Quentin Goffette, Marceline Denis, Nadja Pöllath, W. Neer
A carpometacarpus recovered during archaeological excavations in the town of Quaregnon is the westernmost find ever reported in Europe of a Ural Owl (Strix uralensis), and the first occurrence for Belgium. Both the morphology of the skeletal element and its measurements rule out an identification as any of the other Strigiformes from the Western Palearctic. The provenance of this specimen, that dates to the medieval period (10th-12th centuries AD), is discussed. It is hypothesized that the bird was a wild animal, but the available evidence does not unequivocally determine whether it belonged to a local, breeding population that went extinct or if it came from a more distant population. However, a survey of other zooarchacological finds of Ural Owl in Europe shows that the species occurred farther west in the past, outside the present natural breeding range. This suggests that Ural Owl may have found suitable nesting biotopes in Belgium and northern France during the medieval period.
{"title":"Change in Historical Range of the Ural Owl in Europe","authors":"Quentin Goffette, Marceline Denis, Nadja Pöllath, W. Neer","doi":"10.26496/BJZ.2016.37","DOIUrl":"https://doi.org/10.26496/BJZ.2016.37","url":null,"abstract":"A carpometacarpus recovered during archaeological excavations in the town of Quaregnon is the westernmost find ever reported in Europe of a Ural Owl (Strix uralensis), and the first occurrence for Belgium. Both the morphology of the skeletal element and its measurements rule out an identification as any of the other Strigiformes from the Western Palearctic. The provenance of this specimen, that dates to the medieval period (10th-12th centuries AD), is discussed. It is hypothesized that the bird was a wild animal, but the available evidence does not unequivocally determine whether it belonged to a local, breeding population that went extinct or if it came from a more distant population. However, a survey of other zooarchacological finds of Ural Owl in Europe shows that the species occurred farther west in the past, outside the present natural breeding range. This suggests that Ural Owl may have found suitable nesting biotopes in Belgium and northern France during the medieval period.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":"146 1","pages":"33-43"},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41352012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study was financed by the EU Interreg IV A project IVA-VLANED-2.31 "Invasieve exoten in Vlaanderen en Zuid-Nederland-INVEXO" and the PWO-project "EXOUT" of University College PXL.
本研究由欧盟Interreg IV A项目IVA-VLANED-2.31“荷兰荷兰Vlanderen的入侵外来物种INVEXO”和PXL大学学院的PWO项目“EXOUT”资助。
{"title":"Movements and habitat use of the invasive species Lithobates catesbeianus in the valley of the Grote Nete (Belgium)","authors":"S. Descamps, A. D. Vocht","doi":"10.26496/BJZ.2016.44","DOIUrl":"https://doi.org/10.26496/BJZ.2016.44","url":null,"abstract":"This study was financed by the EU Interreg IV A project IVA-VLANED-2.31 \"Invasieve exoten in Vlaanderen en Zuid-Nederland-INVEXO\" and the PWO-project \"EXOUT\" of University College PXL.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44668501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Nyssen, Q. Smits, Marc Van de Sijpe, Bob Vandendriessche, D. Halfmaerten, D. Dekeukeleire
1 Plecotus – Natagora, Rue Nanon 98, 5000 Namur, Belgium. 2 Département de l’Etude du Milieu Naturel et Agricole, Direction Générale de l’Agriculture, des Ressources Naturelles et de l’Environnement, Service Public de Wallonie, Avenue M. Juin 23, B-5030 Gembloux, Belgium. 3 Vleermuizenwerkgroep – Natuurpunt, Coxiestraat 11, 2800 Mechelen, Belgium. 4 Research Institute for Nature and Forest, Gaverstraat 4, 9500 Geraardsbergen, Belgium 5 Ghent University, Department Biology, Terrestrial Ecology Unit, K.L.Ledeganckstraat 35, 9000 Gent, Belgium
