Pub Date : 2020-01-02DOI: 10.1080/13887890.2019.1687991
R. Wootton
Odonata flight performance capabilities and behaviour and their body and wing form diversity are explored, and their interrelationships discussed theoretically and from observational evidence. Overall size and particularly wing loading appear predictably to be related to speed range. In Anisoptera at least, relatively short bodies and long wings should favour high speed manoeuvrability, though further information is needed. Medium and low aspect ratio wings are associated with gliding and soaring, but the significance of aspect ratio in flapping flight is less straightforward, and much depends on kinematics. Narrow wing bases, petiolation, basal vein fusion, distal concentration of area and a proximally positioned nodus – described by a newly defined variable, the “nodal index” – all allow high torsion between half-strokes and favour habitually slow flight, while broad wing bases are useful at higher speeds. The “basal complex” in all families seems to be a mechanism for automatic lowering of the trailing edge and maintenance of an effective angle of attack, but the relative merits of different configurations are not yet clear. There is serious need for more quantitative information on a wider range of species and families.
{"title":"Dragonfly flight: morphology, performance and behaviour","authors":"R. Wootton","doi":"10.1080/13887890.2019.1687991","DOIUrl":"https://doi.org/10.1080/13887890.2019.1687991","url":null,"abstract":"Odonata flight performance capabilities and behaviour and their body and wing form diversity are explored, and their interrelationships discussed theoretically and from observational evidence. Overall size and particularly wing loading appear predictably to be related to speed range. In Anisoptera at least, relatively short bodies and long wings should favour high speed manoeuvrability, though further information is needed. Medium and low aspect ratio wings are associated with gliding and soaring, but the significance of aspect ratio in flapping flight is less straightforward, and much depends on kinematics. Narrow wing bases, petiolation, basal vein fusion, distal concentration of area and a proximally positioned nodus – described by a newly defined variable, the “nodal index” – all allow high torsion between half-strokes and favour habitually slow flight, while broad wing bases are useful at higher speeds. The “basal complex” in all families seems to be a mechanism for automatic lowering of the trailing edge and maintenance of an effective angle of attack, but the relative merits of different configurations are not yet clear. There is serious need for more quantitative information on a wider range of species and families.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"23 1","pages":"31 - 39"},"PeriodicalIF":0.9,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1687991","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43468004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-02DOI: 10.1080/13887890.2019.1688199
Z. Bouhala, Chakri Khémissa, Joaquín Márquez‐Rodríguez, M. Ferreras‐Romero, Farrah Samraoui, B. Samraoui
We investigated the odonates of Wadi Cherf, a tributary of Wadi Seybouse, and explored the main environmental factors that may be important drivers of the abundance and diversity of Odonata assemblages. PCA analyses demonstrated a significant altitudinal gradient associated with water flow, temperature, vegetation cover, substrate and adjacent land use. Notably, pollution was a dominant structuring factor and the most widespread species, Ischnura graellsii and the North African endemic Platycnemis subdilatata, were the most pollution-tolerant species. Similarly, co-inertia analysis indicated that environmental factors could account for 70% of the co-variation in shaping odonate assemblages. Equally important, threatened species were associated with less degraded but vulnerable habitats, most susceptible to anthropogenic impacts. There is thus a need to develop monitoring tools to assess the ecological integrity of North African rivers and implement a management plan that considers both connectivity and heterogeneity to ensure that Wadi Cherf, a sanctuary to three threatened species Calopteryx exul (EN), Coenagrion mercuriale (EN) and Gomphus lucasii (VU), continues to provide critical ecosystem functions.
