for reasons pertaining SO, the decision regarding the case of sound as a mass or count-­sortal term remains open. SI is, thus, covered from the SO to the philosophy of language. (shrink)

In this seventh book of scilogs collected from my nest of ideas, one may find new and old questions and solutions, referring to different scientific topics – email messages to research colleagues, or replies, notes about authors, articles, or books, so on. -/- Exchanging ideas with Akeem Adesina A. Agboola, Muhammad Akram, Octavian Blaga, Said Broumi, Kajal Chatterjee, Vic Christianto, Octavian Cira, Mihaela Colhon, B. Davvaz, Luu Quoc Dat, R. Dhavaseelan, Jean Dezert, Hoda Esmail, Reza Farhadian, Ervin Goldfain, Muhammad Gulistan, (...) Yanhui Guo, Keli Hur, Saeid Jafari, W. B. Vasantha Kandasamy, J. Kim, J.G. Lee, Xinde Li, P. K. Lim, R. K. Mohanty, Mumtaz Ali, To Santanu Kumar Patro, Xu Peng, Dmitri Rabounski, Nouran Radwan, A.A. Salama, Musavarah Sarwar, Ganeshsree Selvachandran, Le Hoang Son, Selçuk Topal, Andrușa Vătuiu, Ștefan Vlăduțescu, Xiaohong Zhang.‬‬‬. (shrink)

Upon first hearing sinewaves, all that can be discerned are beeps and whistles. But after hearing the original speech, the beeps and whistles sound like speech. The difference between these two episodes undoubtedly involves an alteration in phenomenal character. O’Callaghan (2011) argues that this alteration is non-sensory, but he leaves open the possibility of attributing it to some other source, e.g. cognition. I discuss whether the alteration in phenomenal character involved in sinewave speech provides evidence for cognitive phenomenology. I (...) defend both the existence of cognitive phenomenology and the phenomenal contrast method, as each concerns the case presented here. (shrink)

As noted by philosopher Robert Pasnau, “Our standard view of sound is incoherent” at best (Pasnau, 1999, p 309). A quick perusal of how we discuss and represent sound in our day-to-day language readily highlights several inconsistencies. Sound might be described roughly as emanating from the location of its material source (the ‘crack of the snare drum over there’ distal theory), as a disruption somewhere in the space in-between the sounding object and the listener (the ‘longitudinal compression waves in the (...) air’ medial theory), located with the hearer (the ‘inner sensations’ proximal theory), or perhaps entirely devoid of spatial characteristics (aspatial theory). Beyond these topographic ruminations on the location of sounds, more profound disagreements arise around what sorts of things sounds are. A broad array of theories treat sounds as events, as object-like particulars that travel through space, as properties of their sounding objects, etc., with many subtle ontological variations springing up along the way. -/- The philosophical plot further thickens as we expand from defining the ontology and spatial position of simple primary sounds to the phenomenon of echoes, with some theories arguably faring better than others. The focus here will be on Casey O’Callaghan’s formulation of sounds as disturbance events that bind primary sounds and their echoes together as one (O’Callaghan, 2007a, pp 126-127). In short, the claim is that echoes are identical to their associated primary sound and are not distinct sounds in their own right. Described as the ‘Primary Sound Account of Echoes’ (‘PSAE’) in Gregory Fowler’s ‘Against the Primary Sound Account of Echoes,’ the intricacies of this particular aspect of O’Callaghan’s theory of a primary sound’s connection to its echo bears considerably upon the workability of distal theories of sound in general (Fowler, 2013, p 466). -/- In this paper, I expand upon Fowler’s work by demonstrating additional instances where the PSAE fails to hold when subjected to increased scrutiny across a broader range of echo scenarios, presenting a significant issue for proponents of distal theories of sound. (shrink)

