To see the other types of publications on this topic, follow the link: Interspecific copulation.
Journal articles on the topic 'Interspecific copulation'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 31 journal articles for your research on the topic 'Interspecific copulation.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Costa, Fernando G., and Gabriel Francescoli. "Analyse expérimentale de l'isolement reproductif entre deux espèces jumelles et sympatriques d'araignées : le Lycosa thorelli (Keyserling) et le Lycosa carbonelli Costa et Capocasale." Canadian Journal of Zoology 69, no. 7 (July 1, 1991): 1768–76. http://dx.doi.org/10.1139/z91-246.
Full textAbstract:
Four experimental groups were used: (A) males Lycosa thorelli × female L. thorelli; (B) male Lycosa carbonelli × female L. carbonelli; (C) Male L. thorelli × female L. carbonelli; (D) male L. carbonelli × female L. thorelli. Males were placed in a field with conspecific sexual pheromone and confronted to anesthetized virgin females. Male L. thorelli showed a greater tenacity than male L. carbonelli in the maintenance of the copulatory position. The typical copulation pattern (intraspecific groups) became atypical in interspecific groups. Only one typical interspecific copulation was observed in group C. Male L. carbonelli showed a good specific discrimination when mounting the female, while male L. thorelli showed a low discrimination level. The maintenance of the copulatory position could be determined by a modal number of ejaculations in the case of male L. carbonelli and by a modal duration in the case of male L. thorelli. Atypical copulations might indicate a mechanical incompatibility between the genitalia of the two species. Typical copulations produced offspring, indicating the absence of postcopulatory isolation mechanisms.
2
Seymour, N. R. "Forced copulation in sympatric American black ducks and mallards in Nova Scotia." Canadian Journal of Zoology 68, no. 8 (August 1, 1990): 1691–96. http://dx.doi.org/10.1139/z90-249.
Full textAbstract:
Observations of primarily identifiable wild black ducks and mallards provided qualitative and quantitative descriptions of interactions within and between intraspecific, interspecific, and heterospecific pairs throughout the breeding season. The study was carried out in a watershed on the St. Lawrence estuary shore of Nova Scotia from 1972 to 1988. Attempted forced copulation and forced pair copulation were rare among black ducks at any time throughout the breeding period. Only two apparently successful forced copulations were observed. Territorial males chased both female black ducks and mallards, and these chases appeared motivated by hostility. Males that had left their mates/territories did not attempt forced copulation with other females. Females sometimes avoided strange males, particularly when they returned to territories from their nests. Paired males rarely approached females with broods. Male mallards chased both female mallards and black ducks, and did not appear to discriminate between species when attempting forced copulation. Male mallards were more persistent and vigorous in their chases than black ducks, and they attempted forced copulation, whether with black ducks or mallards, more frequently than male black ducks did. Apparently successful forced copulation between a male mallard and female black duck occurred on three occasions.
3
Whitehead, Paul F. "Extraspecific copulation in Coleoptera." Entomologist's Gazette 71, no. 4 (October 30, 2020): 292–94. http://dx.doi.org/10.31184/g00138894.714.1784.
Full textAbstract:
Interspecific, intergeneric and interfamilial copulation in Coleoptera are rarely observed and even more rarely photographed in the wild. Records are summarised and two new observations from Cyprus and England are documented and illustrated.
4
Wiwegweaw, Amporn, Keiichi Seki, Hiroshi Mori, and Takahiro Asami. "Asymmetric reproductive isolation during simultaneous reciprocal mating in pulmonates." Biology Letters 5, no. 2 (January 13, 2009): 240–43. http://dx.doi.org/10.1098/rsbl.2008.0714.
Full textAbstract:
The generality of asymmetric reproductive isolation between reciprocal crosses suggests that the evolution of isolation mechanisms often proceeds in reciprocal asymmetry. In hermaphroditic snails that copulate simultaneously and reciprocally, asymmetry in premating isolation may not be readily detectable because the failure of the symmetric performance of courtship would prevent copulation from occurring. On the other hand, through their prolonged copulation, snails discriminate among mates when exchanging spermatophores for their benefit and thus may exhibit asymmetric reproductive isolation during interspecific mating. However, no clear case of reciprocal asymmetry has been found in reproductive isolation between snail species. Here we show a discrete difference in hybridization success between simultaneous reciprocal copulations between two species of pulmonate snails. Premating isolation of Bradybaena pellucida (BP) and Bradybaena similaris (BS) is incomplete in captivity. In interspecific copulation, BP removes its penis without transferring a spermatophore, while BS sires hybrids by inseminating BP. Thus, ‘male’ BP or ‘female’ BS rejects the other individual, while female BP and male BS accept each other, so that the two sexes of either BP or BS oppose each other in mate discrimination. Our results are a clear example of asymmetry in reproductive isolation during simultaneous reciprocal mating between hermaphroditic animals.
5
JUNG, SUNGHOON, IZYASLAV M. KERZHNER, and SEUNGHWAN LEE. "Species of the genus Eurydema (Hemiptera: Heteroptera: Pentatomidae) in Far East Asia: An integrated approach using morphological, molecular, and data crossing analyses for taxonomy." Zootaxa 2917, no. 1 (June 14, 2011): 48. http://dx.doi.org/10.11646/zootaxa.2917.1.3.
