Pub Date : 2022-07-14DOI: 10.1080/23766808.2022.2098575
M. Bulgarella, Alejandro E. Mieles, Jacqueline Rodríguez, Yesenia Campaña, Georgia M. Richardson, R. Keyzers, C. Causton, P. J. Lester
ABSTRACT It is estimated that more than 500 species of insects have been introduced to the Galápagos Islands via human activities. One of these insect invaders is the yellow paper wasp, Polistes versicolor (Olivier) (Hymenoptera: Vespidae), a social wasp native to continental South America. In Galápagos, these wasps are voracious predators of insect larvae, compete with native species for insect prey or for floral resources and are a human nuisance. Wasp suppression methods currently in use are inefficient and attract non-target species, calling for the development of species-specific attractants that can be used in baits to lure and kill wasps. To evaluate the potential for using wasp semiochemicals in baits, we determined the biochemical composition of the head, thorax, Dufour’s and venom glands of P. versicolor foragers via gas chromatography/mass spectrometry (GC/MS). Male and female wasps were tested for behavioral responses to body segment extracts from both sexes. Female body extracts consistently elicited more behavioral responses in both male and female wasps than male extracts. Females reacted to female head, thorax and abdomen (the Dufour’s and venom glands are located in the abdomen) extracts, whereas males reacted significantly to female head and thorax extracts. One male body extract, the head, elicited two significant behaviors: female wasps groomed more often, and males touched the filter paper more often compared to the blank control. Head extracts consistently changed the behavior of female and male wasps and, together with female thorax extracts, have potential as species-specific lures for yellow paper wasps. Heads were mainly composed of hydrocarbon lipids and oleamide, a ligand for odorant-binding proteins. The thorax consisted of fatty aldehydes, long-chain alkanes and fatty amide lipids. Field trials of blends of these compounds in high wasp density areas of Galápagos are the next step to confirm if any of these compounds are attractive to P. versicolor. GRAPHICAL ABSTRACT The yellow paper wasp, Polistes versicolor, is an invasive species in the Galápagos Islands. In addition to its ecological impact, this wasp is a nuisance to residents and visitors alike as they affect tourism and activities in human settlements. We studied the biochemical composition and behavior of P. versicolor wasps to find attractants (sex or aggregation pheromones) useful for developing baits or lures to control this pest. Panel a shows a P. versicolor nest built alongside a touristic trail, Garrapatero beach, Santa Cruz Island, Galápagos. Panel b shows the location of the glands and body parts analyzed. Panel c shows a pan trap filled with soapy water, one of the only control methods currently in use in the Galápagos Islands.
{"title":"Integrating biochemical and behavioral approaches to develop a bait to manage the invasive yellow paper wasp Polistes versicolor (Hymenoptera, Vespidae) in the Galápagos Islands","authors":"M. Bulgarella, Alejandro E. Mieles, Jacqueline Rodríguez, Yesenia Campaña, Georgia M. Richardson, R. Keyzers, C. Causton, P. J. Lester","doi":"10.1080/23766808.2022.2098575","DOIUrl":"https://doi.org/10.1080/23766808.2022.2098575","url":null,"abstract":"ABSTRACT It is estimated that more than 500 species of insects have been introduced to the Galápagos Islands via human activities. One of these insect invaders is the yellow paper wasp, Polistes versicolor (Olivier) (Hymenoptera: Vespidae), a social wasp native to continental South America. In Galápagos, these wasps are voracious predators of insect larvae, compete with native species for insect prey or for floral resources and are a human nuisance. Wasp suppression methods currently in use are inefficient and attract non-target species, calling for the development of species-specific attractants that can be used in baits to lure and kill wasps. To evaluate the potential for using wasp semiochemicals in baits, we determined the biochemical composition of the head, thorax, Dufour’s and venom glands of P. versicolor foragers via gas chromatography/mass spectrometry (GC/MS). Male and female wasps were tested for behavioral responses to body segment extracts from both sexes. Female body extracts consistently elicited more behavioral responses in both male and female wasps than male extracts. Females reacted to female head, thorax and abdomen (the Dufour’s and venom glands are located in the abdomen) extracts, whereas males reacted significantly to female head and thorax extracts. One male body extract, the head, elicited two significant behaviors: female wasps groomed more often, and males touched the filter paper more often compared to the blank control. Head extracts consistently changed the behavior of female and male wasps and, together with female thorax extracts, have potential as species-specific lures for yellow paper wasps. Heads were mainly composed of hydrocarbon lipids and oleamide, a ligand for odorant-binding proteins. The thorax consisted of fatty aldehydes, long-chain alkanes and fatty amide lipids. Field trials of blends