Pub Date : 2022-11-14DOI: 10.5424/sjar/2022204-19634
Agostina Giacobino, A. Pacini, A. Molineri, Natalia Bulacio-Cagnolo, J. Merke, E. Orellano, Mónica Gaggiotii, M. Signorini
Aim of study: The aim of this study was to assess the impact of the mite control strategies combined with nutritional management on honey bee colony dynamics and survival during winter, the following spring, and summer. Area of study: Santa Fe province in central Argentina. Material and methods: We set two apiaries with 40 colonies each and fed one apiary with high fructose corn syrup (HFCS) and the other with sucrose syrup (SS). Within each apiary, we treated half the colonies against Varroa mites and half of these treated colonies also received a pollen patty. The other half of the colonies remained untreated and did not received pollen patties. All colonies were sampled for Varroa infestation level, Nosema ceranae abundance and colony strength seven times during a year (from summer 2016 to autumn 2017). We computed autumn mite invasion and colony losses at each sampling time. Main results: Colonies fed with HFCS had more brood cells during the study that those fed with SS and treated colonies had fewer adult bees and Varroa infestation than untreated colonies. No significant effect of the protein supplementation was observed on any of the response variables. , SS colonies from all groups had significantly more mites drop counts than HFCS colonies. Research highlights: Considering that a reduced frequency of application is desirable, our results suggested that nutrition management could enhance chemical treatment effectiveness since honey bees might profit from improved nutrition. However, a better understanding of the nutritional requirements of the colonies under field conditions is needed.
{"title":"Impact of nutritional and sanitary management on Apis mellifera colony dynamics and pathogen loads","authors":"Agostina Giacobino, A. Pacini, A. Molineri, Natalia Bulacio-Cagnolo, J. Merke, E. Orellano, Mónica Gaggiotii, M. Signorini","doi":"10.5424/sjar/2022204-19634","DOIUrl":"https://doi.org/10.5424/sjar/2022204-19634","url":null,"abstract":"Aim of study: The aim of this study was to assess the impact of the mite control strategies combined with nutritional management on honey bee colony dynamics and survival during winter, the following spring, and summer. \u0000Area of study: Santa Fe province in central Argentina. \u0000Material and methods: We set two apiaries with 40 colonies each and fed one apiary with high fructose corn syrup (HFCS) and the other with sucrose syrup (SS). Within each apiary, we treated half the colonies against Varroa mites and half of these treated colonies also received a pollen patty. The other half of the colonies remained untreated and did not received pollen patties. All colonies were sampled for Varroa infestation level, Nosema ceranae abundance and colony strength seven times during a year (from summer 2016 to autumn 2017). We computed autumn mite invasion and colony losses at each sampling time. \u0000Main results: Colonies fed with HFCS had more brood cells during the study that those fed with SS and treated colonies had fewer adult bees and Varroa infestation than untreated colonies. No significant effect of the protein supplementation was observed on any of the response variables. , SS colonies from all groups had significantly more mites drop counts than HFCS colonies. \u0000Research highlights: Considering that a reduced frequency of application is desirable, our results suggested that nutrition management could enhance chemical treatment effectiveness since honey bees might profit from improved nutrition. However, a better understanding of the nutritional requirements of the colonies under field conditions is needed.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43718660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-11DOI: 10.5424/sjar/2022204-19549
F. Maldonado, J. A. Yuri, A. Neira, I. Razmilic
Aim of study: To evaluate whether organic and conventional management practices, cultivar and fruit growth stage affect total phenolic content, antioxidant activity and quercetin glycosides in apples of three cultivars. Area of study: The trials were conducted in commercial orchards located in Chimbarongo, O’Higgins Region, Chile. Material and methods: Two types of orchard management (organic and conventional) were studied in three apple cultivars: Gala 'Brookfield', Granny Smith and Fuji 'Raku Raku'. Total phenolic content, antioxidant activity and quercetin glycosides were evaluated according to management practices, fruit growth stage, cultivar, fruit weight and skin surface. Data were analyzed statistically using a truncated multiple regression model. Main results: No differences were found between organic and conventional management regarding polyphenol concentration and antioxidant activity, except for specific quercetin glycosides. However, significant differences were observed between cultivars in both variables, as well as in fruit development throughout the season, which showed a significant dilution of polyphenols and antioxidant activity as the fruit grew. Research highlights: Cultivar and fruit growth stage were decisive in total phenolic content, glycosidic quercetins and apples antioxidant activity. Conventional and organic management practices were significant for quercetin glycoside concentration, which is the main polyphenol in apples.
