Helgoland Marine Research最新文献_第2页

Ovary resorption in the Norway lobster (Nephrops norvegicus) and its possible causes with special reference to sperm storage 挪威龙虾卵巢吸收及其可能的原因，特别与精子储存有关

4区地球科学

Helgoland Marine Research Pub Date : 2020-10-27 DOI: 10.1186/s10152-020-00543-8

Carola Becker, Jaimie T. A. Dick, E. Mánus Cunningham, Mathieu Lundy, Ewen Bell, Lawrence Eagling, Julia D. Sigwart

{"title":"Ovary resorption in the Norway lobster (Nephrops norvegicus) and its possible causes with special reference to sperm storage","authors":"Carola Becker, Jaimie T. A. Dick, E. Mánus Cunningham, Mathieu Lundy, Ewen Bell, Lawrence Eagling, Julia D. Sigwart","doi":"10.1186/s10152-020-00543-8","DOIUrl":"https://doi.org/10.1186/s10152-020-00543-8","url":null,"abstract":"The Norway lobster, Nephrops norvegicus, is an important fisheries species in the North-East Atlantic area. In some circumstances, mature females of Nephrops norvegicus can resorb their ovary rather than completing spawning, but the implications of this phenomenon to reproductive biology and fisheries sustainability are not known. To understand after effects of ovary resorption, we studied long-term demographic data sets (1994–2017) collected from the western Irish Sea and the North Sea. Our considerations focused on potential correlations among the frequency of resorption, female insemination, and body size of resorbing females. Resorption was continuously rare in the western Irish Sea (less than 1%); whereas much higher rates with considerable year-to-year variation were observed in the North Sea (mean 9%). Resorption started in autumn after the spawning season (summer) had passed. The frequency stayed high throughout winter and declined again in spring. As sperm limitation can occur in male-biased fisheries, we expected a lack of insemination could be responsible for resorption, but affected females were indeed inseminated. Resorbing females were significantly larger than other sexually mature females in the North Sea, but the opposite trend was observed in the western Irish Sea. It is therefore possible that other, environmental factors or seasonal shifts, may trigger females to resorb their ovaries instead of spawning. Resorption may as well represent a natural phenomenon allowing flexibility in the periodicity of growth and reproduction. In this sense, observations of annual versus biennial reproductive cycles in different regions may be closely linked to the phenomenon of ovary resorption.","PeriodicalId":55063,"journal":{"name":"Helgoland Marine Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Culture of benthic diatom Nitzschia sp. with macroalgae carriers and its application as feed of juveniles Stichopus japonicus 大藻载体底栖硅藻Nitzschia sp.的培养及其在刺参幼鱼饲料中的应用

4区地球科学

Helgoland Marine Research Pub Date : 2020-10-16 DOI: 10.1186/s10152-020-00544-7

Aili Jiang, Heng Ji, Hengxu Liu, Huimin Zhu, Guofeng Ai, Xiaochen Guo

{"title":"Culture of benthic diatom Nitzschia sp. with macroalgae carriers and its application as feed of juveniles Stichopus japonicus","authors":"Aili Jiang, Heng Ji, Hengxu Liu, Huimin Zhu, Guofeng Ai, Xiaochen Guo","doi":"10.1186/s10152-020-00544-7","DOIUrl":"https://doi.org/10.1186/s10152-020-00544-7","url":null,"abstract":"Carrier culture is the combination of suspension culture and adherent culture. Carriers could be used to improve the culture efficiency of large-scale culture of adherent benthic diatom. In order to identify a suitable carrier for mass suspension culture of the benthic diatoms Nitzschia sp. powders of seven macroalgae were used as carriers for diatom attachment including Ulva pertusa, degummed Laminaria japonica, Sargassum muticum, Chaetomorpha valida, Zostera marina, Sargassum fusiforme and Sargassum thunbergii. Diatoms could grow on the surface of the suspended carriers and could effectively utilize the nutrients released by the decomposition of these carriers. Among the seven carriers, Ulva pertusa powder was the most effective for Nitzschia culture when comprehensively considering the nutrition of the harvested diatoms and nutrient utilization of the algae carrier by diatoms. The seaweed powder was dried at 80 °C before used as carrier, this process should meet the sterilization requirements for microalgal culture and is easy to implement in the large-scale cultivation of diatoms. Diatoms cultured with carriers were used to feed juveniles Stichopus japonicus with a wet weight of 5.0 ± 2.0 g, as well as diatoms cultured using conventional methods without carriers, and no significant differences were observed between the two kinds of feed. Compared to sea cucumbers fed with commercial feed, the growth rate of S. japonicus fed with carrier-cultured diatoms was approximately 1.5 times greater, and the activities of non-specific immune enzymes were improved in the coelomic fluid including acidic phosphatase, alkaline phosphatase and superoxide dismutase. Feeding sea cucumber with fresh diatoms could effectively reduce the total nitrogen and total phosphorus in the culture water, improve the water quality, and promote the breeding of sea cucumbers, regardless of whether the carrier culture was adopted.","PeriodicalId":55063,"journal":{"name":"Helgoland Marine Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Changes in thiamine concentrations, fatty acid composition, and some other lipid-related biochemical indices in Baltic Sea Atlantic salmon (Salmo salar) during the spawning run and pre-spawning fasting 波罗的海-大西洋鲑鱼（Salmo salar）在产卵期和产卵前禁食期间硫胺素浓度、脂肪酸组成和其他一些与脂质相关的生化指标的变化