of these compounds in high wasp density areas of Galápagos are the next step to confirm if any of these compounds are attractive to P. versicolor. GRAPHICAL ABSTRACT The yellow paper wasp, Polistes versicolor, is an invasive species in the Galápagos Islands. In addition to its ecological impact, this wasp is a nuisance to residents and visitors alike as they affect tourism and activities in human settlements. We studied the biochemical composition and behavior of P. versicolor wasps to find attractants (sex or aggregation pheromones) useful for developing baits or lures to control this pest. Panel a shows a P. versicolor nest built alongside a touristic trail, Garrapatero beach, Santa Cruz Island, Galápagos. Panel b shows the location of the glands and body parts analyzed. Panel c shows a pan trap filled with soapy water, one of the only control methods currently in use in the Galápagos Islands.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"271 - 280"},"PeriodicalIF":0.9,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47829037","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 : 2022-07-14DOI: 10.1080/23766808.2022.2097109
A. Valenzuela, F. Gómez, J. Acosta
ABSTRACT The northwestern region of Argentina has several gaps in ichthyogeographic knowledge and there are still bodies of water without records of the species that inhabit them. When planning mitigation projects or conservation or management actions, little knowledge of the biology of a species presents itself as a restriction. Therefore, the objective is to know the reproductive biology of the torrent catfish (H. macraei) in the Natural Protected Area La Ciénaga, San Juan, with the purpose of generating basic information as a tool for the future management of these populations. The torrent catfish, Hatcheria macraei (Girard, 1855) is a Siluriformes that belongs to the Trichomycteridae family, it is a rheophilic and phototactic negative species, which is characterized by living in cold and well-oxygenated waters with sandy and rocky substrates. In a period of one year, fecundity, reproductive potential, minimum reproductive size were determined, sexual dimorphism was evaluated, and the state of gonadal development was described. It was determined that the species presents an opportunistic strategy, presenting a prolonged reproduction period from October to November.
{"title":"Biología reproductiva de Hatcheria macraei (bagre de torrente) en el Área Natural Protegida la Ciénaga, en el centro oeste de Argentina","authors":"A. Valenzuela, F. Gómez, J. Acosta","doi":"10.1080/23766808.2022.2097109","DOIUrl":"https://doi.org/10.1080/23766808.2022.2097109","url":null,"abstract":"ABSTRACT The northwestern region of Argentina has several gaps in ichthyogeographic knowledge and there are still bodies of water without records of the species that inhabit them. When planning mitigation projects or conservation or management actions, little knowledge of the biology of a species presents itself as a restriction. Therefore, the objective is to know the reproductive biology of the torrent catfish (H. macraei) in the Natural Protected Area La Ciénaga, San Juan, with the purpose of generating basic information as a tool for the future management of these populations. The torrent catfish, Hatcheria macraei (Girard, 1855) is a Siluriformes that belongs to the Trichomycteridae family, it is a rheophilic and phototactic negative species, which is characterized by living in cold and well-oxygenated waters with sandy and rocky substrates. In a period of one year, fecundity, reproductive potential, minimum reproductive size were determined, sexual dimorphism was evaluated, and the state of gonadal development was described. It was determined that the species presents an opportunistic strategy, presenting a prolonged reproduction period from October to November.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"281 - 291"},"PeriodicalIF":0.9,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41892615","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 : 2022-07-06DOI: 10.1080/23766808.2022.2093816
Dennisse Ruelas, Víctor Pacheco
RESUMEN Los murciélagos colicortos Carollia brevicaudum y C. perspicillata son dos de las especies de filostómidos más abundantes y ampliamente distribuidos en el Neotrópico. Debido a esto, diversos autores han encontrado variación intraespecífica a lo largo de su distribución, principalmente en tamaño corporal y coloración. Dado a que no hay un consenso en la magnitud de la variación intraespecífica, en este estudio evaluamos los patrones de variación de siete poblaciones de C. brevicaudum (n = 185) y C. perspicillata (n = 190) de poblaciones de Perú y Ecuador. Las poblaciones se delimitaron en base a las principales cuencas, río Amazonas y Andes. Se emplearon 26 medidas cráneo-mandibulares y se aplicaron análisis univariados, multivariados y de conglomerados. Nuestros resultados sugieren que hay diferencias morfométricas significativas entre determinados pares de poblaciones de ambas especies, pero ninguna es soportada consistentemente por todos los análisis. La amplia superposición de las poblaciones evaluadas en ambas especies sugiere una complejidad morfológica no relacionada con las geografías evaluadas.
