Pub Date : 2023-11-16DOI: 10.32800/abc.2023.46.0225
F. J. Zamora‐Camacho
To understand the evolutionary processes involved in the expression of ecologically relevant phenotypical variability it is necessary to disentangle the processes that govern the heredity of said traits. Such is the case of dorsal patterns in the Iberian painted frog, Discoglossus galganoi, which presents both a striped and a spotted morph. Here I studied whether the expression of such patterns is subjected to single-locus Mendelian heredity. I crossed males and females with each pattern in all possible combinations and calculated the percentage of each pattern in the offspring. The proportions obtained were compatible with single-locus Mendelian heredity.
{"title":"Transmission of the polymorphic dorsal pattern of the Iberian painted frog Discoglossus galganoi is compatible with simple Mendelian inheritance","authors":"F. J. Zamora‐Camacho","doi":"10.32800/abc.2023.46.0225","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0225","url":null,"abstract":"To understand the evolutionary processes involved in the expression of ecologically relevant phenotypical variability it is necessary to disentangle the processes that govern the heredity of said traits. Such is the case of dorsal patterns in the Iberian painted frog, Discoglossus galganoi, which presents both a striped and a spotted morph. Here I studied whether the expression of such patterns is subjected to single-locus Mendelian heredity. I crossed males and females with each pattern in all possible combinations and calculated the percentage of each pattern in the offspring. The proportions obtained were compatible with single-locus Mendelian heredity.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"32 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139266616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-10DOI: 10.32800/abc.2023.46.0219
L. Lopes Costa
Confined to a few favorable patches of habitat within a mosaic of physical drivers, many species disappear from human-disturbed beaches. However, mobile species may change their distribution and select more appropriate habitats as a response to disturbance. Ghost crabs are one of the few beach resident animals capable of moving over considerable distances, but usual habitat homogeneity of urban beaches theoretically prevents them from finding refuge. Here, I tested whether access walkways provide a habitat for ghost crabs on four beaches in southeastern Brazil. I counted and measured burrow opening diameter under walkways and in surrounding transects located at various distances from these structures between June 2020 and May 2021. Mean burrow density was three times higher in transects out of walkways than under the walkways. However, burrows were larger and positioned farther from the waterline under walkways. Walkways thus possibly provide protection for ghost crabs from trampling and vehicle traffic in urban beaches and could therefore be applied as an environmental enrichment tool in the management and conservation of sandy beach biodiversity.
{"title":"Walkways as an environmental enrichment tool on sandy beaches? A case study with ghost crabs (Crustacea, Ocypodidae)","authors":"L. Lopes Costa","doi":"10.32800/abc.2023.46.0219","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0219","url":null,"abstract":"Confined to a few favorable patches of habitat within a mosaic of physical drivers, many species disappear from human-disturbed beaches. However, mobile species may change their distribution and select more appropriate habitats as a response to disturbance. Ghost crabs are one of the few beach resident animals capable of moving over considerable distances, but usual habitat homogeneity of urban beaches theoretically prevents them from finding refuge. Here, I tested whether access walkways provide a habitat for ghost crabs on four beaches in southeastern Brazil. I counted and measured burrow opening diameter under walkways and in surrounding transects located at various distances from these structures between June 2020 and May 2021. Mean burrow density was three times higher in transects out of walkways than under the walkways. However, burrows were larger and positioned farther from the waterline under walkways. Walkways thus possibly provide protection for ghost crabs from trampling and vehicle traffic in urban beaches and could therefore be applied as an environmental enrichment tool in the management and conservation of sandy beach biodiversity.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"123 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135138480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.32800/abc.2023.46.0213
M. Bayarlkhagva, B. Ulziibat, B. Gun-Aajav, D. Bazarsad, B. Damdingiin, E. Batmagnai
Gazella subgutturosa, a vulnerable species, is threatened by illegal hunting for meat and sport. The mitochondrial cytochrome c oxidase subunit 1 gene (cox-1) is used as a DNA marker to distinguish mammalian species for the investigation of illegal hunting. In this study, we sequenced a part of the cox-1 gene (709 bp) of six Mongolian G. subgutturosa individuals. Our DNA sequences were clustered in a clade of Gazella which is distinct from other clades of mammalian species in the phylogenetic tree. Our findings suggest that DNA sequences can be useful in the investigation of illegal hunting.
