Belgian Journal of Zoology最新文献_第4页

Male mating success in the Omei treefrog (Rhacophorus omeimontis): the influence of body size and age 峨嵋树蛙（Rhacophorus omeimontis）的雄性交配成功率：体型和年龄的影响

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-15 DOI: 10.26496/bjz.2011.150

Wen Bo Liao, Xin Lu

引用次数: 0

Analysis of ontogenetic changes in head shape and diet in a catfish with moderately enlarged jaw adductors (Clariallabes melas) 分析中度肥大下颌内收肌鲶鱼（Clariallabes melas）头型和饮食的个体发育变化

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-15 DOI: 10.26496/bjz.2011.149

M. Wyckmans, A. Herrel, D. Adriaens

{"title":"Analysis of ontogenetic changes in head shape and diet in a catfish with moderately enlarged jaw adductors (Clariallabes melas)","authors":"M. Wyckmans, A. Herrel, D. Adriaens","doi":"10.26496/bjz.2011.149","DOIUrl":"https://doi.org/10.26496/bjz.2011.149","url":null,"abstract":"Jaw adductor hypertrophy, or the presence of enlarged jaw-closing muscles, has arisen several times independently in African clariid catfish. Previous work has demonstrated that species characterized by enlarged jaw adductors may have unusual ways of foraging such as terrestrial foraging and prey capture, and often include a large proportion of hard and terrestrial prey in their diet. However, relatively little is known about species of the genus Clariallabes with an intermediate degree of jaw adductor hypertrophy. In the present study we present data on head shape and diet for a range of sizes of specimens of a poorly known species of Clariallabes, C. melas. Our data show that growth patterns in this species and the previously studied \u0000C. longicauda are similar in some ways (e.g. positive allometry of the growth of the jaw muscles) but different in others (negative allometry in hyoid width). However, C. melas has a smaller head for its body size in all dimensions. Due to the large number of empty stomachs we encountered, dietary data remain preliminary, but suggest a varied diet including both hard and soft prey. Our data show that a large amount of variation in head shape may exist even among related species and that species with jaw adductor hypertrophy generally show positive allometry in the growth of the jaw adductors and associated structures. Whether jaw muscle hypertrophy is an adaptive trait in clariid catfish awaits further comparative analyses testing for the evolutionary association between jaw adductor hypertrophy and the inclusion of hard prey into the diet.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239250","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}

引用次数: 1

Facultative nesting in Rhinella spinulosa (Anura: Bufonidae): strategy to avoid dehydration of offspring 犀牛（Anura: Bufonidae）的兼性筑巢：避免后代脱水的策略

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-15 DOI: 10.26496/bjz.2011.144

E. Sanabria, L. Quiroga

引用次数: 0

Fish assemblages across a salinity gradient in the Zeeschelde estuary (Belgium) 比利时 Zeeschelde 河口盐度梯度上的鱼类群落

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-15 DOI: 10.26496/bjz.2011.148

J. Breine, J. Maes, F. Ollevier, M. Stevens

{"title":"Fish assemblages across a salinity gradient in the Zeeschelde estuary (Belgium)","authors":"J. Breine, J. Maes, F. Ollevier, M. Stevens","doi":"10.26496/bjz.2011.148","DOIUrl":"https://doi.org/10.26496/bjz.2011.148","url":null,"abstract":"Between 1991 and 2008 a total of 71 fish species was recorded in the brackish and fresh water zone of the Schelde estuary (Zeeschelde). The results were obtained from fish surveys from the cooling water filter screens of the power plant at Doel (between 1991 and 2008) and fyke net surveys along the length of the estuary between 1995 and 2008. Species abundance in the different salinity zones was analysed using the fyke net data only. The ten most abundant species represent 90.8% of the total number of individuals caught. In decreasing order of abundance: flounder (Platichthys flesus), roach (Rutilus rutilus), herring (Clupea harengus), eel (Anguilla anguilla), pike-perch (Sander lucioperca), sole (Solea solea), common goby (Pomatoschistus microps), seabass (Dicentrarchus labrax), three-spined stickleback (Gasterosteus aculeatus) and white bream (Blicca bjoerkna). With fyke nets 33 species were caught in the tidal freshwater zone, 43 species in the oligohaline zone and 59 species in the mesohaline zone. Each salinity zone is characterised by a typical fish assemblage, although some species are shared between all three salinity zones: e.g. three-spined stickleback (Gasterosteus aculeatus), Prussian carp (Carrasius gibelio), roach (Rutilus rutilus) and eel (Anguilla anguilla). Diadromous species occur in all zones and make up, on average up 22% of the species richness. Freshwater species comprise about 70% of the species in the tidal freshwater zone. In the oligohaline zone the contribution of the freshwater species to the species richness is less while marine migrants become more abundant. As expected, the contribution of marine migrants and estuarine species is higher in the mesohaline zone. The recent increase in species richness in the freshwater and oligohaline zone coincides with a remarkable increase in dissolved oxygen since 2007.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140238572","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}

引用次数: 17

One more alien freshwater fish species in New Caledonia: the three-spot gourami Trichogaster trichopterus (Teleostei: Osphronemidae) 新喀里多尼亚又多了一个外来淡水鱼种：三点胭脂鱼（Trichogaster trichopterus）（Teleostei: Osphronemidae）。

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-15 DOI: 10.26496/bjz.2011.143

C. Firmat, P. Alibert

引用次数: 2

Web-building spiders and blood-feeding flies as prey of the notch-eared bat (Myotis emarginatus) 作为缺口耳蝠猎物的织网蜘蛛和噬血蝇

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-14 DOI: 10.26496/bjz.2012.137

