Sôichi Yamane's research while affiliated with Ibaraki University and other places

Publications (23)

Article
In some Polistes wasps, the foundresses build huge nests during the founding phase to improve the thermal condition of these nests. This implies that Polistes wasps change their nesting manner in relation to ambient temperature. To test the hypothesis that nest size increases with latitude, colonies of Polistes chinensis were collected from 11 loca...
Article
Some chemical characteristics of oral secretions and larval silk, which contain proteinaceous substances, were analyzed in the nests of four Ropalidia species, R.fasciata, R. taiwana, R. rufocollaris and R. flavopicta, and two Polistes species, P. gigas and P. tenebrkosus. Nitrogen contents in pure oral secretions ranged between 13-14%, and crude p...
Article
Full-text available
The flight activities of the stingless bee Lepidotrigona hoozana and honeybee Apis cerana were studied diurnally and periodically to examine temporal and climactic foraging niche differentiation in Taiwan. Statistical analyses showed that the level of flight was correlated with the temperature and light intensity in both species. Both species could...
Article
Full-text available
Polybia scutellaris (White) builds large nests characterized by numerous spiny projections on the surface. In order to determine whether or not the nest temperature is maintained because of homeothermic conditions of the nest individuals or otherwise, we investigated the thermal conditions within the nests built by P. scutellaris. We measured the t...
Article
Six Ctenoplectra species are recorded from Southeast Asia and Taiwan. They are C. chalybea Smith, C. cornuta Gribodo, C. davidi Vachal, C. elsei Engel, C. sandakana sp. nov. and C. vagans Cockerell. Females of C. sandakana sp. nov. from North Borneo are similar to the mainland species C. chalybea, but differ mainly in the clypeal keel and the lengt...
Article
The thermal characteristics of a colony of Apoica flavissima, an epiponine wasp, were examined. The nest, with a diameter of slightly less than 30 cm, was built on a twig of an orange tree. The temperature of the roof surface fluctuated greatly, ranging between 19.1 and 41.5°C. However, the temperature in the central cell was kept constant at aroun...
Article
Full-text available
The thermal characteristics of mud nests of Polybia spinifex were investigated by measuring internal and surface temperatures of the nests. The nests had a layer of mud envelope and consisted of mud with fine sand particles. The envelope had a vertically long slit-like entrance hole. The mud nests had high thermal conductivities (0.51–0.56 W/(m°C))...
Article
Temperatures in 3 natural nests of the Taiwanese stingless bee Trigona (Lepidotrigona) ventralis hoozana were measured in Dapu and Tsaoshan, Chiayi County, Taiwan from Dec. 2002 to Mar. 2004. The temperature in the brood rearing zone of 2 nests was kept relatively constant in a range of 29-32°C. Even in the morning in Jan., the temperature in the b...
Article
A paper wasp that dwells in cold regions, Polistes riparius, shows a behavioral habit of building empty cells around the brood-rearing areas and elongating cells up to twice as long as the body length of pupae. We investigated the thermal effect of the number and the length of cells by using model nests with various numbers and lengths of cells. Th...
Article
Full-text available
Temperatures in two mature Polybia nests were measured to study the thermal conditions of nests. Temperatures in a Polybia paulista nest were measured when it had adult wasps (trial 1) and after the adult wasps were removed (trial 2), and temperatures in a P. occidentalis nest were measured when inhabited by adult wasps (trial 3). In each trial, C–...
Article
Full-text available
In social-insect colonies, cooperation among nestmates is generally stabilized by their high genetic similarity. Thus, fitness gained through cooperation drops quickly as the number of reproductive females (queens) increases. In this respect, wasps of the tribe Epiponini have attracted special attention, because the colonies have tens, or even hund...
Article
A polymorphic microsatellite locus was isolated and characterized from Polybia paulista, one of the most common polygynic, swarm-founding social wasps in Brazil. Three other microsatellite loci for which the primer sets were originally developed in independent-founding paper wasps also showed polymorphism in the size of amplification products in P....
Article
To examine morphological differences among queens, workers and males, 14 external body characters were measured in two colonies of the Taiwanese stingless bee Trigona ventralis hoozana. Queens were largest in all of the body parts measured except eye width and mesoscutum length, and values for most variables in queens did not overlap with those of...