Full textAbstract:
In a revision of four previously described species of the genus Eurydema in Far East Asia, we confirm only two species, one of which consists of two subspecies: E. dominulus (Scopoli 1763) [= E. pulchra (Westwood 1837), syn. nov.], E. gebleri gebleri Kolenati 1846, and E. gebleri rugosa Motschulsky 1861 [stat. nov.]. In order to prove the above taxonomic changes, we focused on three major analyses; (1) morphological study (color patterns), (2) molecular identification (DNA barcording) and (3) cross–breeding (inter–specific copulation, fertilization). The results of these analyses were sufficient to confirm the new taxonomic changes. According to the cross–breeding analysis, interspecific copulation between males of E. dominulus (= E. pulchra) and females of E. g. gebleri or E. g. rugosa occurs in nature, but the eggs laid by the interspecific copulation were unfertilized. Two subspecies, E. g. rugosa and E. g. gebleri, preserve their own unique coloration patterns; this was confirmed by the results of intra–subspecific copulation and breeding. However, the 1 st progeny from the inter–subspecific copulation of E. g. rugosa♂ X E. g. gebleri♀ (or E. g. gebleri♂ X E. g. rugosa♀) were confirmed to have the coloration patterns inherited from E. g. gebleri.
6
Kyogoku, Daisuke, and Teiji Sota. "Does heterospecific seminal fluid reduce fecundity in interspecific copulation between seed beetles?" Journal of Insect Physiology 72 (January 2015): 54–60. http://dx.doi.org/10.1016/j.jinsphys.2014.11.009.
Full text
7
D'Eon, Robert G., Norman R. Seymour, and Arnold H. Boer. "Black duck – mallard behavioural interactions in relation to hybridization." Canadian Journal of Zoology 72, no. 8 (August 1, 1994): 1517–21. http://dx.doi.org/10.1139/z94-200.
Full textAbstract:
Black duck (Anas rubripes) numbers have declined over the past several decades in conjunction with a gradual eastward range expansion of the mallard (Anas platyrhynchos). Introgressive hybridization has been proposed as a principal cause of this decline. We studied a sympatric population of black ducks and mallards to determine the relative contribution of forced copulation and mixed pairs to hybrid production and test the common belief that mallards are more aggressive than black ducks. Mixed pairs (14% of all pairs), not interspecific forced copulation, likely accounted for the 2% hybridization rate on the study area. Sexual and hostile aggression was greater among mallards than black ducks prior to the establishment of territories, but thereafter was similar between the two species.
8
Drosopoulos, S. "Acoustic Communication and Mating Behaviour in the Muellerianella Complex (Homoptera - Delphacidae)." Behaviour 94, no. 1-2 (1985): 183–201. http://dx.doi.org/10.1163/156853985x00334.
Full textAbstract:
AbstractSome data on acoustic communication and mating behavior of two biparentally reproducing species and the clonally reproducing pseudogamous "species" of the genus Muellerianella are reported. Although bioacoustic differences were found in the calling songs between the species, these did not prevent pairforming. Also, differences in mating behavior, such as pre-copulation behavior, courtship activities, frequency and duration of copulation were not sufficient to prevent successful hybridization between both the two biparentally reproducing species and between each of these two species and the pseudogamous "species". The data reported here are related to other biological differences reported previously. According to these data there is some evidence that differences in acoustic communication and mating behavior between the two species are established by ecological influences which in turn have established analogous physiological requirements. These differences are rather weak isolating mechanisms. Regarding the behavioral relation of the pseudogamous species with males of the two parental species it was found that these females behave exactly as the females of M. fairmairei with which they coexist in the field. In interspecific crosses mechanical barriers to copulation are more efficient than courtship differences. Finally it is assumed that pseudogamy is a strong isolation mechanism between the not yet fully genetically differentiated bisexual species of Muellerianella.
9
Wethington, Amy R., Deborah L. Kirkland, and Robert T. Dillon. "Sex Bias in Interspecific Copulation between the Hermaphroditic Freshwater Snails,Physa acutaandP. pomilia(Physidae)." American Malacological Bulletin 30, no. 2 (July 2012): 281–85. http://dx.doi.org/10.4003/006.030.0207.
Full text
10
Dupuis, Julian R., Kevin A. Judge, Bryan M. T. Brunet, Shawna Ohlmann Chan, and Felix A. H. Sperling. "Does hunger lead to hybridization in a genus of sexually cannibalistic insects (Orthoptera: Prophalangopsidae)?" Biological Journal of the Linnean Society 131, no. 2 (August 18, 2020): 434–48. http://dx.doi.org/10.1093/biolinnean/blaa094.
Full textAbstract:
Abstract Allochronic isolation can be a strong mechanism for reproductive isolation and speciation. However, imperfect allochrony and the expression of phenological plasticity can erode temporal barriers to gene flow and result in hybridization between divergent lineages. Here, we combine behavioural ecology and genomics to investigate this scenario in two closely related species of grigs in the genus Cyphoderris. These species exhibit a unique mating system whereby females feed on the fleshy hind wings of the male during copulation, and copulation with conspecific males is more likely in food-restricted females than in well-fed females. In western Canada, Cyphoderris buckelli and Cyphoderris monstrosa are sympatric but largely allochronically separated, with C. buckelli breeding earlier. However, their breeding seasons can overlap, leading to potential for older C. buckelli females to mate with young C. monstrosa males to obtain resources via sexual cannibalism. We used behavioural assays to test whether female feeding status affects the propensity for interspecific mating between C. buckelli females and C. monstrosa males. We then tested for hybridization and gene exchange in wild populations of both species, using morphology, mitochondrial DNA and genome-wide nuclear markers. We found that interspecific courtship and mating can occur, but the relationship between food restriction and increased propensity for hybridization was not significant. Although we observed intraspecific population genetic structure in both species, we found no signatures of hybridization in the morphological or genetic datasets, which suggests that postmating reproductive barriers might be preventing successful hybridization in the wild.
