Pub Date : 2022-02-20DOI: 10.1080/23766808.2022.2029323
A. Hernandez, C. Dufresnes, Jean Raffaëlli, Emmanuel Jelsch, S. Dubey, A. Santiago-Pérez, V. C. Rosas-Espinoza, P. Núñez
ABSTRACT We report on the discovery of a population related to the Blunt-headed Salamander (Ambystoma amblycephalum), a micro-endemic axolotl from Mexico scientifically confirmed only once since its original description in 1940, and now presumably extinct. In 2018, paedomorphic and metamorphosed adults, as well as clutches and larvae, were found in a cattle pond at Nahuatzen, Michoacán state, Mexico, ~60 km away from the type locality (Tacícuaro). Morphometric comparisons suggested high similarity with the type series of A. amblycephalum, while mitochondrial DNA barcoding (16S and control region) revealed close (but imperfect) matching to a reference sequence. We gathered data on life history and ecology of this population, which could be the only extant relic of A. amblycephalum. Its highly limited distribution and presumably low population density are hallmarks for a high risk of extinction, and alarms on the critical situation of many micro-endemic salamanders of Mexico, hence calling for immediate conservation actions.
{"title":"Hope in the dark: discovery of a population related to the presumably extinct micro-endemic Blunt-headed Salamander (Ambystoma amblycephalum)","authors":"A. Hernandez, C. Dufresnes, Jean Raffaëlli, Emmanuel Jelsch, S. Dubey, A. Santiago-Pérez, V. C. Rosas-Espinoza, P. Núñez","doi":"10.1080/23766808.2022.2029323","DOIUrl":"https://doi.org/10.1080/23766808.2022.2029323","url":null,"abstract":"ABSTRACT We report on the discovery of a population related to the Blunt-headed Salamander (Ambystoma amblycephalum), a micro-endemic axolotl from Mexico scientifically confirmed only once since its original description in 1940, and now presumably extinct. In 2018, paedomorphic and metamorphosed adults, as well as clutches and larvae, were found in a cattle pond at Nahuatzen, Michoacán state, Mexico, ~60 km away from the type locality (Tacícuaro). Morphometric comparisons suggested high similarity with the type series of A. amblycephalum, while mitochondrial DNA barcoding (16S and control region) revealed close (but imperfect) matching to a reference sequence. We gathered data on life history and ecology of this population, which could be the only extant relic of A. amblycephalum. Its highly limited distribution and presumably low population density are hallmarks for a high risk of extinction, and alarms on the critical situation of many micro-endemic salamanders of Mexico, hence calling for immediate conservation actions.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44857808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-20DOI: 10.1080/23766808.2022.2040275
Salomón M. Ramírez-Jaramillo, Gabriela González
ABSTRACT To determine the diet of Erythrolamprus aesculapii we reviewed 15 literature sources and make a list of preys registered in Ecuador and South America. In addition, we reported the consumption of an additional species in the list. We identified a total of 40 prey item, 36 (90%) of them are ophidians (34 colubrids and one elapid). E. aesculapii could be considered as an ophiophagous species.
{"title":"Revisión de la dieta de Erythrolamprus aesculapii (Squamata: Colubridae) y un nuevo registro desde Ecuador","authors":"Salomón M. Ramírez-Jaramillo, Gabriela González","doi":"10.1080/23766808.2022.2040275","DOIUrl":"https://doi.org/10.1080/23766808.2022.2040275","url":null,"abstract":"ABSTRACT To determine the diet of Erythrolamprus aesculapii we reviewed 15 literature sources and make a list of preys registered in Ecuador and South America. In addition, we reported the consumption of an additional species in the list. We identified a total of 40 prey item, 36 (90%) of them are ophidians (34 colubrids and one elapid). E. aesculapii could be considered as an ophiophagous species.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44676971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-20DOI: 10.1080/23766808.2022.2040279
M. L. Chatellenaz, Juan M. Fernandez, María L. Thomann
ABSTRACT The Rose-ringed parakeet (Psittacula krameri), native to India, South Asia, and Sub-Saharan Africa, is considered one of the most invasive bird species. It has been recorded in 37 countries, in some of which it was originally introduced as a pet. It has become an agricultural pest and a threat to native birds in many countries. In South America, populations of this species were only known to exist in Venezuela and the Caribbean Islands. We report the finding of a small reproductive population of Rose-ringed parakeets in the city of Corrientes, in northeastern Argentina. We provide information on its observed feeding patterns and interactions with two other species of birds. We suggest monitoring the species and its population trends, as well as starting an awareness campaign of the dangers to native fauna posed by invasive alien species.