{"title":"First records of Myotis alcathoe von Helversen & Heller, 2001 in Belgium","authors":"P. Nyssen, Q. Smits, Marc Van de Sijpe, Bob Vandendriessche, D. Halfmaerten, D. Dekeukeleire","doi":"10.26496/BJZ.2015.53","DOIUrl":"https://doi.org/10.26496/BJZ.2015.53","url":null,"abstract":"1 Plecotus – Natagora, Rue Nanon 98, 5000 Namur, Belgium. 2 Département de l’Etude du Milieu Naturel et Agricole, Direction Générale de l’Agriculture, des Ressources Naturelles et de l’Environnement, Service Public de Wallonie, Avenue M. Juin 23, B-5030 Gembloux, Belgium. 3 Vleermuizenwerkgroep – Natuurpunt, Coxiestraat 11, 2800 Mechelen, Belgium. 4 Research Institute for Nature and Forest, Gaverstraat 4, 9500 Geraardsbergen, Belgium 5 Ghent University, Department Biology, Terrestrial Ecology Unit, K.L.Ledeganckstraat 35, 9000 Gent, Belgium","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":"145 1","pages":"130-136"},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48721138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The effects of indol-3-acetic acid (IAA) were investigated on biological parameters of Galleria mellonella (Linnaeus, 1758) (Lepidoptera: Pyralidae) and its endoparasitoid Pimpla turionellae (Linnaeus 1758) (Hymenoptera: Ichneumonidae) reared on hosts treated with 50 to 10,000 ppm of IAA in their diet. Percent fecundity of first generation of G. mellonella females increased by 12% at 50 ppm whereas the most effective decrease, by >33%, was observed at 5,000 ppm. Percent fertility decreased by >20% at 1,000 ppm. All treatments displayed ±5% variations when compared to controls except for a >20% increase in corrected percent sterility at 1,000 ppm. The results did not reveal any considerable effect of IAA on egg hatching, larval and pupal developmental, or adult emergence times. The most striking effect observed was a decline in second generation pupal developmental time by >47% at 1,000 and 10,000 ppm. No dose-wise alterations were observed in adult longevity, weight, size and female sex ratio of G. mellonella. Treatment with IAA caused a slight prolongation in adult emergence and decrease in longevity of P. turionellae reared on hosts; longevity of wasps declined by >27% at higher doses. Neither wasp size nor weight displayed significant changes upon IAA treatment.
{"title":"Effects of Indol-3-Acetic Acid on the biology of Galleria mellonella and its endoparasitoid Pimpla turionellae","authors":"F. Uçkan, R. Özbek, E. Ergin","doi":"10.26496/bjz.2015.57","DOIUrl":"https://doi.org/10.26496/bjz.2015.57","url":null,"abstract":"The effects of indol-3-acetic acid (IAA) were investigated on biological parameters of Galleria mellonella (Linnaeus, 1758) (Lepidoptera: Pyralidae) and its endoparasitoid Pimpla turionellae (Linnaeus 1758) (Hymenoptera: Ichneumonidae) reared on hosts treated with 50 to 10,000 ppm of IAA in their diet. Percent fecundity of first generation of G. mellonella females increased by 12% at 50 ppm whereas the most effective decrease, by >33%, was observed at 5,000 ppm. Percent fertility decreased by >20% at 1,000 ppm. All treatments displayed ±5% variations when compared to controls except for a >20% increase in corrected percent sterility at 1,000 ppm. The results did not reveal any considerable effect of IAA on egg hatching, larval and pupal developmental, or adult emergence times. The most striking effect observed was a decline in second generation pupal developmental time by >47% at 1,000 and 10,000 ppm. No dose-wise alterations were observed in adult longevity, weight, size and female sex ratio of G. mellonella. Treatment with IAA caused a slight prolongation in adult emergence and decrease in longevity of P. turionellae reared on hosts; longevity of wasps declined by >27% at higher doses. Neither wasp size nor weight displayed significant changes upon IAA treatment.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":"145 1","pages":"49-58"},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48790659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Descamps, Alicja Sochacka, B. Kegel, D. Loo, L. Hoorebeke, D. Adriaens
The use of high resolution, three-dimensional visualization has been receiving growing interest within life sciences, with non-invasive imaging tools becoming more readily accessible. Although initially useful for visualizing mineralized tissues, recent developments are promising for studying soft tissues as well. Especially for micro-CT scanning, several X-ray contrast enhancers are performant in sufficiently contrasting soft tissue organ systems by a different attenuation strength of X-rays. Overall visualization of soft tissue organs has proven to be possible, although the tissue-specific capacities of these enhancers remain unclear. In this study, we tested several contrast agents for their usefulness to discriminate between tissue types and organs, using three model organisms (mouse, zebrafish and Xenopus ). Specimens were stained with osmium tetroxide (OsO4), phosphomolybdic acid (PMA) and phosphotungstic acid (PTA), and were scanned using high resolution microtomography. The contrasting potentials between tissue types and organs are described based on volume renderings and virtual sections. In general, PTA and PMA appeared to allow better discrimination. Especially epithelial structures, cell-dense brain regions, liver, lung and blood could be easily distinguished. The PMA yielded the best results, allowing discrimination even at the level of cell layers. Our results show that those staining techniques combined with micro-CT imaging have good potential for use in future research in life sciences.
