Volumetric analysis of brain areas indicates a shift in sensory orientation during development in the deep-sea grenadier Coryphaenoides armatus

Wagner, Hans‐Joachim

doi:10.1007/s00227-002-0990-7

Cited by 49 publications

(76 citation statements)

References 34 publications

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“…Presented with white illumination clearly within their range of detection, C. acrolepis do not appear to respond to the same degree as A. fimbria. In the adult stages of life, certain macrourid species likely rely on olfaction and mechanoreception to find food sources and possibly use vision to find mates or, to a lesser extent, food (Wagner 2002(Wagner , 2003. Bailey et al (2007) suggested that grenadiers use olfaction to locate food sources from a distance, but rely on gustation and mechanoreception at close ranges to the source.…”

Section: Discussionmentioning

confidence: 99%

“…Buoyant eggs float up to depths below 200 m and develop in the midwater until settling in the benthopelagic as juveniles. Studies suggest that, compared to the well-developed olfactory system, vision may play a minor role in the feeding strategies of certain adult macrourid species, such as C. armatus (Wagner 2002(Wagner , 2003. One proposed explanation for the large eyes of adult macrourids is to locate the perianal light organ of potential mates (Okamura 1970).…”

Section: Introductionmentioning

confidence: 99%

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Behavioral responses of two deep-sea fish species to red, far-red, and white light

Raymond¹,

Widder²

2007

Mar. Ecol. Prog. Ser.

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The relatively unobtrusive deep-sea camera system Eye-in-the-Sea (EITS) was deployed in Monterey Bay Canyon, California, USA, to assess the relative photosensitivity of 2 deepsea fishes, Coryphaenoides acrolepis and Anoplopoma fimbria. Previous studies addressing the in situ response of deep-sea fishes to red and white light were done in the presence of ROV-induced stimuli. Here, we report on the behavioral response of C. acrolepis and A. fimbria in a vehicle-free environment when subjected to white (full visible spectrum), red (685 nm), and far-red (695 nm) illumination in situ. Under far-red light conditions, A. fimbria spent significantly more time in the fieldof-view and demonstrated an increase in entrances/exits when compared to the situation under red-light and white-light conditions. No significant difference in the average time C. acrolepis spent in the field-of-view was found between any of the test wavelengths; however, the entrances-to-exits ratio for C. acrolepis decreased during white-light conditions. While A. fimbria often displayed a flight response at the onset of white and sometimes red (685 nm) illumination, C. acrolepis did not demonstrate a similar behavioral response when exposed to light within its range of visual sensitivity. A. fimbria undergo a dramatic ontogenic shift in depth, inhabiting well-lit, near-shore waters as juveniles and moving into deeper waters as adults. It is thought that C. acrolepis spend part of their early life history in the light-limited mesopelagic, below the permanent thermocline, and move into deeper waters as they mature. Based on the results of the present study, we hypothesize that systematic differences in the phototactic responses of deep-sea fishes are a function of life history as well as spectral sensitivity. KEY WORDS: Deep sea · Red light · Fish behaviorResale or republication not permitted without written consent of the publisher OPEN PEN ACCESS CCESS

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behavioral responses of two deep-sea fish species to red, far-red, and white light

Raymond¹,

Widder²

2007

Mar. Ecol. Prog. Ser.

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“…We observed young macrourids (49 to 113 mm) on 4 occasions, but they did not feed directly on bait. Previous brain morphology studies on C. armatus indicate that young individuals are visual predators and do not rely on olfactory navigation until they adopt the scavenging habit (> 450 mm TL) (Wagner 2003). Hitherto, small fish had not been seen at baited cameras, except for 1 sighting at a cetacean carcass in the PSB, 2710 m depth (Kemp et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Depth zonation and latitudinal distribution of deep-sea scavenging demersal fishes of the Mid-Atlantic Ridge, 42 to 53°N

King¹,

Bagley²,

Priede³

2006

Mar. Ecol. Prog. Ser.