{"title":"First record of a population of Rose-ringed parakeet (Psittacula krameri) in Argentina","authors":"M. L. Chatellenaz, Juan M. Fernandez, María L. Thomann","doi":"10.1080/23766808.2022.2040279","DOIUrl":"https://doi.org/10.1080/23766808.2022.2040279","url":null,"abstract":"ABSTRACT The Rose-ringed parakeet (Psittacula krameri), native to India, South Asia, and Sub-Saharan Africa, is considered one of the most invasive bird species. It has been recorded in 37 countries, in some of which it was originally introduced as a pet. It has become an agricultural pest and a threat to native birds in many countries. In South America, populations of this species were only known to exist in Venezuela and the Caribbean Islands. We report the finding of a small reproductive population of Rose-ringed parakeets in the city of Corrientes, in northeastern Argentina. We provide information on its observed feeding patterns and interactions with two other species of birds. We suggest monitoring the species and its population trends, as well as starting an awareness campaign of the dangers to native fauna posed by invasive alien species.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43674086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-20DOI: 10.1080/23766808.2022.2040278
Diego José Arévalo Ayala
ABSTRACT Breeding in colonies is a defining characteristic of many waterbird species and several behavioural and habitat traits determine nest-site selection. Although there is relatively extensive literature on the topic, information on the within-colony distribution of nests lacks for mixed colonies, especially for ardeid-cormorant associations and in regions such as Central America. Here, geospatial data on vegetation associated with a mixed colony, established in a small alluvial forest northwest of El Salvador and collected from June to November 2015 was assessed to identify some behavioural and habitat features that could influence nest-site selection. Four ardeid species (Ardea alba, Egretta thula, Bubulcus ibis, and Nycticorax nycticorax) and one cormorant (Phalacrocorax brasilianus) conformed the colony, where the last was the outstanding species. The total area of the colony was 2.14 ha (14% of La Barra forest) with high nest densities (584.58 nests/ha). Spatial analyses indicate that some species prefer to occupy trees/shrubs close to other trees/shrubs with conspecific or similarly sized species. A remarkable height-strata distribution was found, with large-sized species in the canopy, and small-sized species in the lower strata. The resulting estimates of the generalized linear models applied suggest that the within-colony nest-site selection is determined by the combination of higher heights of the tree/shrub used for nesting, nearest distance to a food source, fewer species sharing the same tree/shrub and an increasing effect of the interaction of the latter two factors. Finally, the temporal evolution of La Barra’s colony shows that the increasing number of Neotropical Cormorants (Phalacrocorax brasilianus) could be shaping and threatening the colony’s species structure and possibly the vegetation as well. Conservation measures should be implemented to manage the population of this species.