11
Özgül-Siemund, Alev, and Dirk Ahrens. "Taxonomic utility of female copulation organs in Sericini chafers (Coleoptera, Scarabaeidae), with special reference to asymmetry." Contributions to Zoology 84, no. 2 (August 4, 2015): 167–78. http://dx.doi.org/10.1163/18759866-08402005.
Full textAbstract:
Female genitalia are widely underrepresented in taxonomic studies. Here we investigate the morphological variation among female copulation organs for a group of scarab beetles (Sericini) with similar ecology, external morphology and copulation mechanics. We examined traits qualitatively and quantitatively based on 80 and 18 species (genus Pleophylla), respectively. Additionally we explored whether female genitalia are affected by asymmetry. The vast diversity of slerotised structures including their shapes illustrated the high taxonomic and phylogenetic utility of female genitalia in this group. The morphometric analysis of Pleophylla, confirmed that sclerotisations in the ductus bursae are very suitable for species-level taxonomic purposes. Stable interspecific variation is more hardly discernable in other parts such as the vaginal palps (shape and size) or the other membranous structures such as the shape of the bursa copulatrix. Asymmetric genitalia that arose multiple times independently among insects are found in most of the examined Sericini species. Asymmetries regarded either the bursa copulatrix, or both the bursa copulatrix and ductus bursae and comprised sclerotised and non-sclerotised structures being most common in modern Sericini. Here, highly asymmetric sclerotised structures are linked with strong asymmetry of the male copulation organs. Widespread asymmetry among megadiverse Sericini with a complex male-female genital asymmetry suggests that the shift to asymmetry is phylogenetically rather conserved. From the range of hypotheses, sexual selection seems to be the most reasonable to explain the evolution and stability of asymmetry in chafer genitalia.
12
CIVETTA, ALBERTO, and ELLIOTT J. F. CANTOR. "The genetics of mating recognition between Drosophila simulans and D. sechellia." Genetical Research 82, no. 2 (April 2003): 117–26. http://dx.doi.org/10.1017/s0016672303006360.
Full textAbstract:
During courtship, visual and chemical signals are often exchanged between the sexes. The proper exchange of such signals ensures intraspecific recognition. We have examined the genetic basis of interspecific differences in male mating behaviour and pheromone concentration between Drosophila simulans and D. sechellia by using Drosophila simulans/D. sechellia introgression lines. Our results show a majority of quantitative trait loci (QTLs) explaining variation in both male mating behaviour and pheromone concentration to be located on the third chromosome. One QTL found on the third chromosome explains variation in time needed to start courtship and copulation as well as time spent courting. The position of such QTL (approximately 84A–88B) with effects on courtship and copulation aspects of mating includes the candidate sex determination gene doublesex (84E5–6) and Voila (86E1–2), a gene that affects male courtship in D. melanogaster. One additional third chromosome QTL explained variation in 7-tricosene pheromone concentrations among males. The interval mapping position of this QTL (approximately 68E–76E) did not overlap with the position detected for differences in mating behaviour and the intervals did not include candidate genes previously identified as having an effect on D. melanogaster cuticular hydrocarbon production. We did not detect any directionality of the effect of Drosophila sechellia allele introgressions in male mating recognition.
13
Gapon, D. A. "An instance of intergeneric copulation in the family Rhopalidae (Heteroptera): structure, functioning and congruence of the genitalia in two different species from the standpoint of the lock-and-key hypothesis." Zoosystematica Rossica 28, no. 1 (March 7, 2019): 3–18. http://dx.doi.org/10.31610/zsr/2019.28.1.3.
Full textAbstract:
n event of mating between specimens of Corizus hyoscyami and Rhopalus parumpunctatus, registered in the Novgorod Province of Russia is considered. The structure of the aedeagi in their completely inflated state and the female genitalia, as well as the functioning of the genitalia, are described and illustrated. The process of unfolding and swelling of the aedeagi is traced using the method of hydraulic inflation of the membranous parts with glass microcapillaries. The congruence of the genitalia is discussed for each species, and also for the interspecific crosses in both combinations of sexes and species. Structures of insect terminalia are divided into three groups according to their functions: 1) auxiliary structures; 2) structures providing the mutual fixation of the genitalia; and 3) structures directly performing the function of transferring seminal fluid. It is shown that in the considered variants of interspecific crosses, the parts of the genitalia belonging to the second group have almost the same structure and functioning, and most likely cannot perform the function of structural isolation. The structures of the third group have taxon-specific morphological and functioning traits and a high degree of congruence within each species. Schemes of the functioning of the genitalia in interspecific crosses, speculatively showing the impossibility of normal insemination, are proposed.
14
Kimani, Susan W., and William A. Overholt. "Biosystematics of the Cotesia flavipes complex (Hymenoptera: Braconidae): interspecific hybridization, sex pheromone and mating behaviour studies." Bulletin of Entomological Research 85, no. 3 (September 1995): 379–86. http://dx.doi.org/10.1017/s0007485300036117.
