Search results for "Amphipod"

Modulatory effects of the serotonergic and histaminergic systems on reaction to light in the crustacean Gammarus pulex

2013

Serotonin modulates reaction to light in many animals. In the freshwater amphipod Gammarus pulex, exogenous administration of serotonin induces a transient reversal of photic behaviour from strong photophobia to photophily. We have elucidated further the neuromodulation of photic behaviour in G. pulex by using in vivo pharmacology and behavioural testing. Using several mammalian 5-HT receptor antagonists and agonists, we provide evidence for a role of serotonin receptors in the 5-HT-dependent regulation of G. pulex photic behaviour, possibly involving 5-HTR2 subtype. Serotonin-induced photophily was blocked by the 5-HT receptor antagonists, mianserin, cyproheptadine, and ritanserin, but not…

Re-description of Orchestia stephenseni (CRUSTACEA: AMPHIPODA: TALITRIDAE) with remarks on variation of the Gn2 and DNA-barcoding identification.

2014

ALIEN SPECIES: FRIEND OR ENEMY OF ENVIRONMENTAL HEALTH?

2017

Establishment of the nomenclatural status of two nomina, Stenothoe bella Krapp-Schickel & Lo Brutto, 2015 and Stenothoe levantina Krapp-Schickel & Lo…

2022

Stenothoe bella Krapp-Schickel & Lo Brutto, 2015 and Stenothoe levantina Krapp-Schickel & Lo Brutto, 2015 are now available according to the International Code of Zoological Nomenclature (ICZN 1999, 2012). The present note serves to validate the names Stenothoe bella and Stenothoe levantina by fulfilling ICZN conditions for nomenclatural availability.

Sicilian Amphipoda fauna: gaps and challenges

2019

Proceedings of the 17th International Colloquium on Amphipoda (17th ICA), September 4th-7th 2017, Trapani (Italy)

2017

Proceedings MEB Amphipoda, Palermo 2011

2013

Diel feeding habits of juveniles of Mullus surmuletus (Linneo, 1758) in the lagoon of the Stagnone di Marsala (Western Sicily, Italy)

1999

Diet composition, feeding rhythm, gastric evacuation rate and daily ration were investigated in juvenile Mulhis surmuletus (Linneo, 1758). Fish were collected in the lagoon of the Stagnone di Marsala in western Sicily, in July 1995, during a 24 h sampling period. Copepoda, Polychaeta, Amphipoda and Tanaidacea were shown to be the most frequent prey items. The feeding index values showed two different daily feeding times. A unimodal trend in the daily rhythm of food consumption was derived, with a peak in feeding between 1200 and 2000 h. Gastric evacuation in juvenile M. surmuletus is best described by an exponential model, with a gastric evacuation rate R = 0.66 g h-1 (r = 0.88) (T = 24.45 …

Stable carbon and nitrogen ratios in the sand smelt from a Mediterranean coastal area: Feeding habits and effect of season and size

2002

Enriched (δ13C values (annual average - 11·2%) suggest that in the study site (Stagnone di Marsala, Italy) the sand smelt Atherina boyeri exploited benthic prey throughout the year. In particular, Mysidacea and Isopoda seemed to dominate the diet. Stomach content data from the literature was in partial agreement with the present isotopic analysis suggesting that, while Mysidacea and Isopoda are exploited by A. boyeri, Copepoda Harpacticoida and Amphipoda are the dominant food items of the sand smelt diet. Several hypotheses are proposed to explain such partially different results from the two techniques. Both season and size influenced the δ13C and δ15N values of A. boyeri. Although through…

Crostacei Anfipodi associati ai reef di Sabellaria alveolata (Annelida: Sabellariidae) del Canale di Sicilia (Mar Mediterraneo)

2015

We describe diversity and patterns of spatial distribution of the amphipod fauna associated with reefs of the polychaete Sabellaria alveolata (L.) in the Sicily Strait. Samples were collected in June 2013, at three localities. Amphipod assemblages appeared homogeneous in the study area with variability increasing with decreasing spatial scale of observation. Jassa ocia (Bate) and Gammaropsis ulrici Krapp-Schickel & Myers characterized the studied assemblages.