Narial Breathing in Fishes and the Evolution of Internal Nares

Atz, James W.

doi:10.1086/399105

Cited by 34 publications

(13 citation statements)

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“…Several authors have commented on the air breathing pattern of Neoceratodus (Semon, 1899;Dean, 1906;Atz, 1952;Grigg, 1965a). Inspiration is compared to the positive pressure buccal compression and swallowing described for amphibia.…”

Section: Mechanics Of Air Breathingmentioning

confidence: 99%

Respiratory control in the lungfish, Neoceratodus forsteri (krefft)

Johansen

Lenfant

Grigg

1967

Comparative Biochemistry and Physiology

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Abstract-1. Respiratory control has been studied in the lungfish, Neoceratodus forsteri by measuring ventilation (V e ), oxygen uptake (VO 2 ), per cent O 2 extraction from water, breathing rates of branchial and aerial respiration and changes in blood gas and pulmonary gas composition during exposure to hypoxia and hypercarbia.2. Hypoxic water represents a strong stimulus for compensatory increase in both branchial and aerial respiration. Water ventilation increases by a factor of 3 or 4 primarily as a result of increased depth of breathing.3. The ventilation perfusion ratio decreased during hypoxia because of a marked increase in cardiac output. Hypoxia also increased the fraction of total blood flow perfusing the lung. Injection of nitrogen into the lung evoked no compensatory changes.4. It is concluded that the chemoreceptors eliciting the compensatory changes are located on the external side facing the ambient water or in the efferent branchial blood vessels.5. Elevated pCO 2 in the ambient water depressed the branchial respiration but stimulated aerial respiration.6. It is suggested that the primary regulatory effect of the response to increased ambient pCO 2 is to prevent CO 2 from entering the animal, while the secondary stimulation of air breathing is caused by hypoxic stimulation of chemoreceptors located in the efferent branchial vessels.

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Section: Mechanics Of Air Breathingmentioning

confidence: 99%

Respiratory control in the lungfish, Neoceratodus forsteri (krefft)

Johansen

Lenfant

Grigg

1967

Comparative Biochemistry and Physiology

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“…It m ay be noted, however, th a t in Ophicephalus ( = Channa) marulius, B urne [1909] has described only one acces sory s a c -th e dorsoinesial one. Accessory sacs act as a pum ping de vice responsible for effecting replacem ent of w ater in the olfactory cavity and their movements are synchronized w ith the respiratory m ovem ents of the fish or are controlled by the m ovements of the jaws [Ow en , 1866;Solger, 1893;Kyle, 1899;B urne, 1909;van den B erghe, 1929;Liermann, 1933;Matthes, 1934;Atz, 1952;E aton, 1956: J ohnson andBrown, 1962;Gooding, 1963].…”

Section: Discussionmentioning

confidence: 99%

“…Accessory sacs have been known to function as a pumping device for circulating water through the olfactory chamber and have been described in several fishes [Owen, 1886; Kyle, 1899: Burne. 1909;Liermann, 1933; Atz, 1952: J ohnson and Brown, 1962; Gooding, 1963: Kleerekoper. 1969).…”

Section: Introductionmentioning

confidence: 99%

Functional anatomy of the nose and accessory nasal sacs in the teleost Channa punctatus Bloch

Kapoor¹,

Ojha²

1973

Cells Tissues Organs

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“…One possibility is the migration of the external, excurrent nostril into the mouth cavity. There are examples of such a development in some teleosts (Echelidae and Ophichthyidae, Atz, 1952) and in elasmobranchs (Wahlert, 1966). Nowadays it is agreed that such was the origin of the internal nares of Dipnoi.…”

Section: The Origin Of Terrestrial Adaptations In Land Vertebratesmentioning

confidence: 99%

“…We know that such a process occurred at least twice, and probably three times among teleosts. Internal nares are present in Astroscopus (Atz, 1952), in Ichthyoscopus (Mees, 1962), and in Gymnodraco acuticeps (Jakubowski, 1975). Astroscopus and Ichthyoscopus belong to the same family, Uranoscopidae, therefore they could have inherited the internal nares from a common ancestor, although in other investigated genera of Uranoscopidae choanae are absent.…”

Section: The Origin Of Terrestrial Adaptations In Land Vertebratesmentioning

confidence: 99%