{"title":"Soft tissue discrimination with contrast agents using micro-CT scanning","authors":"E. Descamps, Alicja Sochacka, B. Kegel, D. Loo, L. Hoorebeke, D. Adriaens","doi":"10.26496/BJZ.2014.63","DOIUrl":"https://doi.org/10.26496/BJZ.2014.63","url":null,"abstract":"The use of high resolution, three-dimensional visualization has been receiving growing interest within life sciences, with non-invasive imaging tools becoming more readily accessible. Although initially useful for visualizing mineralized tissues, recent developments are promising for studying soft tissues as well. Especially for micro-CT scanning, several X-ray contrast enhancers are performant in sufficiently contrasting soft tissue organ systems by a different attenuation strength of X-rays. Overall visualization of soft tissue organs has proven to be possible, although the tissue-specific capacities of these enhancers remain unclear. In this study, we tested several contrast agents for their usefulness to discriminate between tissue types and organs, using three model organisms (mouse, zebrafish and Xenopus ). Specimens were stained with osmium tetroxide (OsO4), phosphomolybdic acid (PMA) and phosphotungstic acid (PTA), and were scanned using high resolution microtomography. The contrasting potentials between tissue types and organs are described based on volume renderings and virtual sections. In general, PTA and PMA appeared to allow better discrimination. Especially epithelial structures, cell-dense brain regions, liver, lung and blood could be easily distinguished. The PMA yielded the best results, allowing discrimination even at the level of cell layers. Our results show that those staining techniques combined with micro-CT imaging have good potential for use in future research in life sciences.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":"144 1","pages":"20-40"},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49606167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The by-the-wind sailor Velella velella (Linnaeus, 1758) and its predator, the violet snail Janthina globosa (Swainson, 1822) are both floating neustonic organisms. Despite their global oceanic distribution and widespread blooms of V. velella in recent years, many gaps remain in our understanding about prey/predator interactions between these two taxa. Using stable isotope ratios of carbon and nitrogen, we aimed to study the trophic relationship between V. velella and J. globosa and investigate diet variation of V. velella and J. globosa in relation to individuals’ size. Bayesian approaches were used to calculate isotopic niche metrics and the contribution of V. velella to the J. globosa diet. Our data showed that the isotopic niche of V. velella differed markedly from that of J. globosa. It was larger and did not overlap that of the J. globosa, indicating a more variable diet but at a lower trophic level than J. globosa. The isotopic niche of V. velella also varied according to the size class of the individual. Small individuals showed a larger isotopic niche than larger animals and low overlap with those of the larger individuals. J. globosa displayed very low isotopic variability and very small isotopic niches. In contrast, there were no isotopic composition nor isotopic niche differences between J. globosa of any size. This very low isotopic variability suggested that J. globosa is a specialist predator, feeding, at least in this aggregation, principally on V. velella. Moreover, outputs of a stable isotope mixing model revealed preferential feeding on medium to large (> 500 mm2) V. velella colonies. While our isotopic data showed the trophic relationship between V. velella and J. globosa, many questions remain about the ecology of these two organisms, demonstrating the need for more fundamental studies about neustonic ecosystems.