{"title":"Within-colony nest distribution of a waterbird mixed colony in a small alluvial forest at El Salvador","authors":"Diego José Arévalo Ayala","doi":"10.1080/23766808.2022.2040278","DOIUrl":"https://doi.org/10.1080/23766808.2022.2040278","url":null,"abstract":"ABSTRACT Breeding in colonies is a defining characteristic of many waterbird species and several behavioural and habitat traits determine nest-site selection. Although there is relatively extensive literature on the topic, information on the within-colony distribution of nests lacks for mixed colonies, especially for ardeid-cormorant associations and in regions such as Central America. Here, geospatial data on vegetation associated with a mixed colony, established in a small alluvial forest northwest of El Salvador and collected from June to November 2015 was assessed to identify some behavioural and habitat features that could influence nest-site selection. Four ardeid species (Ardea alba, Egretta thula, Bubulcus ibis, and Nycticorax nycticorax) and one cormorant (Phalacrocorax brasilianus) conformed the colony, where the last was the outstanding species. The total area of the colony was 2.14 ha (14% of La Barra forest) with high nest densities (584.58 nests/ha). Spatial analyses indicate that some species prefer to occupy trees/shrubs close to other trees/shrubs with conspecific or similarly sized species. A remarkable height-strata distribution was found, with large-sized species in the canopy, and small-sized species in the lower strata. The resulting estimates of the generalized linear models applied suggest that the within-colony nest-site selection is determined by the combination of higher heights of the tree/shrub used for nesting, nearest distance to a food source, fewer species sharing the same tree/shrub and an increasing effect of the interaction of the latter two factors. Finally, the temporal evolution of La Barra’s colony shows that the increasing number of Neotropical Cormorants (Phalacrocorax brasilianus) could be shaping and threatening the colony’s species structure and possibly the vegetation as well. Conservation measures should be implemented to manage the population of this species.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47589465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-20DOI: 10.1080/23766808.2022.2040348
J. Reyes, R. Severino, F. Brusa
Abstract Microturbellarians are all mostly small free-living Platyhelminthes that do not belong to either the Polycladida or Tricladida order. This group includes species of the clades Catenulida and Rhabditophora. Species of microturbellarians are known to live in marine and continental waters such as rivers, where they are diverse and abundant. However, there are few records of microturbellarians in most of the rivers of the Pacific slope of Peru. Here, we report eight species of microturbellarians from the Chillón River, in the central region of Peru. Of the total species recorded, five (Gieysztoria cuspidata, G. bellis, Myostenostomum vanderlandi, Stenostomum tuberculosum and S. saliens) represent the first reports on the Pacific slope of the Neotropical region in Peru, thereby increasing the diversity of microturbellarians in this country.
{"title":"New records of free-living microturbellarians from the Chillón River, Peru","authors":"J. Reyes, R. Severino, F. Brusa","doi":"10.1080/23766808.2022.2040348","DOIUrl":"https://doi.org/10.1080/23766808.2022.2040348","url":null,"abstract":"Abstract Microturbellarians are all mostly small free-living Platyhelminthes that do not belong to either the Polycladida or Tricladida order. This group includes species of the clades Catenulida and Rhabditophora. Species of microturbellarians are known to live in marine and continental waters such as rivers, where they are diverse and abundant. However, there are few records of microturbellarians in most of the rivers of the Pacific slope of Peru. Here, we report eight species of microturbellarians from the Chillón River, in the central region of Peru. Of the total species recorded, five (Gieysztoria cuspidata, G. bellis, Myostenostomum vanderlandi, Stenostomum tuberculosum and S. saliens) represent the first reports on the Pacific slope of the Neotropical region in Peru, thereby increasing the diversity of microturbellarians in this country.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47589006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-15DOI: 10.1080/23766808.2022.2031723
Paolo Salazar Mendoza, Yoseph Ojeda-Enriquez, Carmen Salcedo-Velarde
ABSTRACT We report hymenopteran larval and pupal parasitoids of the Dasiops species in sweet granadilla (Passiflora ligularis J.) orchards in a Peruvian Andean forest. Flower bud and fruit samples infested by Dasiops were collected in three orchards from Oxapampa (Pasco, Peru). In addition, we exposed non-parasitized Dasiops pupae at ground level to verify the presence of pupal parasitoids. We identified Utetes anastrephae (Viereck) and Opius sp. (Hymenoptera: Braconidae) on flower buds infested b.y Dasiops inedulis Steyskal. However, Aganaspis pelleranoi (Brèthes) (Hymenoptera: Figitidae) emerged from D. frieseni pupae reared from unripe fruits. Also, the pupal parasitoids Pachycrepoideus vindemmiae (Rondani) (Hymenoptera: Pteromalidae) and Coptera sp. (Hymenoptera: Diapriidae) emerged from pupae of both D. inedulis and D. frieseni exposed to parasitism at ground level. Our findings shed new light into new interactions for species in the genus Dasiops and their larval and pupal parasitoids in sweet granadilla agroecosystems from the Neotropical region.
