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首页> 外文期刊>Marine Biology: International Journal on Life in Oceans and Coastal Waters >Reproductive parameters of female Hawaiian damselfish Dascyllus albisella with comparison to other tropical and subtropical damselfishes
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Reproductive parameters of female Hawaiian damselfish Dascyllus albisella with comparison to other tropical and subtropical damselfishes

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摘要

The reproductive ecology of female Hawaiian damselfish Dascyllus albisella (Gill) was studied at Kaneohe Bay, Oahu, Hawaii (21°27'N; 157°47'W) during two peak reproductive seasons (June-September 1997, July-August 1998). In both years, spawning occurred cyclically every 5-7 days, with all spawning in the study area in each cycle concluding within 2-3 days. The study period encompassed 16 spawning cycles in 1997 and 10 cycles in 1998. Some females spawned in almost all cycles, whereas others spawned in as few as one. Mean spawning interval of individual females ranged from 6.4 to 11.7 days in 1997 and from 5.5 to 29.0 days in 1998. Batch fecundity increased exponentially with body length, and ranged from 23,100 to 52,800. Spawning duration increased linearly with body length and ranged from 20 to 286 min. On a single day, large females spawned earlier than small females. Females mated with several different males over a season, but typically mated with only one male on a single spawning day. Female spawning frequency and interval, spawning duration, batch fecundity, as well as diel timing of spawning in D. albisella were comparable to those reported for other large, planktivorous, non-territorial damselfishes.

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