{"title":"Variación intraespecífica de Carollia brevicaudum y Carollia perspicillata (Phyllostomidae: Chiroptera) de Perú y Ecuador","authors":"Dennisse Ruelas, Víctor Pacheco","doi":"10.1080/23766808.2022.2093816","DOIUrl":"https://doi.org/10.1080/23766808.2022.2093816","url":null,"abstract":"RESUMEN Los murciélagos colicortos Carollia brevicaudum y C. perspicillata son dos de las especies de filostómidos más abundantes y ampliamente distribuidos en el Neotrópico. Debido a esto, diversos autores han encontrado variación intraespecífica a lo largo de su distribución, principalmente en tamaño corporal y coloración. Dado a que no hay un consenso en la magnitud de la variación intraespecífica, en este estudio evaluamos los patrones de variación de siete poblaciones de C. brevicaudum (n = 185) y C. perspicillata (n = 190) de poblaciones de Perú y Ecuador. Las poblaciones se delimitaron en base a las principales cuencas, río Amazonas y Andes. Se emplearon 26 medidas cráneo-mandibulares y se aplicaron análisis univariados, multivariados y de conglomerados. Nuestros resultados sugieren que hay diferencias morfométricas significativas entre determinados pares de poblaciones de ambas especies, pero ninguna es soportada consistentemente por todos los análisis. La amplia superposición de las poblaciones evaluadas en ambas especies sugiere una complejidad morfológica no relacionada con las geografías evaluadas.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"253 - 266"},"PeriodicalIF":0.9,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42621164","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 : 2022-06-15DOI: 10.1080/23766808.2022.2087282
Jazmín Escobar-Luján, S. Castaño-Quintero, F. Villalobos, A. Lira‐Noriega, X. Chiappa-Carrara, Carlos Yáñez-Arenas
ABSTRACT The deviation of expected relationships between taxonomic (TD), phylogenetic (PD), and functional (FD) diversity may inform about some processes (speciation, extinction, competition, and migration) responsible for current biodiversity patterns. We studied the relationship between different dimensions of bird diversity (TD, PD, and FD) of the Yucatan Peninsula (YP) in a context of future climate change. We used ecological niche models to predict the current and future potential distribution of 257 bird species of the YP and estimate their TD, PD, and FD. We calculated a standardized effect size of PD (SES.PD) and FD (SES.FD) to provide an estimation of phylogenetic and functional diversity, independent from species richness. Finally, we evaluated the effectiveness of the system of PAs comparing the observed diversity values in each PA versus what is expected for a null model. We found a positive correlation between PD and TD, and a negative correlation between FD and TD in the current and future scenarios. Finally, we found that none of the PAs protect more diversity of birds than expected by a null model. Our results suggest that macroevolutionary processes have played an important role in the composition of the current Yucatan Peninsula avian assemblages. Our assessment of the effectiveness of the PAs suggests the need to adopt an integrative approach to biodiversity conservation in the YP.