{"title":"Total phenolics, quercetin glycosides and antioxidant activity in organic and conventional orchards in three apple cultivars during fruit growth","authors":"F. Maldonado, J. A. Yuri, A. Neira, I. Razmilic","doi":"10.5424/sjar/2022204-19549","DOIUrl":"https://doi.org/10.5424/sjar/2022204-19549","url":null,"abstract":"Aim of study: To evaluate whether organic and conventional management practices, cultivar and fruit growth stage affect total phenolic content, antioxidant activity and quercetin glycosides in apples of three cultivars. \u0000Area of study: The trials were conducted in commercial orchards located in Chimbarongo, O’Higgins Region, Chile. \u0000Material and methods: Two types of orchard management (organic and conventional) were studied in three apple cultivars: Gala 'Brookfield', Granny Smith and Fuji 'Raku Raku'. Total phenolic content, antioxidant activity and quercetin glycosides were evaluated according to management practices, fruit growth stage, cultivar, fruit weight and skin surface. Data were analyzed statistically using a truncated multiple regression model. \u0000Main results: No differences were found between organic and conventional management regarding polyphenol concentration and antioxidant activity, except for specific quercetin glycosides. However, significant differences were observed between cultivars in both variables, as well as in fruit development throughout the season, which showed a significant dilution of polyphenols and antioxidant activity as the fruit grew. \u0000Research highlights: Cultivar and fruit growth stage were decisive in total phenolic content, glycosidic quercetins and apples antioxidant activity. Conventional and organic management practices were significant for quercetin glycoside concentration, which is the main polyphenol in apples.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42109367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-11DOI: 10.5424/sjar/2022204-19737
Ariadna V. Alvarado, Alan S. Alvarado, F. Arellano, F. Véliz, Á. De Santiago, V. Contreras, M. Mellado
Aim of the study: To investigate potential differences in ovarian structures relative to serum metabolite and mineral concentrations at mating. Also, body condition score (BCS), serum metabolites, and mineral profiling at mating were compared between pregnant and non-pregnant goats. Area of study: Hot zone of northern Mexico (26 °N). Material and methods: Mixed-breed goats (n= 89) on arid rangeland were exposed to bucks during the non-breeding season. Ovarian structures were recorded at mating and ten days after breeding using ultrasonography. Pregnancy was detected at 30 and 120 days post-mating. BCS, blood metabolites, and minerals were determined at mating. Main results: Pregnant goats had higher BCS at mating than non-pregnant goats. The mean serum glucose concentration was higher (p<0.05) for pregnant goats than that for non-pregnant ones (87.3 ± 12.1 vs. 74.4 ± 11.6 mg/dL). Significantly lower (p<0.01) serum urea nitrogen levels at mating were recorded in non-pregnant (10.7 ± 3.5 mg/dL) than in pregnant goats (12.4 ± 3.7 mg/dL). Lower serum glucose (72.2 ± 6.9 vs. 89.4 ± 11.2) and higher non-esterified fatty acids concentrations (NEFA; 0.43 ± 0.23 vs. 0.18 ± 0.12) were significantly associated (p<0.05) with pregnancy loss. Higher serum total protein concentrations were associated with a greater number and larger ovulatory follicles. High serum phosphorus was significantly associated with larger ovulatory follicles. Goats with ovulatory follicles ≥7.6 mm were more likely (p<0.05) to get pregnant than goats with smaller ovulatory follicles. Research highlights: Monitoring BCS, serum glucose, blood urea nitrogen, and NEFA could be used to identify goats at risk for infertility.