Full textAbstract:
AbstractMating behaviour, sex pheromone attraction and reciprocal breeding of Cotesia flavipes Cameron (Hymenoptera: Braconidae), C. sesamiae (Cameron) and C. chilonis (Matsumura) were studied. These three putative species comprise the Cotesia flavipes complex. Wing fanning and antennal vibration were the initial courtship signals from the males. Antennal stroking by the male was also an important contact signal and a prerequisite to successful mounting and copulation. Interspecific crosses revealed that males of C. flavipes exhibited courtship behaviour, and mounted and copulated with females of C. chilonis and C. sesamiae; the males transferred sperm but progeny from these crosses did not include females. Males of C. sesamiae copulated with females of C. chilonis and the progeny included viable females. The progeny backcrosses of the hybrid females to male parents also included viable females. Sex pheromone experiments were conducted in a Y-tube olfactometer and in large field cages. Males and females of C. flavipes perceived and responded to odours emitted by the opposite sex. There was no significant response to odours from conspecific individuals of the same sex in any of the three species. Pheromone bioassays in field cages using sticky traps baited with live virgin C. flavipes females attracted conspecific males.
15
Vergilov, Vladislav, and Yurii V. Kornilev. "Injuries reflecting intra- and interspecific interactions in the Snake-eyed Skink Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833) (Squamata, Scincidae) from Bulgaria." Herpetozoa 32 (August 23, 2019): 171–75. http://dx.doi.org/10.3897/herpetozoa.32.e37735.
Full textAbstract:
The Snake-eyed Skink’s intra- and inter-specific interactions and their impacts on the individual (e.g. injuries) have received little attention so far. As part of copulation, male lizards bite the females; observations confirm an old report that bites occur in the fore side of the body, along with more recently published information about the back side. Additionally, out of 435 individuals observed in situ, 10 had missing extremities (toes, ankles, etc.); however, further studies should identify the causes of such injury, e.g. male-male combat, predators. For the first time, an adult male was observed biting a juvenile ex situ; the specific reasons, however, remain unknown. This report should generate further interest in ecological and behavioral studies, assessing the costs and benefits to potential territorial defense, intra-specific combat, and predator pressure and escape mechanisms.
16
Herrmann, Michael, and Sara Helms Cahan. "Inter-genomic sexual conflict drives antagonistic coevolution in harvester ants." Proceedings of the Royal Society B: Biological Sciences 281, no. 1797 (December 22, 2014): 20141771. http://dx.doi.org/10.1098/rspb.2014.1771.
Full textAbstract:
The reproductive interests of males and females are not always aligned, leading to sexual conflict over parental investment, rate of reproduction and mate choice. Traits that increase the genetic interests of one sex often occur at the expense of the other, selecting for counter-adaptations leading to antagonistic coevolution. Reproductive conflict is not limited to intraspecific interactions; interspecific hybridization can produce pronounced sexual conflict between males and females of different species, but it is unclear whether such conflict can drive sexually antagonistic coevolution between reproductively isolated genomes. We tested for hybridization-driven sexually antagonistic adaptations in queens and males of the socially hybridogenetic ‘J’ lineages of Pogonomyrmex harvester ants, whose mating system promotes hybridization in queens but selects against it in males. We conducted no-choice mating assays to compare patterns of mating behaviour and sperm transfer between inter- and intra-lineage pairings. There was no evidence for mate discrimination on the basis of pair type, and the total quantity of sperm transferred did not differ between intra- and inter-lineage pairs; however, further dissection of the sperm transfer process into distinct mechanistic components revealed significant, and opposing, cryptic manipulation of copulatory investment by both sexes. Males of both lineages increased their rate of sperm transfer to high-fitness intra-lineage mates, with a stronger response in the rarer lineage for whom mating mistakes are the most likely. By contrast, the total duration of copulation for intra-lineage mating pairs was significantly shorter than for inter-lineage crosses, suggesting that queens respond to prevent excessive sperm loading by prematurely terminating copulation. These findings demonstrate that sexual conflict can lead to antagonistic coevolution in both intra-genomic and inter-genomic contexts. Indeed, the resolution of sexual conflict may be a key determinant of the long-term evolutionary potential of host-dependent reproductive strategies, counteracting the inherent instabilities arising from such systems.
17
Naretto, Sergio, Cecilia S. Blengini, Gabriela Cardozo, and Margarita Chiaraviglio. "Pre- and Postcopulatory Traits ofSalvatorMale Lizards in Allopatry and Sympatry." Scientifica 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/8176267.
Full textAbstract:
The reproductive traits of males are under influence of sexual pressures before and after copulation. The strength of sexual selection varies across populations because they undergo varying competition for mating opportunities. Besides intraspecific pressures, individuals seem to be subjected to pressures driven by interspecific interactions in sympatry. Lizards may vary their reproductive strategies through varying sexual characters, body size, gonadal investment, and sperm traits. We evaluated the reproductive traits, involved in pre- and postcopulatory competition, in allopatric and sympatric populations ofSalvatorlizards. We observed a spatial gradient of male competition among populations, with the following order: allopatric zone ofS. rufescens; sympatric zone; and allopatric zone ofS. merianae. Accordingly, variation in secondary sexual character, the relative testis mass, and the length of sperm component was observed between allopatry and sympatry in each species, suggesting differences in the investment of reproductive traits. However, we found that these twoSalvatorspecies did not differ in secondary sexual characters in sympatry. Interestingly, the trade-off between testes and muscle varied differently from allopatry to sympatry between theseSalvatorspecies, suggesting that the influence of social context on reproductive traits investment would affect lizard species differently.
