Ichthyology & Herpetology Volume 106: Issue 4

It is important that species descriptions be accurate. This is especially true with threatened and endangered species, where the scientific literature provides context for species identification and management decisions. In 1953, Bragg documented the advertisement calls of both Southern Crawfish Frogs (Lithobates a. areolatus) and Northern Crawfish Frogs (L. a. circulosus) and concluded L. a. areolatus have lower frequency calls. One of us (M.J.L.) has long felt this observation was incorrect, because adult L. a. areolatus are smaller than L. a. circulosus, and anurans with smaller body sizes tend to produce higher, not lower, frequency calls. Bragg's observations are not only the sole comparative assessment of advertisement call characteristics of L. areolatus in the primary literature, but also represent the only assessment of the advertisement calls of any of the four species comprising the subgenus Nenirana, which consists of threatened and endangered Gopher Frogs (L. capito and L. sevosus) and Pickerel Frogs (L. palustris). Given this dearth of information, the reliability of this information, and the conservation concerns surrounding this group, we felt it was necessary to reassess the advertisement calls of Crawfish Frogs and give them context by describing the calls of the Nenirana species L. capito and L. palustris. Our data revise Bragg's conclusions, but just as importantly, we show that the call characteristics of L. capito and L. palustris are similar by having long calls with long interpulse intervals, while both subspecies of L. areolatus have shorter calls with less interpulse separation. These results do not align with morphological and phylogenetic clustering within the Nenirana, but are consistent with call character displacement within this group. Additional data will be necessary to test this inference.

Understanding how environmental factors influence various aspects of freshwater turtle health remains an important yet understudied topic within the context of individual–environment interactions. This is particularly true of host-associated bacterial microbiota, which are being increasingly recognized as a significant and understudied topic in the context of individual turtle health. While this area of work has expanded in certain areas, research efforts remain limited with regard to host–microbiota interactions in the context of habitat contaminants. Specifically, the commonly used herbicide, glyphosate, is of interest due to its massive worldwide use and known effects on various organisms. Effects of captivity on host-associated microbial community structure also remain largely unknown in various non-model organisms. To address these unknown effects of Roundup^® and captivity on host-associated microbiomes, we examined the effects of low-level Roundup^® exposure and captivity on the cloacal microbiota of the False Map Turtle, Graptemys pseudogeographica. We determined the effect of glyphosate by taking cloacal swabs pre- (0 h) and post-exposure (72 h) and examined microbial community beta- and alpha-diversity through 16S rRNA gene high-throughput sequencing. The results of this study indicate that low-level, short-term glyphosate exposure does not significantly alter the microbiota structure of G. pseudogeographica. However, there was a significant decrease in microbial community beta-diversity over time, confirming a trend that has been observed to a limited extent in other non-model organisms when put in laboratory conditions. These results are useful in understanding the baseline cloaca microbial community structure of G. pseudogeographica, as well as the implications and limitations of laboratory-based microbiota studies. Furthermore, this work suggests that low-level and short-term glyphosate exposure does not have a significant effect on the cloacal microbial community structure in wild-caught G. pseudogeographica.

Knowledge of how patterns in fish assemblages are spatially structured is important for guiding management and conservation actions. However, most studies have taken place in the eastern and midwestern U.S., resulting in a poor understanding of factors influencing western stream fishes. The objectives of this study were to evaluate habitat and species associations of fishes in Deep Creek, a small tributary of the Kootenai River in Idaho. Fishes and habitat were sampled from 58 reaches in Deep Creek. In total, 7,129 individual fishes representing 18 species were sampled. Patterns in species richness were largely a function of channel gradient and associated habitat characteristics. Species richness decreased with increased channel gradient. Species-specific habitat relationships for native and nonnative fishes in Deep Creek provided specific insights into the ecology of each species. Predicted probability of occurrence and relative abundance varied by species and were related to a broad suite of environmental characteristics. This study provides insight on patterns of fish assemblage structure, as well as important information on the ecology of native and nonnative fishes in a western stream system.

Adams, Michael J. (see Pearl, Christopher A.)
Adams, Nicole E., Matthew D. Dean, and Gregory B. Pauly. Morphological Divergence among Populations of Xantusia riversiana, a Night Lizard Endemic to the Channel Islands of California
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Albert, James S. (see Evans, Kory M.)
Allen, Larry G. (see Benseman, Stephanie A.)
Allen, Larry G. (see Clark, Brian L. F.)
Anderson, Roger A. (see Powers, Sean D.)
Anderson, William D., Jr. Charles Plumier (1646--1704) and His Drawings of French

Comparative Call Characteristics in the Anuran Subgenus Nenirana

Bacterial Microbiota Response in Graptemys pseudogeographica to Captivity and Roundup^® Exposure

Patterns in Fish Assemblage Structure in a Small Western Stream

Sensitivity Analysis Using Site-Specific Demographic Parameters to Guide Research and Management of Threatened Eastern Massasaugas

A New Species of Spatuloricaria Schultz, 1944 (Siluriformes: Loricariidae), from the Orinoco River Basin, Colombia

Fantastic Beasts and Where to Find Them: A New Species of the Frogfish Genus Histiophryne Gill (Lophiiformes: Antennariidae: Histiophryninae) from Western and South Australia, with a Revised Key to Congeners

A New Species of Pareiorhaphis (Loricariidae: Neoplecostominae) from the Mucuri River Basin, Minas Gerais, Eastern Brazil

The First In Situ Encounter of Gigantura chuni (Giganturidae: Giganturoidei: Aulopiformes: Cyclosquamata: Teleostei), with a Preliminary Investigation of Pair-Bonding

Feasibility of Using Computer-Assisted Software for Recognizing Individual Rio Grande Cooter (Pseudemys gorzugi)

Propagation of Endangered Moapa Dace

A New Species of Curculionichthys (Siluriformes: Hypoptopomatinae) from the Western Border of the Brazilian Shield, Madeira River Basin, Brazil

Using Morphology to Test DNA-Based Phylogenetic Relationships within the Guiana Shield Catfish Tribe Lithoxini (Siluriformes: Loricariidae)

Editorial Notes and News

HENRY S. FITCH AWARD FOR EXCELLENCE IN HERPETOLOGY—CALL FOR NOMINATIONS

Summary of the Meetings

Volume Contents

Temperature Manipulation Induces Ecdysis in Lab-Held Rattlesnakes

Integrative Taxonomy Reveals a New Species of Imparfinis (Siluriformes: Heptapteridae) from the Upper Xingu River Basin

A New Species of Psalidodon (Characiformes: Acestrorhamphidae) from the Upper Rio São Francisco Basin, Brazil, with Comments on Hasemania

SUMMARY OF THE MEETINGS

Illuminating the Early Life of Salamanders: Exploring Biofluorescence During Development