{"title":"Ecological correlates of odonate assemblages of a Mediterranean stream, Wadi Cherf, northeastern Algeria: implications for conservation","authors":"Z. Bouhala, Chakri Khémissa, Joaquín Márquez‐Rodríguez, M. Ferreras‐Romero, Farrah Samraoui, B. Samraoui","doi":"10.1080/13887890.2019.1688199","DOIUrl":"https://doi.org/10.1080/13887890.2019.1688199","url":null,"abstract":"We investigated the odonates of Wadi Cherf, a tributary of Wadi Seybouse, and explored the main environmental factors that may be important drivers of the abundance and diversity of Odonata assemblages. PCA analyses demonstrated a significant altitudinal gradient associated with water flow, temperature, vegetation cover, substrate and adjacent land use. Notably, pollution was a dominant structuring factor and the most widespread species, Ischnura graellsii and the North African endemic Platycnemis subdilatata, were the most pollution-tolerant species. Similarly, co-inertia analysis indicated that environmental factors could account for 70% of the co-variation in shaping odonate assemblages. Equally important, threatened species were associated with less degraded but vulnerable habitats, most susceptible to anthropogenic impacts. There is thus a need to develop monitoring tools to assess the ecological integrity of North African rivers and implement a management plan that considers both connectivity and heterogeneity to ensure that Wadi Cherf, a sanctuary to three threatened species Calopteryx exul (EN), Coenagrion mercuriale (EN) and Gomphus lucasii (VU), continues to provide critical ecosystem functions.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"181 - 197"},"PeriodicalIF":0.9,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1688199","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44977862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-02DOI: 10.1080/13887890.2019.1700175
S. Dewan, Nikesh Darnal, Bhoj Kumar Acharya, K. Subramanian, B. Chettri, V. J. Jins
Conversion of natural habitat into agricultural landscape has been identified as one of the major drivers of habitat loss. Human-modified ecosystems, such as agricultural land, have gained significant attention in terms of the conservation of their native biodiversity. We studied the effectiveness of organic agroecosystems in conserving odonate diversity by comparing organic terrace rice cultivation with a nearby natural forest system with streams in Sikkim, Eastern Himalaya, India. We sampled adult odonates using a transect count method (laying six permanent transects) covering two villages (Lingmoo in South Sikkim and Dzongu in North Sikkim), making a total of 48 transect counts. A total of 881 individual odonates representing 31 species under two suborders (16 Anisoptera and 15 Zygoptera) and seven families were recorded during this study. Of these, 20 species representing three families and 18 species representing seven families were observed in terrace rice cultivation and the natural forest system, respectively. Beta diversity estimates showed that the community composition of the odonates differed qualitatively (incidence measure) and quantitatively (abundance measure) between the two land use types. Turnover component (abundance balance in case of abundance based beta diversity measure) had higher contribution in the overall beta diversity, suggesting that one assemblage of species is being replaced by another due to environmental sorting. The variation in community composition between the two habitats was statistically significant. Our results suggest that organic wetland habitats are important for conservation of odonates and associated biodiversity (especially herpetofauna) in the Himalaya and require urgent conservation attention.
{"title":"Effectiveness of organic terrace rice cultivation in conservation of odonates in Sikkim, Eastern Himalaya, India","authors":"S. Dewan, Nikesh Darnal, Bhoj Kumar Acharya, K. Subramanian, B. Chettri, V. J. Jins","doi":"10.1080/13887890.2019.1700175","DOIUrl":"https://doi.org/10.1080/13887890.2019.1700175","url":null,"abstract":"Conversion of natural habitat into agricultural landscape has been identified as one of the major drivers of habitat loss. Human-modified ecosystems, such as agricultural land, have gained significant attention in terms of the conservation of their native biodiversity. We studied the effectiveness of organic agroecosystems in conserving odonate diversity by comparing organic terrace rice cultivation with a nearby natural forest system with streams in Sikkim, Eastern Himalaya, India. We sampled adult odonates using a transect count method (laying six permanent transects) covering two villages (Lingmoo in South Sikkim and Dzongu in North Sikkim), making a total of 48 transect counts. A total of 881 individual odonates representing 31 species under two suborders (16 Anisoptera and 15 Zygoptera) and seven families were recorded during this study. Of these, 20 species representing three families and 18 species representing seven families were observed in terrace rice cultivation and the natural forest system, respectively. Beta diversity estimates showed that the community composition of the odonates differed qualitatively (incidence measure) and quantitatively (abundance measure) between the two land use types. Turnover component (abundance balance in case of abundance based beta diversity measure) had higher contribution in the overall beta diversity, suggesting that one assemblage of species is being replaced by another due to environmental sorting. The variation in community composition between the two habitats was statistically significant. Our results suggest that organic wetland habitats are important for conservation of odonates and associated biodiversity (especially herpetofauna) in the Himalaya and require urgent conservation attention.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"207 - 222"},"PeriodicalIF":0.9,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1700175","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43216725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-02DOI: 10.1080/13887890.2019.1696238