18
Mo, Matthew, and David Waterhouse. "Copulation, interspecific aggression and other observed behaviours in a breeding pair of Australian Eurasian Coots Fulica atra australis on a small urban wetland." Australian Field Ornithology 37 (2020): 100–104. http://dx.doi.org/10.20938/afo37100104.
Full text
19
Павлюченко, Наталья Георгиевна, Светлана Ивановна Мельникова, Наталия Ивановна Зимина, and Ольга Ивановна Колесникова. "Use of a growth inductor in grape nursery." Magarach Vinogradstvo i Vinodelie, no. 1(111) (March 18, 2020): 10–14. http://dx.doi.org/10.35547/im.2020.22.1.002.
Full textAbstract:
Целью исследований являлось выявление влияния различных концентраций стимулятора роста, элиситорного типа на регенерационные процессы, рост и развитие привитых виноградных саженцев. Работа выполнялась на сортах межвидового происхождения: Каберне северный, Денисовский, Цветочный, Станичный, Черный жемчуг, Памяти Смирнова, Баклановский. Копуляционные срезы обрабатывали различными концентрациями биостимулятора Эмистим. Наблюдения и исследования проводились по общепринятым в виноградарстве методикам. Обработка копуляционных срезов раствором Эмистима концентрацией 5х10, 1х10 и 1,5х10 приводит к стимулированию регенерационных процессов на этапе стратификации прививок. Образование прочной спайки обеспечивает послепосадочную адаптацию растений в полевых условиях и, соответственно, оказывает положительное влияние на рост, развитие и выход привитых виноградных саженцев. Сорта Каберне северный, Памяти Смирнова и Баклановский наиболее восприимчивы к обработке сверхмалыми дозами биостимулятора Эмистим. The aim of the study was to identify the effect of different concentrations of an elicitor type growth stimulant on the regeneration processes, growth and development of grafted grape seedlings. The work was carried out on varieties of interspecific origin: ‘Cabernet Severnyi’, ‘Denisovskiy’, ‘Tsvetochnyi’, ‘Stanichnyi’, ‘Chernyi Zhemchug’, ‘Pamyati Smirnova’ and ‘Baklanovskiy’. The copulation sections were treated with the biostimulant Emistim of different concentrations. Solutions of Emistim at 5x10, 1x10 and 1.5x10 stimulate the regeneration processes at the stage of the stratification of the grafts. The formation of a strong graft union ensures post-planting adaptation of plants in the field, with a positive effect on the growth, development and output of grafted vine seedlings. The ‘Cabernet Severnyi’, ‘Pamyati Smirnova’ and ‘Baklanovskiy’ varieties are the most susceptible to the ultra-low doses of the biostimulant Emistim.
20
Munroe, Daphne M., and Takashi Noda. "Spatial pattern of rocky intertidal barnacle recruitment: comparison over multiple tidal levels and years." Journal of the Marine Biological Association of the United Kingdom 89, no. 2 (March 2009): 345–53. http://dx.doi.org/10.1017/s0025315408003160.
Full textAbstract:
Recently developed methods allow quantification and examination of point patterns. Understanding patterns of aggregation or regularity of larval recruits at various spatial scales can help in identifying underlying ecological and biological processes determining their distribution. A rocky shore plot (30 cm wide × 100 cm tall) in southern Hokkaido, Japan was cleared each summer. Barnacle (Chthamallus challengeri) recruitment, after a period of approximately 134 days, was recorded using 40 photographs (25 cm2); 8 photographs per 20 cm horizontal band of tidal height, 5 bands total. Barnacle recruits within each photograph were mapped and co-ordinates used to analyse aggregation at scales from 0–2 cm using Ripley's K statistic and neighbourhood density function (NDF) (both models assumed heterogeneity of first-order density). Quadrat density counts at scales from 20–50 cm provided estimates of aggregation using Morisita's standardized index. These analyses showed that barnacle recruits demonstrate ordered spacing up to a distance of 6 mm. From 6 mm to 2 cm recruits show random spacing based on NDF, but ordered distribution based on the Ripley's K statistic. This discrepancy is likely a result of the cumulative nature of the Ripley's K statistic. At larger scales, Morisita's standardized index indicated aggregation. This result may be explained biologically by the trade off between maximizing need for space at small spatial scales, however being constrained by copulation with neighbours, resulting in aggregation at scales larger than the maximum penis length. The observed pattern was consistent among years with different recruitment densities and among tidal levels, indicating site specific characteristics and interspecific interactions may have a larger influence than desiccation stress or density dependence on spacing of recruits.
21
Sun, Di-Bing, Jie Li, Yin-Quan Liu, David W. Crowder, and Shu-Sheng Liu. "Effects of reproductive interference on the competitive displacement between two invasive whiteflies." Bulletin of Entomological Research 104, no. 3 (February 13, 2014): 334–46. http://dx.doi.org/10.1017/s0007485314000108.
