Homosexual behavior in feedlot steers: An aggression hypothesis

Klemm, W. R.; Sherry, C. J.; Schake, L. M.; Sis, R. F.

doi:10.1016/0304-3762(83)90127-x

Cited by 24 publications

(25 citation statements)

References 5 publications

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“…Además, es más frecuente en animales juveniles que en adultos, y en individuos domésticos y en cautiverio que en animales libres (11) . La homosexualidad en rumiantes machos puede estar asociada a muchos factores, tales como la dominancia social (12) , la edad (13) , o el ambiente social durante el desarrollo (14) , pudiendo también ser inducida por disturbios ambientales (11) .…”

Section: Introductionunclassified

“…En algunos casos, el comportamiento homosexual puede implicar un problema importante desde el punto de vista productivo, como sucede con el "síndrome de buller" en los novillos, donde algunos individuos son sistemáticamente montados por otros (12,15) . En condiciones de feed-lot, algunos autores estudiaron la frecuencia de este comportamiento entre más de 5 millones (16) de animales y cerca de 80.000 en otro trabajo (17) , y coinciden en que algo más del 2 % de los animales presentaron el "síndrome de buller".…”

Section: Introductionunclassified

“…Se reportó que la mortalidad puede llegar al 1 % (16) , y que estos animales se agotan al ser montados en forma reiterada, pierden pelo y presentan inflamaciones y traumas en la grupa y la cola, pudiendo en casos extremos sufrir fracturas de huesos (18) . Adicionalmente, se planteó la hipótesis de que el "síndrome de buller" en bovinos se vincula al establecimiento de la jerarquía social entre machos (12) .…”

Section: Introductionunclassified

“…In some cases, homosexual behavior constitutes an important productive problem, as happens with the "Buller syndrome" (riding behavior) in steers (12,15) . Some authors studied the frequency of this behavior, in which some animals are systematically mounted by others in feed-lot conditions, in more than 5 million individuals (16) in one study and in 80 thousand in another (17) .…”

Section: Introductionmentioning

confidence: 99%

“…Besides, homosexual behavior is more frequent in young individuals than in adults and in domesticated animals living in captivity than in those free in the wild (11) . Homosexuality in male ruminants can be associated to several factors, such as social dominance (12) , age (13) , the social environment during growth (14) , but it can also be induced by environmental disruptions (11) .…”

Section: Introductionmentioning

confidence: 99%

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Comportamiento homosexual en rumiantes machos. Revisión

Freitas‐de‐Melo

Lacuesta

Ungerfeld

2014

RMCP

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RESUMENEn varias especies de rumiantes, tanto domésticos como silvestres, se ha reportado la existencia del comportamiento homosexual entre los machos. El objetivo de esta revisión fue sintetizar la información disponible sobre las diferencias neuroendocrinas entre individuos homo y heterosexuales, y la relación entre la presencia del comportamiento homosexual y la concentración de esteroides sexuales. A su vez, se presenta información que vincula el comportamiento homosexual con la dominancia social, la edad, el ambiente social durante el desarrollo, y los disturbios ambientales. También se analiza como varía el comportamiento homosexual de acuerdo a la estacionalidad reproductiva. Además, se incluye información original sobre la estacionalidad del comportamiento homosexual en carneros domésticos, y de machos de cabra montesa, y su vínculo con la secreción de testosterona. Otro aspecto discutido es el "síndrome de buller" en novillos, individuos que son sistemáticamente montados por otros, y algunos de los factores asociados con la ocurrencia de este síndrome. En síntesis, el comportamiento homosexual en los rumiantes machos tiene un origen etiológico diverso, estando algunos aspectos aún poco estudiados, por lo que toda interpretación debe ser considerada con cautela, siendo por lo tanto un campo de estudio a profundizar. PALABRAS CLAVE: Comportamiento sexual, Núcleo sexual dimórfico, Orientación sexual, Síndrome de buller, Testosterona, Ungulados. ABSTRACTIn several male ruminants, including both, domestic and wild species, it has been reported the presence of homosexual behaviour between males. The aim of this review was to summarize the information about neuroendocrinological differences between homo and heterosexual individuals, and the relationship between homosexual behaviour and sexual steroid concentration. Moreover, we present information that link homosexual behavior with social dominance, age, social environment during the developmental period, and environment disturbances. Therefore, we include information about other physiologic aspects, such as reproductive seasonality, including unpublished information about seasonal changes in domestic rams and captive male Iberian ibex, and the relationship between seasonal changes in testosterone and behaviour. Other topic discussed is the "buller syndrome", which is commonly observed in steers, in which is observed that some males are repeatedly mounted by others males. In brief, homosexual behaviour in male ruminants is multietiologic, and some aspects are understudied, so the interpretation may be cautiously considered before deep studies are developed.