{"title":"Current and future geographic patterns of bird diversity dimensions of the Yucatan Peninsula and their representativeness in natural protected areas","authors":"Jazmín Escobar-Luján, S. Castaño-Quintero, F. Villalobos, A. Lira‐Noriega, X. Chiappa-Carrara, Carlos Yáñez-Arenas","doi":"10.1080/23766808.2022.2087282","DOIUrl":"https://doi.org/10.1080/23766808.2022.2087282","url":null,"abstract":"ABSTRACT The deviation of expected relationships between taxonomic (TD), phylogenetic (PD), and functional (FD) diversity may inform about some processes (speciation, extinction, competition, and migration) responsible for current biodiversity patterns. We studied the relationship between different dimensions of bird diversity (TD, PD, and FD) of the Yucatan Peninsula (YP) in a context of future climate change. We used ecological niche models to predict the current and future potential distribution of 257 bird species of the YP and estimate their TD, PD, and FD. We calculated a standardized effect size of PD (SES.PD) and FD (SES.FD) to provide an estimation of phylogenetic and functional diversity, independent from species richness. Finally, we evaluated the effectiveness of the system of PAs comparing the observed diversity values in each PA versus what is expected for a null model. We found a positive correlation between PD and TD, and a negative correlation between FD and TD in the current and future scenarios. Finally, we found that none of the PAs protect more diversity of birds than expected by a null model. Our results suggest that macroevolutionary processes have played an important role in the composition of the current Yucatan Peninsula avian assemblages. Our assessment of the effectiveness of the PAs suggests the need to adopt an integrative approach to biodiversity conservation in the YP.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"242 - 252"},"PeriodicalIF":0.9,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46691370","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 : 2022-06-10DOI: 10.1080/23766808.2022.2076784
Vanessa E Luzuriaga-Aveiga, D. Cisneros-Heredia
ABSTRACT Tropical dry forests are among the most threatened and yet the most biodiverse Neotropical ecosystems. However, current patterns of biological occupancy in these forests remain poorly studied. Here, we document the diversity, patterns of seasonal turnover and change of species composition over time of birds in a highly exploited but protected tropical dry forest of southwestern Ecuador, Bosque Protector Puyango. Using a combination of mist netting, song recording and direct observations, we surveyed the study site over a 2-month period of fieldwork during both the dry and rainy seasons. We then performed a literature review of the species reported in this site and compared the changes in composition over time using a historical survey. One hundred sixty-one species of birds belonging to 40 families were recorded inside the area. One hundred and six species were found in this survey and 55 were recovered from the literature. Seasonality did not significantly affect species abundance and richness; however, species dominance changed notably. Although the overall species richness of the site has been maintained, we found an overwhelming change of species composition during the last two decades in this forest. Our results show that this highly threatened forest still hosts a unique high avian diversity. Conservation actions should be encouraged in the region, motivating the local communities to develop non-extractive economic practices, such as birdwatching and ecotourism.
{"title":"Seasonal turnover of avian community assembly in a highly fragmented Tumbesian dry forest of southwestern Ecuador","authors":"Vanessa E Luzuriaga-Aveiga, D. Cisneros-Heredia","doi":"10.1080/23766808.2022.2076784","DOIUrl":"https://doi.org/10.1080/23766808.2022.2076784","url":null,"abstract":"ABSTRACT Tropical dry forests are among the most threatened and yet the most biodiverse Neotropical ecosystems. However, current patterns of biological occupancy in these forests remain poorly studied. Here, we document the diversity, patterns of seasonal turnover and change of species composition over time of birds in a highly exploited but protected tropical dry forest of southwestern Ecuador, Bosque Protector Puyango. Using a combination of mist netting, song recording and direct observations, we surveyed the study site over a 2-month period of fieldwork during both the dry and rainy seasons. We then performed a literature review of the species reported in this site and compared the changes in composition over time using a historical survey. One hundred sixty-one species of birds belonging to 40 families were recorded inside the area. One hundred and six species were found in this survey and 55 were recovered from the literature. Seasonality did not significantly affect species abundance and richness; however, species dominance changed notably. Although the overall species richness of the site has been maintained, we found an overwhelming change of species composition during the last two decades in this forest. Our results show that this highly threatened forest still hosts a unique high avian diversity. Conservation actions should be encouraged in the region, motivating the local communities to develop non-extractive economic practices, such as birdwatching and ecotourism.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"229 - 241"},"PeriodicalIF":0.9,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46455865","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 : 2022-05-10DOI: 10.1080/23766808.2022.2071405
Samuel Renner, E. Périco, M. Dalzochio, G. Sahlén
ABSTRACT We surveyed dragonflies (Odonata) at 87 sites in the anthropologically modified Pampa biome of southern Brazil to evaluate how regionally rare and common species form species assemblages in habitats with different water physiochemistry, habitat structures, and other environmental variables. We classified 9 out of the 90 species encountered as regionally common and 59 as regionally rare. A discriminant analysis confirmed that localities with only a few common species were characteristic in the set of rare species present, while localities housing more common species showed no clear pattern. A PCA revealed that a subset of the common species were strongly positively associated with water temperature, turbidity, dissolved O2 and pH but negatively associated with desertification. In contrast, rare species were positively associated with grassland habitat, but negatively with agriculture, salinity, and conductivity. In general, the associations of the rare species were weaker than those of common species. Finally, a correlation suggested that sites with six or more common species present had a reduced number of rare species compared to sites with fewer common species. It is possible that common species reduce the available niche space for weaker competitors among the rare species. We conclude that the original species assemblages in the biome may have been species poor with few regionally common species. Current anthropogenic change has increased the number of common species, which in turn has negative effects on the survival possibilities of rare species.