T. Kervyn, M. C. Godin, R. Jocqué, P. Grootaert, R. Libois

引用次数: 19

Distribution of crayfish (Decapoda, Astacoidea) in Flanders (Belgium): an update 比利时法兰德斯地区小龙虾（十足目，虾形目）的分布：最新情况

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-14 DOI: 10.26496/bjz.2012.139

P. Boets, K. Lock, T. Adriaens, A. Mouton, P. Goethals

引用次数: 11

Distribution of anticoagulant resistance in the brown rat in Belgium 比利时褐鼠抗凝血剂耐药性的分布情况

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-14 DOI: 10.26496/bjz.2012.135

K. Baert, J. Stuyck, P. Breyne, D. Maes, J. Casaer

{"title":"Distribution of anticoagulant resistance in the brown rat in Belgium","authors":"K. Baert, J. Stuyck, P. Breyne, D. Maes, J. Casaer","doi":"10.26496/bjz.2012.135","DOIUrl":"https://doi.org/10.26496/bjz.2012.135","url":null,"abstract":"Anticoagulant resistance is known as one of the major factors interfering with rodent control. Within this context we investigated the distribution of anticoagulant resistance in Flanders, northern Belgium. From 2003 to 2005, we tested 691 rats from different locations with blood clotting response tests for their susceptibility to the anticoagulant compounds warfarin, bromadiolone and difenacoum. Of these, 119 were also screened for a mutation in the VKORC1 gene that is suspected to be responsible for anticoagulant resistance. Warfarin resistant rats were found in the western and eastern parts of Flanders. The same distribution pattern was found for bromadiolone with the exception of the south-eastern area, where this form of resistance was largely absent. We detected difenacoum resistance in only six rats and did not observe any resistant rats in the central part of Flanders. Susceptible rats were found all over Flanders. Genetic analyses showed that anticoagulant \u0000resistance in Belgium was related to two different mutations in VKORC1, namely Y139F and L120Q. Our results indicate that rodent control should be regionally tailored to be most effective.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140242606","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}

引用次数: 28

Variation in reproductive parameters of Rhinella arenarum (Hensel, 1867) (Anura: Bufonidae) between the reproductive and post-reproductive periods Rhinella arenarum (Hensel, 1867) (Anura: Bufonidae)生殖期和生殖后期生殖参数的变化

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-14 DOI: 10.26496/bjz.2012.138

L. Quiroga, E. Sanabria

{"title":"Variation in reproductive parameters of Rhinella arenarum (Hensel, 1867) (Anura: Bufonidae) between the reproductive and post-reproductive periods","authors":"L. Quiroga, E. Sanabria","doi":"10.26496/bjz.2012.138","DOIUrl":"https://doi.org/10.26496/bjz.2012.138","url":null,"abstract":"We compared reproductive parameters of Rhinella arenarum in a wetland of the Monte in Argentina during reproductive and post-reproductive seasons. Individuals were collected at random, monthly from November 2001 to October 2002. August through November was considered the reproductive period, and December through April was considered the post-reproductive period. Of the 116 adults, 75 were males and 41 were females. The reproductive parameters measured included body mass, fat body mass, number of mature ova, ova size, and testicular volume. There were significant differences between the reproductive and post-reproductive periods in females for body mass, fat body mass, and number of mature ova. Likewise, males also had significant differences between these periods for body mass and fat body mass. Apparently, R. arenarum has an opportunistic and continuous reproductive strategy. Entering dormancy with large fat bodies and testes in apparent spermatogenesis allows males to reproduce immediately after emerging in the spring. However, females have mature but fewer ova during this period, which is a reproductive feature shared by most temperate amphibians. Our data, and the primarily tropical distribution of R. arenarum, suggest that this species recently invaded the temperate region wherein males retained acyclic reproductive activity and females, owing to their higher reproductive costs, have evolved cyclic reproduction.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140243071","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}

引用次数: 1

Updating the zooplankton species list for the Belgian part of the North Sea 更新北海比利时海域浮游动物物种清单

IF 1 4区生物学

Belgian Journal of Zoology Pub Date : 2024-03-14 DOI: 10.26496/bjz.2012.133

K. V. Ginderdeuren, F. Fiers, A. Backer, M. Vincx, K. Hostens

{"title":"Updating the zooplankton species list for the Belgian part of the North Sea","authors":"K. V. Ginderdeuren, F. Fiers, A. Backer, M. Vincx, K. Hostens","doi":"10.26496/bjz.2012.133","DOIUrl":"https://doi.org/10.26496/bjz.2012.133","url":null,"abstract":"Many marine species are threatened, and given the importance of biodiversity indices in the current European marine policy, taking stock of existing species and species diversity is crucial. Zooplankton form the basis of the pelagic food web, acting as staple food for fish larvae and adult pelagic fish, but are very susceptible to a changing climate. Inventorying zooplanktonic diversity is therefore important. Based on monthly sampling campaigns in 2009 and 2010, an update is provided on the zooplankton species list for the Belgian part of the North Sea. A total of 137 taxa are listed, some of which had rarely or never been observed in the area. This inventory revealed several species new to the Belgian marine species list: the calanoid copepod Metridia lucens, the cyclopoids Oithona similis and Giardella callianassae, the hydrozoans Amphinema dinema and Eutima gracilis, the mysid Acanthomysis longicornis, the polychaete worm Tomopteris helgolandica, the cladoceran Penilia avirostris and the monstrilloid copepod Cymbasoma germanicum. Additionally, we identified several males of C. germanicum, which have never been described before. Brief discussions are presented on spatial distribution and abundance of all taxa.","PeriodicalId":8750,"journal":{"name":"Belgian Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140243823","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}

引用次数: 10