Reproduction dynamics of the marbled crayfish Procambarus virginalis Lyko, 2017 from an anthropogenic lake in northern Croatia

IF 2.2 3区 环境科学与生态学 Q2 ECOLOGY Aquatic Invasions Pub Date : 2021-01-01 DOI:10.3391/ai.2021.16.3.06
A. Dobrović, I. Maguire, M. Boban, Dorotea Grbin, Sandra Hudina
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引用次数: 8

Abstract

Despite the growing number of established populations in Europe, the reproduction dynamics of parthenogenetic marbled crayfish, Procambarus virginalis Lyko, 2017, from populations in the wild is currently understudied. In this study, we performed a systematic seven-month long monitoring of the reproduction dynamics of marbled crayfish population in an anthropogenic lake in continental Croatia. Crayfish were caught monthly by applying the baited stick catch method. We recorded pleopodal fecundity and the number of hatched juveniles in each monthly catch and a random selection of individuals (20 per month) was dissected to determine the ovarian fecundity. Obtained fecundity parameters were correlated with crayfish size (total length, weight and pleon size), body condition (Fulton’s condition factor), organosomatic indices (hepatosomatic index: HSI and gonadosomatic index: GSI) and compared with available literature data on marbled crayfish from laboratory-reared or wild populations. Based on the obtained data, we identified two potential reproductive peaks in early summer and mid autumn. However, the continuous presence of individuals with mature ovarian eggs and glair glands throughout almost the entire monitoring period indicates potential reproduction throughout June to November. Ovarian egg number and number of hatched juveniles was significantly correlated with crayfish size and Fulton’s condition factor, while GSI exhibited significant variations among analyzed months and was positively correlated with HSI. The number of hatched juveniles in our study was significantly lower compared to literature data for marbled crayfish from populations in the wild and laboratory-reared populations. Collected data offer insights into the understudied reproduction dynamics of marbled crayfish in the wild and represent baseline information for predicting its invasion dynamics and risks of its further spread in this region.
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克罗地亚北部一个人为湖泊中大理石纹小龙虾原螯虾Lyko的繁殖动态
尽管欧洲已建立的种群数量不断增加,但目前对孤雌生殖大理石纹小龙虾原螯虾(Procambarus virginalis Lyko, 2017)野生种群的繁殖动态研究尚不充分。在这项研究中,我们对克罗地亚大陆一个人为湖泊中大理石纹小龙虾种群的繁殖动态进行了长达7个月的系统监测。采用带饵棒捕法每月捕获小龙虾。我们记录了每个月捕获的多卵繁殖力和孵化幼鱼的数量,并随机选择个体(每月20只)进行解剖以确定卵巢繁殖力。将所得的繁殖力参数与小龙虾的体型(全长、体重和鱼鳞)、身体状况(富尔顿条件因子)、器官体指数(肝体指数:HSI和性腺体指数:GSI)相关,并与实验室饲养和野生大理石纹小龙虾的现有文献数据进行比较。根据获得的数据,我们确定了夏初和中秋两个潜在的繁殖高峰。然而,在几乎整个监测期间,不断有成熟卵巢卵和腺的个体出现,这表明在6月至11月期间可能会繁殖。卵巢卵数和孵化幼虾数与小龙虾大小和富尔顿条件因子显著相关,而GSI在分析月份间变化显著,与HSI呈正相关。与文献数据相比,我们研究的大理石纹小龙虾的孵化幼崽数量明显低于野生种群和实验室饲养种群。收集到的数据提供了对野生大理石纹螯虾繁殖动态的深入研究,并为预测其入侵动态及其在该地区进一步传播的风险提供了基线信息。
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来源期刊
Aquatic Invasions
Aquatic Invasions ECOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
4.30
自引率
0.00%
发文量
20
审稿时长
6-12 weeks
期刊介绍: Aquatic Invasions is an open access, peer-reviewed international journal focusing on academic research of biological invasions in both inland and coastal water ecosystems from around the world. It was established in 2006 as initiative of the International Society of Limnology (SIL) Working Group on Aquatic Invasive Species (WGAIS) with start-up funding from the European Commission Sixth Framework Programme for Research and Technological Development Integrated Project ALARM. Aquatic Invasions is an official journal of International Association for Open Knowledge on Invasive Alien Species (INVASIVESNET). Aquatic Invasions provides a forum for professionals involved in research of aquatic non-native species, including a focus on the following: • Patterns of non-native species dispersal, including range extensions with global change • Trends in new introductions and establishment of non-native species • Population dynamics of non-native species • Ecological and evolutionary impacts of non-native species • Behaviour of invasive and associated native species in invaded areas • Prediction of new invasions • Advances in non-native species identification and taxonomy
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