Full textAbstract:
AbstractReproductive interference is one of the major factors mediating species exclusion among insects. The cryptic species Middle East-Asia Minor 1 (MEAM1) and Mediterranean (MED) of the whitefly Bemisia tabaci complex have invaded many parts of the world and often exhibit niche overlap and reproductive interference. However, contrasting patterns of competitive displacement between the two invaders have been observed between regions such as those in USA and China. Understanding the roles of reproductive interference in competitive interactions between populations of the two species in different regions will help unravel other factors related to their invasion. We integrated laboratory population experiments, behavioural observations and simulation modelling to investigate the role of reproductive interference on species exclusion between MEAM1 and MED in China. In mixed cohorts of the two species MEAM1 always excluded MED in a few generations when the initial proportion of MEAM1 was ⩾0.25. Even when the initial proportion of MEAM1 was only 0.10, however, MEAM1 still had a higher probability of excluding MED than that for MED to exclude MEAM1. Importantly, we show that as MEAM1 increased in relative abundance, MED populations became increasingly male-biased. Detailed behavioural observations confirmed that MEAM1 showed a stronger reproductive interference than MED, leading to reduced frequency of copulation and female progeny production in MED. Using simulation modelling, we linked our behavioural observations with exclusion experiments to show that interspecific asymmetric reproductive interference predicts the rate of species exclusion of MED by MEAM1. These findings not only reveal the importance of reproductive interference in the competitive interactions between the two invasive whiteflies as well as the detailed behavioural mechanisms, but also provide a valuable framework against which the effects of other factors mediating species exclusion can be explored.
22
Mair, Magdalena, Nicole Seifert, and Joachim Ruther. "Previous Interspecific Courtship Impairs Female Receptivity to Conspecifics in the Parasitoid Wasp Nasonia longicornis But Not in N. vitripennis." Insects 9, no. 3 (September 1, 2018): 112. http://dx.doi.org/10.3390/insects9030112.
Full textAbstract:
Interspecific sexual interactions are not uncommon in animals. In sympatry, females often face the risk of accidentally mating with a heterospecific male. Based on the actual risks imposed by the environment at a given time and place, females should be able to adjust their mate acceptance in order to avoid interspecific copulations as well as accidentally refusing to mate with a conspecific. We investigate the ability of females of the two parasitoid wasp species Nasonia vitripennis (Nv) and N. longicornis (Nl) to adjust their mate acceptance in response to previous unsuccessful courtship by heterospecific males. We show that Nl females are more reluctant to mate with a conspecific male when having been courted previously by a heterospecific male, but Nv females are not. We argue that this strategy is reasonable for Nl females but not for Nv females, which follow a different strategy to avoid the fitness costs imposed by heterospecific copulations.
23
Randler, Christoph. "Do forced extrapair copulations and interspecific brood amalgamation facilitate natural hybridisation in wildfowl?" Behaviour 142, no. 4 (2005): 477–88. http://dx.doi.org/10.1163/1568539054012029.
Full text
24
Spence, John R. "Introgressive hybridization in Heteroptera: the example of Limnoporus Stål (Gerridae) species in western Canada." Canadian Journal of Zoology 68, no. 8 (August 1, 1990): 1770–82. http://dx.doi.org/10.1139/z90-258.
Full textAbstract:
Populations of the pondskaters, Limnoporous dissortis and Limnoporous notabilis, hybridize extensively in the Cordilleran region of western Canada. In laboratory crosses using L. dissortis from central Alberta and L. notabilis from southwestern British Columbia, most eggs are fertilized and begin development, but only ca. 50% of the eggs hatch and nearly all F1 hybrid adults are males. F1 hybrid males are fertile in backcrosses to females of both species, although egg hatch is reduced and mainly male progeny result from crosses to females of the paternal species. These species both have an XO sex chromosome system, and the foregoing results suggest that either products of genes on X chromosomes of the two species are incompatible or that they are incompatible with heterospecific cytoplasmic elements. Males of L. dissortis are more successful at interspecific copulations than are those of L. notabilis, perhaps because they more frequently adopt aggressive mating behaviour that circumvents premating barriers. Although gene pools of these two species are partially isolated by both pre- and post-mating barriers, there has been large-scale exchange of genes at autosomal loci, and significant introgression occurs over a large geographic area. Introgression is asymmetric, with genes of L. dissortis tending to flow disproportionately into L. notabilis populations, reflecting differences between the species in mating behaviour and dispersal tendencies. Because these two species are not closest relatives, I conclude that reticulations can be important considerations in the evolution of semiaquatic bugs. A literature survey shows that interspecific hybridization occurs in a number of heteropteran families, although partial barriers to gene flow are common.
25
Hochkirch, A., A. Bücker, and J. Gröning. "Reproductive Interference between the Common Ground-hopper Tetrix undulata and the Slender Ground-hopper Tetrix subulata (Orthoptera, Tetrigidae)." Bulletin of Entomological Research 98, no. 6 (June 16, 2008): 605–12. http://dx.doi.org/10.1017/s0007485308005907.
