http://hdl.handle.net/1957/12721 2013-05-16T10:35:00Z 2013-05-16T10:35:00Z Charnov, Eric L. Hannah, Robert W. http://hdl.handle.net/1957/38584 2013-05-15T00:11:09Z 2002-01-01T00:00:00Z

Shrimp adjust their sex ratio to fluctuating age distributions Charnov, Eric L.; Hannah, Robert W. Long-term data sets that quantitatively confirm basic ecological theory are rare for field populations. Highly variable recruitment often causes wide temporal variation in population age distribution and basic theory for adaptive sex ratio often predicts ‘sex ratio tracking’ to match the fluctuating age distribution. Using sex-changing shrimp as a model system, we test this in a new data set of 20 years duration. The new data support the theory, despite intense fishery exploitation that itself has greatly altered the age distribution in recent years. This is the publisher’s final pdf. The published article is copyrighted by Evolutionary Ecology and can be found at: http://www.evolutionary-ecology.com/.

2002-01-01T00:00:00Z Crabo, Lars G. Davis, Melanie Hammond, Paul Mustelin, Tomas Shepard, Jon http://hdl.handle.net/1957/38300 2013-04-23T17:41:49Z 2013-02-06T00:00:00Z

Five new species and three new subspecies of Erebidae and Noctuidae (Insecta, Lepidoptera) from Northwestern North America, with notes on Chytolita Grote (Erebidae) and Hydraecia Guenée (Noctuidae) Crabo, Lars G.; Davis, Melanie; Hammond, Paul; Mustelin, Tomas; Shepard, Jon Several taxonomic issues in the moth families Erebidae and Noctuidae are addressed for Northwestern North America. Drasteria parallela Crabo & Mustelin and Cycnia oregonensis tristis Crabo in the Erebidae and Eudryas brevipennis bonneville Shepard & Crabo, Resapamea diluvius Crabo, Resapamea angelika Crabo, Resapamea mammuthus Crabo, Fishia nigrescens Hammond & Crabo, and Xestia perquiritata orca Crabo & Hammond in the Noctuidae are described as new. The following new synonyms are proposed: Chytolita petrealis Grote with Herminea morbidalis Guenee; Gortyna columbia Barnes & Benjamin and Gortyna ximena Barnes & Benjamin with Gortyna obliqua Harvey; and Hydroecia pallescens Smith with Hydroecia medialis Smith. The type locality of Gortyna intermedia Barnes & Benjamin is restricted to Lundbreck, Municipality of Crowsnest Pass, Alberta, Canada. This is the publisher’s final pdf. The published article is copyrighted by Pensoft Publishers and can be found at: http://www.pensoft.net/journals/zookeys/.

2013-02-06T00:00:00Z Boucot, Arthur J. Blodgett, Robert B. Rohr, David M. http://hdl.handle.net/1957/38258 2013-04-18T23:46:38Z 2012-03-01T00:00:00Z

Strophatrypa, a new genus of Brachiopoda (Atrypidae), from upper Silurian strata of the Alexander terrane, Southeast Alaska Boucot, Arthur J.; Blodgett, Robert B.; Rohr, David M. The atrypid brachiopod Strophatrypa skaflestadi gen. et sp. nov. occurs in unnamed upper Silurian strata exposed near the town of Hoonah on northeast Chichagof Island, Southeast Alaska. The new genus represents the first strophic atrypoid with many characters otherwise similar to those of the Atrypidae. Although this genus is known from only a single bed at one Alaskan locality, its unique morphology is worth noting in anticipation that similar forms may be discovered elsewhere in the Alexander terrane, or especially somewhere in Siberia where other taxa restricted to the Silurian of the Alexander terrane are shared. This paper represents a further contribution to our limited knowledge of the Silurian brachiopods of the Alexander terrane of Southeast Alaska. This is the publisher’s final pdf. The published article is copyrighted by Czech Geological Survey and can be found at: http://www.geology.cz/bulletin/.

2012-03-01T00:00:00Z Shine, Richard Webb, Jonathan K. Lane, Amanda Mason, Robert T. http://hdl.handle.net/1957/38256 2013-04-18T22:07:41Z 2012-01-01T00:00:00Z

Familiarity with a female does not affect a male's courtship intensity in garter snakes Thamnophis sirtalis parietalis Shine, Richard; Webb, Jonathan K.; Lane, Amanda; Mason, Robert T. In many animal species, males direct more intense courtship towards females they have not previously encountered, than towards females with which they have previously mated. To test the factors responsible for this "Coolidge Effect", we need studies on a wide range of taxa – including those with mating systems in which we would not expect (based on current theory) that such an effect would be evident. The Coolidge Effect has been documented in several lizard species, but has not been looked for (and would not be expected) in snakes. We conducted experimental trials with red-sided garter snakes Thamnophis sirtalis parietalis at a communal den in Manitoba, to see whether previous exposure to a female (either courting, or courting plus mating) modified male mate choice or courtship intensity. In keeping with prediction from theory (but contrary to an early anecdotal report), male garter snakes did not modify their courtship behaviour based upon their familiarity (or lack thereof) with a specific female. At least in large courting aggregations, male snakes may maximize their fitness by basing mate-choice upon immediate attributes of the female (body size, condition, mated status) and the intensity of competition (numbers and sizes of rival males) rather than information derived from previous sexual encounters [Current Zoology 58 (6): 805–811, 2012]. This is the publisher’s final pdf. The published article is copyrighted by Current Zoology, Institute of Zoology, Chinese Academy of Sciences and can be found at: http://www.actazool.org/.

2012-01-01T00:00:00Z