RESUMO A alimentação é o fator que mais onera um sistema de produção animal. Assim, a utilização de diferentes estratégias de alimentação dos animais ainda é o grande desafio da nutrição animal, principalmente, levando em consideração as exigências nutricionais de diferentes categorias de ruminantes, em especial bovinos em regiões tropicais, haja vista que a sazonalidade na produção de forragens afeta diretamente a produção bovina, promovendo inadequação no atendimento das exigências nutricionais dos animais principalmente em minerais e vitaminas. Uma alimentação que (...) não atenda as exigências nutricionais dos ruminantes gera prejuízos no sistema de produção, além de, em casos mais graves, ocasionar a perda do animal. Estudos que abordam o efeito e a importância de vitaminas e minerais na nutrição bovina são escassos e necessários. Recentemente a National Research Council (NRC) apresentou novos registros das exigências nutricionais das vitaminas e minerais. Essas alterações proporcionam um impacto econômico significativo em relação à nutrição animal. Nesse sentido, objetivou-se com esta revisão trazer informações acerca de vitaminas e minerais na nutrição de bovinos em pastejo. -/- Palavras-chave: Alimentação animal; forragem; pastagem; requerimentos nutricionais; ruminantes; vitaminas lipossolúveis (Source: AGROVOC). -/- ABSTRACT Animal feed is the factor that most burdens a production system. Thus, the use of different animal feeding strategies is still the great challenge of animal nutrition, taking into account the nutritional requirements of different categories of ruminants, especially cattle in tropical regions, given that seasonality in forage production directly affects cattle production, promoting inadequacy in meeting the nutritional requirements of animals, mainly in minerals and vitamins. A diet that does not meet the nutritional requirements of ruminants generates losses in the production system, in addition to, in more serious cases, causing the loss of the animal. Studies that address the effect and importance of vitamins and minerals in bovine nutrition are scarce and necessary. Recently the National Research Council (NRC) presented new records of the nutritional requirements of vitamins and minerals. These changes provide a significant economic impact on animal nutrition. In this sense, the objective of this review was to bring information about vitamins and minerals in the nutrition of grazing cattle. -/- Keywords: Animal feeding; fat soluble vitamins; forage; nutritional requirements; pasture feeding; ruminants (Source: AGROVOC). -/- REFERÊNCIAS BIBLIOGRÁFICAS -/- 1. Cavalcanti CPL, Silva e Macedo TJ, Gois GC, Menezes VG, Monte APO, Silva AD, Silva DJM, Silva EO, Araújo GGL, Rodrigues RTS, Wischral A, Matos MHT, Queiroz MAA. 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A review of vitamin D and its importance to the health of dairy cattle. J Dairy Res. 2020; 87:84–87. 50. Alves EM, Pedreira MS, Santana CA, Silva FF. Nutrição vitamínica de vacas leiteiras. Pubvet. 2008; 2:1-17. 51. Jiang Q, Lin L, Xie F, Jin W, Zhu W, Wang M, et al. Metagenomic insights into the microbe-mediated B and K2 vitamin biosynthesis in the gastrointestinal microbiome of ruminants. Microb. 2022; 10:1-16. 52. Magan JB, O’Callaghan TF, Zheng J, Zhang L, Mandal R, Hennessy D, et al. Effect of diet on the vitamin B profile of bovine milk-based protein ingredients. Foods. 2020; 9:1-17. 53. Pinedo LA, Berenchtein B, Selem ASMA. Estudo dos processos bioquímicos da fermentação, degradação e absorção de nutrientes dos alimentos em ruminantes. Pubvet. 2008; 2:1-10. 54. DA SILVA, Emanuel Isaque Cordeiro. Formulação e Avaliação de Suplemento Mineral Para Caprinos. Instrução Técnica Para o Produtor Rural de Pernambuco, v. 3, n. 1, p. 1-4, 2023. 55. DA SILVA, Emanuel Isaque Cordeiro. 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Presented at Philosophy Across Disciplines Conference 2021, Newcastle University. -/- As noted by philosopher Robert Pasnau, “our standard view of sound is incoherent” at best. A quick perusal of how we discuss and represent sound in our day-to-day language readily highlights a number of inconsistencies. Sound might be described roughly as emanating from the location of its material source (the ‘crack of the snare drum over there’ distal theory), as a disruption somewhere in the space in-between the sounding object and (...) the listener (the ‘longitudinal compression waves in the air’ medial theory), located with the hearer (the ‘inner sensations’ proximal theory), or perhaps as devoid of spatial characteristics at all (aspatial theory). Beyond these topographic ruminations on the location of sounds, even deeper disagreements arise around just what sorts of things sounds are. A broad array of theories treat sounds as events, as object-like particulars that travel through space, as properties of their sounding objects, etc.—with many subtle ontological variations springing up along the way. The philosophical plot further thickens as we expand from defining the ontology and spatial position of simple primary sounds through to the phenomenon of echoes, with certain theories arguably faring better than others. We’ll focus here on Casey O’Callaghan’s formulation of sounds as disturbance events which bind primary sounds and their echoes together as one. In short, the claim that echoes are identical to their associated primary sound and are not distinct sounds in their own right. Described as the ‘Primary Sound Account of Echoes’ (‘PSAE’) in Gregory Fowler’s “Against the Primary Sound Account of Echoes,” the intricacies of this particular aspect of O’Callaghan’s theory of a primary sound’s connection to its echo bears greatly upon the workability of distal theories of sound in general. What I seek to achieve in this presentation is to illustrate how O’Callaghan’s PSAE fails when subjected to increased scrutiny across a broader range of echo scenarios, which in turn presents a significant issue for proponents of distal theories of sound. (shrink)

