Mikael Sandell's research while affiliated with Lund University and other places

... Entre otros aspectos de su biología, la flexibilidad en el uso del espacio de machos y hembras de una especie en respuesta a la densidad total, o a la abundancia de un sexo en particular, tiene potenciales implicancias sobre el sistema de apareamiento de la población(Ishibashi y Saitoh 2008; Moorhouse y Macdonald 2005;.Numerosos estudios realizados en poblaciones de pequeños roedores durante el periodo reproductivo, evidencian que el tamaño y porcentaje de -34 -solapamiento de las áreas de acción, y el comportamiento territorial de los individuos, se hallan afectados por la densidad total o la densidad de machos y hembras de la población(Nelson 1995a,b; Bond y Wolff 1999;Hoset et al. 2008; Steinmann y Priotto 2011;Stradiotto et al. 2009).Las respuestas del tamaño y de los grados de solapamiento de las áreas de acción a la densidad poblacional son variables, y dependen en gran medida del sexo, edad, e interacciones comportamentales y relaciones de parentesco entre individuos(Lambin y Krebs 1993;Waterman 2007). En algunas especies de roedores, altos valores de densidad poblacional conducen a una disminución del tamaño del área de acción y del solapamiento intra e intersexual en el sexo no territorial(Ostfeld et al. , 1993Erlinge et al. 1990). Sin embargo, este patrón no es siempre observado; en individuos del sexo territorial, los tamaños y grados de solapamiento de las áreas de acción pueden resultar independientes de la densidad poblacional(Blondel et al. 2009;Sommaro et al. 2008;.Para mayor información sobre selección sexual, estrategias y sistemas de apareamiento consultarSteinmann y Bonatto (2015) ySteinmann y Grenat (2020). ...

... Elevated baseline populations of predators in the low phase of the prey cycle may subsequently limit cyclic amplitude in the prey population (Krebs et al. 2014). Moreover, negative feedback processes from predation in a cyclic system may also dampen prey fluctuations (Erlinge et al. 1983(Erlinge et al. , 1991. Ultimately, trophic cascades driven by increased scavenger abundance, survival, and fecundity are expected implications of providing anthropogenic food subsidies (Newsome et al. 2014). ...

... In this case, males can benefit from dispersal because this is likely to increase their access to females, decrease competition with resident dominant males, and avoid inbreeding with related females. In polygamous species where females are primarily responsible for parental care, not dispersing allows them to take advantage of their knowledge of local resources; when resources are available, they are more likely to share their home ranges with daughters, but they are less likely to allow the permanence of male offspring in order to avoid inbreeding (Waser and Jones 1983;Pusey and Packer 1987;Sandell 1989). In monogamous mammals, dispersal should be equally frequent in both sexes, and parents do not evict either sex, because fathers do not have to compete with their sons for the breeding female, and the breeding of female offspring does not incur any cost to the mother in populations that are not at carrying capacity (Dobson 1982;Liberg and von Schantz 1985). ...

... Indeed, many of the species are solitary and may coincide relatively rarely (Lukas & Clutton-Brock, 2013). While many of these species exploit polygynous matting patterns (Law & Mehta, 2018), solitary species are territorial, which may lead to overlap promiscuity (Sandell, 1986) or successive polygyny (Lodé, 2001), which perhaps reduces the pressure of pre-copulatory competition and choice. Second, SSD might not be a good proxy of pre-copulatory selection in Musteloidea. ...

... In keeping with this prediction, we found that animals that had more neighbors (higher social network degree) had smaller HRs. This pattern has also been documented in other taxa, including fence lizards (Scoular et al., 2011), field voles (Erlinge et al., 1990), and striped mice (Schradin et al., 2010). ...

... (Erlinge and Sandell, 1988) Playback experiment of two species on Tarmarin, in allopatry and sympatry. Pied tamarins are critically edangered and experiencing range fragmentation, while red-handed tamarins have expanded their range into the range of pied tamarins. ...

... Solitarily living species that have few social interactions except during mating and do not show cooperative behaviours (Sandell 1989) form the majority (80-95%) of carnivore species (Gittleman 1986). If a limiting resource is predictable in space and time and restricted to a constrained area, this leads to territorial defence (Hixon 1980), while unpredictability or variation leads to overlapping ranges or roaming tactics (Erlinge & Sandell 1986, Sandell 1989. In this way, Figure 6. ...

... However, empirical results are contradictory on the effect of temperature and precipitation on the cessation of breeding by individual females in many taxa (Chase, Nur, & Geupel, 2005;Gullett et al., 2013;Halupka, Dyrcz, & Borowiec, 2008;Husby, Kruuk, & Visser, 2009;Jacobs et al., 2013;Mcdermott & Degroote, 2016;Najmanova & Adamik, 2009;Rutschmann et al., 2016;Shine & Brown, 2008;Sinclair, SaR, & Arcese, 2000;Tokolyi, Schmidt, & Barta, 2014;Wells et al., 2016). In addition, it is well-known that breeding density and the traits of individuals can also influence the probability of multiparity and cessation of breeding (Eccard & Ylonen, 2003;Jankowiak & Wysocki, 2016;Leips & Travis, 1999;Nelson, Agrell, Erlinge, & Sandell, 1991;Reed et al., 2013;Williams, Lane, Humphries, Mcadam, & Boutin, 2014). For example, females that breed earlier, produce few offspring earlier in the year, or those with few prior breeding attempts may increase the number of breeding attempts or the probability of breeding more than once annually (Ogden & Stutchbury, 1996;Seward, Beale, Gilbert, Jones, & Thomas, 2014;Townsend et al., 2013;Verboven, Tinbergen, & Verhulst, 2001;Verboven & Verhulst, 1996;Weggler, 2006). ...

... Studies from Crump (1980), Brinck et al. (1983), and Crump and Moors (1985) identified 15 different chemical compounds in the anal sac secretions of mustelid predators. Some compounds were further classified as sulfurous metabolites derived from meat ingestion, which are characteristic volatile components from feces, urine, and anal gland secretions of several mammal predators (Crump and Moors 1985;Nolte et al. 1994). ...

... For males, on the other hand, it is in their interest to maximize the number of females encountered and must therefore adapt to their spatial distribution. They can use a mobile search strategy when females are dispersed, stay around the aggregations of females, or use a mixture of both (Sandell and Liberg, 1992). According to Sandell and Liberg (1992), the roaming tactic corresponds to males wandering in search of receptive females and competing for each opportunity. ...