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Section: Introductionunclassified

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comportamiento homosexual en rumiantes machos. Revisión

Freitas‐de‐Melo

Lacuesta

Ungerfeld

2014

RMCP

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Courtship behavior among musk‐ox males kept in confinement

Reinhardt

1985

Zoo Biology

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During twelve 2-h observation sessions courtship behavior was recorded among seven musk-ox males (Ovibos mschatus) kept in a paddock together with six females. The animals were sexually mature and of the same age. Foreleg kicking and genital sniffing were more common than mounting. All three activities were of a nonaggressive nature but were shown almost exclusively by dominants toward subordinate partners. Assuming the role of courted females, recipients were never the target of aggressive acts.It was concluded that courtship among mature musk-ox males functions as a nonaggressive reinforcement of dominance, promoting low-risk coexistence of males.

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Non-conceptive Sexual Behavior in Cetaceans: Comparison of Form and Function

Ham,

Lilley,

Manitzas Hill

2023

Sex in Cetaceans

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Non-conceptive sexual behavior (NCSB) is phylogenetically widespread, having been documented in 35 of the 87 extant cetacean species, but function and form of NCSB have not been studied in comparative manner. Many cetacean species engage in NCSB across a wide variety of settings and contexts (e.g., play, sexual, affiliative). NCSB includes both social and non-social sexual behaviors, such as non-social masturbation on the environment or social same-sex thrusting toward a conspecific, but importantly, none of the behavior described as NCSB affords reproduction. While these two general categories encompass all sexual actions, the behaviors are diverse depending on species, social structure, and sex of the individual being observed. Social sexual behavior presumably has individual or social benefits. This chapter organizes what is known about NCSB in cetaceans by summarizing NCSB repertoires from peer-reviewed literature and discussing proposed functions (e.g., practice for reproduction, attracting opposite-sex mates, reducing the reproductive opportunities of same-sex conspecifics, reinforcing dominance relationships, alliance formation, reconciliation, and social tension reduction). Further, the form or behavioral repertoire, the sex of the individuals engaging in NCSB, the environment observed in, and whether NCSB was present or absent in general are noted from each of the articles reviewed. Overall, NCSB behavior observed across species shares similar elements (e.g., thrusting, lateral presentations) in both Mysticeti and Odontoceti. NCSB tends to be more prevalent among sexually immature compared to sexually mature individuals. Additionally, NCSB is more prevalent between male conspecifics compared to females when animals engage in same-sex NCSB. Interspecific NCSB has also been reported for a number of species. While most reports come from toothed whales, the limited observations of baleen whales have also found that many species engage in NCSB, making it likely that NCSB is included in the behavioral repertoire of most cetacean species. NCSB likely aids in forming and maintaining social relations and/or in the development of sexual repertoires in cetaceans, not unlike what has been proposed for primates. We hope this chapter sparks interest in comparative studies of NCSB and sheds light on the similarities of NCSB across species.

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Homosexual behavior in feedlot steers: An aggression hypothesis

Cited by 24 publications

References 5 publications

Comportamiento homosexual en rumiantes machos. Revisión

Comportamiento homosexual en rumiantes machos. Revisión

Courtship behavior among musk‐ox males kept in confinement

Non-conceptive Sexual Behavior in Cetaceans: Comparison of Form and Function

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