Heat production induced by photoperiodicity in the pigeon

A. Haim; S. Saarela; R. Hissa

doi:10.1016/0300-9629(79)90193-2

Heat production induced by photoperiodicity in the pigeon

A. Haim
, S. Saarela
, R. Hissa

Research output: Contribution to journal › Article › peer-review

Abstract

1. 1. The effect of photoperiodicity on heat production was studied in pigeons (Columba livia) acclimated to 12L:12D, 24D, 4L:20D and 24L at T_a = 22°C, to 4L:20D at T_a = 32°C and to 24L at T_a = 2°C. 2. 2. Pigeons acclimated to 4L:20D at T_a = 22°C increased oxygen consumption significantly (P < 0.05) at T_a= 26°C and T_a = 6°C, compared to the control group (12L:12D at T_a = 22°C). Body weight in these birds decreased significantly (P < 0.01 ) due to acclimation. 3. 3. Oxygen consumption was high but not significantly increased in pigeons acclimated to cycles of 4L:20D at T_a = 32°C and 24L at _a = 2°C. 4. 4. Pigeons acclimated to 24D were significantly hypothermie (P < 0.01) due to acclimation (at T_a = 22°C), while no change in body weight was observed. 5. 5. Photoperiod influences heat production to a similar degree as does ambient temperature. Acclimation to cycles of a long scotophase had the same effect on heat production as acclimation to a cold ambient temperature.

Original language	English
Pages (from-to)	547-549
Number of pages	3
Journal	Comparative Biochemistry & Physiology; A: Comparative Physiology
Volume	63
Issue number	4
DOIs	https://doi.org/10.1016/0300-9629(79)90193-2
State	Published - 1979

ASJC Scopus subject areas

Physiology

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10.1016/0300-9629(79)90193-2

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title = "Heat production induced by photoperiodicity in the pigeon",

abstract = "1. 1. The effect of photoperiodicity on heat production was studied in pigeons (Columba livia) acclimated to 12L:12D, 24D, 4L:20D and 24L at Ta = 22°C, to 4L:20D at Ta = 32°C and to 24L at Ta = 2°C. 2. 2. Pigeons acclimated to 4L:20D at Ta = 22°C increased oxygen consumption significantly (P < 0.05) at Ta= 26°C and Ta = 6°C, compared to the control group (12L:12D at Ta = 22°C). Body weight in these birds decreased significantly (P < 0.01 ) due to acclimation. 3. 3. Oxygen consumption was high but not significantly increased in pigeons acclimated to cycles of 4L:20D at Ta = 32°C and 24L at a = 2°C. 4. 4. Pigeons acclimated to 24D were significantly hypothermie (P < 0.01) due to acclimation (at Ta = 22°C), while no change in body weight was observed. 5. 5. Photoperiod influences heat production to a similar degree as does ambient temperature. Acclimation to cycles of a long scotophase had the same effect on heat production as acclimation to a cold ambient temperature.",

author = "A. Haim and S. Saarela and R. Hissa",

year = "1979",

doi = "10.1016/0300-9629(79)90193-2",

language = "English",

volume = "63",

pages = "547--549",

journal = "Comparative Biochemistry \& Physiology; A: Comparative Physiology",

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AU - Haim, A.

AU - Saarela, S.

AU - Hissa, R.

PY - 1979

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N2 - 1. 1. The effect of photoperiodicity on heat production was studied in pigeons (Columba livia) acclimated to 12L:12D, 24D, 4L:20D and 24L at Ta = 22°C, to 4L:20D at Ta = 32°C and to 24L at Ta = 2°C. 2. 2. Pigeons acclimated to 4L:20D at Ta = 22°C increased oxygen consumption significantly (P < 0.05) at Ta= 26°C and Ta = 6°C, compared to the control group (12L:12D at Ta = 22°C). Body weight in these birds decreased significantly (P < 0.01 ) due to acclimation. 3. 3. Oxygen consumption was high but not significantly increased in pigeons acclimated to cycles of 4L:20D at Ta = 32°C and 24L at a = 2°C. 4. 4. Pigeons acclimated to 24D were significantly hypothermie (P < 0.01) due to acclimation (at Ta = 22°C), while no change in body weight was observed. 5. 5. Photoperiod influences heat production to a similar degree as does ambient temperature. Acclimation to cycles of a long scotophase had the same effect on heat production as acclimation to a cold ambient temperature.

AB - 1. 1. The effect of photoperiodicity on heat production was studied in pigeons (Columba livia) acclimated to 12L:12D, 24D, 4L:20D and 24L at Ta = 22°C, to 4L:20D at Ta = 32°C and to 24L at Ta = 2°C. 2. 2. Pigeons acclimated to 4L:20D at Ta = 22°C increased oxygen consumption significantly (P < 0.05) at Ta= 26°C and Ta = 6°C, compared to the control group (12L:12D at Ta = 22°C). Body weight in these birds decreased significantly (P < 0.01 ) due to acclimation. 3. 3. Oxygen consumption was high but not significantly increased in pigeons acclimated to cycles of 4L:20D at Ta = 32°C and 24L at a = 2°C. 4. 4. Pigeons acclimated to 24D were significantly hypothermie (P < 0.01) due to acclimation (at Ta = 22°C), while no change in body weight was observed. 5. 5. Photoperiod influences heat production to a similar degree as does ambient temperature. Acclimation to cycles of a long scotophase had the same effect on heat production as acclimation to a cold ambient temperature.

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U2 - 10.1016/0300-9629(79)90193-2

DO - 10.1016/0300-9629(79)90193-2

M3 - Article

AN - SCOPUS:0018583718

SN - 0300-9629

VL - 63

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JO - Comparative Biochemistry & Physiology; A: Comparative Physiology

JF - Comparative Biochemistry & Physiology; A: Comparative Physiology

IS - 4

ER -

Heat production induced by photoperiodicity in the pigeon

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