{"title":"Parasitoids of Dasiops (Diptera: Lonchaeidae) in sweet granadilla orchards in an Andean forest of Peru","authors":"Paolo Salazar Mendoza, Yoseph Ojeda-Enriquez, Carmen Salcedo-Velarde","doi":"10.1080/23766808.2022.2031723","DOIUrl":"https://doi.org/10.1080/23766808.2022.2031723","url":null,"abstract":"ABSTRACT We report hymenopteran larval and pupal parasitoids of the Dasiops species in sweet granadilla (Passiflora ligularis J.) orchards in a Peruvian Andean forest. Flower bud and fruit samples infested by Dasiops were collected in three orchards from Oxapampa (Pasco, Peru). In addition, we exposed non-parasitized Dasiops pupae at ground level to verify the presence of pupal parasitoids. We identified Utetes anastrephae (Viereck) and Opius sp. (Hymenoptera: Braconidae) on flower buds infested b.y Dasiops inedulis Steyskal. However, Aganaspis pelleranoi (Brèthes) (Hymenoptera: Figitidae) emerged from D. frieseni pupae reared from unripe fruits. Also, the pupal parasitoids Pachycrepoideus vindemmiae (Rondani) (Hymenoptera: Pteromalidae) and Coptera sp. (Hymenoptera: Diapriidae) emerged from pupae of both D. inedulis and D. frieseni exposed to parasitism at ground level. Our findings shed new light into new interactions for species in the genus Dasiops and their larval and pupal parasitoids in sweet granadilla agroecosystems from the Neotropical region.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48378704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-14DOI: 10.1080/23766808.2022.2029320
Diego Batallas, J. Brito
ABSTRACT We describe for the first time the call of Rhinella festae (Peracca, 1904), recording it in captivity inside a plastic bag. The call is composed of 1 to 2 multi-pulsed notes (2–5 pulses), has an average duration of 0.72 s, and a dominant frequency of 1.40 kHz. This species is characterized by the absence of vocal slits and sacs, so the emission of this call would be considered unusual and uncommon. In addition to the purpose of improving the knowledge of species suggested as mutes, we have also compiled information from other anuran species that emit sounds with the absence of these anatomical structures.
{"title":"The call of Rhinella festae (Peracca, 1904) (Anura: Bufonidae) from Morona Santiago, Ecuador","authors":"Diego Batallas, J. Brito","doi":"10.1080/23766808.2022.2029320","DOIUrl":"https://doi.org/10.1080/23766808.2022.2029320","url":null,"abstract":"ABSTRACT We describe for the first time the call of Rhinella festae (Peracca, 1904), recording it in captivity inside a plastic bag. The call is composed of 1 to 2 multi-pulsed notes (2–5 pulses), has an average duration of 0.72 s, and a dominant frequency of 1.40 kHz. This species is characterized by the absence of vocal slits and sacs, so the emission of this call would be considered unusual and uncommon. In addition to the purpose of improving the knowledge of species suggested as mutes, we have also compiled information from other anuran species that emit sounds with the absence of these anatomical structures.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47718546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-27DOI: 10.1080/23766808.2021.2010453
Nathalia Hiluy Pecly, Victor Quintas, G. Mejdalani
ABSTRACT The male and female terminalia of the poorly known sharpshooter Macugonalia semiguttata are described and illustrated for the first time based on specimens from a mountainous region in Rio de Janeiro State, southeastern Brazil (Atlantic Forest). External characters of the head, thorax, and abdomen of this species are also described and illustrated. Macugonalia semiguttata is compared with other seven similar species of the diverse genus Macugonalia Young, 1977. Among the 28 known species of this genus, it is apparently closely related to Macugonalia dallasi (Signoret, 1853), Macugonalia geographica (Signoret, 1855), and Macugonalia elegantula Cavichioli, 2004. Specimens of M. semiguttata were collected from the leaves and branches of shrubs and small trees in an area of low forest (circa 1,700 m a.s.l.), which is intermediate between the typical Atlantic Forest and the vegetation of alpine fields.