Article
Comparisons of cuticular hydrocarbons between workers of the dulotic ant Polyergus samurai and its slave, Formica japonica, were carried out. Gas chromatography–mass spectrometry showed that the slave-maker and its slave shared the major cuticular hydrocarbon compounds, but possessed several minor products unique to each species. No difference in h...
Article
. Distribution patterns of the number of foundresses per newly established nest (foundress group size, FGS) of two primitively eusocial, independent-founding wasps, Ropalidia fasciata and R. plebeiana, were studied using zero-truncated distribution models. The distribution pattern of the FGS of R. fasciata is significantly different from a zero-tru...
Article
The cuticular hydrocarbons of a formicine ant, Formica japonica, were characterized by gas chromatography and gas chromatography-mass spectrometry. Variations in cuticular hydrocarbon profiles of two natural colonies of F. japonica collected in central Japan were compared in spring, summer and autumn through one active season. Principal component a...
Article
The numbers of first-batch eggs and workers (minims) in a carpenter ant Camponotus japonicus are not fixed but are regulated in response to various internal and external factors of founding queens. The initial body weight of founding queens was positively correlated with the number of minims. The amount of queen weight loss during the founding peri...
Article
Temperature characteristics in paper models of Polistes wasp nests with various numbers (N = 7, 19, 37, or 61 cells) and lengths (L = 10–50 mm) of cells were measured in the field. Temperature distribution in a N61L50 model showed that the central cell provided the best thermal conditions in terms of gained temperature and its fluctuation. The mean...
Article
Amino acid composition of the protein in the oral secretion, which is widely used for construction and maintenance of social wasp nests, was analyzed in preemergence nests of Polistes (Polistes) riparius. The kinds and proportion (%) of amino acids of the protein detected from nests of P. riparius were very similar to those of a consubgeneric speci...
Article
Some metric characters of nests built during the founding phase by foundresses were compared between two consubgenericPolistes wasps,P. (Polistes) riparius andP. (P.) chinensis, the former of which inhabit higher latitudes. Volumes and dry weights ofP. riparius nests were strikingly larger than those ofP. chinensis, even when standardized by the fo...
Article
Camponotus japonicus workers can discriminate nestmates from alien individuals. In the field, freeze-killed alien workers received significantly more attacks than nestmate carcasses. Gas chromatography (GC) analysis showed that the compositions of cuticular hydrocarbons of foraging workers from different colonies were the same, but the relative pro...

Citations

... In this study, the maximum difference in cell length among the locations was only 4 mm. However, even a 4-mm elongation may increase cell temperatures by 1°C when the nest receives solar radiation (Hozumi et al., 2008). ...
... Altering the extension of the distribution range of a native species (for example, enlarging it to the North). Influencing the consistency, life cycle, physiology (and behaviour, in case of animals) of a native species [6]. Making possible the establishment of alien species from distant territories enhancing, in some cases, their invasive potentiality. ...
... The use of mud for nest construction has an ecological advantage in that the hard mud nest is more resistant to destruction by vertebrate predators (O'Donnell and Jeanne 2002) and heavy rains (Richards 1978) than the paper nest. In the mud nests, the thermal conductivity (0.69 W/(m°C)) is much higher than those of paper nests (Hozumi et al. 2009); a paper envelope of a vespine nest is 0.08-0.20 W/(m°C) (Schmolz et al. 2000). ...