{"title":"The balance of common vs. rare: a study of dragonfly (Insecta: Odonata) assemblages in the Brazilian Pampa biome","authors":"Samuel Renner, E. Périco, M. Dalzochio, G. Sahlén","doi":"10.1080/23766808.2022.2071405","DOIUrl":"https://doi.org/10.1080/23766808.2022.2071405","url":null,"abstract":"ABSTRACT We surveyed dragonflies (Odonata) at 87 sites in the anthropologically modified Pampa biome of southern Brazil to evaluate how regionally rare and common species form species assemblages in habitats with different water physiochemistry, habitat structures, and other environmental variables. We classified 9 out of the 90 species encountered as regionally common and 59 as regionally rare. A discriminant analysis confirmed that localities with only a few common species were characteristic in the set of rare species present, while localities housing more common species showed no clear pattern. A PCA revealed that a subset of the common species were strongly positively associated with water temperature, turbidity, dissolved O2 and pH but negatively associated with desertification. In contrast, rare species were positively associated with grassland habitat, but negatively with agriculture, salinity, and conductivity. In general, the associations of the rare species were weaker than those of common species. Finally, a correlation suggested that sites with six or more common species present had a reduced number of rare species compared to sites with fewer common species. It is possible that common species reduce the available niche space for weaker competitors among the rare species. We conclude that the original species assemblages in the biome may have been species poor with few regionally common species. Current anthropogenic change has increased the number of common species, which in turn has negative effects on the survival possibilities of rare species.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"188 - 199"},"PeriodicalIF":0.9,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44814734","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 : 2022-04-26DOI: 10.1080/23766808.2022.2061820
Gabriel Laufer, E. González, A. Cravino, Noelia Gobel, Felipe Montenegro, Gonzalo Nión, J. Velázquez, A. Valenzuela
ABSTRACT The American mink (Neovison vison) has been introduced for fur farming into several countries around the world. In southern South America, although invasive populations have established in Argentina and Chile, no feral minks have been recorded in the Pampas Biome to date. We report a potentially new biological invasion in Uruguay, presenting observations, pictures and a museum specimen of feral minks in the locality Melilla, Montevideo Department, which probably escaped or were released from a local fur farm. We obtained 35 mink records between 2010 and 2020, mostly close to the fur farm, within a 2.5 km radius. Our report provides the northernmost mink records in South America, being the first in the Pampas Biome. American mink is a feared invader in most of the sites where it has been introduced, and therefore these new records are important mainly to plan and apply management interventions.
