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wrw2602Òø³æ (СÓÐÃûÆø)
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freshwater biology
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×î½üÎÒÔÚ¿´µË®Éú̬ѧ±¨ÖеÄÕâÆªÎÄÕ£ºLife history traits and abundance can predict local colonisation and extinction rates of freshwater mussels£¬ÆäÖÐÔÚÕâ¶Îµ±ÖÐMantle lures, found in the Lampsilini, are pigmented modifications of the mantle that mimic prey items (i.e. minnows,crayfish) of predacious fish. These flaps surround the swollen gills (marsupia) where the female broods the glochidia. Gravid females extend their posterior shell margins above the substratum and periodically move the mantle flaps to resemble swimming prey fish. When a host fish attacks the mantle flaps, the gills are ruptured and glochidia are released and carried onto the gills by respiratory currents (Barnhart et al., 2008). Mantle magazines, found in the Quadrulini, function similarly to lures. For this analysis, I defined no active host attraction (NA) to include mussel species that broadcast free larvae [e.g. Megalonaias nervosa (Rafinesque)], those that release larvae into a mucus web [e.g. Pyganodon grandis (Say)] and those that deposit loose conglutinates without specialised adaptations to attract host fish [e.g. Amblema plicata (Say)]. I defined active host attraction (A) as species that attract hosts via conglutinates, mantle lures or mantle magazines ÓÉÓÚ¼¸¸öµ¥´Ê²»ÖªµÀ¸ÃÔõô·Ò룬ÒÔÖÁÓÚ°ëÌì¸ã²»¶®ÆäÒâ˼£¬Ï£ÍûÄÜÓиö¶®Éú̬ѧµÄ´óÉñÄܰïÎÒÀí½âÏÂÕâ¶Î»°¡£ |
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wrw2602
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