摘要根据巴西东南部里约热内卢州（大西洋森林）一个山区的标本，首次描述和说明了鲜为人知的神枪手Macugonalia semigutta的雄性和雌性绝症。还描述和说明了该物种的头部、胸部和腹部的外部特征。1977年，将半喉头麦穗藻与其他七种不同属的类似物种进行了比较。在该属的28个已知物种中，它显然与达拉西马孔藻（Signoret，1853）、地理马孔藻（Signore，1855）和Cavicioli马孔藻密切相关，2004年。半古塔M.semigutta的标本是从一片低矮森林（约1700 M a.s.l.）的灌木和小树的叶子和树枝上采集的，该森林位于典型的大西洋森林和高山植被之间。
{"title":"Taxonomic notes on Macugonalia semiguttata (Signoret, 1853) with first descriptions of the male and female terminalia (Insecta: Hemiptera: Cicadellidae: Cicadellini)","authors":"Nathalia Hiluy Pecly, Victor Quintas, G. Mejdalani","doi":"10.1080/23766808.2021.2010453","DOIUrl":"https://doi.org/10.1080/23766808.2021.2010453","url":null,"abstract":"ABSTRACT The male and female terminalia of the poorly known sharpshooter Macugonalia semiguttata are described and illustrated for the first time based on specimens from a mountainous region in Rio de Janeiro State, southeastern Brazil (Atlantic Forest). External characters of the head, thorax, and abdomen of this species are also described and illustrated. Macugonalia semiguttata is compared with other seven similar species of the diverse genus Macugonalia Young, 1977. Among the 28 known species of this genus, it is apparently closely related to Macugonalia dallasi (Signoret, 1853), Macugonalia geographica (Signoret, 1855), and Macugonalia elegantula Cavichioli, 2004. Specimens of M. semiguttata were collected from the leaves and branches of shrubs and small trees in an area of low forest (circa 1,700 m a.s.l.), which is intermediate between the typical Atlantic Forest and the vegetation of alpine fields.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43805230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-27DOI: 10.1080/23766808.2021.2021051
Attish Kanhai
ABSTRACT Bon Accord Lagoon (BAL), Tobago is home to a Thalassia testudinum (K.D. Koenig, 1805) dominated seagrass community and polychaetes usually show an affinity to seagrass beds compared to other environments. The objectives of this study were to investigate the polychaete community associated with the Thalassia beds in BAL, determine seasonal variation, and compare with the neighbouring hard bottom polychaete community in Mt. Irvine Bay (MIB). Benthic macroinvertebrates were sampled using a 15 cm diameter corer at a depth of 10 cm. Six stations were sampled during the wet and dry seasons of 2018. Samples were sieved in the field using a 0. 5 mm mesh screen. They were stained and preserved with a 10% formalin-seawater mixture, sorted and macrofaunal species identified to the lowest possible taxonomic level. Thirty – one polychaete families were ranked according to trophic categories as described by Fauchald and Jumars (1979) and updated where possible. Average family density for the dry season was recorded at 206.89 ± 307.53 ind/m2 and 129.55 ± 227.23 ind/m2 for the wet. Maldanidae and Syllidae recorded highest densities for dry and wet seasons respectively. Deposit feeders were the largest trophic group represented across both seasons in the BAL with Maldanidae being the most dominant. Carnivorous polychaetes dominated MIB with Syllidae being the most dominant. BAL showed higher diversity and richness compared to MIB. Based on functional traits of the community the environment at BAL can be regarded as healthy. This study establishes a much-needed baseline for future research and management of marine biodiversity in southwest Tobago.