Q. T. Phan, Van Quang To, Dang Mau Trinh, Van Khuong Dinh
Protosticta binhi sp. n. is described from the Central Highlands of Vietnam (holotype male: Vietnam, Gia Lai Province, K’Bang District, Dak Roong Commune, Dak Hro village, 14.36611° N, 108.4103° E, 1130 m asl, 22 May 2018, T.odo. 22051810, Zoological Collection of Duy Tan University). The new species can be easily distinguished from all other Protosticta species by the combination of huge body size, bird-head shape of cerci and paraprocts broad and apically armed with several sharp subapical projections in the male, and the anterior pronotal lobe of the prothorax well developed in the female. http://www.zoobank.org/urn:lsid:zoobank.org:pub:F047FB25-2B21-447D-8E4A-BA3A7DC77138
Protosticta binhi sp. N .被描述自越南中部高地(全型雄性:越南，Gia Lai省，K 'Bang区，Dak Roong公社，Dak Hro村，14.36611°N, 108.4103°E, 1130 m asl, 2018年5月22日，T.odo。北京师范大学动物科学研究所(22051810)该新种体长巨大，尾毛和副毛呈鸟头状，雄鸟的尾毛和副毛较宽，顶端有几个尖尖的近顶突，雌鸟的前胸前额叶发育良好，与其他原生动物很容易区分。http://www.zoobank.org/urn:lsid:zoobank.org:pub:F047FB25-2B21-447D-8E4A-BA3A7DC77138
{"title":"Description of Protosticta binhi sp. n. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platystictidae)","authors":"Q. T. Phan, Van Quang To, Dang Mau Trinh, Van Khuong Dinh","doi":"10.1080/13887890.2019.1696238","DOIUrl":"https://doi.org/10.1080/13887890.2019.1696238","url":null,"abstract":"Protosticta binhi sp. n. is described from the Central Highlands of Vietnam (holotype male: Vietnam, Gia Lai Province, K’Bang District, Dak Roong Commune, Dak Hro village, 14.36611° N, 108.4103° E, 1130 m asl, 22 May 2018, T.odo. 22051810, Zoological Collection of Duy Tan University). The new species can be easily distinguished from all other Protosticta species by the combination of huge body size, bird-head shape of cerci and paraprocts broad and apically armed with several sharp subapical projections in the male, and the anterior pronotal lobe of the prothorax well developed in the female. http://www.zoobank.org/urn:lsid:zoobank.org:pub:F047FB25-2B21-447D-8E4A-BA3A7DC77138","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"199 - 206"},"PeriodicalIF":0.9,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1696238","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43058400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-02DOI: 10.1080/13887890.2019.1668306
Tom Bell, Jack Harriss, A. Ruzaini, C. Fernando, P. Guay, M. Weston
Predator escape behaviour is a critical component of dragonfly life history. Flight initiation distance is the distance at which escape commences, and is well studied in vertebrates, barely studied in invertebrates, and entirely unstudied in dragonflies. Here we test four principles regarding flight initiation distance as derived from studies of vertebrates to examine if they apply to dragonflies in Sri Lanka: (1) flight initiation distance is a species-specific trait; (2) flight initiation distance increases with starting distance (the distance at which the experimenter begins an approach); (3) larger individuals have longer flight initiation distances; and (4) flight initiation distance varies between the sexes in some species. We collected 105 flight initiation distances from 11 species (known sex and size). Flight initiation distances varied between species and positively with starting distance. In one of three data-rich species (n ≥ 10), flight initiation distance was positively associated with body length. Flight initiation distance did not vary with sex in our sample. Escape responses evoked by standardised human approaches represent a fruitful methodology to study dragonfly escape behaviour in the wild.
{"title":"Flight initiation distance in dragonflies is species-specific, positively related to starting distance and sometimes body length","authors":"Tom Bell, Jack Harriss, A. Ruzaini, C. Fernando, P. Guay, M. Weston","doi":"10.1080/13887890.2019.1668306","DOIUrl":"https://doi.org/10.1080/13887890.2019.1668306","url":null,"abstract":"Predator escape behaviour is a critical component of dragonfly life history. Flight initiation distance is the distance at which escape commences, and is well studied in vertebrates, barely studied in invertebrates, and entirely unstudied in dragonflies. Here we test four principles regarding flight initiation distance as derived from studies of vertebrates to examine if they apply to dragonflies in Sri Lanka: (1) flight initiation distance is a species-specific trait; (2) flight initiation distance increases with starting distance (the distance at which the experimenter begins an approach); (3) larger individuals have longer flight initiation distances; and (4) flight initiation distance varies between the sexes in some species. We collected 105 flight initiation distances from 11 species (known sex and size). Flight initiation distances varied between species and positively with starting distance. In one of three data-rich species (n ≥ 10), flight initiation distance was positively associated with body length. Flight initiation distance did not vary with sex in our sample. Escape responses evoked by standardised human approaches represent a fruitful methodology to study dragonfly escape behaviour in the wild.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"173 - 179"},"PeriodicalIF":0.9,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1668306","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48762682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-18DOI: 10.1080/13887890.2019.1654932
J. Trueman, R. Rowe
We address six issues raised by Nel, Garrouste and Schubnel (2019) concerning the scheme of wing vein homology and nomenclature proposed by Trueman and Rowe (2019); showing in particular how evidence presented in a tomographical study of a dragonfly wing by Jacquelin et al. (2018) fits into this scheme.
