Growth and Reproduction of Planorbarius corneus (Linnaeus, 1758) in Laboratory Conditions

Q3 Environmental Science

Ribarstvo, Croatian Journal of Fisheries Pub Date : 2021-08-30 DOI:10.2478/cjf-2021-0012

Neda Mažuran, G. Kovačević

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Abstract

Abstract This study presents the results of observation on growth and reproduction of Planorbarius corneus (Linnaeus, 1758) (Gastropoda, Pulmonata) over the course of several years of continuous rearing in the laboratory in order to use them as test organisms for toxicity testing of chemicals. Some growth and reproduction features (shell diameter increase, fecundity, hatching time and rate, age at first reproduction, juvenile survival), which could provide more information for culturing P. corneus in the laboratory, are presented. The quantitative results of growth and reproduction in laboratory conditions were obtained: heterogenous growth varied between 0.1 mm and 5.3 mm in individual snails, production of 0.6 egg masses per snail/day and 11 eggs per snail/day. A statistically significant negative correlation between initial snail size and growth was noticed. In the second part of the experiment, the reproductive output of 4 isolated snails was compared to that of permanently grouped snails. As a result, 2-fold decreased growth and 4-fold decreased reproductive output in the progeny of isolated animals was noticed.

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林奈，1758年在实验室条件下的生长和繁殖

摘要:本文介绍了在实验室连续饲养数年，对角拟蟹(Linnaeus, 1758)(腹足目，肺足目)生长和繁殖的观察结果，以期将其作为化学物质毒性试验的试验生物。介绍了一些生长和繁殖特征(壳径增大、繁殖力、孵化时间和孵化率、初次繁殖年龄、幼鱼存活率)，可为实验室培养提供更多信息。在实验室条件下获得了生长和繁殖的定量结果:单个螺的异质生长在0.1 ~ 5.3 mm之间，每只螺每天产卵0.6个，每只螺每天产卵11个。蜗牛初始大小与生长呈显著负相关。在实验的第二部分，将4只分离螺的繁殖产量与永久分组螺的繁殖产量进行比较。结果发现，分离动物后代的生长速度下降了2倍，生殖产量下降了4倍。

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来源期刊

Ribarstvo, Croatian Journal of Fisheries Environmental Science-Ecology

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： The Croatian Journal of Fisheries was established in 1938 and today possesses a long-term tradition of publishing papers that deal with both freshwater and marine fisheries. Areas covered by the Journal include ichthyology, aquaculture, ecology and diseases of fish and other aquatic organisms, problems of open waters and other topics related to the fisheries field. Prior to publication, articles pass through rigorous review by senior scientists from around the world. The Journal features articles that reflect original research, interpretative content and subject matter of interest to the fisheries profession.