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Scavenging fishes of the Mid-Atlantic Ridge (MAR) were investigated using a baited autonomous lander equipped with a time-lapse camera between 924 and 3420 m water depth along 3 east -west transects at 42, 51 and 53°N across the MAR. We photographed 22 taxa at bait. Community structure analysis revealed 3 main assemblages, shallow (924 to 1198 m), intermediate (1569 to 2355 m) and deep (2869 to 3420 m), dominated by 3 species, Synaphobranchus kaupii, Antimora rostrata and Coryphaenoides (Nematonurus) armatus, respectively. Abyssal species in the axial valley region were C. armatus, Histiobranchus bathybius and Spectrunculus sp. Compared with continental margin regions A. rostrata were abundant and grew to a large size in the 2 northern transects, whereas S. kaupii were reduced in abundance and maximum depth of occurrence. The size, abundance and depth distribution of C. armatus was consistent with the hypothesis that these fish are part of a population mixing freely across the deep North Atlantic Basin. Temperature and latitude influenced distribution. (1) Five taxa were found only in the southern transect: Pseudotriakis microdon, Centroscymnus coelolepis, Simenchelys parasitica, Anguilliformes sp. and Lepidion 1 sp.

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“…In sturgeons, the sensory area occupies a little volume of brain, because the volume of tectal ventricle was smaller in comparison to that of other species and this showed that the sturgeon requires other senses except its visual sense for living and ecological activities. The studies on different areas of sturgeon brain demonstrate changes and a tendency to use olfactory senses instead of visual senses (Wagner, 2003). Therefore, the share of midbrain from sensory area of the brain is rather small and the fish use the barbels and ampullae lurenzinielectrical receptors located on either side of the snout in sturgeons with the functions of finding bait, other ecological and living activities (Northcutt, 1978).…”

Section: Discussionmentioning

confidence: 99%

Midbrain morphogenesis in beluga sturgeon (Huso huso) larvae

Tavighi¹,

Saadatfar²,

Shojaei³

et al. 2018

BJVM

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The subject of this study was the development of midbrain in beluga sturgeon (Huso huso) larvae. To this end, 36 larvae (6 larvae of each age) were fixed in 10% buffered formalin, dehydrated in an ethanol series, cleared in xylene and embedded in paraffin. The larvae brain were very small in size, total head was fixed and sited in paraffin blocks. Serial sections (6 µm thick) were stained with haematoxylin & eosin, Luxol fast blue, cresyl echt violet and PTAH Mallory for histological studies by light microscope. A stereological study was done by the Cavalieri principle to estimate the different areas of the midbrain, about 10 sections from each specimen were selected and photographed by a camera attached to the light microscope Olympus CX22. From 1 day of age, the two parts of midbrain, optic tectum and tegmentum were obvious. There was an area between these parts called Torus semicircularis. In 6-day-old larvae, the optic tectum cell layers were partially observed and in 54-day-olds, the optic tectum occupied the largest volume of midbrain (12.16±0.07 mm 3 ). Tectal ventricle in H. huso larvae was observed from the first day. The tegmentum was located in the ventral part of the midbrain and in its dorsal part joined the hindbrain and contained some nuclei. Stereological results showed significantly distinctive regional differences in midbrain volume (P<0.05). In conclusion, according to the present research, the evolution of midbrain in H. huso was related to ecological activities and in comparison with other ray-finned fishes was not very developed.

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Volumetric analysis of brain areas indicates a shift in sensory orientation during development in the deep-sea grenadier Coryphaenoides armatus

Cited by 49 publications

References 34 publications

Behavioral responses of two deep-sea fish species to red, far-red, and white light

Behavioral responses of two deep-sea fish species to red, far-red, and white light

Depth zonation and latitudinal distribution of deep-sea scavenging demersal fishes of the Mid-Atlantic Ridge, 42 to 53°N

Midbrain morphogenesis in beluga sturgeon (Huso huso) larvae

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