Fine Structure of the Respiratory Surfaces of an Air-breathing Fish, the Climbing Perch Anabas testudineus (Bloch)

Hughes, G. M.; Munshi, J. S. Datta

doi:10.1038/2191382a0

Cited by 39 publications

(26 citation statements)

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“…The exponential factor for 02 uptake in relation to body The significant portion of the results is that specimens of Anabas smaller than 11 mg body weight and 1 .78 cm body length could theoretically obtain their entire 02 demand through water, since this size represents the inter-1 3 1 Hughes & Singh (1970) besides on their body size, much on the conditions of the ambient water .…”

Section: Discussionmentioning

confidence: 99%

“…129-133, 19791931Gray, 1954 ;Muir & Hughes, 1969 ;Hughes et al, 1973, '74a, b) . At the same time, 02 consumption measurement on adult specimens of Anabas (Hughes, & Singh, 1970;, Heteropneustes (Singh & Hughes, 1971 ;Munshi et al, 1978) and Clarias (Munshi et al, 1976) has been made . However, there does not exist any literature on the measurement of 02 uptake during development and growth of a fish .…”

Section: Introductionmentioning

confidence: 99%

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Oxygen uptake through water during early life of Anabas testudineus (Bloch)

Mishra

Singh

1979

Hydrobiologia

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The 02 consumption (mg/hr) through water in case of Anabas testudineus during development and growth has been measured and its relationship to body weight or length studied .The logarithmic plot of 0 2 uptake through water either against body weight or length suggested a statistically significant (P > 3 .53) two-component curve, the point of intersection being at 1 I mg body weight and 1 .78 cm body length . These are the theoretical values of weight or length at which the responsibility of supplementing nearly 40% of the total 0 2 demand through the newly developed air breathing organ falls in the early life of the fish. One of the impelling causes forcing developing fry of Anabas to adopt a bimodal gas exchange machinery seems to be 4 fold increase in the diffusion distance at the gills .

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxygen uptake through water during early life of Anabas testudineus (Bloch)

Mishra

Singh

1979

Hydrobiologia

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“…For Romer's purposes, what is really needed is a developed network of ponds, and this is what the dynamics of modulated tides provides. A striking contemporary example of pond-searching is evinced by the so-called 'climbing perches', Anabas testudineus [22], air breathing fish who literally save themselves by terrestrial locomotion from one drying puddle to a deeper pool. These fish, whose behaviour constitutes a sort of Romerian ideal, inhabit wetlands in southeast Asia, hardly an arid climate.…”

Section: Resultsmentioning

confidence: 99%

Dynamical, biological and anthropic consequences of equal lunar and solar angular radii

Balbus

2014

Proc. R. Soc. A.

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The nearly equal lunar and solar angular sizes as subtended at the Earth is generally regarded as a coincidence. This is, however, an incidental consequence of the tidal forces from these bodies being comparable. Comparable magnitudes implies strong temporal modulation, as the forcing frequencies are nearly but not precisely equal. We suggest that on the basis of palaeogeographic reconstructions, in the Devonian period, when the first tetrapods appeared on land, a large tidal range would accompany these modulated tides. This would have been conducive to the formation of a network of isolated tidal pools, lending support to A. S. Romer's classic idea that the evaporation of shallow pools was an evolutionary impetus for the development of chiridian limbs in aquatic tetrapodomorphs. Romer saw this as the reason for the existence of limbs, but strong selection pressure for terrestrial navigation would have been present even if the limbs were aquatic in origin. Since even a modest difference in the Moon's angular size relative to the Sun's would lead to a qualitatively different tidal modulation, the fact that we live on a planet with a Sun and Moon of close apparent size is not entirely coincidental: it may have an anthropic basis.

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“…Investigations of the participation of mucous in active transport may well demonstrate an important role of mucous in the ionic regulation of teleosts in fresh water (13). In marine teleosts, gills are designed for ion, water, and gas exchange between blood and water (4,7,9,17) . Mucous goblet cells are particularly abundant in the gill primary lamellae.…”

Section: Discussionmentioning

confidence: 99%