{"title":"Trophic interactions between two neustonic organisms: insights from Bayesian stable isotope data analysis tools","authors":"G. Lepoint, B. Laurent, S. Gobert, L. Michel","doi":"10.26496/BJZ.2016.47","DOIUrl":"https://doi.org/10.26496/BJZ.2016.47","url":null,"abstract":"The by-the-wind sailor Velella velella (Linnaeus, 1758) and its predator, the violet snail Janthina globosa (Swainson, 1822) are both floating neustonic organisms. Despite their global oceanic distribution and widespread blooms of V. velella in recent years, many gaps remain in our understanding about prey/predator interactions between these two taxa. Using stable isotope ratios of carbon and nitrogen, we aimed to study the trophic relationship between V. velella and J. globosa and investigate diet variation of V. velella and J. globosa in relation to individuals’ size. Bayesian approaches were used to calculate isotopic niche metrics and the contribution of V. velella to the J. globosa diet. Our data showed that the isotopic niche of V. velella differed markedly from that of J. globosa. It was larger and did not overlap that of the J. globosa, indicating a more variable diet but at a lower trophic level than J. globosa. The isotopic niche of V. velella also varied according to the size class of the individual. Small individuals showed a larger isotopic niche than larger animals and low overlap with those of the larger individuals. J. globosa displayed very low isotopic variability and very small isotopic niches. In contrast, there were no isotopic composition nor isotopic niche differences between J. globosa of any size. This very low isotopic variability suggested that J. globosa is a specialist predator, feeding, at least in this aggregation, principally on V. velella. Moreover, outputs of a stable isotope mixing model revealed preferential feeding on medium to large (> 500 mm2) V. velella colonies. While our isotopic data showed the trophic relationship between V. velella and J. globosa, many questions remain about the ecology of these two organisms, demonstrating the need for more fundamental studies about neustonic ecosystems.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49465415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Over a period of almost twenty years, clutch size and breeding success in the Montagu’s Harrier were investigated in the context of changing environmental conditions in the species’ natural breeding habitats in eastern Poland. During the study periods (1990-95 and 2003-12) a decline was noted in the number of breeding pairs in the population nesting on the calcareous peat bogs near Chełm, not far from the PolishUkrainian border. Statistically significant differences in breeding parameters between the two periods were also observed. In the first period clutch volumes were greater, as the dimensions of the individual eggs were larger; additionally, more eggs hatched and the hatchling survival rate was higher. Some habitat conditions were different in the two periods, with the water level and height of vegetation near the nests being lower in the second period. The harriers’ food in the two study periods fluctuated strongly with regard to the content of small mammals and compensatory items. In the second period a distinct increase in predator pressure was noted. Pressure from terrestrial predators diminished whereas that from aerial predators increased. Broods in semicolonies, where birds actively defended their nests, enjoyed a higher rate of survival, as did nests situated far in from the edge of peat bogs. The results suggest that the decline in breeding numbers was driven by increased predation, which was in turn a consequence of habitat changes in the natural environment of eastern Poland.