{"title":"Reply to Nel, Garrouste, and Schubnel (2019) “The wing venation of Odonata. International Journal of Odonatology”","authors":"J. Trueman, R. Rowe","doi":"10.1080/13887890.2019.1654932","DOIUrl":"https://doi.org/10.1080/13887890.2019.1654932","url":null,"abstract":"We address six issues raised by Nel, Garrouste and Schubnel (2019) concerning the scheme of wing vein homology and nomenclature proposed by Trueman and Rowe (2019); showing in particular how evidence presented in a tomographical study of a dragonfly wing by Jacquelin et al. (2018) fits into this scheme.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"167 - 172"},"PeriodicalIF":0.9,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1654932","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47998748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-09-18DOI: 10.1080/13887890.2019.1641853
Xin Yu, Min Zhang, Xin Ning
Coeliccia cyanomelas is studied based on a large series of specimens from its whole distribution range. Intraspecies variations of color patterns on the thorax are discussed. Coeliccia sexmaculata Wang, 1994, Coeliccia mingxiensis Xu, 2006, and Coeliccia wilsoni Zhang & Huo, 2011 are all assigned as junior synonyms of Coeliccia cyanomelas. One ‘variety’ from Guizhou is reported and discussed briefly.
{"title":"A study of Coeliccia cyanomelas Ris, 1912 (Odonata: Platycnemididiae)","authors":"Xin Yu, Min Zhang, Xin Ning","doi":"10.1080/13887890.2019.1641853","DOIUrl":"https://doi.org/10.1080/13887890.2019.1641853","url":null,"abstract":"Coeliccia cyanomelas is studied based on a large series of specimens from its whole distribution range. Intraspecies variations of color patterns on the thorax are discussed. Coeliccia sexmaculata Wang, 1994, Coeliccia mingxiensis Xu, 2006, and Coeliccia wilsoni Zhang & Huo, 2011 are all assigned as junior synonyms of Coeliccia cyanomelas. One ‘variety’ from Guizhou is reported and discussed briefly.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"155 - 165"},"PeriodicalIF":0.9,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1641853","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43029407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-03DOI: 10.1080/13887890.2019.1587645
S. Gorb
This short communication reports on the warming ability of the damselfly Sympecma paedisca, which is known for its winter hibernation and tolerance to low temperatures. The data were collected using an infrared camera in late September on two sunny days (air temperature 15–17°C) in the vicinity of Kyiv, Central Ukraine. The obtained data show that the thorax was almost always the warmest part of the body (up to 21°C in comparison to 17–18°C of the substrates damselflies were resting on and surrounding living plants). This indicates that the animals, in addition to sun, use their thoracic musculature to warm their bodies up. There was a clear correlation between thorax temperature and the temperature of both the head and abdomen, which means the warmed up thorax can transport part of its heat to other parts of the body by using their circulatory system.