{"title":"Body condition score and serum metabolites and minerals concentrations as indicators of ovarian activity and pregnancy success in goats on rangeland","authors":"Ariadna V. Alvarado, Alan S. Alvarado, F. Arellano, F. Véliz, Á. De Santiago, V. Contreras, M. Mellado","doi":"10.5424/sjar/2022204-19737","DOIUrl":"https://doi.org/10.5424/sjar/2022204-19737","url":null,"abstract":"Aim of the study: To investigate potential differences in ovarian structures relative to serum metabolite and mineral concentrations at mating. Also, body condition score (BCS), serum metabolites, and mineral profiling at mating were compared between pregnant and non-pregnant goats. \u0000Area of study: Hot zone of northern Mexico (26 °N). \u0000Material and methods: Mixed-breed goats (n= 89) on arid rangeland were exposed to bucks during the non-breeding season. Ovarian structures were recorded at mating and ten days after breeding using ultrasonography. Pregnancy was detected at 30 and 120 days post-mating. BCS, blood metabolites, and minerals were determined at mating. \u0000Main results: Pregnant goats had higher BCS at mating than non-pregnant goats. The mean serum glucose concentration was higher (p<0.05) for pregnant goats than that for non-pregnant ones (87.3 ± 12.1 vs. 74.4 ± 11.6 mg/dL). Significantly lower (p<0.01) serum urea nitrogen levels at mating were recorded in non-pregnant (10.7 ± 3.5 mg/dL) than in pregnant goats (12.4 ± 3.7 mg/dL). Lower serum glucose (72.2 ± 6.9 vs. 89.4 ± 11.2) and higher non-esterified fatty acids concentrations (NEFA; 0.43 ± 0.23 vs. 0.18 ± 0.12) were significantly associated (p<0.05) with pregnancy loss. Higher serum total protein concentrations were associated with a greater number and larger ovulatory follicles. High serum phosphorus was significantly associated with larger ovulatory follicles. Goats with ovulatory follicles ≥7.6 mm were more likely (p<0.05) to get pregnant than goats with smaller ovulatory follicles. \u0000Research highlights: Monitoring BCS, serum glucose, blood urea nitrogen, and NEFA could be used to identify goats at risk for infertility.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41751319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-10DOI: 10.5424/sjar/2022204-18977
A. L. Salaro, Thiago R. A. Felipe, Cristiana Carneiro, J. Zuanon, C. M. Sabarense, A. P. S. Carneiro, W. M. Furuya, G. C. Veras, D. A. Campelo
Aim of study: To evaluate which vegetable lipid source promotes better growth performance, whole-body composition and fatty acid profile for juvenile giant trahira (Hoplias lacerdae). Area of study: Fish Nutrition Laboratory of the University of Viçosa (UFV), MG, Brazil. Material and methods: A 50-day feed trial with four treatments, consisting of diets containing different vegetable lipid sources (canola, linseed, soybean or olive oil), was conducted with juveniles of 4.76 ± 0.50 cm and 1.97 ± 0.20 g. Main results: There were no effects of vegetable lipid sources on growth performance. Fish fed diets containing canola oil had higher body lipid deposition and fish fed with linseed oil had lower body lipid content (up to -19.29%) than fish from other treatments. Fish fed canola oil showed lower proportions of saturated fatty acids (up to -11.27%) in the body. Fish fed diets containing soybean oil and linseed oil showed the highest percentages of linoleic and α-linolenic fatty acids, respectively. Fish fed diets containing soybean and linseed oils also had higher total polyunsaturated fatty acids content (up to +81.14%). Fish fed diets containing linseed oil had lower content of monounsaturated fatty acids (up to -58.59%) and higher content of docosahexaenoic (up to +175%) and eicosapentaenoic (not detectable to detectable) acids. Research highlights: Juveniles of giant thraira can alter the whole-body fatty acid profile due to their ability to desaturate and elongate the n3 and n6 series fatty acids. Linseed oil was identified as lipid source for this fish species.
