Ampullary electroreceptors in the sturgeonScaphirhynchus platorynchus (rafinesque)

Teeter, John H.; Szamier, R. Bruce; Bennett, Michael V. L.

doi:10.1007/bf00657039

Cited by 64 publications

(35 citation statements)

References 29 publications

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“…Only Raja eglanteria shows PA rates as high as 45·Hz (Sisneros et al, 1998) that are similar to the 44·Hz found in the paddlefish. Spontaneous rates in sturgeons are 20-60·Hz (Teeter et al, 1980) and in catfish 50-100·Hz (Finger, 1986), values comparable to or exceeding the ones in the paddlefish. Finally, amphibian rates are 15·Hz (Münz et al, 1984;Schlegel and Roth, 1997) in the range of some elasmobranchs.…”

Section: Discussionmentioning

confidence: 91%

Response properties of electrosensory afferent fibers and secondary brain stem neurons in the paddlefish

Hofmann

Chagnaud

Wilkens

2005

Journal of Experimental Biology

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SUMMARY The passive electrosense is used by many aquatic animals to detect weak electric fields from other animals or from geoelectric sources. In contrast to the active electrosense, `passive' means that there are no electric organs,and only external fields are measured. Electroreceptors are distributed in the skin, but are different from other skin senses because they can detect and localize sources a considerable distance away. Distant sources, however,stimulate a large number of receptors at the same time and central circuits have to compute the exact location of the source from this distributed information. In order to gain insights into the algorithms involved, we compared the response properties of units in the dorsal octavolateral nucleus(DON) with primary afferent fibers in the paddlefish. The following parameters were tested: spontaneous activity, sensitivity, frequency tuning, receptive field size, movement sensitivity, and topography within the DON. Although there are some differences in spontaneous activity and receptive field size,there are no major differences between primary afferents and DON units that could reveal any substantial amount of spatial information processing. In particular the lack of any topographic order whithin the DON renders a lateral interaction between neighboring receptive fields unlikely.

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Section: Discussionmentioning

confidence: 91%

Response properties of electrosensory afferent fibers and secondary brain stem neurons in the paddlefish

Hofmann

Chagnaud

Wilkens

2005

Journal of Experimental Biology

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“…"活化石"之称 (Ma, 2007;Wang et al, 2009)。它是少数具有壶腹型电感受器的硬骨鱼类之一, 在电感受器进化中占据极为重要的地位 (Gibbs & Northcutt, 2004;Hofmann et al, 2002;Song et al, 2010)。西伯利亚鲟 (Acipenser baerii Brandt) 隶属鲟形目 (Acipenseriformes) 鲟科 (Acipenseridae) 鲟属 (Acipenser), 主要分布于俄罗斯西部的鄂毕河至东部的科雷马河之间的各河流中 (Gisbert & Williot, 2002)。西伯利亚鲟头部具较为丰富的电感受器 (Gibert et al, 1999), 且适应性广、生长速度快、具有抗病能力, 现已成为我国淡水养殖的优良品种 (Lin, 2003)。近年来, 有关西伯利亚鲟的研究已有不少, 在早期发育方面, 对其早期行为学、眼睛发育已进行了较系统的研究 (Gisbert & Ruban, 2003;Rodríguez & Gisbert, 2002), 而侧线系统发育相关研究尚未见报道。本研究从形态学和组织学角度, 应用光镜和扫描电镜研究西伯利亚鲟侧线系统早期发育, 不仅对研究电感受器的起源与进化有着重要意义, 而且为人工育苗积累基础资料。 1 材料与方法 (Baker, 2008;Dupin et al, 2007); 外胚层板是由胚胎头部特定区域的外胚层增厚单独形成的, 能发育形成各种感觉细胞及其神经节, 主要包括嗅基板、听基板、三叉基板、深基板及侧线基板等 Schlosser, 2006, (Gurgens et al, 2000;Teeter et al, 1980)。西伯利亚鲟仔鱼在 9 日龄初次摄食阶段已有壶腹器官发育成熟, 用铜加热棒可能会使西伯利亚鲟出现慌乱逃窜行为, 影响其摄食及正常生长, 并导致大批量死亡。参考文献：…”

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Development of the lateral line system in juvenile Siberian sturgeon (<I>Acipenser baerii</I>)

Song

Song²

2013

Zoological Research

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Abstract:The Siberian sturgeon (Acipenser baerii Brandt), a chondrostean, occupies an important position in the evolution of the electroreceptor. In order to more fully understanding the evolution of these receptors, we examined the development of the lateral line system during early ontogeny of the Siberian sturgeon by using light and scanning electron microscopes. We detected four major events in this process: the lateral line placodal development, the sensory ridge formation, the receptor formation and the canal formation. On day 1 of post hatching, all six lateral line placodes are present and the posterior lateral line placode starts actively migrating posteriorly along the mid-line of the trunk, depositing neuromasts at intervals on the way of migration. The other lateral line placodes elongate to form sensory ridges according to its destination line pattern over the head, all containing primordial neuromasts. By day 7, ampullary organs rise from the lateral zones of the ventral of the head, though this may lag up to one week behind of that of the neuromasts. On day 9, the epidermis under the neuromast slowly invaginates, and the bony lateral line canals begin to form. Towards day 29, the epidermal cells surrounded some single openings of the ampullary organs at the ventral surface of the head, begin to migrate, and then transform into 3 to 4 aggregate openings. By this point, abundant microvilli are visible on the surface of the receptor epithelium, similar to the structure in elasmobranches and other sturgeons. On the day 57 of post hatching, the trunk canal is fully embedded into the lateral scutes. By then, the majority of ampullary organs are highly concentrated on the ventral rostrum, arranged in clusters of 3−4, distributing closely such as the shape of quincunx, thus completing the formation of the lateral line system.

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“…In a solution with an elevated concentration of Ca 2 + the thresholds of evoked responses increased, though the level of resting activity did not change. The activity of ampullary electroreceptors of sturgeons was also blocked in the solution with 10 mM C0 2 + or Mg2+ (Teeter et al 1980). The available data on the role of divalent ions in synaptic transmission in the receptors of the acousticolateral system provide evidence that Ca 2 + is essential for transmitter release processes.…”

Section: The Effect Of Ions On Synaptic Processesmentioning

confidence: 99%

Synaptic Transmission in the Mechano- and Electroreceptors of the Acousticolateral System

Akoev

Andrianov

1989

Progress in Sensory Physiology 9

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Ampullary electroreceptors in the sturgeonScaphirhynchus platorynchus (rafinesque)

Cited by 64 publications

References 29 publications

Response properties of electrosensory afferent fibers and secondary brain stem neurons in the paddlefish

Response properties of electrosensory afferent fibers and secondary brain stem neurons in the paddlefish

Development of the lateral line system in juvenile Siberian sturgeon (<I>Acipenser baerii</I>)

Synaptic Transmission in the Mechano- and Electroreceptors of the Acousticolateral System

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