{"title":"Phylogenetic analysis of a region of mitochondrial cox-1 as a DNA barcode marker sequence of Gazella subgutturosa (Goitered gazelle) in Mongolia","authors":"M. Bayarlkhagva, B. Ulziibat, B. Gun-Aajav, D. Bazarsad, B. Damdingiin, E. Batmagnai","doi":"10.32800/abc.2023.46.0213","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0213","url":null,"abstract":"Gazella subgutturosa, a vulnerable species, is threatened by illegal hunting for meat and sport. The mitochondrial cytochrome c oxidase subunit 1 gene (cox-1) is used as a DNA marker to distinguish mammalian species for the investigation of illegal hunting. In this study, we sequenced a part of the cox-1 gene (709 bp) of six Mongolian G. subgutturosa individuals. Our DNA sequences were clustered in a clade of Gazella which is distinct from other clades of mammalian species in the phylogenetic tree. Our findings suggest that DNA sequences can be useful in the investigation of illegal hunting.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"9 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135819058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-19DOI: 10.32800/abc.2023.46.0199
C. Sinkovics, G. Seress, I. Pipoly, E. Vincze, A. Liker
To understand why early broods tend to be more successful than late broods we investigated the nestling diet and reproductive success of great tit pairs that had both a first and a second brood in the same breeding season. We found that in forest habitats great tit parents delivered similar composition and amount of food per nestlings throughout the breeding season, resulting in similar nestling body mass and survival in both first and second broods. In urban habitats, however, although parents provided similar amounts of food to the second broods they tended to deliver fewer caterpillars. In parallel with this, we observed lower nestling survival in second urban broods than in first broods even though the body mass of surviving nestlings was similar to that of the first broods. These findings suggest that although parents produce smaller second broods in both habitats, they are able to compensate for lower food availability in forest habitats but not in urban habitats, thus leading to reduced food quality and lower offspring survival in urban second broods.
{"title":"Comparison of nestling diet between first and second broods of great tits Parus major in urban and forest habitats","authors":"C. Sinkovics, G. Seress, I. Pipoly, E. Vincze, A. Liker","doi":"10.32800/abc.2023.46.0199","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0199","url":null,"abstract":"To understand why early broods tend to be more successful than late broods we investigated the nestling diet and reproductive success of great tit pairs that had both a first and a second brood in the same breeding season. We found that in forest habitats great tit parents delivered similar composition and amount of food per nestlings throughout the breeding season, resulting in similar nestling body mass and survival in both first and second broods. In urban habitats, however, although parents provided similar amounts of food to the second broods they tended to deliver fewer caterpillars. In parallel with this, we observed lower nestling survival in second urban broods than in first broods even though the body mass of surviving nestlings was similar to that of the first broods. These findings suggest that although parents produce smaller second broods in both habitats, they are able to compensate for lower food availability in forest habitats but not in urban habitats, thus leading to reduced food quality and lower offspring survival in urban second broods.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135730046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-05DOI: 10.32800/abc.2023.46.0187
G. A. Collado, M. A. Vidal, C. Torres-Díaz
Invasive species can produce negative effects on native species. We studied the densities of Physa acuta and Potamopyrgus antipodarum, two invasive freshwater snails in Chile, and analyzed the relationship between environmental parameters and the relative abundances of the mollusc community in several ecosystems. Densities of both species were studied in three habitat types (stones, smooth sediment, and vegetation) in the Consuelo Stream, Coquimbo Region. Densities of Potamopyrgus antipodarum were significantly higher on stones, while Physa acuta showed no significant differences between habitats. A canonical correspondence analysis (CCA) demonstrated that both Physa acuta and Potamopyrgus antipodarum were related to oxidation-reduction potential but not to salinity. The results also showed that native mollusc fauna is sparsely represented in the study area, possibly due to the presence of these invaders, although drought, water pollution, and other unstudied anthropogenic factors may also be involved.