I argue against the Primary Sound Account of Echoes (PSAE) – the view that an echo of a sound just is that sound. I then argue that if my case against PSAE is successful, distal theories of sound are false. The upshot of my arguments, if they succeed, is that distal theories are false. Towards the end, I show how some distal theories can be modified to avoid this conclusion and note some open questions to which the modified theories give (...) rise. (shrink)

A longstanding philosophical tradition holds that the primary objects of hearing are sounds rather than sound sources. In this case, we hear sound sources by—or in virtue of—hearing their sounds. This paper argues that, on the contrary, we have good reason to believe that the primary objects of hearing are sound sources, and that the relationship between a sound and its source is much like the relationship between a color and its bearer. Just as we see objects in seeing their (...) colors, so we hear sound sources in hearing their sounds. (shrink)

Higher animals need to identify and track material objects because they depend on interactions with them for nutrition, reproduction, and social interaction. This paper investigates the perception of material objects. It argues, first, that material objects are tagged, in all five external senses, as bearers of the features detected by them. This happens through a perceptual process, here entitled Generalized Completion, which creates the appearance of objects that have properties that transcend the activation of sensory receptors. The paper shows, secondly, (...) that material objects are privileged subjects for perceived motion and interaction. That is, they are perceived as subjects for these properties while their parts seem to be subjects only derivatively. Material objects are the only perceptual subjects that are both multisensory and privileged. (shrink)

Higher animals need to identify and track material objects because they depend on interactions with them for nutrition, reproduction, and social interaction. This paper investigates the perception of material objects. It argues, first, that material objects are tagged, in all five external senses, as bearers of the features detected by them. This happens through a perceptual process, here entitled Generalized Completion, which creates the appearance of objects that have properties that transcend the activation of sensory receptors. The paper shows, secondly, (...) that material objects are privileged subjects for perceived motion and interaction. That is, they are perceived as subjects for these properties while their parts seem to be subjects only derivatively. Material objects are the only perceptual subjects that are both multisensory and privileged. (shrink)

There are writers in both metaphysics and algorithmic information theory (AIT) who seem to think that the latter could provide a formal theory of the former. This paper is intended as a step in that direction. It demonstrates how AIT might be used to define basic metaphysical notions such as *object* and *property* for a simple, idealized world. The extent to which these definitions capture intuitions about the metaphysics of the simple world, times the extent to which we think the (...) simple world is analogous to our own, will determine a lower bound for basing a metaphysics for *our* world on AIT. (shrink)

