MISDIRECTED AMPLEXUS BETWEEN A PACIFIC TREEFROG (PSEUDACRIS REGILLA) AND A WESTERN TOAD (ANAXYRUS BOREAS) IN A NORTHERN CALIFORNIA UPLAND

Jeff A Alvarez; Elizabeth Lopez; Tara Collins; Angelique Herman; Jennifer Jelincic; Marina L Olsen; Brian Piontek; Alicia I Ringstad; Jeffery T Wilcox

doi:10.1898/NWN20-27

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Jeff A Alvarez,¹ Elizabeth Lopez,² Tara Collins,³ Angelique Herman,⁴ Jennifer Jelincic,⁵ Marina L Olsen,⁶ Brian Piontek,⁷ Alicia I Ringstad,⁸ Jeffery T Wilcox⁹

¹The Wildlife Project, PO Box 188888, Sacramento, CA 95818 USA (JAA);
²Sequoia Ecological Consulting, 156 Diablo Road, Suite 320, Danville, CA 94526 USA (EL)
³West-ervelt Ecological Services, 600 North Market Blvd, Suite 3, Sacramnto, CA 95834 USA (TC)
⁴AECOM, 1194 Pacific Street, Suite 204, San Luis Obispo, CA 93401 USA (AH)
⁵Jacobs, 300 Frank H. Ogawa Plaza, Suite 600, Oakland, CA 94612 USA (JJ)
⁶7029 Treasure Way, Sacramento, CA 95831 USA (MLO)
⁷Horizon Water and Environment, 266 Grand Avenue, Suite 210, Oakland, CA 94610 USA (BP)
⁸Jacobzoon and Associates, Inc., 117 Clara Avenue, Ukiah, CA 95482 USA (AIR)
⁹Sonoma Mountian Ranch Preservation Foundation, 3124 Sonoma Mountain Road, Petaluma, CA 94954 USA (JTW)

Abstract

Misdirected amplexus has been reported between conspecifics, congeners, between different amphibian families, and between amphibians and non-amphibian objects. We observed misdirected amplexus between a Pacific Treefrog and a Western Toad, wherein the treefrog amplexed the toad's leg. These types of events can result in reproductive interference and have also been considered an evolutionary trap for some species.

Citation Download Citation

Jeff A Alvarez, Elizabeth Lopez, Tara Collins, Angelique Herman, Jennifer Jelincic, Marina L Olsen, Brian Piontek, Alicia I Ringstad, and Jeffery T Wilcox "MISDIRECTED AMPLEXUS BETWEEN A PACIFIC TREEFROG (PSEUDACRIS REGILLA) AND A WESTERN TOAD (ANAXYRUS BOREAS) IN A NORTHERN CALIFORNIA UPLAND," Northwestern Naturalist 102(2), 161-163, (6 August 2021). https://doi.org/10.1898/NWN20-27

Received: 27 August 2020; Accepted: 12 October 2020; Published: 6 August 2021

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