{"title":"Effect of dietary vegetable lipid sources on the growth performance and whole-body fatty acid profile of giant trahira, Hoplias lacerdae","authors":"A. L. Salaro, Thiago R. A. Felipe, Cristiana Carneiro, J. Zuanon, C. M. Sabarense, A. P. S. Carneiro, W. M. Furuya, G. C. Veras, D. A. Campelo","doi":"10.5424/sjar/2022204-18977","DOIUrl":"https://doi.org/10.5424/sjar/2022204-18977","url":null,"abstract":"Aim of study: To evaluate which vegetable lipid source promotes better growth performance, whole-body composition and fatty acid profile for juvenile giant trahira (Hoplias lacerdae). \u0000Area of study: Fish Nutrition Laboratory of the University of Viçosa (UFV), MG, Brazil. \u0000Material and methods: A 50-day feed trial with four treatments, consisting of diets containing different vegetable lipid sources (canola, linseed, soybean or olive oil), was conducted with juveniles of 4.76 ± 0.50 cm and 1.97 ± 0.20 g. \u0000Main results: There were no effects of vegetable lipid sources on growth performance. Fish fed diets containing canola oil had higher body lipid deposition and fish fed with linseed oil had lower body lipid content (up to -19.29%) than fish from other treatments. Fish fed canola oil showed lower proportions of saturated fatty acids (up to -11.27%) in the body. Fish fed diets containing soybean oil and linseed oil showed the highest percentages of linoleic and α-linolenic fatty acids, respectively. Fish fed diets containing soybean and linseed oils also had higher total polyunsaturated fatty acids content (up to +81.14%). Fish fed diets containing linseed oil had lower content of monounsaturated fatty acids (up to -58.59%) and higher content of docosahexaenoic (up to +175%) and eicosapentaenoic (not detectable to detectable) acids. \u0000Research highlights: Juveniles of giant thraira can alter the whole-body fatty acid profile due to their ability to desaturate and elongate the n3 and n6 series fatty acids. Linseed oil was identified as lipid source for this fish species.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46821525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-10DOI: 10.5424/sjar/2022204-19580
Mohammad Mahmoodpour, M. Maleki, K. Mollazade
Aim of study: To develop a methodology for variable rate (VR) fertilization with less complexity in practice for variable rate fertilization. Area of study: Northwest of Iran. Materials and methods: A software was developed to read a soil map image pixel-by-pixel to provide the required information to tailor the fertilizer rate, regardless of which software was used for map generation. A total of 78 soil samples were collected and analyzed for soil potassium, and the results were used to generate an actual map including zones ranging from 70 to 190 kg/ha. The application rates were evaluated based on 50 deposition pans and compared with those calculated from the actual map. Based on the lag time in fertilization, three applied maps were also generated. Main results: The correlation coefficients found between the application rates computed based on the original soil samples and posted the locations of the sample points on the applied maps were 0.95, 0.95, and 0.94, over the ravel speeds of 6, 7, and 8 km/h, respectively. The results showed there is a correlation coefficient of 0.96 with an RMSE of 1.88 kg/ha, where the application rates computed from deposition pans compared with the corresponding location on the actual map. All applied maps were identical to the actual map. The results showed that the VR fertilization based on a direct read of a map image operated as expected. Research highlights: Fertilizer application was based on the direct read of map image. This study highlights also the need of new approaches in programing for simplicity of precision agriculture.