... Las reinas de muchos véspidos sociales, una vez apareadas, pasan la parte meteorológicamente adversa del año, coincidente con los primeros meses de su vida adulta, refugiadas en algún espacio que las proteja de las inclemencias del tiempo, y el azar dicta que a veces el refugio sea algún objeto que los medios de transporte humanos llevan luego, inadvertidamente, lejos del punto de origen. Esto trae como consecuencia, especialmente en los últimos tiempos, caracterizados por un enorme auge del transporte de mercancías y viajeros, que con cierta frecuencia se introduzca alguna especie de véspido fuera de su área nativa (Beggs et al., 2011;Castro et al., 2013), y concretamente dentro de los Vespinae se van acumulando ya un cierto número de introducciones; muchas veces éstas no desembocan en el asentamiento del véspido, como en el caso de Vespa orientalis Linnaeus, 1771 en Méjico (Dvořák , 2006) y Valencia, en España (Hernández et al., 2013), o el de Vespa simillima Smith, 1868 en Canadá (Kimsey & Carpenter, 2012) y Taiwán (Sung et al., 2006(Sung et al., y 2014, pero en ocasiones sí que han llevado al establecimiento de poblaciones en los países de acogida, por ejemplo con Vespa crabro Linnaeus, 1758 en Norteamérica (Archer, 2012), Vespa velutina Lepeletier, 1836 en Europa, Corea y Japón (Mazzei et al., 2018;Takeuchi et al., 2017) o Vespula germanica (Fabricius, 1793) en el Cono Sur de Sudamérica, Sudáfrica, Norteamérica, Australia, Nueva Zelanda y otros territorios insulares (Carpenter & Kojima, 1997). De los vespinos asentados en áreas no nativas, algunos (por ejemplo V. crabro en Norteamérica) no parecen tener un impacto grave en los territorios colonizados (Beggs et al., 2011), mientras que otros, como V. velutina en Europa y V. germanica en Nueva Zelanda, han evolucionado hasta la categoría de especies invasoras (el Convenio sobre la Diversidad Biológica (Secretariat of the Convention on Biological Diversity, 2019) define "especies invasoras" como aquellas "cuya introducción y/o diseminación fuera de su distribución natural, pasada o presente, constituye una amenaza para la diversidad biológica"). ...
... Also, nests of T. collina were mainly found in the bases of trees and usually in nest aggregations in previous studies (Eltz et al. 2003;Cameron et al. 2004), while most of the nests sampled here were underground and associated with active hypogeal ant and termite colonies. Nest characters of L. flavibasis reported here are consistent with other species within the L. ventralis complex, including L. hoozana (Sung et al. 2008), L. ventralis (Chinh et al. 2005), and L. arcifera (Vijayakumar 2014) in the main features, like the entrance tube, the presence of an involucrum, and the regularly arranged horizontal brood combs. Here, we reported nests of L. flavibasis and L. terminata in limestone hollows. ...
... As our collections were all made in the summer, we did not account for potential seasonal variability of N. vitripennis CHC profiles throughout the year. Generally, the degree of phenotypic plasticity and adaptability in CHC profiles of different insect taxa appears to be highly variable and species-dependent (Liu et al., 2001;Ingleby, 2015;Rajpurohit et al., 2021), though several case studies managed to demonstrate plastic variability of CHC profiles with seasonality (e.g. Rouault et al., 2004;Gefen et al., 2015;Rajpurohit et al., 2017). ...
... They hunt both beneficial insect pollinators and pest species, such as those in the orders Diptera and Hemiptera [14]. They have also been found to be a biological control for Polistes wasps [56]. We considered these elimination actions to be contentious due to the potential for negative ecological impact or harm to those proximal to the removal effort. ...
... The independent-founding Polistinae apply an "ant repellent" from their van der Vecht's gland to the pedicel of their nest (Dani et al. 1996; Espelie and Hermann 1990;Evans and Eberhard 1970; and rubbing activity appears to become more common when ants are present (Post and Jeanne 1981;). However, Kudo and Yamane (1996) found that pedicel rubbing behavior occurs in Polistes wasps even when ants are not present and it occurs at rates similar to those occurring in wild specimens from the same latitude where the lab wasps were obtained, suggesting that there is an inherited latitudinal effect on this behavior. Parapolybia indica foundresses rub the pedicel in close temporal association with departure from the nest and this association is more frequent prior to emergence of workers than after workers have emerged and are able to defend the nest while foragers were off of the nest . ...
... Wasps in the genus Apoica are unique among epiponines in that they neither construct an envelope nor nest in cavities. In nine of the ten species (exception, A. arborea de Saussure; see below), the single comb is provided with a thick (25 mm in A. flavissima (Yamane et al. 2009) felt-like mat of plant hairs above the brood cells. Two explanations of the function of this feature have been proposed (Yamane et al. 2009). ...
... The individuals were genotyped at four polymorphic microsatellite loci (PP52, Pbe128, Pc25, and Pc68; Kudô et al 2005b). PCR products were run on 8% native polyacrylamide gels and visualized using silver staining (Bassam et al 1991). ...