{"title":"Long-term changes of breeding success in Montagu’s Harrier Circus pygargus","authors":"J. Wiącek","doi":"10.26496/bjz.2015.51","DOIUrl":"https://doi.org/10.26496/bjz.2015.51","url":null,"abstract":"Over a period of almost twenty years, clutch size and breeding success in the Montagu’s Harrier were investigated in the context of changing environmental conditions in the species’ natural breeding habitats in eastern Poland. During the study periods (1990-95 and 2003-12) a decline was noted in the number of breeding pairs in the population nesting on the calcareous peat bogs near Chełm, not far from the PolishUkrainian border. Statistically significant differences in breeding parameters between the two periods were also observed. In the first period clutch volumes were greater, as the dimensions of the individual eggs were larger; additionally, more eggs hatched and the hatchling survival rate was higher. Some habitat conditions were different in the two periods, with the water level and height of vegetation near the nests being lower in the second period. The harriers’ food in the two study periods fluctuated strongly with regard to the content of small mammals and compensatory items. In the second period a distinct increase in predator pressure was noted. Pressure from terrestrial predators diminished whereas that from aerial predators increased. Broods in semicolonies, where birds actively defended their nests, enjoyed a higher rate of survival, as did nests situated far in from the edge of peat bogs. The results suggest that the decline in breeding numbers was driven by increased predation, which was in turn a consequence of habitat changes in the natural environment of eastern Poland.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48364971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Monitoring programs conducted by the French Research Institute for the Exploitation of the Sea IFREMER have been using the mussel watch approach introduced by Goldberg [1] since 1974, initially on wild and cultured bivalve mollusks [2], leading to long time data series for several trace elements (TEs: Ag, Cd, Cr, Cu, Hg, Ni, Pb, V and Zn; http://envlit.ifremer.fr/). Since 1996, transplanted caged Mytilus galloprovincialis Lamarck, 1819 have been used to characterize the chemical contamination of Mediterranean coastal waters even in locations where no native wild mussels were available. This project succeeded in assessing the natural background and the extent of the chemical contamination first at the scale of the French Mediterranean littoral [3,4], and more recently at the scale of the whole western Mediterranean Sea [5,6]. However, these programs have focussed on a limited number of metals. Nowadays, the development of very sensitive equipment allows the measurement of some TEs found at very low environmental levels. In parallel, recent technological developments have led to an increase in the extraction and industrial refinement of TEs previously of little concern. Therefore, the environmental monitoring of less studied, potentially toxic TEs of emerging environmental concern is relevant [7]. From data previously published by richir & Gobert [7], the first objective of this short note was to discuss the bioaccumulation profile of 19 TEs that have been either broadly (Cr, Ni, Cu, Zn, Cd, Pb, As, Ag and V) or little monitored (Be, Al, Fe, Mn, Co, Se, Mo, Sn, Sb and Bi) in the Mediterranean mussel M. galloprovincialis. The second objective was to test the relevance of the Trace Element Pollution Index of richir & Gobert [8] when modelling the effect of the shell length and flesh dry weight on the overall accumulation of these 19 TEs in ropegrown mussels. Because of the importance of gametogenesis in the physiological cycle of M. galloprovincialis, the third objective was to briefly discuss the deterministic effect of the sex and the reproductive status on the overall TE bioaccumulation and the TE-specific compartmentalization in that species.
