@article{bucci_rebach_demaster_showers_2007, title={A comparison of blue crab and bivalve delta N-15 tissue enrichment in two North Carolina estuaries}, volume={145}, DOI={10.1016/j.envpol.2006.03.009}, abstractNote={Stable isotope analyses (delta(15)N) were used to examine invertebrate tissue enrichment in two North Carolina estuaries with differing amounts of nutrient loading. Bivalves collected from a nutrient sensitive estuary yielded a significant difference in mean nitrogen isotopic composition of tissue (10.4 per thousand+/-0.82; N=66) compared to bivalves collected from a less nutrient sensitive estuary (6.4 per thousand+/-0.63; N=45). Similarly, blue crabs from nutrient sensitive sites had a nitrogen isotopic composition of 11.4 per thousand (+/-1.3, N=77), which was significantly different (P<0.001) than the tissue of less nutrient sensitive blue crabs (9.6 per thousand+/-0.6; N=77). The results showed that an inverse relationship exists between invertebrate tissue enrichment and indicators of water quality across estuarine sites. This study suggests that a relationship may exist between nutrient sources and subsequent energy transfer to estuarine consumers in two North Carolina estuaries.}, number={1}, journal={Environmental Pollution}, author={Bucci, J. P. and Rebach, S. and Demaster, D. and Showers, W. J.}, year={2007}, pages={299–308} }
 @article{linton_rebach_kennedy_2007, title={Notes on the behavior of Blue Crabs, Callinectes sapidus Rathbun, 1896 feeding on two morphologically dissimilar clams}, volume={80}, ISSN={["0011-216X"]}, DOI={10.1163/156854007781363088}, abstractNote={We examined feeding by the blue crab, Callinectes sapidus on the softshell clam, Mya arenaria (their shells gape at both ends) and the Atlantic rangia clam, Rangia cuneata (their shell margins shut tightly). The maximum sizes of both species that could be opened by crabs was determined, along with techniques used by crabs to open and eat them. The largest softshell clam eaten was significantly larger than the largest rangia that could be opened. Provided with five softshell clams in each of five size groups at the start of a 14-day experiment, crabs on Day 1 ate proportionately more intermediate-sized (4-5 cm) clams, then larger clams (5-7 cm), smaller clams (3-4 cm), and the largest clams (7+cm) in that order; this pattern continued throughout the first three days, by which time nearly all clams had been eaten. We provided two or three size classes of softshell clams to four size classes of crabs (small, medium, large, and jumbo) and gave two size classes of rangia to two sizes of blue crabs (small, jumbo) and videotaped the crabs' feeding techniques. Blue crabs used 11 techniques to open softshell clams compared with 5 used to open rangia. When opening softshell clams, small and medium crabs pried, pulled apart, and bored into shells frequently, cracking and crushing next most frequently. Large and jumbo crabs cracked and crushed most frequently, followed by prying and pulling shells apart. Twisting the siphon and clam body was also common. Differences in clam shell morphology and strength imply that softshell clams are more easily fed upon by blue crabs than are rangia clams. Size provides partial protection from blue crab predation in that small blue crabs might not be able to feed easily on large softshell clams and perhaps only the largest blue crabs can open large rangia. L'alimentation du crabe bleu Callinectes sapidus a partir de deux especes de clams, Mya arenaria, clam a coquille molle (a coquille beant aux deux extremites) et le clam rangia Rangia cuneata (a coquille fortement fermee) a ete examinee. Pour les deux especes, la taille maximum qui peut etre ouverte par des crabes a ete determinee, ainsi que des techniques utilisees par les crabes pour les ouvrir et les ingerer. Le plus grand clam a coquille molle mange etait significativement plus grand que le plus grand clam rangia qui a pu etre ouvert. Dans une experience de 14 jours, on a fourni 5 clams a coquille molle a chacun des cinq groupes de taille. Le jour 1, les crabes mangent dans l'ordre les clams de taille intermediaire (4-5 cm), puis les grands clams (5-7 cm), les clams les plus petits (3-4 cm) et les plus grands (7+cm). Ce modele se poursuit pendant les trois premiers jours, temps au bout duquel pratiquement tous les clams ont ete manges. Nous avons donne deux ou trois tailles de clam a coquille molle a quatre classes de taille de crabes (petit, moyen, grand et jumbo) et deux tailles de rangia a deux tailles de crabes (petit et jumbo) et nous avons filme les techniques d'alimentation. Les crabes bleus utilisent 11 techniques pour ouvrir les clams a coquille molle et seulement 5 pour ouvrir les rangia. Pour ouvrir les clams a coquille molle, les crabes petits et moyens forcent, dechiquetent et percent les coquilles frequemment, cassant et ecrasant moins souvent. Les crabes grands et jumbo cassent et ecrasent plus souvent puis forcent et ecartent les coquilles. Tordre le siphon et le corps du clam est aussi assez frequent. Des differences dans la morphologie de la coquille et sa solidite impliquent que les clams a coquille molle sont plus aisement consommes que les clams rangia. La taille procure une protection partielle contre la predation par les crabes bleus, donc les petits crabes bleus ne seraient pas capables de se nourrir facilement de clams a coquille molle et seulement les plus grands crabes peuvent ouvrir les grands clams rangia.}, number={7}, journal={CRUSTACEANA}, author={Linton, Carlisa M. and Rebach, Steve and Kennedy, Victor S.}, year={2007}, month={Jul}, pages={779–792} }
 @article{bucci_showers_rebach_demaster_genna_2007, title={Stable isotope analyses (delta N-15 and delta C-13) of the trophic relationships of Callinectes sapidus in two north Carolina estuaries}, volume={30}, ISSN={["1559-2731"]}, DOI={10.1007/BF02841395}, number={6}, journal={ESTUARIES AND COASTS}, author={Bucci, J. P. and Showers, W. J. and Rebach, S. and DeMaster, D. and Genna, B.}, year={2007}, month={Dec}, pages={1049–1059} }
 @article{salierno_rebach_christman_2003, title={The effects of interspecific competition and prey odor on foraging behavior in the rock crab, Cancer irroratus (Say)}, volume={287}, ISSN={["0022-0981"]}, DOI={10.1016/S0022-0981(02)00575-0}, abstractNote={The effects of competitor pressure and prey odor on foraging behavior of the rock crab, Cancer irroratus (Say), were investigated. The Jonah crab, Cancer borealis (Stimpson), was chosen as the interspecific competitor because it shares resources with C. irroratus. Four treatments were tested for their effect on foraging: the presence or absence of a competitor and two types of prey odor; body odor (living mussel) and tissue extract (dead mussel tissue). The presence of Jonah crabs did not influence location time, search time, prey size selected, or handling time of the rock crabs. However, rock crabs responded differently to the presence of body odor and tissue extract cues. The presence of extract odor decreased the time to locate prey while increasing the number of prey manipulated and prey size selected. When prey body odor was present, rock crabs displayed less investigative behaviors than in the presence of extract odor, illustrated by reduced location time. Extract odor provided a stronger and more attractive cue than body odor, but increased prey manipulation and search time. Extract odor induced increases in manipulation and searching for prey but canceled out the benefits of decreased location time, resulting in crabs from both treatments displaying similar search times. These elevated behaviors may be associated with foraging for injured and cracked prey or may indicate an area of conspecific feeding.}, number={2}, journal={JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY}, author={Salierno, JD and Rebach, S and Christman, MC}, year={2003}, month={Mar}, pages={249–260} }