Full textAbstract:
AbstractThe coexistence of closely related species is often hampered by resource competition or reproductive interference (interspecific sexual interactions). Species utilising similar signal channels might face substantial problems when they co-occur. It has, therefore, been suggested that reinforcement might drive signal evolution in narrow suture zones of secondary contact. However, species with large overlapping ranges are usually not believed to interact sexually. The Slender Ground-hopper, Tetrix subulata, and the Common Ground-hopper, Tetrix undulata (Orthoptera: Tetrigidae) are sister species, which occur sympatrically in large parts of western and Central Europe, but rarely share the same habitat. It has been hypothesized that reproductive interference might account for their missing coexistence. Here, we test experimentally whether these two species interact sexually. Our results suggest an incomplete premating isolation of these ground-hoppers, as we recorded heterospecific courtship, mating attempts and mating. The number of conspecific copulations and mating attempts of T. subulata decreased substantially in the presence of T. undulata, whereas the latter species was not negatively affected. Males of both species preferred to approach females of T. undulata, whereas females of both species did not discriminate against heterospecific males. Further studies on the reproductive success are needed to clarify whether reproductive interference might influence habitat partitioning between these species.
26
Vinarski, Maxim V., Olga V. Aksenova, and Ivan N. Bolotov. "Taxonomic assessment of genetically-delineated species of radicine snails (Mollusca, Gastropoda, Lymnaeidae)." Zoosystematics and Evolution 96, no. 2 (September 1, 2020): 577–608. http://dx.doi.org/10.3897/zse.96.52860.
Full textAbstract:
The article represents an overview of 29 biological species of the radicine snails (genera Ampullaceana Servain, 1882, Bullastra Bergh, 1901, Racesina Vinarski & Bolotov, 2018, Kamtschaticana Kruglov & Starobogatov, 1984, Myxas G.B. Sowerby I, 1822, Orientogalba Kruglov & Starobogatov, 1985; Peregriana Servain, 1882, Radix Montfort, 1810, and Tibetoradix Bolotov, Vinarski & Aksenova, 2018) recovered during our previous molecular taxonomic study (Aksenova et al. 2018a; Scientific Reports, 8: 11199). For each species, the following information is provided: scientific name, a (non-exhaustive) list of synonyms, type locality, type materials, shell and copulative apparatus morphology, distribution, and nomenclatural and taxonomic remarks. The colour images of shell(s) of each species are also given as well as illustrations of the copulatory apparatuses. We revealed a great conchological variation in the radicines, both intra- and interspecific, alongside with striking uniformity in the structure of their copulatory apparatuses. The latter was once thought to be a reliable tool for species delineation and identification in this snail group. The total of 29 species characterised here represents, probably, only a subset of the global taxonomic richness of the radicine snails, which approaches 50 species.
27
Kon, Masahiro, Akemi Oe, and Hideharu Numata. "Intra- and interspecific copulations in the two congeneric green stink bugs,Nezara antennata andN. viridula (Heteroptera, Pentatomidae), with reference to postcopulatory changes in the spermatheca." Journal of Ethology 11, no. 2 (December 1993): 83–89. http://dx.doi.org/10.1007/bf02350041.
Full text
28
Palopoli, M. F., and C. I. Wu. "Genetics of hybrid male sterility between drosophila sibling species: a complex web of epistasis is revealed in interspecific studies." Genetics 138, no. 2 (October 1, 1994): 329–41. http://dx.doi.org/10.1093/genetics/138.2.329.
Full textAbstract:
Abstract To study the genetic differences responsible for the sterility of their male hybrids, we introgressed small segments of an X chromosome from Drosophila simulans into a pure Drosophila mauritiana genetic background, then assessed the fertility of males carrying heterospecific introgressions of varying size. Although this analysis examined less than 20% of the X chromosome (roughly 5% of the euchromatic portion of the D. simulans genome), and the segments were introgressed in only one direction, a minimum of four factors that contribute to hybrid male sterility were revealed. At least two of the factors exhibited strong epistasis: males carrying either factor alone were consistently fertile, whereas males carrying both factors together were always sterile. Distinct spermatogenic phenotypes were observed for sterile introgressions of different lengths, and it appeared that an interaction between introgressed segments also influenced the stage of spermatogenic defect. Males with one category of introgression often produced large quantities of motile sperm and were observed copulating, but never inseminated females. Evidently these two species have diverged at a large number of loci which have varied effects on hybrid male fertility. By extrapolation, we estimate that there are at least 40 such loci on the X chromosome alone. Because these species exhibit little DNA-sequence divergence at arbitrarily chosen loci, it seems unlikely that the extensive functional divergence observed could be due mainly to random genetic drift. Significant epistasis between conspecific genes appears to be a common component of hybrid sterility between recently diverged species of Drosophila. The linkage relationships of interacting factors could shed light on the role played by epistatic selection in the dynamics of the allele substitutions responsible for reproductive barriers between species.
29
Gąska, Michał, Przemysław Grela, and Janusz Kloskowski. "The role of male nest building in post-mating sexual selection in the monogamous red-necked grebe." Behaviour 149, no. 1 (2012): 81–98. http://dx.doi.org/10.1163/156853912x627997.
Full textAbstract:
AbstractIn monogamous birds, early male parental effort, such as nest building, may serve as a post-mating sexually-selected display allowing female assessment of male quality. We examined the functional significance of male nest building and the potential role of nest size as a sexually-selected signal in the red-necked grebe ( Podiceps grisegena), a species with high mate fidelity. Time-activity budgets showed that no behaviour was performed exclusively by one sex in the pre-laying period, but males spent significantly more time nest building and were more often involved in aggressive intra- and interspecific interactions. Nest building in pairs attempting a second brood was also performed predominantly by males. Greater participation in nest construction by males allowed females to allocate more time to self-maintenance activities in the period prior to egg-laying. The positive relationship found between the relative contribution of males to nest building and later to brood provisioning indicates that male nest building is an honest indicator of future paternal effort. Males obtained copulations solicited by females proportionally to the time spent on nest building, and the extent of male participation in nest construction was of importance for explaining variation in clutch size. Nest size itself is not very likely to be sexually selected in red-necked grebes, as it was found to depend on nest site conditions such as water depth and exposure to wave action. We suggest that greater investment of males in energetically demanding pre-laying activities is functionally similar to post-mating courtship feeding; it constitutes males’ indirect contribution to clutch production and may help to negotiate the relative investment each sex makes in the different stages of the breeding cycle. The results support the idea that, in monogamous birds, naturally selected male characters related to parental care may evolve into important sexual signals to females, although not into extreme displays.