{"title":"A potential threat to the Pampas Biome: the introduction of American mink, Neovison vison (Schreber, 1777) in Uruguay","authors":"Gabriel Laufer, E. González, A. Cravino, Noelia Gobel, Felipe Montenegro, Gonzalo Nión, J. Velázquez, A. Valenzuela","doi":"10.1080/23766808.2022.2061820","DOIUrl":"https://doi.org/10.1080/23766808.2022.2061820","url":null,"abstract":"ABSTRACT The American mink (Neovison vison) has been introduced for fur farming into several countries around the world. In southern South America, although invasive populations have established in Argentina and Chile, no feral minks have been recorded in the Pampas Biome to date. We report a potentially new biological invasion in Uruguay, presenting observations, pictures and a museum specimen of feral minks in the locality Melilla, Montevideo Department, which probably escaped or were released from a local fur farm. We obtained 35 mink records between 2010 and 2020, mostly close to the fur farm, within a 2.5 km radius. Our report provides the northernmost mink records in South America, being the first in the Pampas Biome. American mink is a feared invader in most of the sites where it has been introduced, and therefore these new records are important mainly to plan and apply management interventions.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"178 - 182"},"PeriodicalIF":0.9,"publicationDate":"2022-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45646697","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 : 2022-04-17DOI: 10.1080/23766808.2022.2064694
Monshie Briceño, Julio E. Mérida, Anthonie Andino-Mazariegos, G. Cruz
ABSTRACT We added a new record of a freshwater sponge at the family level from Honduras. The presence of the Dosilia genus in Central America was confirmed, extending its distribution by 890 linear miles south of Mexico. This constitutes a new southern range extension of D. radiospiculata from the Nearctic to Neotropical region. The specimen was collected from the Pacific slope of Honduras. Although sponges constitute an important element of a freshwater ecosystem, environmental pressures and contamination of rivers or other aquatic environments, where they exist, have not been considered under any category of protection.
{"title":"A new neotropical and southernmost distributional record of freshwater sponge dosilia radiospiculata (Mills, 1888) (Porifera: Demospongie: Spongillidae) from Honduras","authors":"Monshie Briceño, Julio E. Mérida, Anthonie Andino-Mazariegos, G. Cruz","doi":"10.1080/23766808.2022.2064694","DOIUrl":"https://doi.org/10.1080/23766808.2022.2064694","url":null,"abstract":"ABSTRACT We added a new record of a freshwater sponge at the family level from Honduras. The presence of the Dosilia genus in Central America was confirmed, extending its distribution by 890 linear miles south of Mexico. This constitutes a new southern range extension of D. radiospiculata from the Nearctic to Neotropical region. The specimen was collected from the Pacific slope of Honduras. Although sponges constitute an important element of a freshwater ecosystem, environmental pressures and contamination of rivers or other aquatic environments, where they exist, have not been considered under any category of protection.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"183 - 187"},"PeriodicalIF":0.9,"publicationDate":"2022-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42240140","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 : 2022-04-17DOI: 10.1080/23766808.2022.2061299
G. L. Zuercher, L. Jackson, D. Edds, J. Miller, S. Satterlee, Alan Butler, F. R. Pinto, Sixto Fernandez, Myriam C. Velazquez, D. Koch, Phylicia Schwartz
ABSTRACT The upper Jejuí River is a major tributary of the Paraguay River in eastern Paraguay and is the principal drainage for the Mbaracayú Forest Biosphere Reserve. Despite the international significance of the biosphere reserve and detailed documentation of its terrestrial fauna and flora, the fish fauna in its streams remains relatively unknown, with 48 species previously recorded. We sampled 35 sites within the biosphere reserve over five years (2007–2011) to assess the richness of its ichthyofauna. These surveys yielded a new total of 105 known species for the biosphere reserve, including two newly-recorded orders, Gymnotiformes and Cyprinodontiformes, and 14 newly-recorded families. Fish community composition resembled that of previously-reported fish communities from the Paraguay River drainage, with characiforms and siluriforms comprising the majority of the species (57.1% and 31.4%, respectively). Post hoc analyses showed significantly greater ichthyofaunal diversity at sites within the Mbaracayú Forest Nature Reserve, a core protected forest area within the biosphere reserve, compared to areas outside the nature reserve, suggesting a negative impact from deforestation and land conversion on fish assemblages in these headwater streams. Broad regional deforestation places greater emphasis on important management decisions that will protect current biodiversity.
