The Crayfishes (Decapoda: Cambaridae) of West Virginia

Dunham, David; Jezerinac, Raymond F.; Stocker, G. Whitney; Tarter, Donald C.

doi:10.2307/1549473

Cited by 12 publications

(8 citation statements)

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“…The smallest Form I male was 36.4 mm TCL, whereas the largest Form I male was 66.4 mm TCL (Table 1). Previously published work on the life history of this species demonstrates that males are capable of moulting to Form I at smaller sizes (31.8 mm TCL as reported in Jezerinac et al, 1995). In females, the smallest female exhibiting active glair glands was 39.2 mm TCL, whereas the largest female with active glair glands was 60 mm TCL (Table 1).…”

Section: Resultssupporting

confidence: 53%

“…The majority of ovigerous females that we collected were found in August, with 14% of the total females collected during this month carrying eggs (Figure 4). Two previous studies that have reported collecting ovigerous C. chasmodactylus only found them in August (Fagundo & Loughman, 2015; Jezerinac et al, 1995). Jezerinac et al (1995) hypothesized that in C. chasmodactylus , mating and egg extrusion were restricted to August.…”

Section: Resultsmentioning

confidence: 98%

“…Two previous studies that have reported collecting ovigerous C. chasmodactylus only found them in August (Fagundo & Loughman, 2015; Jezerinac et al, 1995). Jezerinac et al (1995) hypothesized that in C. chasmodactylus , mating and egg extrusion were restricted to August. Overall, our findings corroborate this hypothesis; although it is worth noting that we also found ovigerous females in September and October, which extends the known period in which egg extrusion is likely to occur within C. chasmodactylus .…”

Section: Resultsmentioning

confidence: 98%

“…Form I males were common at the beginning and the end of the activity season, with 34% of males being Form I during May and 50% of males in September and October. The month where we collected the lowest amount of Form I males was August, where only 5% of the sampled males were Form I. Jezerinac et al (1995) found that the prevalence of Form I males in C. chasmodactylus peaked in July through October (Jezerinac et al, 1995). However, our results demonstrate that C. chasmodactylus is capable of moulting into Form I much earlier throughout the activity season, with a peak in the percentage of males being in Form I later (September and October) than what earlier Jezerinac and colleagues had reported previously (Jezerinac et al, 1995).…”

Section: Resultsmentioning

confidence: 98%

“…The New River Crayfish (Figure 1), Cambarus chasmodactylus is the largest native species of crayfish in West Virginia, reaching carapace lengths over 60 mm (Jezerinac et al, 1995; Loughman et al, 2009). Cambarus chasmodactylus inhabits high‐order lotic environments and can be collected in their preferred habitats under large slab boulders in the riffle and run microhabitats (Fagundo & Loughman, 2015; Loughman et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Life history and neonate behaviour of the new river crayfish Cambarus chasmodactylus James 1966 (Decapoda: Astacoidea: Cambaridae) from the central portion of the species range

Graham

Loughman

2022

Acta Zoologica

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We studied the life history of the New River Crayfish, Cambarus chasmodactylus in Anthony, Creek, West Virginia during an entire activity season—from May 2011 through October 2011. We observed two mass moulting events; one occurred in May, whereas the other occurred in September. Most males within this population moulted from Form I (i.e. reproductive form) to Form II (i.e. non‐reproductive form) in May and then later returned to Form I after a September moulting event. We collected females with active glair glands from May to June, with oviposition occurring from July to August. Fecundity was high and weakly correlated with body size. Egg counts of attached eggs/young in ovigerous females ranged from 41 to 281, with an average of 168. Additionally, from June to October, we dissected a subset of females to determine the monthly gonadal development in females with and without active glair glands. Lastly, in the laboratory, we observed 4th instar neonate crayfishes repeatedly “drifting” between females. We speculate on the relevance of this drifting behaviour and propose future studies to investigate this phenomenon. Our study provides the first comprehensive understanding of the life history of C. chasmodactylus.

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Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Life history and neonate behaviour of the new river crayfish Cambarus chasmodactylus James 1966 (Decapoda: Astacoidea: Cambaridae) from the central portion of the species range

Graham

Loughman

2022

Acta Zoologica

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Consumption of the eggs, hatchlings, and tadpoles of Green Frogs (Lithobates clamitans) by native and non-native predators

et al. 2019

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Predation by native and non-native predators on the eggs, embryos, and early stage tadpoles can affect the recruitment of offspring into a population. We examined the effects of native (Little Brown Mudbugs, Cambarus thomai; overwintered Rana tadpoles; Common Green Darner, Anax junius, larvae) and non-native (Western Mosquitofish, Gambusia affinis) potential predators on the eggs, hatchlings, and early tadpoles of the Green Frog (Lithobates clamitans). The predators had no effect on survivorship or hatching of L. clamitans eggs. However, tadpole survivorship was significantly reduced by dragonfly larvae and crayfish, but not G. affinis or the overwintered ranid tadpoles. Our observation that invertebrates consumed Green Frog tadpoles while vertebrates did not is consistent with palatability contributing to the tadpoles’ susceptibility to different predators. Our results therefore suggest Green Frog tadpoles, but not eggs or embryos, from some populations may be subject to differential predation by invertebrate and vertebrate predators.

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Cambarus (C.) hatfieldi, a new species of crayfish (Decapoda:Cambaridae) from the Tug Fork River Basin of Kentucky, Virginia and West Virginia, USA

Loughman

Fagundo

Lau

et al. 2013

Zootaxa

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Cambarus (Cambarus) hatfieldi is a stream-dwelling crayfish that appears to be endemic to the Tug Fork River system of West Virginia, Virginia, and Kentucky. Within this region, it is prevalent in all major tributaries in the basin as well as the Tug Fork River's mainstem. The new species is morphologically most similar to Cambarus sciotensis and Cambarus angularis. It can be differentiated from C. sciotensis by its squamous, subtrinagular chelae compared to the elongate triangular chelae of C. sciotensis; its shorter palm length/palm depth ratio (1.9) compared to C. sciotensis (2.3); and a smaller areola length/total carapace length ratio (30.4% vs.36.5% respectively). Cambarus hatfieldi can be differentiated from C. angularis by its smaller areola length/total carapace length ratio (30.4% vs. 36.7% respectively); a smaller rostrum width/rostral length ratio (59.4% vs. 67.2% respectively); its rounded abdominal pleura as compared to the subtruncated pleura of C. angularis; the length of the central projection and mesial process of C. hatfieldi which both extend to the margin of the gonopod shaft or slightly beyond the margin compared to the central projection of C. sciotensis and C. angularis where both extend well beyond the margin of the gonopod shaft.

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The Crayfishes (Decapoda: Cambaridae) of West Virginia

Cited by 12 publications

References 0 publications

Life history and neonate behaviour of the new river crayfish Cambarus chasmodactylus James 1966 (Decapoda: Astacoidea: Cambaridae) from the central portion of the species range

Life history and neonate behaviour of the new river crayfish Cambarus chasmodactylus James 1966 (Decapoda: Astacoidea: Cambaridae) from the central portion of the species range

Consumption of the eggs, hatchlings, and tadpoles of Green Frogs (Lithobates clamitans) by native and non-native predators

Cambarus (C.) hatfieldi, a new species of crayfish (Decapoda:Cambaridae) from the Tug Fork River Basin of Kentucky, Virginia and West Virginia, USA

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