PATTERNS OF THE ELECTRIC ORGAN DISCHARGE DURING COURTSHIP AND SPAWNING IN THE MORMYRID FISH, POLLIMYRUS-ISIDORI
PATTERNS OF THE ELECTRIC ORGAN DISCHARGE DURING COURTSHIP AND SPAWNING IN THE MORMYRID FISH, POLLIMYRUS-ISIDORI
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DOI:
10.1007/bf00293263
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发表时间:
1989-01-01
影响因子:
2.3
通讯作者:
KRAMER, B
中科院分区:
文献类型:
--
作者:
BRATTON, BO;KRAMER, B
P. isidori''s electric organ discharge (EOD) is of the pulse type. Patterns of EOD intervals were investigated prior to, during and following spawning behaviors as related with overt behaviors, and with the sound production by the nestbuilding male. Prior to the time of reproduction, isolated and socially interacting fish (n = 15) showed characteristic discharge interval patterns for resting, swimming, probing, hovering and hiding activities. Males (n = 8) and females (n = 6) did not differ in the mean EOD repetition rates during resting (11.6 .+-. 2.5 Hz), nor Short Bursts/min (less than 20 intervals of 8-13 ms). In interacting fish Long Bursts (greater than 20 intervals of 8-13 ms, lasting for more than 300 ms) were observed only during the attack and bite sequence. A pursuing fish displayed a rapid alternation of Long Bursts with Discharge Breaks (300-1000 ms silence) during the chase behavior. The nocturnal courtship behavior began soon after dark (1900 h). Spawning typically started 2 to 5 h after dark, continuing for 2 to 6 h until about 0200 h. During courtship and spawning the female''s brief visits (15-25 s) to the male''s territory recurred every 30-60 s. At all other times the female was aggressively excluded from the nest region. Courtship and spawning behaviors are described along with the electrical displays identified from 19 spawnings in three fish pairs (from a total of 37 spawnings in 4 males and 4 females).