{"title":"Spatial distribution of two invasive freshwater snails and environmental correlates of the mollusc community abundance, a case study in Chile","authors":"G. A. Collado, M. A. Vidal, C. Torres-Díaz","doi":"10.32800/abc.2023.46.0187","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0187","url":null,"abstract":"Invasive species can produce negative effects on native species. We studied the densities of Physa acuta and Potamopyrgus antipodarum, two invasive freshwater snails in Chile, and analyzed the relationship between environmental parameters and the relative abundances of the mollusc community in several ecosystems. Densities of both species were studied in three habitat types (stones, smooth sediment, and vegetation) in the Consuelo Stream, Coquimbo Region. Densities of Potamopyrgus antipodarum were significantly higher on stones, while Physa acuta showed no significant differences between habitats. A canonical correspondence analysis (CCA) demonstrated that both Physa acuta and Potamopyrgus antipodarum were related to oxidation-reduction potential but not to salinity. The results also showed that native mollusc fauna is sparsely represented in the study area, possibly due to the presence of these invaders, although drought, water pollution, and other unstudied anthropogenic factors may also be involved.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135482395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-02DOI: 10.32800/abc.2023.46.0173
N. Rosas-Ramos, P. Jurado-Angulo, P. C. Rodríguez-Flores, M. García-Paris
Recent phylogenetic studies of Gammaridae made evident some nomenclatural issues that should be addressed. We discuss the nomenclatural problems caused by the use of the unavailable name Neogammarus Ruffo, 1937 and the designation of type species for Rhipidogammarus Stock, 1971 and Neogammarus Karaman, 1969. Since the type species of these two last names is the same, Gammarus rhipidiophorus Catta, 1878, the ICZN requires that a new objective synonymy be established: Neogammarus Karaman, 1969 = Rhipidogammarus Stock, 1971, syn. nov. This synonymy changes the current general use of these two names, generating a new nomenclatural combination, Neogammarus karamani (Stock, 1971) n. comb. We provide a synonymic list of Neogammarus to facilitate its general application.
{"title":"Nomenclatural problems caused by type species designation in Gammaridae (Amphipoda)","authors":"N. Rosas-Ramos, P. Jurado-Angulo, P. C. Rodríguez-Flores, M. García-Paris","doi":"10.32800/abc.2023.46.0173","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0173","url":null,"abstract":"Recent phylogenetic studies of Gammaridae made evident some nomenclatural issues that should be addressed. We discuss the nomenclatural problems caused by the use of the unavailable name Neogammarus Ruffo, 1937 and the designation of type species for Rhipidogammarus Stock, 1971 and Neogammarus Karaman, 1969. Since the type species of these two last names is the same, Gammarus rhipidiophorus Catta, 1878, the ICZN requires that a new objective synonymy be established: Neogammarus Karaman, 1969 = Rhipidogammarus Stock, 1971, syn. nov. This synonymy changes the current general use of these two names, generating a new nomenclatural combination, Neogammarus karamani (Stock, 1971) n. comb. We provide a synonymic list of Neogammarus to facilitate its general application.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135830934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-28DOI: 10.32800/abc.2023.46.0165
J. Morales
We studied the incidence of the signal crayfish on a population of Margaritifera margaritifera in the Negro River (Zamora, Spain) during the summers of 2019 to 2022. The incidence of predation was assessed as a mortality factor in relation to floods and the hydrology of the river. The crayfish were trapped in a small plot of high pearl mussels density monitored since 2002, and collected each summer since 2019, during which time their abundance increased (65 % in three years). Simultaneously, we counted the shells carried by the floods to the gravel riverbanks. The incidence of floods was stable between 2019 and 2022 (10.3 % to 19.4 % of mortality), while at the bottom of the river the mortality of pearl mussels increased due to predation from 2.7 % to 43.3 %. During the 2022 dry season, 29 pearl mussels that had recently died and whose shell edges were widely gnawed by crayfishes were collected from the plot. The shells appeared bitten only in the contour exposed above the gravel, ruling out the possibility that the marks could be the effect of the scavenging of dead specimens by the crayfish. Low intensity trapping barely affected the crayfish population, since the following year their abundance in the controlled section had recovered.
