Pleopodal fecundity of narrow-clawed crayfish (Pontastacus leptodactylus Eschscholtz, 1823)

IF 0.7 4区生物学 Q4 REPRODUCTIVE BIOLOGY

Invertebrate Reproduction & Development Pub Date : 2020-05-13 DOI:10.1080/07924259.2020.1762771

Mehmet Cìlbìz

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引用次数: 6

Abstract

ABSTRACT The pleopodal fecundity of Pontastacus leptodactylus from Hirfanlı Dam (Turkey) was investigated. Reproductive period, length at first maturity, as well as the number, weight and diameter of pleopodal eggs were determined. The study was conducted monthly at six different stations from June 2017 to May 2018. Berried females were observed between December and May. L50 length at first maturity of the female crayfish population in the lake was estimated as 9.04 cm and this value is below the applied 10 cm Minimum Landing Size (MLS). The mean egg number of the population was 240.18, the mean egg weight was 0.0122 g and the mean egg diameter was 2.702 mm. While an increase in female total length had a positive effect on mean total egg number, sampling period (progressive incubation period from December to May) caused negative effects. The mean total egg number for 1 mm total length was found to be 2.18. When the mean pleopodal egg number of the crayfish population in Hirfanlı Dam Lake was compared with populations of P. leptodactylus in other localities it was concluded that the stock is quite productive.

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窄爪小龙虾的丛足繁殖力（Pontascus leptodactylus Eschscholtz，1823）

摘要对来自土耳其HirfanlıDam的细指庞塔斯塔库斯的节肢动物繁殖力进行了研究。测定了繁殖期、初熟时的长度以及卵的数量、重量和直径。该研究于2017年6月至2018年5月在六个不同的站点每月进行一次。在12月至5月期间，观察到雌性小龙虾忧心忡忡。湖中雌性小龙虾种群首次成熟时的L50长度估计为9.04厘米，该值低于应用的10厘米最小上岸尺寸（MLS）。种群的平均蛋数为240.18枚，平均蛋重为0.0122克，平均蛋直径为2.702毫米。虽然雌性总长度的增加对平均蛋数有积极影响，但采样期（12月至5月的渐进潜伏期）造成了负面影响。全长1毫米的平均总卵数为2.18枚。当将HirfanlıDam湖小龙虾种群的平均节肢动物蛋数与其他地区的细趾小龙虾种群进行比较时，得出的结论是，该种群的生产力相当高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Invertebrate Reproduction & Development 生物-动物学

CiteScore

1.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Invertebrate Reproduction & Development ( IRD) presents original research on the reproductive and developmental biology of the Invertebrata, both embryonic and postembryonic. IRD welcomes papers reporting significant results obtained using new techniques. Encouraged topic areas include: aquaculture, physiology, biochemistry, functional morphology, phylogeny, behavioural and regulatory mechanisms, including genetic, endocrine and molecular studies. Papers containing qualitative descriptions of reproductive cycles and gametogenesis will not be considered. IRD is published in association with the International Society of Invertebrate Reproduction and Development.