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您的检索式：作者名="Mark A.BEEKEY"
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| 1 | Reproductive behavior in horseshoe crabs:Does density matter?显示文摘While the four species of horseshoe crabs share many common reproductive traits with respect to their reproductivesystems,they do differ with respect to their mating behavior (monogamy vs.polygynandry).Past research has attributed thesedifferences to a number of factors including:spawning densities,operational sex ratios (OSR's),male condition (or age),environmentaland/or genetic factors,or a combination thereof.Mating behaviors in the three Asian horseshoe crab species (Tachypleusgigas,T.tridentatus,and Carcinoscorpius rotundicauda) with low spawning densities and 1:1 operational sex ratios aretypically monogamous.In Limulus polyphemus,mating behavior is more variable ranging from monogamy to polygynandry.Herewe provide evidence,through a long term behavioral study,that variation in mating behavior is influenced by population densityin L.polyphemus.Our study population on two beaches in Connecticut (Long Island Sound) have a spawning density 400 timesless than that found in Delaware Bay (0.002 females/m^2 vs.0.8 females/m^2) but similar operational sex ratios.Between 90%-95%of all spawning females in CT were paired with only one male,thus exhibiting monogamous behavior.In contrast,between 30and 60% of spawning females in Delaware Bay have more than one mate and produce clutches of eggs with multiple paternities.Male condition played no role in mating behavior in CT populations.We also observed that on average 18% of the females on thespawning beaches are single.These results suggest that population density is an important condition that determines mating behavior.Also,low population density may lead to decreased mate finding ability and lost opportunities for | Jennifer H.MATTEI Mark A.BEEKEY Adam RUDMAN Alyssa WORONIK | 2010 | Current Zoology2010，56，5： | 2 |
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