4区地球科学

Helgoland Marine Research Pub Date : 2020-08-28 DOI: 10.1186/s10152-020-00542-9

P. J. Vuorinen, M. Rokka, T. Ritvanen, R. Käkelä, Soili Nikonen, T. Pakarinen, M. Keinänen

引用次数: 10

A cross-genus comparison of grazing pressure by two native marine herbivores on native, non-native naturalized, and non-native invasive Sargassum macroalgae 两种本地海洋食草动物对本地、非本地归化和非本地入侵马尾藻的放牧压力的跨属比较

4区地球科学

Helgoland Marine Research Pub Date : 2020-08-12 DOI: 10.1186/s10152-020-00541-w

Nikolas J. Kaplanis, Jill L. Harris, J. Smith

引用次数: 2

Giant planktic larvae of anomalan crustaceans and their unusual compound eyes 异常甲壳类动物的巨型浮游幼虫和它们不寻常的复眼

4区地球科学

Helgoland Marine Research Pub Date : 2020-08-06 DOI: 10.1186/s10152-020-00540-x

Paula Gundi, Chiara Cecchin, Lara-Leonie Fetzer, C. Haug, R. Melzer, J. Haug

引用次数: 6

Micro- and mesozooplankton at the edges of coastal tropical reefs (Tamandaré, Brazil) 沿海热带珊瑚礁边缘的微型和中型浮游动物(巴西tamandar<s:1>)

4区地球科学

Helgoland Marine Research Pub Date : 2020-05-22 DOI: 10.1186/s10152-020-00539-4

Morgana Brito-Lolaia, G. S. Santos, S. Neumann-Leitão, R. Schwamborn

引用次数: 4

Reproduction of the endangered endemic saffron coral to the Gulf of California Porites sverdrupi (Anthozoa: Scleractinia): implications for its long-term maintenance 加利福尼亚湾Porites sverdrupi（Anthozoa：硬核珊瑚属）濒危地方性藏红花珊瑚的繁殖：对其长期维护的影响

4区地球科学

Helgoland Marine Research Pub Date : 2020-05-12 DOI: 10.1186/s10152-020-00538-5

Violeta Martínez-Castillo, A. Rodríguez-Troncoso, H. Reyes‐Bonilla, C. A. Aguilar-Cruz, Carlos Rangel-Davalos

引用次数: 1

Timing of the reproductive cycle of waved whelk, Buccinum undatum, on the U.S. Mid-Atlantic Bight 美国中大西洋湾波浪螺繁殖周期的时间

4区地球科学

Helgoland Marine Research Pub Date : 2020-03-02 DOI: 10.1186/s10152-020-00537-6

S. Borsetti, D. Munroe, D. Rudders, Jui‐Han Chang

引用次数: 7

Antifouling and antibacterial activities of bioactive extracts from different organs of the sea cucumber Holothuria leucospilota 海参不同器官生物活性提取物的防污和抗菌活性

4区地球科学

Helgoland Marine Research Pub Date : 2020-02-06 DOI: 10.1186/s10152-020-0536-8

M. Darya, M. Sajjadi, M. Yousefzadi, I. Sourinejad, M. Zarei

引用次数: 17

Combined effects of ocean acidification and hypoxia on the early development of the thick shell mussel Mytilus coruscus 海洋酸化和缺氧对厚壳贻贝早期发育的联合影响

4区地球科学

Helgoland Marine Research Pub Date : 2020-01-24 DOI: 10.1186/s10152-020-0535-9

Xinghuo Wang, Yueyong Shang, Hui Kong, Menghong Hu, Jinlong Yang, Y. Deng, Youji Wang

引用次数: 7