{"title":"A new approach for variable rate fertilization based on direct read of soil map image","authors":"Mohammad Mahmoodpour, M. Maleki, K. Mollazade","doi":"10.5424/sjar/2022204-19580","DOIUrl":"https://doi.org/10.5424/sjar/2022204-19580","url":null,"abstract":"Aim of study: To develop a methodology for variable rate (VR) fertilization with less complexity in practice for variable rate fertilization. \u0000Area of study: Northwest of Iran. \u0000Materials and methods: A software was developed to read a soil map image pixel-by-pixel to provide the required information to tailor the fertilizer rate, regardless of which software was used for map generation. A total of 78 soil samples were collected and analyzed for soil potassium, and the results were used to generate an actual map including zones ranging from 70 to 190 kg/ha. The application rates were evaluated based on 50 deposition pans and compared with those calculated from the actual map. Based on the lag time in fertilization, three applied maps were also generated. \u0000Main results: The correlation coefficients found between the application rates computed based on the original soil samples and posted the locations of the sample points on the applied maps were 0.95, 0.95, and 0.94, over the ravel speeds of 6, 7, and 8 km/h, respectively. The results showed there is a correlation coefficient of 0.96 with an RMSE of 1.88 kg/ha, where the application rates computed from deposition pans compared with the corresponding location on the actual map. All applied maps were identical to the actual map. The results showed that the VR fertilization based on a direct read of a map image operated as expected. \u0000Research highlights: Fertilizer application was based on the direct read of map image. This study highlights also the need of new approaches in programing for simplicity of precision agriculture.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42911329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-10DOI: 10.5424/sjar/2022204-19516
D. C. Blettler, J. Biurrun-Manresa, G. Fagúndez
There is considerable scientific evidence revealing a decrease in pollinating insects in different ecosystems around the world. In this context, agricultural intensification and the use of phytosanitary products are likely the main causes. This problem is common to many pollinators but of particular ecosystemic, economic and bromatological significance for honey bees (Apis mellifera) since their presence in these landscapes is mainly due to the proximity of apiaries for human food production and because they are the most important biotic pollinators of agricultural crops. In this review, we present a synthesis of the results of several years of research on this topic, as well as potential solutions referenced in the bibliography that might help alleviate the effects of contamination on honey bees and their products. Additionally, we expose the possible limits of the real implementation of such solutions and conclude on the need to implement land-use planning strategies for agricultural systems. Without mitigating actions in the short term, the sustainability of agricultural ecosystems as bee-friendly habitats and the production of foods suitable for human consumption are uncertain.
{"title":"A A review of the effects of agricultural intensification and the use of pesticides on honey bees and their products and possible palliatives","authors":"D. C. Blettler, J. Biurrun-Manresa, G. Fagúndez","doi":"10.5424/sjar/2022204-19516","DOIUrl":"https://doi.org/10.5424/sjar/2022204-19516","url":null,"abstract":"There is considerable scientific evidence revealing a decrease in pollinating insects in different ecosystems around the world. In this context, agricultural intensification and the use of phytosanitary products are likely the main causes. This problem is common to many pollinators but of particular ecosystemic, economic and bromatological significance for honey bees (Apis mellifera) since their presence in these landscapes is mainly due to the proximity of apiaries for human food production and because they are the most important biotic pollinators of agricultural crops. In this review, we present a synthesis of the results of several years of research on this topic, as well as potential solutions referenced in the bibliography that might help alleviate the effects of contamination on honey bees and their products. Additionally, we expose the possible limits of the real implementation of such solutions and conclude on the need to implement land-use planning strategies for agricultural systems. Without mitigating actions in the short term, the sustainability of agricultural ecosystems as bee-friendly habitats and the production of foods suitable for human consumption are uncertain.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43225139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-31DOI: 10.5424/sjar/2022204-18032