RESUMO A inseminação artificial (IA) é a biotecnologia mais empregada com vantagens superiores em relação a utilização da monta natural, cuja eficácia se dá na larga escala de reprodução entre os bovinos. Associando essa biotécnica com hormônios pode-se estabelecer manipulações do sistema reprodutivo da fêmea, levando a manejos de inúmeras cabeças de gado para inseminar a um tempo fixo. Portanto, foram realizados 5 protocolos de IATF, tendo 2 categorias de animais: nulíparas e multíparas. No protocolo 1 foram submetidas 81 multíparas, (...) resultando em 47 animais prenhes; No protocolo 2 foram protocoladas 103 animais multíparas, no qual resultou em 51 prenhes; já o protocolo 5 foram submetidas 77 animais multíparas, no qual resultou em 36 animais prenhes. Cada serviço realizado foi matematicamente calculado, sendo o ponto de partida o escore corporal, bem estar animal e a técnica bem exercida. Desta forma obteve bons resultados na (IATF) , no qual destaca-se o percentual : o protocolo 1 obteve 58,02%, o protocolo 2 obteve 49,51% na taxa de prenhez, No protocolo 3 obteve 55,67% na taxa de prenhez, o protocolo 4 obteve 53,33% de prenhes, já o protocolo 5 resultou em 46,75% de prenhez. O uso das biotecnologias da reprodução, realizadas em bovinos de corte, obteve resultado dentro do descrito pela literatura consultada. A boa taxa de prenhes apresentada na IATF deveu-se ao bom controle hormonal do ciclo estral e da qualidade do sêmen utilizado. A taxa de prenhez dos animais que foram submetidos à monta natural foi baixa pelo fato de que os reprodutores não conseguiram cobrir todas as fêmeas. ABSTRACT The artificial insemination (AI) is the most used biotechnology with superior advantages in relation to the use of natural mounting, whose effectiveness is given in the large scale of reproduction among cattle. Associating this biotechnique with hormones it is possible to establish manipulations of the reproductive system of the female, leading to managements of numerous heads of cattle to inseminate at a fixed time. Therefore, 5 IATF protocols were performed, having 2 categories of animals: nulliparous and multiparous. In protocol 1, 81 multiparous animals were submitted, resulting in 47 pregnant animals; in protocol 2, 103 multiparous animals were submitted, resulting in 51 pregnancies; and in protocol 5, 77 multiparous animals were submitted, resulting in 36 pregnant animals. Each service performed was mathematically calculated, with the starting point being the body score, animal welfare and the well exercised technique. Thus obtained good results in the (IATF), which highlights the percentage: protocol 1 obtained 58.02%, protocol 2 obtained 49.51% in pregnancy rate, in protocol 3 obtained 55.67% in pregnancy rate, protocol 4 obtained 53.33% pregnant, and protocol 5 resulted in 46.75% pregnant. The use of the reproduction biotechnologies, performed in beef cattle, obtained results within the described by the consulted literature. The good pregnancy rate presented in the IATF was due to the good hormonal control of the estrous cycle and the quality of the semen used. The pregnancy rate of animals that were subjected to natural mating was low due to the fact that the sires could not cover all the females. Keywords: Hormones. Cattle Pregnancy Rate. Artificial Insemination in Cattle. Hormones in Cattle Reproduction. -/- REFERÊNCIAS BIBLIOGRÁFICAS AMBRÓSIO, P. H. et al. Ressincronização da ovulação em programas de IATF: novas estratégias. 2018. BARUSELLI, P. S.; GIMENES, L. U.; SALES, J. N. de S. Fisiologia reprodutiva de fêmeas taurinas e zebuínas. Revista Brasileira de Reprodução Animal, v. 31, n. 2, p. 205-211, 2007. BARUSELLI, P. S. et al. Evolução e perspectivas da inseminação artificial em bovinos. Revista Brasileira de Reprodução Animal, v. 43, n. 2, p. 308-314, 2019. BÓ, G. A. et al. Alternative programs for synchronizing and resynchronizing ovulation in beef cattle. Theriogenology, v. 86, n. 1, p. 388-396, 2016. BOTTINO, M. P. et al. Effects of eCG and FSH in timed artificial insemination treatment regimens on estrous expression and pregnancy rates in primiparous and multiparous Bos indicus cows. Animal Reproduction Science, v. 228, p. 106751, 2021. DA SILVA, Emanuel Isaque Cordeiro. Técnica da Inseminação Artificial em Bovinos: Manejo Passo a Passo. 2020. DA SILVA, Emanuel Isaque Cordeiro. Reprodução Animal: Inseminação Artificial. 2020. DA SILVA, Emanuel Isaque Cordeiro. Fisiologia da Reprodução Animal: Ovulação, Controle e Sincronização do Cio. 2020. DA SILVA, Emanuel Isaque Cordeiro. Fisiologia da Reprodução de Bovinos Leiteiros: Aspectos Básicos e Clínicos. Emanuel Isaque Cordeiro da Silva, 2022. KRAUS, Beth M.; PARENTE, Eric J.; TULLENERS, Eric P. Laryngoplasty with ventriculectomy or ventriculocordectomy in 104 draft horses (1992–2000). Veterinary Surgery, v. 32, n. 6, p. 530-538, 2003. MONGELLI, Melissa Sanches; TAVARES, Izabel Cristina; FERRANTE, Marcos. Evolução e premissas dos protocolos hormonais de inseminação artificial em tempo fixo na pecuária. Ciência Animal, v. 31, n. 1, p. 119-133, 2021. VILELA, G. C. Protocolos de IATF em novilhas precoce e super precoce. 2021. (shrink)