{"title":"The signal crayfish Pacifastacus leniusculus (Dana, 1852) (Crustacea, Decapoda) is threatening the near future of Margaritifera margaritifera Linnaeus, 1758 (Bivalvia, Unionoida) in the Negro River (NW Zamora, Spain)","authors":"J. Morales","doi":"10.32800/abc.2023.46.0165","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0165","url":null,"abstract":"We studied the incidence of the signal crayfish on a population of Margaritifera margaritifera in the Negro River (Zamora, Spain) during the summers of 2019 to 2022. The incidence of predation was assessed as a mortality factor in relation to floods and the hydrology of the river. The crayfish were trapped in a small plot of high pearl mussels density monitored since 2002, and collected each summer since 2019, during which time their abundance increased (65 % in three years). Simultaneously, we counted the shells carried by the floods to the gravel riverbanks. The incidence of floods was stable between 2019 and 2022 (10.3 % to 19.4 % of mortality), while at the bottom of the river the mortality of pearl mussels increased due to predation from 2.7 % to 43.3 %. During the 2022 dry season, 29 pearl mussels that had recently died and whose shell edges were widely gnawed by crayfishes were collected from the plot. The shells appeared bitten only in the contour exposed above the gravel, ruling out the possibility that the marks could be the effect of the scavenging of dead specimens by the crayfish. Low intensity trapping barely affected the crayfish population, since the following year their abundance in the controlled section had recovered.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-20DOI: 10.32800/abc.2023.46.0177
J. Duarte, M. Á. Farfán
We studied the abundance of red squirrels, a medium-sized forest rodent widely distributed throughout the Palearctic, in the cliffs of Maro-Cerro Gordo (south of Spain, Málaga-Granada), a protected area with a great marine influence. We investigated the abundance of squirrels in this area in relation to two scales: (1) home range, as signs per square meter; and (2) landscape, as active nests per 1 x 1 km UTM grids. We tested the influence of land use and habitat features on the abundance of squirrels. On the home range scale, squirrel activity was higher in mature pines located near cliffs and in pines near freshwater channels. The cliffs hosted the best pine forest patches, and despite being very close to the sea, squirrels often used these as feeding areas but not as areas for building nests. On the landscape scale, squirrel nests were rarer in grids with more herbaceous crops and were more abundant in grids with longer freshwater streams. These results suggest that the squirrels in this area may have adapted to life at this site and to the marine influence via a differential use of habitat. The squirrels' use of the best feeding areas suggests saline stress is counteracted by establishing nests in humid areas away from cliffs.
我们研究了红松鼠的数量，红松鼠是一种中等大小的森林啮齿动物，广泛分布在整个古北极地区，在Maro-Cerro Gordo(西班牙南部，Málaga-Granada)的悬崖上，这是一个受海洋影响很大的保护区。我们调查了该地区松鼠的丰度与两个尺度的关系:(1)家园范围，作为每平方米的标志;(2)景观，每1 x 1 km UTM网格作为活动巢。我们测试了土地利用和栖息地特征对松鼠数量的影响。在原生地尺度上，靠近悬崖的成熟松林和靠近淡水河道的松林松鼠活动较高。悬崖上有最好的松林，尽管离海很近，松鼠经常把这些地方当作觅食区，而不是筑巢区。在景观尺度上，在草本作物较多的网格中，松鼠巢较少，而在淡水溪流较长的网格中，松鼠巢较多。这些结果表明，该地区的松鼠可能已经适应了该地点的生活，并通过对栖息地的不同利用来适应海洋的影响。松鼠对最佳觅食区域的使用表明，通过在远离悬崖的潮湿地区筑巢来抵消盐胁迫。
{"title":"Red squirrel Sciurus vulgaris abundance in coastal cliffs in the South of Spain","authors":"J. Duarte, M. Á. Farfán","doi":"10.32800/abc.2023.46.0177","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0177","url":null,"abstract":"We studied the abundance of red squirrels, a medium-sized forest rodent widely distributed throughout the Palearctic, in the cliffs of Maro-Cerro Gordo (south of Spain, Málaga-Granada), a protected area with a great marine influence. We investigated the abundance of squirrels in this area in relation to two scales: (1) home range, as signs per square meter; and (2) landscape, as active nests per 1 x 1 km UTM grids. We tested the influence of land use and habitat features on the abundance of squirrels. On the home range scale, squirrel activity was higher in mature pines located near cliffs and in pines near freshwater channels. The cliffs hosted the best pine forest patches, and despite being very close to the sea, squirrels often used these as feeding areas but not as areas for building nests. On the landscape scale, squirrel nests were rarer in grids with more herbaceous crops and were more abundant in grids with longer freshwater streams. These results suggest that the squirrels in this area may have adapted to life at this site and to the marine influence via a differential use of habitat. The squirrels' use of the best feeding areas suggests saline stress is counteracted by establishing nests in humid areas away from cliffs.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136379044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-08DOI: 10.32800/abc.2023.46.0155
D. Villanúa, X. Cabodevilla, J. Ardaiz, A. Lizárraga, A. Zufiaurre
We analyzed changes in the composition of the community of birds of prey and corvids in a rainfed agrosystem after the transformation of 37.2 % of the sampled area into irrigated land between 2005 and 2020. We sampled 57 transects (372 km per year) and fitted generalized linear mixed models (GLMM) to study changes in species occurrence. Our results showed that specific richness and the Shannon index did not vary significantly between rainfed and irrigated transects, but there was a certain positive trend when comparing the years 2005 and 2020. Regarding the differences detected for each species, the occurrence of Montagu’s harrier Circus pygargus, hen harrier Circus cyaneus, Eurasian short-toed eagle Circaetus gallicus, griffon vulture Gyps fulvus and carrion crow Corvus corone was significantly lower in irrigated land than in rainfed land, while magpie Pica pica, Western marsh harrier Circus aeruginosus, common kestrel Falco tinnunculus and black kite Milvus migrans showed a significantly higher occurrence in the irrigated transects. In addition, our findings confirm a significant decrease in occurrence between 2005 and 2020 both in rainfed and irrigated areas for Montagu’s harrier, hen harrier and magpie, while Western marsh harrier, golden eagle Aquila chrysaetos, common buzzard Buteo buteo, red kite Milvus milvus, griffon vulture Gyps fulvus, red-billed chough Pyrrhocorax pyrrhocorax and Western jackdaw Coloeus monedula were detected significantly more frequently in 2020 than in 2005. These results suggest that assessment of the impact of a new irrigation system should focus on the most characteristic species of rainfed agrosystems because the apparently positive effect on other species, equally protected but more generalist, may mask the real effect on conservation.