{"title":"An ecophysiological discussion of trace element bioaccumulation in cultured Mytilus galloprovincialis","authors":"J. Richir, S. Gobert","doi":"10.26496/bjz.2016.39","DOIUrl":"https://doi.org/10.26496/bjz.2016.39","url":null,"abstract":"Monitoring programs conducted by the French Research Institute for the Exploitation of the Sea IFREMER have been using the mussel watch approach introduced by Goldberg [1] since 1974, initially on wild and cultured bivalve mollusks [2], leading to long time data series for several trace elements (TEs: Ag, Cd, Cr, Cu, Hg, Ni, Pb, V and Zn; http://envlit.ifremer.fr/). Since 1996, transplanted caged Mytilus galloprovincialis Lamarck, 1819 have been used to characterize the chemical contamination of Mediterranean coastal waters even in locations where no native wild mussels were available. This project succeeded in assessing the natural background and the extent of the chemical contamination first at the scale of the French Mediterranean littoral [3,4], and more recently at the scale of the whole western Mediterranean Sea [5,6]. However, these programs have focussed on a limited number of metals. Nowadays, the development of very sensitive equipment allows the measurement of some TEs found at very low environmental levels. In parallel, recent technological developments have led to an increase in the extraction and industrial refinement of TEs previously of little concern. Therefore, the environmental monitoring of less studied, potentially toxic TEs of emerging environmental concern is relevant [7]. From data previously published by richir & Gobert [7], the first objective of this short note was to discuss the bioaccumulation profile of 19 TEs that have been either broadly (Cr, Ni, Cu, Zn, Cd, Pb, As, Ag and V) or little monitored (Be, Al, Fe, Mn, Co, Se, Mo, Sn, Sb and Bi) in the Mediterranean mussel M. galloprovincialis. The second objective was to test the relevance of the Trace Element Pollution Index of richir & Gobert [8] when modelling the effect of the shell length and flesh dry weight on the overall accumulation of these 19 TEs in ropegrown mussels. Because of the importance of gametogenesis in the physiological cycle of M. galloprovincialis, the third objective was to briefly discuss the deterministic effect of the sex and the reproductive status on the overall TE bioaccumulation and the TE-specific compartmentalization in that species.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45625649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Erratum to Burrow morphology of three species of fiddler crab (Uca) along the coast of Pakistan","authors":"N. Qureshi, N. Saher","doi":"10.26496/bjz.2014.66","DOIUrl":"https://doi.org/10.26496/bjz.2014.66","url":null,"abstract":"This is a Erratum without an abstract.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45709578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fish assemblages in reservoirs and lakes are mainly assessed by multiple sampling gear. The challenge exists in how to combine all the data from the different types of gear to develop a fish-based index. In this paper, we describe a novel approach to this challenge in reservoirs in Flanders. The developed approach can also be used for natural lakes in the same eco-region and for any combination of fishing methods. In a first step, we defined a reference list of fish species occurring in man-made Flemish reservoirs. To compile this reference list, we adapted the reference for Dutch lakes with recent data from freshwater reservoirs in Flanders. This reference list contains guild-specific information needed to define metrics. To pre-classify the reservoirs, a habitat status for each reservoir was set using abiotic parameters (pressures). Fish gear-dependent metrics were selected according to their response to these pressures. Threshold values for metrics were determined based on the species reference list and occasionally on the calculated metric values. The ecological quality ratios derived from the index calculation were validated with an independent set of data. The developed index proved to successfully assess the ecological status of the reservoirs in Flanders.
{"title":"Development of a fish-based index combining data from different types of fishing gear. A case study of reservoirs in Flanders (Belgium)","authors":"J. Breine, Gerlinde Van Thuyne, L. Bruyn","doi":"10.26496/BJZ.2015.55","DOIUrl":"https://doi.org/10.26496/BJZ.2015.55","url":null,"abstract":"Fish assemblages in reservoirs and lakes are mainly assessed by multiple sampling gear. The challenge exists in how to combine all the data from the different types of gear to develop a fish-based index. In this paper, we describe a novel approach to this challenge in reservoirs in Flanders. The developed approach can also be used for natural lakes in the same eco-region and for any combination of fishing methods. In a first step, we defined a reference list of fish species occurring in man-made Flemish reservoirs. To compile this reference list, we adapted the reference for Dutch lakes with recent data from freshwater reservoirs in Flanders. This reference list contains guild-specific information needed to define metrics. To pre-classify the reservoirs, a habitat status for each reservoir was set using abiotic parameters (pressures). Fish gear-dependent metrics were selected according to their response to these pressures. Threshold values for metrics were determined based on the species reference list and occasionally on the calculated metric values. The ecological quality ratios derived from the index calculation were validated with an independent set of data. The developed index proved to successfully assess the ecological status of the reservoirs in Flanders.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":"145 1","pages":"17-39"},"PeriodicalIF":1.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48101565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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