{"title":"Ichthyofaunal diversity in the upper Jejuí River watershed in eastern Paraguay","authors":"G. L. Zuercher, L. Jackson, D. Edds, J. Miller, S. Satterlee, Alan Butler, F. R. Pinto, Sixto Fernandez, Myriam C. Velazquez, D. Koch, Phylicia Schwartz","doi":"10.1080/23766808.2022.2061299","DOIUrl":"https://doi.org/10.1080/23766808.2022.2061299","url":null,"abstract":"ABSTRACT The upper Jejuí River is a major tributary of the Paraguay River in eastern Paraguay and is the principal drainage for the Mbaracayú Forest Biosphere Reserve. Despite the international significance of the biosphere reserve and detailed documentation of its terrestrial fauna and flora, the fish fauna in its streams remains relatively unknown, with 48 species previously recorded. We sampled 35 sites within the biosphere reserve over five years (2007–2011) to assess the richness of its ichthyofauna. These surveys yielded a new total of 105 known species for the biosphere reserve, including two newly-recorded orders, Gymnotiformes and Cyprinodontiformes, and 14 newly-recorded families. Fish community composition resembled that of previously-reported fish communities from the Paraguay River drainage, with characiforms and siluriforms comprising the majority of the species (57.1% and 31.4%, respectively). Post hoc analyses showed significantly greater ichthyofaunal diversity at sites within the Mbaracayú Forest Nature Reserve, a core protected forest area within the biosphere reserve, compared to areas outside the nature reserve, suggesting a negative impact from deforestation and land conversion on fish assemblages in these headwater streams. Broad regional deforestation places greater emphasis on important management decisions that will protect current biodiversity.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"167 - 177"},"PeriodicalIF":0.9,"publicationDate":"2022-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41997538","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 : 2022-04-12DOI: 10.1080/23766808.2022.2061292
Boris Marioni, W. Magnusson, R. Vogt, F. Villamarín
ABSTRACT Dwarf caimans (Alligatoridae: Paleosuchus palpebrosus and Paleosuchus trigonatus), are small crocodilians exhibiting cryptic behaviour and complex habitat use that occur throughout the Amazon region. Our goals were to evaluate individual home range, habitat occupancy and movement patterns where they occur in sympatry in relation to seasonal water-level variation. We tracked five P. palpebrosus and seven P. trigonatus using VHS radio transmitters along the shores of two streams directly influenced by the flooding pulse of the Purus River. Paleosuchus palpebrosus individuals moved greater distances on a daily basis and had larger home ranges than P. trigonatus, and the species had different responses to increases in water levels. Paleosuchus palpebrosus moved into flooded forests, as do their principle prey species. Conversely, larger P. trigonatus individuals usually remained near the main stream, and were relatively sedentary. Intraspecific home-range overlap was higher than interspecific overlap in both species. Thus, habitat occupancy patterns as a function of water-level variation might facilitate coexistence of the two species of dwarf caimans in the same location. This study shows that when living in sympatry under a seasonal flooding regime, Paleosuchus species show a degree of habitat partitioning evidenced by different daily movement rates, home-range sizes and home-range locations.
{"title":"Home range and movement patterns of male dwarf caimans (Paleosuchus palpebrosus and Paleosuchus trigonatus) living in sympatry in Amazonian floodplain streams","authors":"Boris Marioni, W. Magnusson, R. Vogt, F. Villamarín","doi":"10.1080/23766808.2022.2061292","DOIUrl":"https://doi.org/10.1080/23766808.2022.2061292","url":null,"abstract":"ABSTRACT Dwarf caimans (Alligatoridae: Paleosuchus palpebrosus and Paleosuchus trigonatus), are small crocodilians exhibiting cryptic behaviour and complex habitat use that occur throughout the Amazon region. Our goals were to evaluate individual home range, habitat occupancy and movement patterns where they occur in sympatry in relation to seasonal water-level variation. We tracked five P. palpebrosus and seven P. trigonatus using VHS radio transmitters along the shores of two streams directly influenced by the flooding pulse of the Purus River. Paleosuchus palpebrosus individuals moved greater distances on a daily basis and had larger home ranges than P. trigonatus, and the species had different responses to increases in water levels. Paleosuchus palpebrosus moved into flooded forests, as do their principle prey species. Conversely, larger P. trigonatus individuals usually remained near the main stream, and were relatively sedentary. Intraspecific home-range overlap was higher than interspecific overlap in both species. Thus, habitat occupancy patterns as a function of water-level variation might facilitate coexistence of the two species of dwarf caimans in the same location. This study shows that when living in sympatry under a seasonal flooding regime, Paleosuchus species show a degree of habitat partitioning evidenced by different daily movement rates, home-range sizes and home-range locations.","PeriodicalId":36863,"journal":{"name":"Neotropical Biodiversity","volume":"8 1","pages":"156 - 166"},"PeriodicalIF":0.9,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46463915","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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