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Year Published: 2009

Effects of cadmium on growth, metamorphosis and gonadal sex differentiation in tadpoles of the African clawed frog, Xenopus laevis

Xenopus laevis larvae were exposed to cadmium (Cd) at 0, 1, 8. 85 or 860 mu g L(-1) in FETAX medium from 0 to 86 d postfertilization. Premetamorphic tadpoles were sampled on day 3 1; pre and prometamorphic tadpoles on day 49; and frogs (NF stage 66) between days 50 and 86. Survival, snout-vent length (SVL), tail length, total length, hindlimb...

Sharma, Bibek; Patino, Reynaldo
Sharma B. Effects of cadmium on growth, metamorphosis and gonadal sex differentiation in tadpoles of the African clawed frog, Xenopus laevis. Chemosphere (Oxford). 2009-08;76:1048-1055.

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Year Published: 2009

Bos grunniens and Bos mutus (Artiodactyla: Bovidae)

Bos grunniens Linnaeus, 1766, and Bos mutus (Przewalski, 1883) are the domestic and wild forms, respectively, of the bovid commonly called the yak. B. mutus inhabits remote high-elevation alpine meadows and alpine steppe in rolling to mountainous terrain in the Tibetan Plateau, and B. grunniens is maintained widely in China and other parts of...

Leslie, David M.; Schaller, George B.

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Year Published: 2009

Carbon isotope turnover as a measure of arrival time in migratory birds

Arrival time on breeding or non-breeding areas is of interest in many ecological studies exploring fitness consequences of migratory schedules. However, in most field studies, it is difficult to precisely assess arrival time of individuals. Here, we use carbon isotope turnover in avian blood as a technique to estimate arrival time for birds...

Oppel, Steffen; Powell, Abby N.

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Year Published: 2009

Habitat use by female mallards in the lower Mississippi alluvial valley

Mallard (Anas platyrhynchos) populations in the lower Mississippi Alluvial Valley (LMAV), USA, historically averaged 1.6 million and represented the largest concentrations of wintering mallards in North America. Effective management of this wintering population requires current information on use of habitats. Accordingly, we employed...

Davis, Bruce E.; Afton, Alan D.; Cox, Robert R.
Davis, BE (Davis, Bruce E.)[ 1 ] ; Afton, AD (Afton, Alan D.)[ 2 ] ; Cox, RR (Cox, Robert R., Jr.)[ 3 ]

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Year Published: 2009

Multi-state succession in wetlands: a novel use of state and transition models

The complexity of ecosystems and mechanisms of succession are often simplified by linear and mathematical models used to understand and predict system behavior. Such models often do not incorporate multivariate, nonlinear feedbacks in pattern and process that include multiple scales of organization inherent within real-world systems. Wetlands...

Zweig, Christa L.; Kitchens, Wiley M.

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Year Published: 2009

West Virginia crayfishes (Decapoda: Cambaridae): observations on distribution, natural history, and conservation

West Virginia's crayfishes have received moderate attention since publication of Jezerinac et al.'s (1995) monograph of the state fauna. Survey efforts were initiated over the summers of 2006 and 2007 to gather voucher material for the Indiana Biological Survey's Crustacean Collection. These collections have provided new information regarding the...

Loughman, Zachary J.; Simon, Thomas P.; Welsh, Stuart A.

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Year Published: 2009

Biogeography of Iberian freshwater fishes revisited: The roles of historical versus contemporary constraints

Aim The question of how much of the shared geographical distribution of biota is due to environmental vs. historical constraints remains unanswered. The aim of this paper is to disentangle the contribution of historical vs. contemporary factors to the distribution of freshwater fish species. In addition, it illustrates how quantifying the...

Filipe, Ana F.; Araújo, Miguel B.; Doadrio, Ignacio; Angermeier, Paul L.; Collares-Pereira, Maria J.

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Year Published: 2009

Recovery distances of nestling Bald Eagles banded in Florida and implications for natal dispersal and philopatry

I used band recovery data to examine distances between banding and recovery locations for 154 nestling Florida Bald Eagles and discuss the implications for understanding natal dispersal and philopatry in this species. Band recoveries occurred in 23 U.S. states and five Canadian provinces between 1931–2005. Recovery distance from the natal...

Wood, Petra Bohall

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Year Published: 2009

Defining optimal freshwater flow for oyster production: effects of freshet rate and magnitude of change and duration on eastern oysters and Perkinsus marinus infection

In coastal Louisiana, the development of large-scale freshwater diversion projects has led to controversy over their effects on oyster resources. Using controlled laboratory experiments in combination with a field study, we examined the effects of pulsed freshwater events (freshet) of different magnitude, duration, and rate of change on oyster...

LaPeyre, Megan K.; Gossman, B.; La Peyre, Jerome F.
La Peyre, Megan K. Defining Optimal Freshwater Flow for Oyster Production: Effects of Freshet Rate and Magnitude of Change and Duration on Eastern Oysters and Perkinsus marinus Infection. Estuaries and coasts 32.3 2009: 522-534. Estuarine Research Federation. 19 Jun 2015.

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Year Published: 2009

Does winter region affect spring arrival time and body mass of king eiders in northern Alaska?

Events during the non-breeding season may affect the body condition of migratory birds and influence performance during the following breeding season. Migratory birds nesting in the Arctic often rely on endogenous nutrients for reproductive efforts, and are thus potentially subject to such carry-over effects. We tested whether king eider (...

Powell, Abby N.; Oppel, Steffen

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Year Published: 2009

Does mobility explain variation in colonisation and population recovery among stream fishes?

1. Colonisation and population recovery are crucial to species persistence in environmentally variable ecosystems, but are poorly understood processes. After documenting movement rates for several species of stream fish, we predicted that this variable would influence colonisation rates more strongly than local abundance, per cent occupancy, body...

Angermeier, Paul L.; Albanese, Brett; Peterson, James

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Year Published: 2009

FishTraits Database

The need for integrated and widely accessible sources of species traits data to facilitate studies of ecology, conservation, and management has motivated development of traits databases for various taxa. In spite of the increasing number of traits-based analyses of freshwater fishes in the United States, no consolidated database of traits of this...

Angermeier, Paul L.; Frimpong, Emmanuel A.
FishTraits Database; 2009; Web site; Angermeier, Paul L.; Frimpong. Emmanuel A.