Malacologia最新文献_第5页

The Family Mactridae Lamarck, 1809 (Bivalvia: Cardiida) in South African Waters 拉马克家，1809年(比瓦亚目:卡迪亚目)在南非水域

IF 1.3 4区生物学

Malacologia Pub Date : 2021-03-01 DOI: 10.4002/040.063.0204

J. Signorelli

引用次数: 1

Introduction of the Predatory Land Snail Species Poiretia delesserti (Spiraxidae) in France 法国捕食性陆地蜗牛Poiretia delesserti的引种

IF 1.3 4区生物学

Malacologia Pub Date : 2021-03-01 DOI: 10.4002/040.063.0209

B. Hausdorf, Stephan Solvery

引用次数: 2

Ingestion of Poisonous Eggs of the Invasive Apple Snail Pomacea canaliculata Adversely Affects Bullfrog Lithobathes catesbeianus Intestine Morphophysiology 牛蛙误食入侵Apple Snail Pomacea canaliculata有毒卵对其肠道形态生理的影响

IF 1.3 4区生物学

Malacologia Pub Date : 2021-03-01 DOI: 10.4002/040.063.0202

T. R. Brola, M. Dreon, P. Fernández, E. Portiansky, H. Heras

{"title":"Ingestion of Poisonous Eggs of the Invasive Apple Snail Pomacea canaliculata Adversely Affects Bullfrog Lithobathes catesbeianus Intestine Morphophysiology","authors":"T. R. Brola, M. Dreon, P. Fernández, E. Portiansky, H. Heras","doi":"10.4002/040.063.0202","DOIUrl":"https://doi.org/10.4002/040.063.0202","url":null,"abstract":"ABSTRACT The poisonous eggs of Pomacea canaliculata hardly have any predators. This invasive snail, listed among 100 of the worst invasive species, is a serious crop pest and a vector of human parasitic diseases. Females lay eggs in pink-reddish masses, the colour presumably a warning of their chemical defenses. Egg ingestion alters rodent gastrointestinal tracts and is lethal if injected, but its effect on other taxa is unknown. Here we explored the toxic effects of Pomacea canaliculata eggs on the bullfrog Lithobathes catesbeianus (Anura, Ranidae). Juvenile bullfrogs were gavaged with egg extracts and their digestive tract analyzed after 24 h and 48 h using histological, immunohistochemical and lectin-histochemical techniques. Toxicity was also evaluated by intraperitoneal injection of egg extract. Egg extract ingestion adversely affected the small intestine of the bullfrogs. Short term (24 h) effects included large, reversible changes of the intestinal wall, villi morphology, and changes in the glycosylation patterns of enterocytes. The mucosal area increased and infiltration of inflammatory cells, mainly eosinophils and macrophages, were observed together with a weak hemorrhage. Most of these changes reversed after 48 h. In addition, intraperitoneal injection of egg extract was nontoxic to bullfrog juveniles and no lethality or behavioral changes were observed, a remarkable difference from the effect on rodents. Overall, these results indicate that toxins of apple snail eggs reversibly modify gut morphology, which may alter bullfrog physiology, limiting their ability to absorb egg nutrients. This study extends the known targets of the apple snail egg defenses against predation to amphibians.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"63 1","pages":"171 - 182"},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46328364","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: 2

Paropeas achatinaceum (Pfeiffer, 1846) and Other Alien Subulinine and Opeatine Land Snails in European Greenhouses (Gastropoda, Achatinidae) 欧洲温室中的Paroppeas achatinaceum（Pfeiffer，1846）和其他外来的Subulinine和Opeatine陆蜗牛（腹足目，Achatnidae）

IF 1.3 4区生物学

Malacologia Pub Date : 2020-09-10 DOI: 10.4002/040.063.0112

M. Horsák, F. Naggs, T. Backeljau

引用次数: 5

Maturity Assessment for the Implementation of the First Fishery Regulation in Patagonian Marine Gastropods 巴塔哥尼亚海洋腹足类动物实施第一项渔业法规的成熟度评估

IF 1.3 4区生物学

Malacologia Pub Date : 2020-09-10 DOI: 10.4002/040.063.0114

M. Cumplido, G. Bigatti

{"title":"Maturity Assessment for the Implementation of the First Fishery Regulation in Patagonian Marine Gastropods","authors":"M. Cumplido, G. Bigatti","doi":"10.4002/040.063.0114","DOIUrl":"https://doi.org/10.4002/040.063.0114","url":null,"abstract":"ABSTRACT In order to establish management measures for a new resource, the size at first maturity should be studied. This measurement is a powerful tool in enabling the sustainable exploitation of marine benthic resources. Patagonian marine gastropods are captured as complementary catches during scallop fisheries. Studies related to the size at first maturity were performed for edible marine gastropods in northern Patagonia and have been used for the creation of the first regulation of gastropod catches made by the Secretary of Fisheries of Chubut Province. The minimum capture size of some of the species included in this regulation was established from preliminary studies but needed histological confirmation. The present study aims to provide accurate information on the size at maturity by an assessment that includes first gonadal maturity and population size/weight data of Buccinanops deformis and Trophon geversianus, two edible species of marine gastropods with high abundance along the Patagonian Atlantic coast and elevated nutritional values in their edible tissues. By histological methods, females of B. deformis reach maturity at 2.8 cm and males at 1.95 cm. While by an alternative histological method (inflexion point method), females reach maturity at 2.76 cm and males at 2.1 cm. For T. geversianus, females reach maturity at 3 cm (inflexion point = 2.38 cm) and males at 1.65 cm (inflexion point = 2.01 cm). The maturity assessment of B. deformis and T. geversianus revealed that males reach maturity at a smaller size than females, probably due to the fact that females require a more gradual process in maturation with a greater reproductive investment. The size at first sexual maturity provides valuable information for establishing the minimum catchable size. Therefore, we estimate a minimum size limit for B. deformis of 3.6 cm and 3.5 cm for T. geversianus and suggest that fishery measurements for these species should be established by performing a particular maturity assessment in each fishery zone.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"63 1","pages":"139 - 147"},"PeriodicalIF":1.3,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43577566","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: 6

Back Matter Back Matter

IF 1.3 4区生物学

Malacologia Pub Date : 2020-09-10 DOI: 10.4002/040.063.0115

引用次数: 19

Proteomic Fingerprinting Discriminates Cryptic Gastropod Species 蛋白质组学指纹鉴别隐腹足动物

IF 1.3 4区生物学

Malacologia Pub Date : 2020-09-10 DOI: 10.4002/040.063.0113

T. Wilke, J. Renz, T. Hauffe, Diana Delicado, J. Peters

引用次数: 5

The North Atlantic Conoidean Gastropod Theta lyronuclea (Raphitomidae) in Deep-Waters of the Southwestern Atlantic 西南大西洋深水中的北大西洋锥足目腹足目lyronuclea (rapitomidae)

IF 1.3 4区生物学