{"title":"Spatial and seasonal variation in polychaete communities according to their trophic categories in Southwest Tobago, West Indies","authors":"Attish Kanhai","doi":"10.1080/23766808.2021.2021051","DOIUrl":"https://doi.org/10.1080/23766808.2021.2021051","url":null,"abstract":"ABSTRACT Bon Accord Lagoon (BAL), Tobago is home to a Thalassia testudinum (K.D. Koenig, 1805) dominated seagrass community and polychaetes usually show an affinity to seagrass beds compared to other environments. The objectives of this study were to investigate the polychaete community associated with the Thalassia beds in BAL, determine seasonal variation, and compare with the neighbouring hard bottom polychaete community in Mt. Irvine Bay (MIB). Benthic macroinvertebrates were sampled using a 15 cm diameter corer at a depth of 10 cm. Six stations were sampled during the wet and dry seasons of 2018. Samples were sieved in the field using a 0. 5 mm mesh screen. They were stained and preserved with a 10% formalin-seawater mixture, sorted and macrofaunal species identified to the lowest possible taxonomic level. Thirty – one polychaete families were ranked according to trophic categories as described by Fauchald and Jumars (1979) and updated where possible. Average family density for the dry season was recorded at 206.89 ± 307.53 ind/m2 and 129.55 ± 227.23 ind/m2 for the wet. Maldanidae and Syllidae recorded highest densities for dry and wet seasons respectively. Deposit feeders were the largest trophic group represented across both seasons in the BAL with Maldanidae being the most dominant. Carnivorous polychaetes dominated MIB with Syllidae being the most dominant. BAL showed higher diversity and richness compared to MIB. Based on functional traits of the community the environment at BAL can be regarded as healthy. This study establishes a much-needed baseline for future research and management of marine biodiversity in southwest Tobago.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47767305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1080/23766808.2021.1982585
Michelle Baquerizo, J. A. Salas
ABSTRACT Lead (Pb) has generated a worldwide concern for its genotoxic effects on human health, and its ability to be bioaccumulative in ecosystems, but nevertheless, there are no estimates of wildlife from terrestrial habitats in Ecuador. Our objective was to determine the concentration of Pb in soft and bone tissues from bats species collected in areas with urban influence in Guayas province, western Ecuador. The specimens were collected with mist nets, manual capture from animals found dead or dying in the streets, and museological collections. We applied Mann-Whitney U test to analyze differences between males and females, and between guilds. 66 chiropterans were analyzed, distributed in 14 species, where 98.5% presented Pb in its body. The nectarivore guild showed highest Pb concentrations than insectivores and frugivores. In the analysis of sexes, no significant differences were found in soft tissue of Glossophaga soricina, Artibeus lituratus, A. aequatorialis and Molossus molossus. Museological samples made possible to detect Pb in several synanthropic species. Finally, Pb should be considered an emerging threat for bats due its possible genotoxic effects over populations.
{"title":"Cuantificación de Plomo (Pb) en tejidos blandos y óseo de murciélagos (Mammalia: Chiroptera) provenientes de zonas de influencia Urbana en la costa occidental de Ecuador","authors":"Michelle Baquerizo, J. A. Salas","doi":"10.1080/23766808.2021.1982585","DOIUrl":"https://doi.org/10.1080/23766808.2021.1982585","url":null,"abstract":"ABSTRACT Lead (Pb) has generated a worldwide concern for its genotoxic effects on human health, and its ability to be bioaccumulative in ecosystems, but nevertheless, there are no estimates of wildlife from terrestrial habitats in Ecuador. Our objective was to determine the concentration of Pb in soft and bone tissues from bats species collected in areas with urban influence in Guayas province, western Ecuador. The specimens were collected with mist nets, manual capture from animals found dead or dying in the streets, and museological collections. We applied Mann-Whitney U test to analyze differences between males and females, and between guilds. 66 chiropterans were analyzed, distributed in 14 species, where 98.5% presented Pb in its body. The nectarivore guild showed highest Pb concentrations than insectivores and frugivores. In the analysis of sexes, no significant differences were found in soft tissue of Glossophaga soricina, Artibeus lituratus, A. aequatorialis and Molossus molossus. Museological samples made possible to detect Pb in several synanthropic species. Finally, Pb should be considered an emerging threat for bats due its possible genotoxic effects over populations.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47900778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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