期刊名称：Western Australia. Fisheries Department. Fisheries Research Reports
印刷版ISSN：1035-4549
出版年度：2009
卷号：187
页码：47-47
出版社：Government of Western Australia / Department of Fisheries
摘要：Although the majority of aggregating species are pelagic spawners (Claydon 2004), they exhibit
a wide variety of life history strategies. Many typically school for feeding or shelter, and when
aggregated for spawning do so in multi-male, multi-female groups. These polygamous species
include pink snapper, Spanish mackerel, orange roughy and tropical snappers (F. Lutjanidae).
Males of these species have relatively large testes and attempt to maximise spawning success
by releasing large volumes of sperm during group spawning events (Stockley et al. 1997).
Other species are less gregarious when not aggregated for spawning. These include various
species of grouper (F. Serranidae), in which individuals often spawn in pairs. Males of these
monogamous species attempt to maximise spawning success by competing physically for
access to spawning females or favoured spawning sites. As such, smaller less competitive
males have decreased spawning success. Because there is less need to produce large volumes
of sperm when pair spawning, males of these species have relatively small testes.
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