Jessica A. Jimenez-Rivera, A. Boglino, Joel F. Linares-Cordova, N. Duncan, M. Ruiz-Gómez, S. Rey-Planellas, Z. Ibarra-Zatarain
Aim of study: To describe the common behaviour of flathead grey mullet (Mugil cephalus) under rearing conditions. Area of study: Tepic, Mexico. Material and methods: Behaviours exhibited by mullets were videorecorded with submersible cameras installed inside of three tanks. A total of 690 min per day (07:30 - 18:30 h) were recorded per tank during a week. Afterwards, the different behaviours exhibited by juvenile M. cephalus were described, identified and characterized in an ethogram and grouped into two categories: a) locomotion, including three different observed behaviours (resting, swimming and fast swimming) and b) feeding, including three behaviours (surface feeding, bottom feeding and rubbing). Each of the behavioural variables were quantified. Main results: M. cephalus is a species with a constant locomotion associated to feeding, since fish showed continuous movement during most of day light period. On the contrary, fish exhibited reduced movement during dark periods. Mullets were observed to be a non-aggressive fish species under conditions of the present study, since the absence of dominance and aggression towards conspecifics was observed, which suggested a high predisposition for adaptation to captivity. Finally, behavioural frequencies of grey mullet juveniles were similar among the three tanks for most of the behavioural variables analysed (p>0.05) except for the variable bottom feeding (p=0.02). Research highlights: Results from this study could be of interest for the aquaculture industry to optimize rearing techniques and welfare for the production of grey mullet.
{"title":"Characterization of the different behaviours exhibited by juvenile flathead grey mullet (Mugil cephalus Linnaeus, 1758) under rearing conditions","authors":"Jessica A. Jimenez-Rivera, A. Boglino, Joel F. Linares-Cordova, N. Duncan, M. Ruiz-Gómez, S. Rey-Planellas, Z. Ibarra-Zatarain","doi":"10.5424/sjar/2022204-18032","DOIUrl":"https://doi.org/10.5424/sjar/2022204-18032","url":null,"abstract":"Aim of study: To describe the common behaviour of flathead grey mullet (Mugil cephalus) under rearing conditions. \u0000Area of study: Tepic, Mexico. \u0000Material and methods: Behaviours exhibited by mullets were videorecorded with submersible cameras installed inside of three tanks. A total of 690 min per day (07:30 - 18:30 h) were recorded per tank during a week. Afterwards, the different behaviours exhibited by juvenile M. cephalus were described, identified and characterized in an ethogram and grouped into two categories: a) locomotion, including three different observed behaviours (resting, swimming and fast swimming) and b) feeding, including three behaviours (surface feeding, bottom feeding and rubbing). Each of the behavioural variables were quantified. \u0000Main results: M. cephalus is a species with a constant locomotion associated to feeding, since fish showed continuous movement during most of day light period. On the contrary, fish exhibited reduced movement during dark periods. Mullets were observed to be a non-aggressive fish species under conditions of the present study, since the absence of dominance and aggression towards conspecifics was observed, which suggested a high predisposition for adaptation to captivity. Finally, behavioural frequencies of grey mullet juveniles were similar among the three tanks for most of the behavioural variables analysed (p>0.05) except for the variable bottom feeding (p=0.02). \u0000Research highlights: Results from this study could be of interest for the aquaculture industry to optimize rearing techniques and welfare for the production of grey mullet.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46522457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-27DOI: 10.5424/sjar/2022204-18961
I. Garrido-Jurado, E. Quesada-Moraga, M. Yousef-Yousef
Aim of study: To identify a new pest of jujube reported by the farmers in Spain. Area of study: The Iberian Peninsula (Spain). Material and methods: The insects were identified according to the mitochondrial cytochrome C oxidase subunit I (COI) gene and the main morphological features of this tephritid species, including the ocellar seta, the mesonotum and apical crossband in winds. Main results: Based on morphological characterization the insects were identified as Carpomya incompleta (Becker) (Diptera: Tephritidae), which was confirmed by the phylogenetic analysis with more than 94% of identity. Besides, the distance analysis showed very low intraspecific divergence in C. incompleta sequences. Research highlights: We report the presence of the zizyphus fruit fly in Spain for the first time. This presence has been reported to the Early Warning Systems on Alien Invasive Species of the Andalusian Government (Spain).
