大眼褶鱼(Ancistrus cirrhosus)适应性空气呼吸的发展

IF 1.4 4区 环境科学与生态学 Q3 ECOLOGY
Lauren W. Crowder, Edward M. Dzialowski
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引用次数: 0

摘要

大口鲶(Ancistrus cirrhosus)是鳞鲇科鳞鲇属的一个物种,当面临缺氧的水生环境时,它会利用其高度血管化的胃呼吸空气。本研究的主要目标是确定虹鳟从幼鱼到成鱼呼吸空气和呼吸空气行为的发育起始阶段。发育中的幼体在孵化后 4 到 6 个月内达到功能成熟,长到成体长 8 到 10 厘米。为了研究呼吸空气的发育起始时间,我们测试了从体长 1 厘米的幼鱼到体长 8 厘米的成鱼的呼吸空气行为,方法是在 50 分钟内将每条鱼置于水生氧气含量从 100% 空气饱和度逐渐降低到 8% 空气饱和度的急性环境中。体长在 2.1 至 3 厘米之间、体重在 1.1 至 2 克之间的幼鱼首次开始呼吸空气。在呼吸空气的鱼类中,鱼体长度与开始呼吸空气时的空气饱和度呈弱负相关。还将鱼暴露于 15%空气饱和度的急性阵痛中 60 分钟,观察其呼吸行为。鱼类暴露于 15%的急性空气饱和状态 60 分钟后,其呼吸频率与鱼体长度呈负相关。发育中的虹鳟鱼体长达到 3 厘米、体重达到 2 克时,就能在水生缺氧环境中利用空中环境。而在达到这一尺寸之前,这些动物如果没有呼吸空气的能力,就可能会因严重的水生缺氧而死亡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Development of facultative air breathing in bristlenose plecos (Ancistrus cirrhosus)

Development of facultative air breathing in bristlenose plecos (Ancistrus cirrhosus)

The bristlenose pleco (Ancistrus cirrhosus) is a species of Loricariidae armored catfish that breathes air using its highly vascularized stomach when faced with hypoxic aquatic environments. The main goals of this study were to determine the developmental onset of air breathing and air-breathing behavior in A. cirrhosus from juveniles to adults. Developing juveniles reach functional maturity within 4 to 6 months of hatching, growing to an adult length of 8 to 10 cm. To examine the timing of the developmental onset of air breathing, we tested for air-breathing behavior in juveniles beginning at 1 cm in length up through adults at 8 cm in length by exposing each fish to an acute gradual decrease in aquatic oxygen content from 100% air saturation down to 8% air saturation over a 50-min period. Juvenile fish first began to breathe air at body lengths between 2.1 and 3 cm and masses of 1.1 and 2 g. Fish with body lengths above 3 cm all breathed air when hypoxia challenged. In fish that breathed air, there was a weak negative correlation between fish length and % air saturation at which air breathing began. Fish were also exposed to an acute bout of 15% air saturation for 60 min, and breathing behavior was observed. Fish exposed to 60 min acute 15% air saturation exhibited a negative correlation between the frequency of air breathing and fish length. The developing A. cirrhosus can take advantage of the aerial environment once they reach 3 cm in length and 2 g when exposed to aquatic hypoxia. Prior to this size, these animals would potentially succumb to severe aquatic hypoxia without the ability to breathe air.

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来源期刊
Environmental Biology of Fishes
Environmental Biology of Fishes 环境科学-海洋与淡水生物学
CiteScore
2.60
自引率
14.30%
发文量
169
审稿时长
3 months
期刊介绍: Environmental Biology of Fishes is an international journal that publishes original studies on the ecology, life history, epigenetics, behavior, physiology, morphology, systematics and evolution of marine and freshwater fishes. Empirical and theoretical papers are published that deal with the relationship between fishes and their external and internal environment, whether natural or unnatural. The journal concentrates on papers that advance the scholarly understanding of life and draw on a variety of disciplines in reaching this understanding. Environmental Biology of Fishes publishes original papers, review papers, brief communications, editorials, book reviews and special issues. Descriptions and submission requirements of these article types can be found in the Instructions for Authors.
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