{"title":"Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem","authors":"D. Villanúa, X. Cabodevilla, J. Ardaiz, A. Lizárraga, A. Zufiaurre","doi":"10.32800/abc.2023.46.0155","DOIUrl":"https://doi.org/10.32800/abc.2023.46.0155","url":null,"abstract":"We analyzed changes in the composition of the community of birds of prey and corvids in a rainfed agrosystem after the transformation of 37.2 % of the sampled area into irrigated land between 2005 and 2020. We sampled 57 transects (372 km per year) and fitted generalized linear mixed models (GLMM) to study changes in species occurrence. Our results showed that specific richness and the Shannon index did not vary significantly between rainfed and irrigated transects, but there was a certain positive trend when comparing the years 2005 and 2020. Regarding the differences detected for each species, the occurrence of Montagu’s harrier Circus pygargus, hen harrier Circus cyaneus, Eurasian short-toed eagle Circaetus gallicus, griffon vulture Gyps fulvus and carrion crow Corvus corone was significantly lower in irrigated land than in rainfed land, while magpie Pica pica, Western marsh harrier Circus aeruginosus, common kestrel Falco tinnunculus and black kite Milvus migrans showed a significantly higher occurrence in the irrigated transects. In addition, our findings confirm a significant decrease in occurrence between 2005 and 2020 both in rainfed and irrigated areas for Montagu’s harrier, hen harrier and magpie, while Western marsh harrier, golden eagle Aquila chrysaetos, common buzzard Buteo buteo, red kite Milvus milvus, griffon vulture Gyps fulvus, red-billed chough Pyrrhocorax pyrrhocorax and Western jackdaw Coloeus monedula were detected significantly more frequently in 2020 than in 2005. These results suggest that assessment of the impact of a new irrigation system should focus on the most characteristic species of rainfed agrosystems because the apparently positive effect on other species, equally protected but more generalist, may mask the real effect on conservation.","PeriodicalId":49107,"journal":{"name":"Animal Biodiversity and Conservation","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42728150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-31DOI: 10.32800/abc.2023.46.0147
H. Toni, L. Somadon, P. P. Ahoudji, C. Kénou, B. Djossa
The mona monkey Cercopithecus mona Schreber, 1774 is an arboreal and diurnal species occurring in some forests in Benin. The present study determined the feeding ecology of the species in the Gnanhouizounmè community forest, a forest fragment in Southern Benin. The ad libitum observation method was used to collect data during the minor wet and the major dry seasons. Descriptive statistics, proportion comparison tests, and diversity indices were used to analyse data. Results showed that the mona monkey foraged on 22 plant species in the study forest, with Ceiba pentandra, Dialium guineense, Elaeis guineensis and Spondia monbin constituting its major diet. Three species of leguminous plants were the most common food type. Fruits, both mature and immature, were the top food item in the diet, while other items were leaves, buds, tubers, stalks and flowers. Dietary diversity was low (H = 2.09 in the wet season, H = 1.74 in the dry season) with a low similarity between the two seasons (Morisita–Horn's index = 0.31). In forest fragments, the mona monkey has adapted to feed on few plant species and adjusts its diet to resources available each season. Plants consumed by this species should be taken into account in future tree-planting campaigns for the sustainable conservation of these monkeys in the study area.
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