{"title":"Short communication: Zizyphus fruit fly (Carpomya incompleta (Becker), Diptera: Tephritidae) is expanding its range in Europe","authors":"I. Garrido-Jurado, E. Quesada-Moraga, M. Yousef-Yousef","doi":"10.5424/sjar/2022204-18961","DOIUrl":"https://doi.org/10.5424/sjar/2022204-18961","url":null,"abstract":"Aim of study: To identify a new pest of jujube reported by the farmers in Spain. \u0000Area of study: The Iberian Peninsula (Spain). \u0000Material and methods: The insects were identified according to the mitochondrial cytochrome C oxidase subunit I (COI) gene and the main morphological features of this tephritid species, including the ocellar seta, the mesonotum and apical crossband in winds. \u0000Main results: Based on morphological characterization the insects were identified as Carpomya incompleta (Becker) (Diptera: Tephritidae), which was confirmed by the phylogenetic analysis with more than 94% of identity. Besides, the distance analysis showed very low intraspecific divergence in C. incompleta sequences. \u0000Research highlights: We report the presence of the zizyphus fruit fly in Spain for the first time. This presence has been reported to the Early Warning Systems on Alien Invasive Species of the Andalusian Government (Spain).","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48418614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-20DOI: 10.5424/sjar/2022204-18658
Chuyun Tan, Shanhong Zhang, Yu Guo, Yang Wang
Aim of study: We analyzed and evaluated a nonlinear dynamic crop growth model called NICOLET B3, which can predict the dry and fresh matter content of lettuce in greenhouses. Area of study: Calibration was performed using experimental data obtained from the literature. The experiment was carried out in Saltillo, Mexico, and in a greenhouse in Beijing, China. Material and methods: We identified and discussed the feasibility of the studied model with multi-dimensional evaluation criteria. Meanwhile, a sensitivity analysis of input variables was conducted. After that, the least square identification method was used to calibrate the most sensitive parameter values to improve the robustness of the model. Main results: Results demonstrate that: i) the NICOLET B3 model is able to predict the fresh and dry matter production of lettuce with satisfactory accuracy verified (R2 = 0.9939 for fresh matter and R2 = 0.9858 for dry matter); ii) temperature has the most obvious impact on the model performance, compared with photosynthetically active radiation and CO2 concentration; iii) the model could perform well with only two inputs. Research highlights: Simulation results of evaluated NICOLET B3 model have a perfect goodness-of-fit. A method of calibrating parameters of the model and sensitivity analysis of three input variables of the model can facilitate its application.