30
Antunes, Cauan, Letícia P. Dias, Gabriel de Almeida Guimarães, Jader Oliveira, João Aristeu da Rosa, Carlos E. Almeida, Catarina M. Lopes, Teresa C. M. Gonçalves, and Jane Costa. "Sexual Choice in Males of the Triatoma brasiliensis Complex: A Matter of Maintenance of the Species or Genetic Variability?" Open Parasitology Journal 8, no. 1 (December 18, 2020): 1–9. http://dx.doi.org/10.2174/1874421402008010001.
Full textAbstract:
Background: Members of the Triatoma brasiliensis complex can produce experimental and natural hybrids. Crossing experiments performed in the laboratory, with several combinations between species of that complex, revealed a gradient of reproductive affinities among them. However, little is known about the reproductive males’ choices when they have the possibility of copulating with females of different species, including interspecific and conspecific females, at the same time. In this unprecedented experiment, the sexual choices of the T. brasiliensis complex and Triatoma infestans males were observed. Methods: Virgin males and females of T. b. brasiliensis, T. sherlocki, and T. infestans, and females of T. juazeirensis were used. The experiment was developed in an arena in which one male, one conspecific female, and two non-conspecific females were observed for 15 minutes. The following variables of mating behavior were observed: the male’s choice for a female; displacement time (the time it took the male to move from its stall until it reached the female); the copula itself (number of attempts and its occurrence); and the type of rejection of copula by the female. Results: Males of T. sherlocki were faster in finding the females (conspecific and non-conspecific) than T. b. brasiliensis and T. infestans. Males of T. b. brasiliensis and T. sherlocki were able to copulate with conspecific females and other female species: T. infestans and T. b. brasiliensis/T. juazeirensis, respectively. While T. infestans copulated with conspecific females, and T. juazeirensis and T. b. brasiliensis females. Conclusion: The results suggest that the choice for the copula is not always towards conspecific females. In fact, the males of the three different species tested were able to copulate with their conspecific females and also with other female species, which may induce the formation of hybrids and greater genetic diversity. These findings pose new challenges to the understanding of the reproductive behavior and the evolutionary aspects of the Triatominae. Therefore, in areas of sympatry, if no ecological barriers exist, there is the possibility of natural hybridization, which might reflect in the epidemiological risks since the species studied occur in endemic areas for the Chagas disease.
31
Seidelmann, Karsten. "Territoriality is just an option: allocation of a resource fundamental to the resource defense polygyny in the European wool carder bee, Anthidium manicatum (Hymenoptera: Megachilidae)." Behavioral Ecology and Sociobiology 75, no. 10 (September 13, 2021). http://dx.doi.org/10.1007/s00265-021-03073-6.
Full textAbstract:
Abstract The wool carder bee Anthidium manicatum is one textbook example of resource defense polygyny among solitary bees, known for intense male–male competition, forced copulations, and the extreme form of interspecific territoriality toward other flower visitors. This mating system depends on the spatial structure of the defended resource and requires several adaptations in males. The allocation of patches with host plants as well as male body size and phenology was analyzed over 3 years in the diverse habitat of a botanical garden. Anthidium manicatum males searched in groups up to 12 individuals a wide diversity of patches with various food plants of foraging females. Territories were established in small high-quality patches only. Males abandoned aggressive and territorial behavior in large patches. Available patches were occupied by males of the various body size fractions independently of each other according to patch profitability. The higher competitive weight of large males in small patches compared to spacious ones was balanced by an opposing correlation of patch profitability. Although the mating system in A. manicatum is clearly a resource defense polygyny, males were found to be plastic in their behavior, and territoriality was not consistently observed. Mate acquiring tactics, be they territory holder (bourgeois), sneaker, floater, or scrambler for mating, can be considered to be different behavioral phenotypes within one environmentally sensitive conditional strategy. Significance statement Territoriality is a rare and derived pattern in solitary bee mating behavior. In most cases of territoriality, males defend rendezvous places to meet freshly emerged, virgin females. While this type of mating behavior fits still into the framework of ancestral monandry of aculeate Hymenoptera, the continually polyandric resource defense polygyny found in the genus Anthidium is highly derived. Males occupy flower resources exploited for larval provisions and extort copulations from provisioning nesting females. Territoriality in Anthidium does not lead to a monopolization of females, the exclusion of many competitors from reproduction, and a reduction of sperm competition as is typical for resource-based mating systems. Contrary, Anthidium is a highly promiscuous species and both males and females are lifelong engaged in copulations with multiple mates. Also, the allocation of the resource fundamental to the defense polygyny was found to be more fairly balanced than expected. This study diversifies the mating system of anthidiine bees and demonstrates unusually high plasticity in the resource allocation of a territorial species.