{"title":"Body temperatures in Sympecma paedisca (Zygoptera, Lestidae) in the autumn in the Central Ukraine","authors":"S. Gorb","doi":"10.1080/13887890.2019.1587645","DOIUrl":"https://doi.org/10.1080/13887890.2019.1587645","url":null,"abstract":"This short communication reports on the warming ability of the damselfly Sympecma paedisca, which is known for its winter hibernation and tolerance to low temperatures. The data were collected using an infrared camera in late September on two sunny days (air temperature 15–17°C) in the vicinity of Kyiv, Central Ukraine. The obtained data show that the thorax was almost always the warmest part of the body (up to 21°C in comparison to 17–18°C of the substrates damselflies were resting on and surrounding living plants). This indicates that the animals, in addition to sun, use their thoracic musculature to warm their bodies up. There was a clear correlation between thorax temperature and the temperature of both the head and abdomen, which means the warmed up thorax can transport part of its heat to other parts of the body by using their circulatory system.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"100 - 95"},"PeriodicalIF":0.9,"publicationDate":"2019-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1587645","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46882990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-03DOI: 10.1080/13887890.2019.1593889
B. Adu, B. Amusan, T. Oke
This study investigated the biological water quality and Odonata assemblages in three waterbodies in Ilara-Mokin, with the aim of determining the ecological integrity of the ecosystems. Sampling of Odonata specimens was carried out over April–August, 2017 between 9.00am and 4.00pm under favourable conditions. Some physico-chemical parameters of the water such as dissolved oxygen, electrical conductivity, temperature, flow rate, pH, and water depth were also investigated. A total of 41 odonate species were recorded in this study and this was represented by 29 dragonfly and 12 damselfly species. These species are contained in seven families (Macromiidae, Gomphidae, Libellulidae, Calopterygidae, Coenagrionidae, Chlorocyphidae and Platycnemididae). The seven families were recorded at Aponmu River while Omifunfun River and Isokun River accounted for six and four families respectively. However, the highest number of individuals was collected at Isokun River. Libellulidae was the dominant family. Diversity indices revealed that Aponmu river was the richest in terms of species richness, diversity and taxa distribution (Shannon: 3.18, Simpson D: 0.95, Margalef: 7.38, evenness: 7.38, equitability: 0.93). Dragonfly Biotic Index (DBI) analysis indicated that Omifunfun River represented the best habitat condition in the study area while Isokun River was considered the most perturbed sampled site in the study area. Conservative efforts should be intensified to protect Omifunfun River in order to preserve all extant aquatic biota and other available resources therein.
{"title":"Assessment of the water quality and Odonata assemblages in three waterbodies in Ilara-Mokin, south-western Nigeria","authors":"B. Adu, B. Amusan, T. Oke","doi":"10.1080/13887890.2019.1593889","DOIUrl":"https://doi.org/10.1080/13887890.2019.1593889","url":null,"abstract":"This study investigated the biological water quality and Odonata assemblages in three waterbodies in Ilara-Mokin, with the aim of determining the ecological integrity of the ecosystems. Sampling of Odonata specimens was carried out over April–August, 2017 between 9.00am and 4.00pm under favourable conditions. Some physico-chemical parameters of the water such as dissolved oxygen, electrical conductivity, temperature, flow rate, pH, and water depth were also investigated. A total of 41 odonate species were recorded in this study and this was represented by 29 dragonfly and 12 damselfly species. These species are contained in seven families (Macromiidae, Gomphidae, Libellulidae, Calopterygidae, Coenagrionidae, Chlorocyphidae and Platycnemididae). The seven families were recorded at Aponmu River while Omifunfun River and Isokun River accounted for six and four families respectively. However, the highest number of individuals was collected at Isokun River. Libellulidae was the dominant family. Diversity indices revealed that Aponmu river was the richest in terms of species richness, diversity and taxa distribution (Shannon: 3.18, Simpson D: 0.95, Margalef: 7.38, evenness: 7.38, equitability: 0.93). Dragonfly Biotic Index (DBI) analysis indicated that Omifunfun River represented the best habitat condition in the study area while Isokun River was considered the most perturbed sampled site in the study area. Conservative efforts should be intensified to protect Omifunfun River in order to preserve all extant aquatic biota and other available resources therein.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"101 - 114"},"PeriodicalIF":0.9,"publicationDate":"2019-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1593889","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49579595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-03DOI: 10.1080/13887890.2019.1637378
Jareth Román-Heracleo, R. Novelo-Gutiérrez
The final stadium larva of Anisagrion allopterum is described for the first time for Middle America, based upon specimens reared and emerging in the field, from Cartago, Province, Costa Rica. Detailed illustrations are also provided. The larva of this species is characterized by a slender yellow body, premental setae 4+1, five palpal setae, male cerci globose, and caudal lamellae densely tracheate.
{"title":"Description of the final stadium larva of Anisagrion allopterum (Odonata: Coenagrionidae)","authors":"Jareth Román-Heracleo, R. Novelo-Gutiérrez","doi":"10.1080/13887890.2019.1637378","DOIUrl":"https://doi.org/10.1080/13887890.2019.1637378","url":null,"abstract":"The final stadium larva of Anisagrion allopterum is described for the first time for Middle America, based upon specimens reared and emerging in the field, from Cartago, Province, Costa Rica. Detailed illustrations are also provided. The larva of this species is characterized by a slender yellow body, premental setae 4+1, five palpal setae, male cerci globose, and caudal lamellae densely tracheate.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":"22 1","pages":"147 - 154"},"PeriodicalIF":0.9,"publicationDate":"2019-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2019.1637378","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45508252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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