{"title":"Analysis and evaluation of a dynamic model for greenhouse lettuce growth","authors":"Chuyun Tan, Shanhong Zhang, Yu Guo, Yang Wang","doi":"10.5424/sjar/2022204-18658","DOIUrl":"https://doi.org/10.5424/sjar/2022204-18658","url":null,"abstract":"Aim of study: We analyzed and evaluated a nonlinear dynamic crop growth model called NICOLET B3, which can predict the dry and fresh matter content of lettuce in greenhouses. \u0000Area of study: Calibration was performed using experimental data obtained from the literature. The experiment was carried out in Saltillo, Mexico, and in a greenhouse in Beijing, China. \u0000Material and methods: We identified and discussed the feasibility of the studied model with multi-dimensional evaluation criteria. Meanwhile, a sensitivity analysis of input variables was conducted. After that, the least square identification method was used to calibrate the most sensitive parameter values to improve the robustness of the model. \u0000Main results: Results demonstrate that: i) the NICOLET B3 model is able to predict the fresh and dry matter production of lettuce with satisfactory accuracy verified (R2 = 0.9939 for fresh matter and R2 = 0.9858 for dry matter); ii) temperature has the most obvious impact on the model performance, compared with photosynthetically active radiation and CO2 concentration; iii) the model could perform well with only two inputs. \u0000Research highlights: Simulation results of evaluated NICOLET B3 model have a perfect goodness-of-fit. A method of calibrating parameters of the model and sensitivity analysis of three input variables of the model can facilitate its application.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43605700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-19DOI: 10.5424/sjar/2022204-18480
Rubén Granado-Díaz, A. J. Villanueva, J. A. Gómez‐Limón
Aim of study: To test the hypothesis that consumers’ willingness to pay (WTP) for traditional food products expresses their willingness to conserve the bundle of ecosystem services (ES) provided by the territories of origin and that the intensity of these preferences is subject to spatial discounting. Area of study: We used Iberian dry-cured ham as a case study. This is a traditional and highly appreciated product characteristically produced in the Dehesa agroforestry system (southern Iberian Peninsula), an agricultural system characterized by high levels of ES provision. Material and methods: The analysis relies on a discrete choice experiment using some recently developed spatial indexes that go beyond traditional “distance-decay” effects. This method was fed with primary data gathered from a face-to-face survey administered in Andalusian food retail establishments to 1,158 respondents who had bought Iberian ham (acorn- or fodder-fed) at least once in the last year. Main results: The results provide evidence of the effects of spatial discounting on the purchase of acorn- and fodder-fed Iberian hams associated with the agroecosystem in which they are produced. These effects presumably stem from consumers’ cultural identity linked to the agroecosystem of origin and their willingness to support the local economy and communities. In addition, in the case of acorn-fed Iberian ham, spatial discounting is affected by consumers’ perception of the ES provided by the agroecosystem, with consumers who significantly perceive these services showing a higher WTP, regardless of their place of residence (no spatial discounting). Research highlights: Relevant insights can be gained from the results, especially concerning marketing strategies and the adoption of environmental and sociocultural certifications.
{"title":"Spatial discounting in food products from high natural value agroecosystems","authors":"Rubén Granado-Díaz, A. J. Villanueva, J. A. Gómez‐Limón","doi":"10.5424/sjar/2022204-18480","DOIUrl":"https://doi.org/10.5424/sjar/2022204-18480","url":null,"abstract":"Aim of study: To test the hypothesis that consumers’ willingness to pay (WTP) for traditional food products expresses their willingness to conserve the bundle of ecosystem services (ES) provided by the territories of origin and that the intensity of these preferences is subject to spatial discounting. \u0000Area of study: We used Iberian dry-cured ham as a case study. This is a traditional and highly appreciated product characteristically produced in the Dehesa agroforestry system (southern Iberian Peninsula), an agricultural system characterized by high levels of ES provision. \u0000Material and methods: The analysis relies on a discrete choice experiment using some recently developed spatial indexes that go beyond traditional “distance-decay” effects. This method was fed with primary data gathered from a face-to-face survey administered in Andalusian food retail establishments to 1,158 respondents who had bought Iberian ham (acorn- or fodder-fed) at least once in the last year. \u0000Main results: The results provide evidence of the effects of spatial discounting on the purchase of acorn- and fodder-fed Iberian hams associated with the agroecosystem in which they are produced. These effects presumably stem from consumers’ cultural identity linked to the agroecosystem of origin and their willingness to support the local economy and communities. In addition, in the case of acorn-fed Iberian ham, spatial discounting is affected by consumers’ perception of the ES provided by the agroecosystem, with consumers who significantly perceive these services showing a higher WTP, regardless of their place of residence (no spatial discounting). \u0000Research highlights: Relevant insights can be gained from the results, especially concerning marketing strategies and the adoption of environmental and sociocultural certifications.","PeriodicalId":22182,"journal":{"name":"Spanish Journal of Agricultural Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43548818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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